Hitachi Nji 350B Users Manual HIDIC MICRO EH APPLICATION

NJI-350B micro-EH-MA-NJI350BX-W

NJI-350B to the manual b0c219f7-c5b8-45bc-99ca-fbfc487bf68c

2015-01-24

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HITACHI PROGRAMMABLE CONTROLLER

APPLICATION MANUAL

NJI-350B (X)

WARNING
To ensure that the equipment described by this manual. As well as all equipment connected to and used
with it, operate satisfactorily and safely, all applicable local and national codes that apply to installing and
operating the equipment must be followed. Since codes can vary geographically and can change with
time, it is the user’s responsibility to determine which standard and codes apply, and to comply with
them.
FAILURE TO COMPLY WITH APPLICABLE CODES AND STANDARDS CAN RESULT IN
DAMAGE TO EQUIPMENT AND / OR SERIOUS INJURY TO PERSONNEL.
INSTALL EMERGENCY POWER STOP SWITCH WHICH OPERATES INDEPENDENTLY OF
THE PROGRAMMABLE CONTROLLER TO PROTECT THE EQUIPMENT AND / OR
PERSONNEL IN CASE OF THE CONTROLLER MALFUNCTION.
Personnel who are to install and operate the equipment should carefully study this manual and any
others referred to by it prior to installation and / or operation of the equipment. Hitachi, Ltd. constantly
strives to improve its products, and the equipment and the manual(s) that describe it may be different
from those already in your possession.
If you have any questions regarding the installation and operation of the equipment, or if more
information is desired, contact your local Authorized Distributor or Hitachi, Ltd.

IMPORTANT
THIS EQUIPMENT GENERATES, USES, AND CAN RADIATE RADIO FREQUENCY ENERGY AND, IF
NOT INSTALLED AND USED IN ACCORDANCE WITH THE INSTRUCTION MANUAL, MAY CAUSE
INTERFERENCE TO RADIO COMMUNICATIONS. AS TEMPORARILY PERMITTED BY REGULATION,
IT HAS NOT BEEN TESTED FOR COMPLIANCE WITH THE LIMITS FOR CLASS A COMPUTING
DEVICES PURSUANT TO SUBPART J OF PART 15 OF FCC RULES, WHICH ARE DESIGNED TO
PROVIDE REASONABLE PROTECTION AGAINST SUCH INTERFERENCE.
OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE INTERFERENCE
IN WHICH CASE THE USER, AT HIS OWN EXPENSE, WILL BE REQUIRED TO TAKE WHATEVER
MEASURES MAY BE REQUIRED TO CORRECT THE INTERFERENCE.

LIMITED WARRANTY AND IMITATION OF LIABILITY
Hitachi, Ltd. (Hitachi) warrants to the original purchaser that the programmable controller (PLC)
manufactured by Hitachi is free from defects in material and workmanship under normal use and
service. The obligation of Hitachi under this warranty shall be limited to the repair or exchange of any
part or parts which may prove defective under normal use and service within eighteen (18) months from
the date of manufacture or twelve (12) months from the date of installation by the original purchaser
which ever occurs first, such defect to be disclosed to the satisfaction of Hitachi after examination by
Hitachi of the allegedly defective part or parts. This warranty in expressly in lieu of all other warranties
expressed or implied including the warranties of merchantability and fitness for use and of all other
obligations or liabilities and Hitachi neither assumes, nor authorizes any other person to assume for
Hitachi, any other liability in connection with the sale of this PLC. This warranty shall not apply to this
PLC or any part hereof which has been subject to accident, negligence, alteration, abuse, or misuse.
Hitachi makes no warranty whatsoever in respect to accessories or parts not supplied by Hitachi. The
term "original purchaser", as used in this warranty, shall be deemed to mean that person for whom the
PLC in originally installed.
In no event, whether as a result of breach of contract, warranty, tort (including negligence) or otherwise,
shall Hitachi or its suppliers be liable for any special, consequential, incidental or penal damages
Including, but not limited to, loss of profit or revenues, loss of use of the products or any associated
equipment, damage to associated equipment, cost of capital, cost of substitute products, facilities,
services or replacement power, down time costs, or claims of original purchaser’s customers for such
damages.
To obtain warranty service, return the product to your distributor, or send it with a description of the
problem, proof of purchase, post paid, insured, and in a suitable package to:
Quality Assurance Dep.
Hitachi Industrial Equipment Systems Co., Ltd.
46-1, Ooaza-Tomioka Nakajo-machi
Kitakanbara-gun, Niigata-ken
959-2608

JAPAN

Copyright 2000 by Hitachi Industrial Equipment Systems Co., Ltd.
All Rights reserved - Printed in Japan
The information and/or drawings set forth in this document and all rights in and to inventions disclosed herein and
patents which might be granted thereon disclosing or employing and the materials, techniques or apparatus described
herein are the exclusive property of Hitachi, Ltd.
No copies of the information or drawings shall be made without the prior consent of Hitachi, Ltd.
Hitachi, Ltd. provides customer assistance in varied technical areas. Since Hitachi does not posses full access to data
concerning all of the uses and applications of customer‘s products, responsibility is assumed by Hitachi neither for
customer product design nor for any infringements of patents or rights of others which may result from Hitachi
assistance.
The specifications and descriptions contained in this manual were accurate at the time they were approved for printing.
Since Hitachi, Ltd. Incorporated constantly strives to improve all its products, we reserve the right to make changes to
equipment and/or manuals at any time without notice and without incurring any obligation other than as noted in this
manual.
Hitachi, Ltd. assumes no responsibility for errors that may appear in this manual.
As the product works with user program and Hitachi, Ltd. cannot test all combination of user program components, it is
assumed that a bug or bugs may happen unintentionally. If it is happened: please inform the fact to Hitachi, Ltd. or its
representative. Hitachi will try to find the reason as much as possible and inform the countermeasure when obtained.
Nevertheless Hitachi, Ltd. intends to make products with enough reliability, the product has possibility to be damaged at
any time. Therefore personnel who are to install and operate the equipment has to prepare with the counter-measure such
as power off switch can be operated independently of the controller. Otherwise, it can result in damage to equipment
and/or serious injury to personnel.

Safety Precautions
Read this manual and attached documents thoroughly before installing and operating this unit, and performing
maintenance or inspection of this unit in order to use the unit correctly. Be sure to use this unit after acquiring adequate
knowledge of the unit, all safety information, and all precautionary information. Also, be sure to deliver this manual to
the person in charge of maintenance.
Safety caution items are classified as “Danger” and “Caution” in this document.

DANGER

CAUTION

: Cases in which, if handled incorrectly, a dangerous situation may occur, resulting in
possible death or severe injury.
: Cases in which, if handled incorrectly, a dangerous situation may occur, resulting in
possible minor to medium injury to the body, or only mechanical failure.

However, depending on the situation, items marked with

CAUTION may result in major accidents.

Both of these items contain important safety information, so be sure to follow them closely.
Icons for prohibited items and required items are shown below:

: Indicates a prohibited item (item that cannot be performed). For example, when open flames are prohibited,
is shown.

: Indicates a required item (item that must be performed). For example, when grounding must be performed,
is shown.

1. Installation

CAUTION
• Use this product in an environment as described in the catalogue and this document.
If this product is used in an environment subject to high temperature, high humidity, excessive dust, corrosive
gases, vibration or shock, it may result in an electric shock, fire or malfunction.
• Installation this product according to the instructions in this manual.
If installation is not performed correctly, it may result in falling, malfunction, or an operational error of the unit.
• Never allow foreign objects such as wire chips to enter the unit.
They may cause a fire, malfunction, or failure.

2. Wiring

REQUIRED
• Always perform grounding (FE terminal).
If grounding is not performed, there is a risk of an electric shock or malfunction.

CAUTION
• Connect a power supply that meets the rating.
If a power supply that does not meet the rating is connected, it may result in a fire.
• Any wiring operation should only be performed by a qualified technician.
If wiring is performed incorrectly, it may result in a fire, failure, or electric shock.

3. Precautions When Using the Unit

DANGER
• Never touch the terminals while the power is on.
There is a risk of an electric shock.
• Configure the emergency stop circuit, interlock circuit and other related circuits external to the programmable
controller (referred to as the PLC in this document).
Otherwise, a failure in the PLC may damage the equipment or result in a serious accident.
Never interlock the unit with the external load via the relay drive power supply of the relay output module.

CAUTION
• Before performing program change, forced output, run, stop and other operations while the unit is in operation, be
sure to check the validity of the applicable operation and safety.
An operation error may damage the equipment or result in a serious accident.
• Be sure to power on the unit according to the designated power-on sequence.
Otherwise, an erroneous operation may damage the equipment or result in a serious accident.

4. Maintenance

DANGER
• Never connect the

and

of the battery in reverse. Also, never charge, disassemble, heat, place in fire, or

short circuit the battery.
There is a risk of an explosion or fire.

PROHIBITED
• Never disassemble or modify the unit.
These actions may result in a fire, malfunction, or failure.

CAUTION
• Be sure to turn off the power supply before removing or attaching the module/unit.
Otherwise, it may result in an electric shock, malfunction, or failure.

Revision History
No.
1

Description of Revision
Appendix-1 Instruction Support

Date of Revision

Manual Number

2000/11

NJI-350 (X)

2000/12

NJI-350A (X)

2003/10

NJI-350B (X)

FUN92 to 96 of H-4010 { -> ×.
Appendix-2 Task code H28
Corrected explanation of Timer counter number.
2

Postscript of battery error detection. (3.2 chapters item
number 26, 15 chapters (4) )
Correct a description of digital filter . (8.7 chapters)
Addition of appendix 3.

3

28 points expansion units added.
Analog expansion module added.
Circuit diagram added in chapter 3
FUN 5, TRNS/RECV command added in chapter 5.

Table of Contents
Chapter 1

Features ..................................................................................................................................... 1-1 to 1-2

Chapter 2

System Overview....................................................................................................................... 2-1 to 2-2

Chapter 3

Function and Performance Specifications ............................................................................... 3-1 to 3-14
3.1
3.2
3.3

Chapter 4

Product lineup and wiring ....................................................................................................... 4-1 to 4-18
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8

Chapter 5

Product lineup .......................................................................................................................... 4-1
10-Point Basic Unit.................................................................................................................. 4-3
14-Point Basic Unit.................................................................................................................. 4-4
23-Point and 28-Point Basic Unit ............................................................................................ 4-5
Expansion Unit......................................................................................................................... 4-6
Terminal Layout and Wiring.................................................................................................... 4-7
Weights and Power Consumption .......................................................................................... 4-16
Exterior Dimensions .............................................................................................................. 4-17

Instruction Specifications ...................................................................................................... 5-1 to 5-146
5.1
5.2
5.3

Chapter 6

General Specifications ............................................................................................................. 3-1
Function Specifications............................................................................................................ 3-2
Performance Specifications...................................................................................................... 3-6
3.3.1 Calculation Specifications ............................................................................................ 3-6
3.3.2 Input Specifications ...................................................................................................... 3-7
3.3.3 Output Specifications.................................................................................................... 3-8
3.3.4 High-Speed Counter Specifications ............................................................................ 3-12
3.3.5 PWM Output/Pulse Train Output Specifications........................................................ 3-12
3.3.6 Analogue Input Specifications .................................................................................... 3-12
3.3.7 Analogue Output Specifications ................................................................................. 3-13
3.3.8 Potentiometer Analogue Input Specifications............................................................. 3-14
3.3.9 Interrupt Input Specifications ..................................................................................... 3-14
3.3.10 Backup ........................................................................................................................ 3-14
3.3.11 Expansion ................................................................................................................... 3-14
3.3.12 Clock Function............................................................................................................ 3-15
3.3.13 Power Supply for Sensor ............................................................................................ 3-16

Instruction Classifications ........................................................................................................ 5-1
List of Instructions ................................................................................................................... 5-2
Instruction Specification Details ............................................................................................ 5-13

I/O Specifications...................................................................................................................... 6-1 to 6-6
6.1
6.2
6.3

I/O Assignment ........................................................................................................................ 6-2
External I/O Numbers .............................................................................................................. 6-3
Internal Output Numbers.......................................................................................................... 6-6

Chapter 7

Programming............................................................................................................................. 7-1 to 7-8
7.1
7.2
7.3
7.4

Chapter 8

High speed counter, PWM/Pulse train output and Analogue I/O............................................ 8-1 to 8-22
8.1

8.2

8.3

8.4

8.5

8.6
8.7
8.8
8.9
8.10
8.11

Chapter 9

Memory Size and Memory Assignment ................................................................................... 7-1
Programming Devices.............................................................................................................. 7-2
Programming Methods............................................................................................................. 7-3
Program Transfer ..................................................................................................................... 7-7

Input/Output Function.............................................................................................................. 8-1
8.1.1 Initial Setting for Input/Output Function ...................................................................... 8-1
8.1.2 Operation Mode............................................................................................................ 8-2
8.1.3 Input/Output Setting .................................................................................................... 8-3
8.1.4 Input/Output Setting (Mode 10) ................................................................................... 8-4
8.1.5 Special Output Operation in CPU STOP Status ........................................................... 8-5
8.1.6 Pulse / PWM Output adjustment................................................................................... 8-5
High-Speed Counter (Single-Phase) ........................................................................................ 8-6
8.2.1 Operation of Single-Phase Counter............................................................................... 8-6
8.2.2 Setting of Single-Phase Counter ................................................................................... 8-8
High-Speed Counter (Two-Phase Counter)............................................................................ 8-10
8.3.1 Operation of the Two-Phase Counters ........................................................................ 8-10
8.3.2 Setting of Two-Phase Counter .................................................................................... 8-13
PWM Output.......................................................................................................................... 8-15
8.4.1 Operation of PWM Output ......................................................................................... 8-15
8.4.2 Setting of PWM Output .............................................................................................. 8-16
Pulse Train Output ................................................................................................................. 8-18
8.5.1 Operation of Pulse Output .......................................................................................... 8-18
8.5.2 Setting of Pulse Output ............................................................................................... 8-19
Interrupt Input ........................................................................................................................ 8-21
Digital Filter........................................................................................................................... 8-21
Potentiometers........................................................................................................................ 8-22
Analogue Input....................................................................................................................... 8-23
Analogue Output .................................................................................................................... 8-23
Analogue Expansion unit ....................................................................................................... 8-24

PLC Operation ........................................................................................................................ 9-1 to 9-12
9.1

9.2
9.3
9.4
9.5
9.6
9.7

RUN Start ................................................................................................................................ 9-2
9.1.1 Normal Scan ................................................................................................................. 9-3
9.1.2 Periodical Scan ............................................................................................................. 9-5
9.1.3 Interrupt scan ................................................................................................................ 9-6
9.1.4 Relationship of Each Scan Type ................................................................................... 9-8
Online Change in RUN ............................................................................................................ 9-9
Instantaneous Power Failure .................................................................................................. 9-10
Operation Parameter .............................................................................................................. 9-11
Test Operation........................................................................................................................ 9-12
Forced Set/Reset .................................................................................................................... 9-12
Forced Output ........................................................................................................................ 9-12

Chapter 10

PLC Installation, Mounting, Wiring...................................................................................... 10-1 to 10-8
10.1
10.2

Chapter 11

Communication Specifications............................................................................................ 11-1 to 11-10
11.1
11.2
11.3
11.4
11.5

11.6

Chapter 12

Port function .......................................................................................................................... 11-1
Port 1...................................................................................................................................... 11-1
Port 2...................................................................................................................................... 11-3
General purpose port (Port 1,2) ............................................................................................. 11-4
Modem Control Function....................................................................................................... 11-5
11.5.1 Configuration.............................................................................................................. 11-5
11.5.2 AT Commands............................................................................................................ 11-5
Connecting to the Ports .......................................................................................................... 11-8
11.6.1 Port 1 .......................................................................................................................... 11-8
11.6.2 Port 2 .......................................................................................................................... 11-9

Error Code List and Special Internal Outputs ..................................................................... 12-1 to 12-14
12.1
12.2
12.3
12.4
12.5

Chapter 13

Installation ............................................................................................................................. 10-1
Wiring .................................................................................................................................... 10-3

Error Codes............................................................................................................................ 12-1
Syntax and Assembler Error Codes........................................................................................ 12-3
Operation Error Codes ........................................................................................................... 12-4
Bit Special Internal Output Area............................................................................................ 12-5
Word Special Internal Output Area........................................................................................ 12-9

Troubleshooting .................................................................................................................. 13-1 to 13-16
13.1
13.2
13.3

Error Display and Actions...................................................................................................... 13-1
Checklist when Abnormality Occurred .................................................................................. 13-5
Procedures to Solve Abnormality .......................................................................................... 13-6

Chapter 14

Operation Examples ............................................................................................................ 14-1 to 14-16

Chapter 15

Daily and Periodic Inspections.............................................................................................. 15-1 to 15-2

Appendix 1

H-Series Instruction Support Comparison Chart .................................................................................A-1

Appendix 2

Standards...........................................................................................................................................A-11

MEMO

Chapter 1 Features

Chapter 1

Features

1.

Multifunctional all-in-one type PLC
The MICRO-EH is a multifunctional all-in-one type PLC that contains all necessary parts—a power supply and
CPU parts as well as I/O units--within one unit.
Three sizes of PLCs are available: 10, 14, and 28 points. A type with 23 points plus three points of analog I/O
having the same size as the 28-point PLC is also available. Moreover, for PLCs with more than 14 points, it is
possible to install additional 14 or 28 point expansion units up to four units. Thus, the MICRO-EH can control a
wide range of systems from small to medium size.

2.

Simplified positioning by counter inputs and pulse train outputs
The function of inputs/outputs can be selected from four modes. By selecting a mode, inputs/outputs that are used as
normal inputs/outputs can be set as counter inputs and pulse train outputs. Through a combination of these special
inputs/outputs, it is possible to control positioning without using special modules.

3.

Simplified instrument system by analog integration
For the 23-point PLC, there are two points of analog input and one point of analog output for which both current
and voltage can be selected. High performance analog channels, with a resolution of 12 bits and an overall accuracy
of ±1 % or less, can be used without requiring special settings of the channels; thus, a simplified instrument system
can easily be implemented.

4.

Superior upward compatibility
The MICRO-EH has been developed as a part of the EH/H series family.
Debugging and programming can be performed using the same concept as for the EH/H series.
In addition, the MICRO-EH software property can effectively be applied to the EH/H series for future system
expansion.

5.

Easy maintenance through removable terminal blocks and installation on a DIN rail
All models of the MICRO-EH series support the DIN rail so that the PLC can easily be mounted and dismounted. In
addition, the I/O section of the 14-point PLC or more utilizes a removable terminal block. Thus, erroneous and
faulty wiring that may occur when connecting to external devices can be reduced.

6.

Remote maintenance through modem connection
Communication with remote sites can be performed via dial-up line by connecting a modem to port 1 on the 14point PLC or more of the MICRO-EH series. It is possible to monitor and manage remote systems from an office or
monitor room.

7.

Easily adjustable potentiometer
The 14-point PLC or more of the MICRO-EH series supports two potentiometers.
By using these potentiometers, it is possible to rewrite internal output values in real-time by one driver without using
peripheral devices. Since the resolution of the potentiometer is 10 bits, it is possible to set any value from 0 to 3FFH.
To obtain stable analog values of the potentiometers, it is possible to sample 1 to 40 analog values of the
potentiometers and average them.

8.

Maintaining programs without a battery
It is possible to retain user programs in case of out-of battery or no battery, since FLASH memory is used as the
backup memory for the user programs. However, a battery is necessary for data memory backup. (See the Notes in
Chapter 7.1 for a list of precautionary details.)

9.

Support for various programming languages
The MICRO-EH supports “Pro-H,” the programming software that allows creating programs in five programming
languages regulated in IEC1131-3. This means that customers who have learned languages other than Ladder can
easily create programs with this programming software.

10. Compliant with overseas specifications as standard
All types of MICRO-EH PLCs have obtained the CE mark, C-TICK and UL. Therefore, systems in which these
PLCs are installed can be exported without requiring any modification.

1-1

Chapter 1 Features

MEMO

1-2

Chapter 2 System Overview

Chapter 2

System Overview

This chapter describes the system configuration of the MICRO-EH.
The MICRO-EH is an all-in-one type programmable controller, and has the following system configuration.

1] Basic unit

Figure 2.1 10-point type system configuration diagram

1] Basic unit

2] Expansion unit

3] Expansion cable

2] Expansion unit

3] Expansion cable

2] Expansion unit

3] Expansion cable

3] Expansion cable

Figure 2.2 14-point type system configuration diagram

2-1

2] Expansion unit

Chapter 2 System Overview

[1] Basic unit

[2] Expansion unit

[3] Expansion cable

[2] Expansion unit

[3] Expansion cable

[2] Expansion unit

[3] Expansion cable

[2] Expansion unit

[3] Expansion cable

Figure 2.3 23,28-point type system configuration diagram
No restriction for combination of 14,23,28 points, and basic/expansion unit.
14 points basic unit can handle any type of expansion units, and 23/28 points basic unit as well.

No.
1]
2]
3]

Device name
Basic unit
Expansion unit
Expansion cable

Description
Calculates, imports inputs, and controls outputs according to the contents of user programs.
14 points digital unit, 4 in/2 out analog unit
Cable for connecting the basic unit and expansion unit, or between expansion units.

2-2

Chapter 3 Function and Performance Specifications

Chapter 3
3.1

Function and Performance
Specifications

General Specifications

Item
Power supply type
Power voltage

Specification
AC
100/110/120 V AC (50/60 Hz),
200/220/240 V AC (50/60 Hz)
85 to 264 V AC wide range

DC
24 V DC

Power voltage fluctuation
19.2 to 30 V DC
range
Current consumption
Please refer to 4.7, “Weights and Power Consumption.”
Allowable momentary power 85 to 100 V AC: For a momentary power 19.2 to 30 V DC: For a momentary power
failure of less than 10 ms,
failure
failure of less than 10 ms,
operation continues
operation continues
100 to 264 V AC: For a momentary power
failure of less than 20 ms,
operation continues
Operating ambient temp.
0 to 55 °C
Storage ambient temp.
-10 to 75 °C
Operating ambient humidity
5 to 95 % RH (no condensation)
Storage ambient humidity
5 to 95 % RH (no condensation)
Vibration proof
Conforms to JIS C 0911
Noise resistance
{ Noise voltage 1,500 Vpp Noise pulse width 100 ns, 1 µs
(Noise created by the noise simulator is applied across the power supply module's input
terminals. This is determined by our measuring method.)
{ Based on NEMA ICS 3-304
{ Static noise: 3,000 V at metal exposed area
{ Conforms with EN50081-2 and EN50082-2
Supported standards
Conforms with UL, CE markings and C-TICK
Insulation resistance
20 MΩ or more between the AC external terminal and the protection earth (PE) terminal (based
on 500 V DC mega)
Dielectric withstand voltage
1,500 V AC for one minute between the AC external terminal and the protection earth (PE)
terminal
Grounding
Class D dedicated grounding (grounded by a power supply module)
Environment used
No corrosive gases and no excessive dirt
Structure
Attached on an open wall
Cooling
Natural air cooling

3-1

Chapter 3 Function and Performance Specifications

3.2

Function Specifications
The functions available in the MICRO-EH are described in the table below.

No.
1

2

3

4

Item
Basic functions

Description
The following functions can be executed when constructing a system using the PLC.
1] An input signal is received from the control object, operations are performed according to
the contents of the program created by the user and the results are output as an output signal.
Also, operation results and progress information can be retained in the internal output area.
2] Power is supplied to the main module, system starts to run, and the operation described
above is performed continuously until the power is shut down or the system stops running.
3] The information retained internally can be extracted by a device connected externally or can
be set in other information. Also, this information is initialized at the time the system starts
running, but it can also be retained depending on the user settings.
4] Operating status can be confirmed with the LED display of each unit or with an external
device that has been connected.
Setting and display
The following have been provided for the user to set or confirm various types of operation
status:
1] DIP switch (basic unit)
This specifies the CPU communication function setting and operation mode, etc. (except for
10-point type)
2] RUN switch (basic unit)
It can instruct to run and stop. (external input for 10-point type)
3] LED display (basic unit and expansion unit)
Indicates the power system status, operating status and I/O operation status.
4] Communication connector (basic unit)
This can connect external devices using RS-232C, RS-485, RS-422. (only the 23-point and
28-point types with RS-485, RS-422)
5] Expansion connector (basic unit and expansion unit)
This allows installation of additional input/output. (except for 10-point type)
6] Terminal block (basic unit and expansion unit)
This performs the connections for supplying power, and for handling signals with the
control object.
Number of I/O points The number of points that can be controlled with respect to the control object is as follows:
1] External inputs/outputs
The number of points that can be use for external inputs/outputs differs depending on the
basic unit. The 10-point type cannot expand the inputs/outputs. For the 14-point, 23-point
and 28-point types, a maximum of 4 expansion units can be connected. The I/O numbers for
inputs are indicated by X, WX, DX and outputs are indicated by Y, WY, DY.
2] Internal outputs
These are areas for temporarily storing information. The I/O numbers include M, WM, DM,
R, WR, DR.
3] A timer counter is provided internally.
4] Array (corresponding to a substitution statement only)
An array of I/O numbers can be expressed by enclosing by parentheses.
User program
The program in which the control contents have been described can be stored. This FLASH
memory
memory resides in the basic unit.
1] The contents of this memory will be maintained even if the power is shut off. Because of
this, it is necessary to initialize the memory since it may have undefined after the unit is
purchased.
2] Programming is done using peripheral units such as programming software (LADDER
EDITOR) for the H-series programmable controllers.
3] The instructions that can be used are those designated by the H-series ladder. See the list of
instructions for details.
4] A battery is not required to retain the contents of the user program. Always save the created
programs to a floppy disk just in case an unexpected problem occurs.

3-2

Chapter 3 Function and Performance Specifications

No.
5

6

7

8

Item
Control method

Description
With the PLC, the user programs are converted in batch at operation startup, and the programs
after conversion will be executed in order as they are read one by one.
1] The method used for data I/O is that after the I/O data (information) is scanned (execution
from the head of the program to the end), it is updated in group. If refresh of external I/O is
required during scanning (refresh method), use the refresh instruction.
2] Apart from the program that will be normally executed, a periodic scan program which
interrupts the normal program at a fixed time intervals and is executed, can be created. The
time intervals are 10 ms, 20 ms and 40 ms.
3] The user programs are executed from the head of the program to the end, and are once again
repeated after performing the system processing that updates the lapsed timer value,
refreshes I/O, and performs communication with peripheral units.
Run/stop control
Running and stopping the PLC is normally performed by the user.
1] Turn on the RUN switch to start operation for the 14-point type or higher. Turn this switch
off to stop operation.
For the 10-point type, turn on the RUN input terminal to start operation. Turn it off to stop
operation.
2] The start and stop operations can be performed with designated external inputs or internal
outputs by designating the operation control inputs with a programming unit.
3] Apart from the operation described above, if a malfunction is detected in the system while it
is running, operation stops and the outputs are aborted (OFF).
4] If the power is shut off and then turned back on while the system is running, operation starts.
When the power shuts off, turn off the power to the PLC, then shut off the external input
power. When turning the power back on, turn on the external input power before turning on
the power to the PLC.
5] When starting operation, do so after clearing internal information which is not designated
for storage during power failure. When stopping operation, leave the internal information as
is, turn off the outputs and then stop the operation.
6] When the power has been cut off for longer than the time allowed for the momentary power
failure, then depending on the system load status, either operation continues or the system
perceives that a power shut off has occurred and restarts operation. To resume operation
securely, have the power remain off for 1 minute or longer.
Operation parameters Each type of condition for operating the PLC can be set. The possible settings for operation
when an error occurs are provided below.
1] Operation may be continued when I/O information does not match.
2] Overload check time can be set. The initial value is 100 ms and the module stops when the
time for one scan takes longer than the set overload check time. (overload error)
3] Operation may be continued when an overload error occurs.
4] When a power failure (power shutoff) occurs, the internal output area for retaining
information and the timer counter range can be designated.
And, the setting below is possible.
1] The name of the user program can be registered.
2] A password can be set up so that the third party cannot reference the program.
3] It is necessary to register the type of I/O module used as an I/O assignment table. In order to
create this I/O assignment table, the types of I/O modules that are connected can be read.
Change while in
A part of a program can be modified during operation.
operation
1] If a modification is made with a programming unit and a change is performed while in
operation, the user program in the CPU is changed and the altered program is switched
internally at the end of scanning, and operation continues with the new program.
2] When a control instruction is included in the modification to the program, make the changes
after first performing the control instruction change procedure in the programming unit to
check for safety.
3] Until operation starts to continue with the new program, a pause [halt period] occurs when
the module does not run. External input information is not being received during this time,
so leave a sufficient time for executing a change while in operation.

3-3

Chapter 3 Function and Performance Specifications

No.
9
10
11

12

13
14

15

16

17

18
19

Item
Forced set/reset

Description
Forced set and forced reset of the designated I/O can be performed from the programming unit
connected to the CPU module.
Forced output
Output can be forced with respect to the designated I/O number from the programming unit
connected to the CPU module. For I/O that is not designated, outputs are shut off.
23-point and 28-point types have the calendar clock function.
Calendar clock
1] The year, month, date, day of the week, hour, minute and second can be set.
function
(only for 23- and 28- 2] There is a function for making adjustments in 30-second units.
3] When a battery is not installed, the calendar clock information is not retained when power
point types)
goes off. The calendar clock must be reset. (The battery is an optional. Purchase separately.)
Dedicated port
This is a communication port with dedicated protocol for the H-series. The communication
command called the task code is defined in the port.
1] A programming unit can be connected. (However, the command language programmer
PGM-CHH and the portable graph programmer PGM-GPH cannot be used.)
2] Port 1 and port 2 can be used as dedicated ports. Transmission speed, etc. can be switched
using the DIP switch. (Port 2 is supported only by the 23-point and 28-point type models.)
General purpose port General purpose port function is supported from software version H0130 (WRF051=H0130) or
newer. This function enables serial communication to any standard devices like bar code reader
by using TRNS/RECV command in user program.
Modem control
A modem can be used to connect externally. It becomes operable when data receives from the
external media, and task code communication can afterward be performed.
Port 1 can be assigned for this function by switching the DIP switch. (The 10-point type is not
supported.)
Self-diagnosis
Self-diagnostic tests for the following items are performed:
1] Microcomputer check
2] System program area check
3] Memory check
4] User program check
5] Internal output area check
6] Mounted I/O check
Abnormal handling
When a problem occurs, the error code that indicates the error description is output to special
internal output WRF000 as a hexadecimal value. Also, errors are notified to the external devices
through the OK LED. If the error level is high, the CPU stops operation, but depending on the
error, the operation may be continued using the user settings.
If multiple errors occur, the error code with higher error severity is set. The detailed information
is also set to the special internal output. Also, this information is always recorded in the power
failure memory, so the information can be referenced even after the power is cut off. (However,
a battery is required.) The clearing of the error information can be conducted by turning on
R7EC.
Task code
By combining individual task codes, the following functions can be achieved by the programs in
the host computer:
1] CPU control (RUN/STOP control of CPU, occupy/release, CPU status read, etc.)
2] I/O control (various types of monitoring)
3] Memory write (all clear, batch transfer, etc.)
4] Memory read (reading of programs, etc.)
5] Response (various responses from CPU)
Instruction
Programming can be performed for various purposes and usage by combining Ladder and the
instruction language.
High-speed counter
The external input of the basic unit can be used as a high-speed counter by specifying it as a
counter input. The following can be set.
1] Single-phase counter, 2 channels
2] Single-phase counter, 4 channels (For the 10-point type, it is single-phase, 3 channels.)
3] Two-phase counter 1 channel, single-phase counter 1 channel (For the 10-point type, it is
two-phase, 1 channel.)
The functions include a count operation (up/down, leading/trailing), coincidence output control,
preset by preloaded input, and count value reading by strobe input.

3-4

Chapter 3 Function and Performance Specifications

No.
20

Item
Interrupt input

21

PWM output

22

Pulse train output

23

Analogue input

24

Analogue output

25

Potentiometer

26

Battery

Note:

Description
The external input of the basic unit can be specified for interrupt input. With the interrupt input,
the corresponding interrupt program can be executed.
The external output of the basic unit can be specified for pulse width modulated output. In this
case, pulses are output at the specified frequency with a duty between 0 and 100 %. A maximum
of 4 points, including the pulse array output, can be set.
The external output of the basic unit can be specified for pulse output. In this case, pulses are
output at the specified frequency with a duty between 30 and 70 %. A maximum of four points,
including the pulse output, can be set.
The analogue input function is available in the 23-point type and analog exp. unit. The
resolution is 12 bits and it can be used by either selecting a current input between 0 and 20 mA
or a voltage input between 0 and 10 V.
The analogue output function is available in the 23-point type and analog exp. unit. The
resolution is 12 bits and it can be used by either selecting a current output between 0 and 20 mA
or a voltage output between 0 and 10 V.
14-point, 23-point, and 28-point types have two potentiometers, with which setting values etc.
can be changed without using the programming units.
A dedicated battery can be installed in the 23-point and 28-point types so that data in the data
memory can be maintained even when the power supply to the main unit is shut off. In addition,
the data of the calendar clock in the 23-point and 28-poins types can be maintained. The battery
is an optional (model EH-MBAT).
Please refer to Chapter 15 (4) Life of the battery.

There are functions supported by H series that are not supported by this PLC (debug, trace, force, and simulation functions).

3-5

Chapter 3 Function and Performance Specifications

3.3

Performance Specifications
3.3.1

Calculation Specifications

The calculation specifications of the PLC are described below.
Model

Name
Type

Control
CPU
specifications Processing system
Processing Basic instructions
speed
Application instructions
User program memory
Operation
Instruction Basic instructions
processing
language
specifications
Arithmetic instructions
Application instructions
Ladder
Basic instructions
Arithmetic instructions
Application instructions
External
I/O
I/O processing system
I/O
processing
Maximum number of
specifications
points
Internal
Bit
output
Word
Special Bit
Word
Bit/word shared
Timer
Number of points
counter
Timer set value
Counter set value
Edge detection
Peripheral
equipment

Program system
Peripheral unit

Maintenance
functions

Self-diagnosis

*1:
*2:

10-point type
EH-D10DT
EH-D10DTP
EH-D10DR

14-point type
EH-D14DT
EH-D14DTP
EH-A14DR
EH-D14DR
EH-A14AS

23/28-point type
EH-D28DT
EH-A23DRP
EH-D28DTP
EH-A23DRT
EH-A28DRP
EH-D23DRP
EH-A28DRT
EH-A28DR
EH-D28DRP
EH-D28DRT
EH-D28DR
EH-A28AS
32-bit RISC processor
Stored program cyclic system
0.9 µs / instruction
Several 10 µs / instruction
3 k steps max. (FLASH memory)
39 types such as LD, LDI, AND, ANI, OR, ORI, ANB, ORB, OUT, MPS,
MRD, MPP, etc.
62 types (arithmetic, application, control, FUN command etc.)
39 types, such as

62 types (arithmetic, application, control, FUN command etc.)
Refresh processing
10 points

126 points

135 points

140 points

1,984 points (R0 to R7BF)
4,096 words (WR0 to WRFFF)
64 points (R7C0 to R7FF)
512 words (WRF000 to WRF1FF)
16,384 points, 1,024 words (M0 to M3FFF, WM0 to WM3FF)
256 points (TD + CU) *1
0 to 65,535, timer base 0.01 s, 0.1 s, 1 s (0.01s has maximum 64 points *2)
1 to 65,535 times
512 points (DIF0 to DIF511: Decimal)
+ 512 points (DFN0 to DFN511: Decimal)
Instruction language, ladder diagram
Programming software
(LADDER EDITOR DOS version/Windows® version, Pro-H)
Instruction language programmer and form graphic display programmer cannot
be used.
PLC error (LED display): Microcomputer error, watchdog timer error, memory
error, program error, system ROM/RAM error, scan time monitoring, battery
voltage low detection, etc.

The same numbers cannot be used with the timer counter.
Only timers numbered 0 to 63 can use 0.01 s for their timer base.

3-6

Chapter 3 Function and Performance Specifications

3.3.2

Input Specifications

The input circuit consists of DC input and AC input, with the following specifications.

(1) DC input
Specification
24 V DC
0 to 30 V DC
Approx. 2.8 kΩ
7.5 mA typical
15 V DC (min) / 4.5 mA (max)
5 V DC (max) / 1.5 mA (max)
Basic unit : 0.5 to 20 ms (configurable)
Exp. unit : 0.5 ms or less
Basic unit : 0.5 to 20 ms (configurable)
ON → OFF
Exp. unit : 0.5 ms or less
See Chapter 4
Number of input points
See Chapter 4
Number of common
Polarity
None
Insulation system
Photocoupler insulation
Input display
LED (green)
External connection
10-point type: fixed type terminal block
14-, 23-, 28-point types: Removable type
screw terminal block (M3)
*1: Common terminals are separated each other.

Circuit diagram

0
1

C

Internal circuit

Item
Input voltage
Allowable input voltage range
Input impedance
Input current
Operating
ON voltage
voltage
OFF voltage
Input lag
OFF → ON

(2) AC input
Item
Input voltage
Allowable input voltage range

3-7

Internal circuit

Specification
Circuit diagram
100 to 120 V AC
85 to 132 V AC
50 -5 % to 60 +5 % Hz
Input impedance
Approx. 14.6 kΩ (60 Hz)
Approx. 17.6 kΩ (50 Hz)
0
Input current
Approx. 7 mA RMS (100 V AC/60 Hz)
Operating
ON voltage
80 V AC (min.) 4.5 mA
1
voltage
OFF voltage
30 V AC (max.) 2 mA
25 ms (max.) *1
Input lag
OFF → ON
30 ms (max.) *1
ON → OFF
C
Number of input points
See Chapter 4.
Number of common
See Chapter 4.
Polarity
None
Insulation system
Photocoupler insulation
Input display
LED (green)
External connection
14-, 28-point types: Removable type screw
terminal block (M3)
*1: Delay by hardware only. Delay by digital filter (software filter) 0.5 to 20 ms is not included.
*2: Common terminals are separated each other.

Chapter 3 Function and Performance Specifications

3.3.3

Output Specifications

(1) DC output
(Y100 of EH-*23DRP/A23DRT/*28DRP/*28DRT)
Item
Type

Specification
EH-A23DRT

Y100 output specifications

EH-*28DRT

EH-*28DRP

Transistor output

Transistor output

(sink type)

(source type)

24 / 12 / 5 V DC
24 V DC +20 %, -80 %

Minimum switching current
Leak current
Maximum

1 mA
0.1 mA (max)

1 circuit

load current

Circuit diagram
Sink type (23/28DRT)
0

Internal circuit

Rated load voltage

EH-*23DRP

C0

0.75 A 24 V DC
0.5 A 12 V DC
0.25 A 5 V DC

1 common

0.75 A

OFF → ON

0.1 ms (max) 24 V DC 0.2 A

response time ON → OFF

0.1 ms (max) 24 V DC 0.2 A

Output

Number of output points

1
None

Fuse

None

External connection
External power supply *1

Photocoupler insulation
LED (green)
Removable type screw terminal block (M3)
Not necessary

Internal circuit

Surge removing circuit

Output display

V0

1

Number of common

Insulation system

Source type (23/28DRP)

30 to 16 V DC

to V terminal
Insulation

1500 V or more (external-internal)
500 V or more (external-external)

Output voltage drop
0.3 V DC (max)
*1: It is necessary to supply 16 to 30 V DC between the V and C terminals externally for the source type.
The sink type operates by load power supply only. See “4.6 Terminal Layout and Wiring” for the details.

3-8

0

C0

Chapter 3 Function and Performance Specifications

(2) DC output: LCDC-Low Current
(All points of EH-D10DT/DTP, Y102-Y105 of EH-D14DT/DTP, Y102-Y109 of EH-D28DT/DTP,
Y*018-Y*021 of EH-D14EDT/D14EDTP)
Circuit diagram
Item
Specification
Output specification
Rated load voltage

1 mA

Leak current

0.1 mA (max)
0.75 A 24 V DC
0.5 A 12 V DC

1 common

3A
0.1 ms (max) 24 V DC 0.2A
0.1 ms (max) 24 V DC 0.2A

Number of output points

See Chapter 4.

Number of common

See Chapter 4.

Surge removing circuit

None

Fuse

None

Insulation system

Removable type screw terminal block (M3)
30 to 12 V DC
1500 V or more (external-internal)
500 V or more (external-external)

Output voltage drop

V0

0

Internal circuit

Insulation

C0

Source type (EH-D**DTP)

LED (green)

Externally supplied power *1

0

Photocoupler insulation

Output display
External connection

Internal circuit

1 circuit

Output
OFF → ON
response time ON → OFF

*1:

V0

24/12 V DC (+10 %, -15 %)

Minimum switching current
Maximum
load current

Sink type (EH-D**DT)

Transistor output

C0

0.3 V DC (max)

It is necessary to supply 12 to 30 V DC between the V and C terminals externally. See “4.6 Terminal Layout and Wiring.”

(3) DC output: HCDC-High Current
(Y100,Y101 of EH-D14DT/DTP, Y100, Y101, Y110, and Y111 of EH-D28DT/DTP,
Y*016, Y*017 of EH-D14EDT/D14EDTP)
Item
Output specification
Rated load voltage
Minimum switching current
Leak current

Transistor output

V0

1 mA
0.1 mA (max)

1 circuit
1 common

Output
OFF → ON
response time ON → OFF

1A 24 V DC
3A
0.1 ms (max) 24 V DC 0.2A
0.1 ms (max) 24 V DC 0.2A

Number of output points

See Chapter 4.

Number of common

See Chapter 4.

Surge removing circuit

None

Fuse

None

Insulation system
Output display
Externally supplied power *1
Insulation
Output voltage drop

Source type (EH-D**DTP)

0

C0

V0

Photocoupler insulation
LED (green)
Removable type screw terminal block (M3)
30 to 12 V DC
1500 V or more (external-internal)
500 V or more (external-external)

Internal circuit

External connection

*1:

Sink type (EH-D**DT)

24/12 V DC (+10 %, -15 %)

Internal circuit

Maximum
load current

Circuit diagram

Specification

0

C0

0.3 V DC (max)

It is necessary to supply 12 to 30 V DC between the V and C terminals externally. See “4.6 Terminal Layout and Wiring.”

3-9

Chapter 3 Function and Performance Specifications

(4) DC output (ESCP type): HCDC-High Current
(Y100,Y101 of EH-D14DTPS, Y100-Y103 of D28DTPS)
Y*016,Y*017 of EH-EDTPS, Y*016-Y*019 of EH-D28EDTPS)
Item
Output specification
Rated load voltage
Minimum switching current
Leak current
Maximum
load current

24/12 V DC (+10 %, -15 %)
10 mA
0.1 mA (max)

1 circuit

1A

1 common

3A
0.05 ms (max) 24 V DC 0.2A
See Chapter 4.

Number of common

See Chapter 4.

Surge removing circuit

None

Fuse

None

Output display

V0

0.05 ms (max) 24 V DC 0.2A

Number of output points

Insulation system

Source type (EH-D**DTPS)

Internal circuit

Output
OFF → ON
response time ON → OFF

0

Photocoupler insulation

C0

LED (green)

External connection
Externally supplied power *1
Insulation

Removable type screw terminal block (M3)
30 to 12 V DC
1500 V or more (external-internal)
500 V or more (external-external)

Output voltage drop
*1:

Circuit diagram

Specification
Transistor output

0.3 V DC (max)

It is necessary to supply 12 to 30 V DC between the V and C terminals externally. See “4.6 Terminal Layout and Wiring.”

(5) DC output (ESCP type): LCDC-Low Current
(Y102-Y105 of EH-D14DTPS, Y104-Y111 of EH-D28DTPS
Y*018-Y*021 of EH-D14EDTPS, Y*020-Y*027 of EH-D28EDTPS)
Item
Output specification
Rated load voltage
Minimum switching current
Leak current
Maximum
load current

Transistor output
24/12 V DC (+10 %, -15 %)
10 mA
0.1 mA (max)

1 circuit
1 common

0.5 ms (max) 24 V DC 0.2A
0.5 ms (max) 24 V DC 0.2A
See Chapter 4.

Number of common

See Chapter 4.

Surge removing circuit

None

Fuse

None

Output display
External connection
Externally supplied power *1
Insulation
Output voltage drop

V0

3A

Number of output points

Insulation system

Source type (EH-D**DTPS)

0.7 A

Photocoupler insulation

Internal circuit

Output
OFF → ON
response time ON → OFF

*1:

Circuit diagram

Specification

0

C0

LED (green)
Removable type screw terminal block (M3)
30 to 12 V DC
1500 V or more (external-internal)
500 V or more (external-external)
0.3 V DC (max)

It is necessary to supply 12 to 30 V DC between the V and C terminals externally. See “4.6 Terminal Layout and Wiring.”

3-10

Chapter 3 Function and Performance Specifications

(6) Relay output
Specification
5 to 250 V AC, 5 to 30 V DC
1 mA
2 A (24 V DC, 240 V AC)
5A
15 ms (max)
15 ms (max)
See Chapter 4.
See Chapter 4.
None
None
Relay insulation
LED (green)
Removable type screw terminal block (M3)
Not necessary

Circuit diagram

0
1

Internal circuit

Item
Rated load voltage
Minimum switching current
Maximum
1 circuit
load current 1 common
Output
OFF → ON
response time ON → OFF
Number of output points
Number of common
Surge removing circuit
Fuse
Insulation system
Output display
External connection
Externally supplied power
(for driving the relays)
Contact life *1

C

20,000,000 times (mechanical)
200,000 times (electrical: 2 A)
Insulation
1500 V or more (external-internal)
500 V or more (external-external)
*1: Refer to the Life curve of relay contacts in Chapter 10 for the details.

(7) AC output (SSR)
Item
Output specification
Rated voltage
Output voltage

Internal circuit

Specification
Circuit diagram
Triac output
100/240 V AC
100 –15 % to 240 +10 % V AC
50 –5 % to 60 +5 % Hz
Maximum
1 circuit
0.5 A 240 V AC
load current 1 common
2A
Minimum load current
100 mA
Maximum leakage current
1.8 mA 115 V AC(max)
3.5 mA 230 V AC(max)
Maximum inrush current
5 A (at 1 cycle or less)/point
10 A (at 1 cycle or less)/common
1 ms or less
Maximum
Off → On
delay time
1
ms
+
1/2 cycle or less
On → Off
Output common
See Chapter 4.
Polarity
See Chapter 4.
Insulation system
Phototriac insulation
Fuse *2
Used
Surge removing circuit
Sunabar circuit + varistor
External connection
Removable terminal block
Voltage drop
1.5 V RMS (max)
Insulation
1500 V or more (external-internal)
500 V or more (external-external)
*2: It is necessary to repair the module if the load short-circuits and causes the fuse to melt.
Note that the fuse cannot be replaced by users.

3-11

0
1

C

Chapter 3 Function and Performance Specifications

3.3.4

High-Speed Counter Specifications

Available input
Input voltage

Single phase
X0, X2, X4, X6

Two phase
X0 and X2 in pair

15 V
5V
Count pulse width
100 µs
Maximum count frequency
10 kHz each channel
Count register
16 bits
Coincidence output
Allowed
On/Off-preset
Allowed
Upper/lower limit setting
Not allowed
Preload/strobe
Allowed
Since 10 points type does not have input X6, counter channel is up to 3 ch.

3.3.5

ON
OFF

PWM Output/Pulse Train Output Specifications
23-point and 28-point type
Relay Output
Y100 (optional)
5/12/24 V

*1:

10/14/28-point
Transistor Output
Y100-Y103 (optional)
12/24 V

Available outputs
Load voltage
Minimum load current
1 mA
PWM max. output frequency *1
2 kHz total channels
Pulse train max. output frequency *1
5 kHz total channels
Pulse acceleration/deceleration
By FUN 151.
Relay outputs cannot keep up with high frequencies; these outputs should be used at the operating frequency upon confirmation.

3.3.6

Analogue Input Specifications

Module type
Input channel
Input range

Resolution
Accuracy
Linearity
Current input impedance
Voltage input impedance
Input delay time
Channel to internal circuit insulation
Channel-to-channel insulation

23 points module
WX30, WX31

Analog exp. unit
WX u01 - WX u04
(u : unit number)
0-10 V (10.24V max.)
0-10V (10.24V max.)
-10 to +10V (±10.24V max.)
0-20 mA (20.48 mA max.)
0-20 mA (20.48 mA max.)
4-20 mA (20.38 mA max.)
12 bits
±1 % of full scale
Max. +/-3 units
Approx. 249 Ω
Approx. 100 kΩ
Approx. 200 kΩ
20 ms
Not insulated
Insulated
Not insulated

3-12

Chapter 3 Function and Performance Specifications

Circuit diagram (23 points type)

Circuit diagram (Analog expansion unit)

IN2JP

IN4JP

IN2+

IN4+

IN2IN1JP

IN4IN1JP

IN1+

IN1+
Voltage

Voltage
IN1-

3.3.7

Internal circuit

Current

Internal circuit

Current

IN1-

Analogue Output Specifications

Module type
Output channel

23 points type module
WY40

Analog exp. unit
WY u06, WY u07
(u : unit number)
0-10V (10.24V max.)
0-10V (10.24V max.)
0-20mA (20.48mA max.)
0-20mA (20.48mA max.)
4-20mA (20.38mA max.)
12 bits
±1 % of full scale

Output range

Resolution
Accuracy
Current output
Allowable load
Output allowable capacity
Output allowable inductance
Voltage output
Allowable load
Output allowable impedance

10 to 500 Ω
Maximum 2000 pF
Maximum 1 H
Maximum 10 kΩ
Maximum 1 µF

Circuit diagram (23 points type)

Circuit diagram (Analog expansion unit)
VO7

Voltage

IO7
Internal circuit

Internal circuit

VO
VC
IO

Voltage

Current

OC7

VO6

IC
IO6
OC6

3-13

Current

Chapter 3 Function and Performance Specifications

3.3.8

Potentiometer Analogue Input Specifications

Number of potentiometer inputs
Stored in
Input range
Resolution
Input filter

3.3.9

2
Ch.1 : WRF03E, Ch.2 WRF03F
0-1023 (H0-H3FF)
10 bits
By user settings

Interrupt Input Specifications

Input that can be used
Input voltage
ON
OFF

X1, X3, X5, X7 (by user settings)
15 V
5V

3.3.10 Backup
(1)

Battery
Data memory (retentive area) can be kept by EH-MBAT battery as below.
Battery life time (total power off time) [Hr] *
Guaranteed value (Min.) @55°C

Actual value (Max.) @25°C

9,000

18,000

* Battery life time has been changed since Oct. 2002 production (MFG NO.02Jxx) due to hardware modification.
Battery can be mounted inside of front cover.
Battery is available only for 23-point and 28-point types.
If the calendar clock function is used with the 23-point or 28-point type, be sure to use the battery.
(2)

Capacitor
14-point type: Data can be kept for 72 hours (at 25 °C) by the capacitor.
23 and 28-point types: Data can be kept for 24 hours (at 25 °C) by the capacitor.
Please note that data memory of 10 point type cannot be retained.

3.3.11 Expansion
•
•
•
•
•

Up to 4 times of expansion units can be installed.
14 points and 28 points digital units, and 4ch. input / 2 ch. output analog expansion units available.
A cable with a length of up to 1 m can be used to connect between units.
The total extension cable length can be up to 2 m (from the basic unit to the expansion unit at the end).
The 10-point type unit cannot be expanded.

3-14

Chapter 3 Function and Performance Specifications

3.3.12 Clock Function
23-point and 28-point types have calendar function. This can be operated either by internal output area or task code.
* 10-point and 14-point types do not have this function.
(1)

Reading the clock data
By turning on the read request (R7F8), the clock data is read out in the reading value area (WRF01B to WRF01F).

(2)

Writing the clock data
By turning on the write request (R7F9), the clock data stored in writing value area (WRF01B to WRF01F) is written
to the current data area (WRF00B to WRF00F). If the data is wrong, error flag (R7BF) will turn on. If data is right,
clock data will be written and writing flag R7FB will turn off.

(3)

Adjusting the clock data ± 30 seconds
By turning on the ± 30 seconds adjustment request (R7FA), one of the following operations is performed depending
on the second value:
If the second digits are 00 to 29, the second digits are set to 00.
If the second digits are 30 to 59, the minute is incremented by 1 and the second digits are set to 00.

•
•
(4)
•

Special internal output definitions
Operation bits

I/O number
R7F8
R7F9
R7FA
R7FB

•

Description
Calendar and clock data is read out to
WRF01B-F01F.
Calendar and clock data in WRF01B-F01F is
written to the current data in WRF00B-F00F.
Sets the second digits of the RTC to 00.
Turns on when the setting data is abnormal.

Current data monitor area : Current data of the clock given always (all BCD data).

I/O number
WRF00B
WRF00C
WRF00D
WRF00E
WRF00F
•

Name
Request to read calendar and
clock data
Request to write calendar and
clock data
Clock ± 30 seconds adjustment
request
Calendar and clock setting data
error

Name
Year
Month and date
Day of the week
Hour and minute
Second

Description
4-digit year [yyyy]
[mmdd]
0 to 6 : Sunday to Saturday
[hhmm] (24-hour system).
[00ss]

Reading/writing area : Clock data to be read or written.
(All BCD data)

I/O number
WRF01B
WRF01C
WRF01D
WRF01E
WRF01F

Name
Year
Month and date
Day of the week
Hour and minute
Second

Description
4-digit year [yyyy]
[mmdd]
0 to 6 : Sunday to Saturday
[hhmm] (24-hour system).
[00ss]

Note 1: The day of the week data is expressed as follows.
0: Sunday, 1: Monday, 2: Tuesday, 3: Wednesday, 4: Thursday, 5: Friday, 6: Saturday

3-15

Chapter 3 Function and Performance Specifications

3.3.13 Power Supply for Sensor
The 24 V terminal at the input terminal part can supply current to external equipment (not for all units).
If this terminal is used as the power supply for the input part of this unit, the remaining can be used as power supply for the
sensors.
The following current (I) can be supplied as power supply for the sensors.
(1)

EH-*14*** (14-point type basic unit)
EH-*14E*** (14-point type extension unit)
I = 350 mA – (7.5 mA x number of input points that are turned on at the same time)

(2)

EH-A28DR* (28-point type basic unit)
EH-A23DR*** (23-point type basic unit)
I = 280 mA – (7.5 mA x number of input points that are turned on at the same time)

3-16

Chapter 4 Product lineup and wiring

Chapter 4
4.1

Product lineup and wiring

Product lineup
(1)

Basic units
Table 4.1 Product lineup list

Type

Specifications

DC power, DC input × 6, Transistor (sink) output × 4
DC power, DC input × 6, Transistor (source) output × 4
DC power, DC input × 6, Relay output × 4
DC power, DC input × 8, Transistor (sink) output × 6
DC power, DC input × 8, Transistor (source) output × 6
AC power, DC input × 8, Relay output × 6
DC power, DC input × 8, Relay output × 6
AC power, AC input × 8, SSR output × 6
DC power, DC input × 13, Relay output × 9, Transistor output (source) × 1,
EH-D23DRP
Analog input × 2, Analog output × 1
AC power, DC input × 13, Relay output × 9, Transistor output (sink) × 1,
EH-A23DRT
Analog input × 2, Analog output × 1
AC power, DC input × 13, Relay output × 9, Transistor output (source) × 1,
EH-A23DRP
Analog input × 2, Analog output × 1
EH-D28DT
DC power, DC input × 16, Transistor (sink) output × 12
EH-D28DTP
DC power, DC input × 16, Transistor (source) output × 12
EH-D28DTPS DC power, DC input × 16, Transistor (source) output (ESCP) × 12
EH-D28DRT
DC power, DC input × 16, Relay output × 11, Transistor output (sink) × 1
EH-D28DRP
DC power, DC input × 16, Relay output × 11, Transistor output (source) × 1
EH-A28DRT
AC power, DC input × 16, Relay output × 11, Transistor output (sink) × 1
EH-A28DRP
AC power, DC input × 16, Relay output × 11, Transistor output (source) × 1
EH-A28DR
AC power, DC input × 16, Relay output × 12
EH-A28AS
AC power, AC input × 16, SSR output × 12
EH-D14EDT
Expansion unit, DC power, DC input × 8, Transistor (sink) output × 6
EH-D14EDTP Expansion unit, DC power, DC input × 8, Transistor (source) output × 6
EH-D14EDTPS Expansion unit, DC power, DC input × 8, Transistor (source) output (ESCP) × 6
EH-D14EDR
Expansion unit, DC power, DC input × 8, Relay output × 6
EH-A14EDR
Expansion unit, AC power, DC input × 8, Relay output × 6
EH-D28EDT
Expansion unit, DC power, DC input × 16, Transistor (sink) output × 12
EH-D28EDTPS Expansion unit, DC power, DC input × 16, Transistor (source) output (ESCP) × 12
EH-D28EDR
Expansion unit, DC power, DC input × 16, Relay output × 12
EH-A28EDR
Expansion unit, AC power, DC input × 16, Relay output × 12
EH-D6EAN
Expansion unit, DC power, Analog input × 4, Analog output × 2
EH-A6EAN
Expansion unit, AC power, Analog input × 4, Analog output × 2
EH-D10DT
EH-D10DTP
EH-D10DR
EH-D14DT
EH-D14DTP
EH-A14DR
EH-D14DR
EH-A14AS

I/O assignment
symbol
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/
empty16/WX4/WY4
X48/Y32/
empty16/WX4/WY4
X48/Y32/
empty16/WX4/WY4
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
X48/Y32/empty16
B1/1
B1/1
B1/1
B1/1
B1/1
B1/1
B1/1
B1/1
B1/1
FUN 0
FUN 0

Each digit in the type name has the following meaning:
EH

-

D 28

 D T P
[None]: Sink, T: Sink, P: Source (except in the cases of relay output and SSR output)
R: Relay output, T: Transistor (DC) output, S: SSR (AC) output
D: DC input, A: AC input
[None]: Basic unit, E: Expansion unit
10: 10-point type, 14: 14-point type, 23: 23-point type, 28: 28-point type
A: AC power supply type, D: DC power supply type

4-1

Chapter 4 Product lineup and wiring

(2)

Peripheral Units

Table 4.2 List of peripheral units
Specification
Ladder diagram/Instruction language editor LADDER EDITOR (for GPCL)
Ladder diagram/Instruction language editor LADDER EDITOR (for PC98
series) with CPU connection cable
HL-AT3E
Ladder diagram/Instruction language editor LADDER EDITOR (for PC/AT
compatible personal computer)
HLW-PC3
Ladder diagram/Instruction language editor LADDER EDITOR (for Windows®
95/NT 4.0)
HLW-PC3E Ladder diagram/Instruction language editor LADDER EDITOR (for Windows®
95/98/NT 4.0)
Pro-H
HITACHI H-series PLC Programming Software According to IEC 61131-3 (for
Windows® 95/98/NT 4.0)
Note: HI-LADDER (attached to the GPCL01H) may also be used.
However, HL-GPCL and HI-LADDER cannot be used for the 10-point type.
Product
Graphic input
device support
software

(3)

Form
HL-GPCL
HL-PC3

Remarks

Connection Cables

Product
Form
Cable for connecting basic unit EH-MCB10
and expansion unit
EH-MCB05
EH-MCB01
Conversion cable for
EH-RS05
connecting peripheral units
Peripheral equipment
GPCB02H
GPCB05H
GPCB15H
CBPGB
LP100
KBADPTH
PCCB02H
WPCB02H
WVCB02H
EH-VCB02

Table 4.3 List of connection cables
Specification
Length: 1 m (basic unit–exp. unit, exp. unit - exp. unit)
Length: 0.5 m (basic unit–exp. unit, exp. unit - exp. unit)
Length: 0.1 m (basic unit–exp. unit, exp. unit - exp. unit)
Length: 0.5 m

Remarks
Total 2 m
Total 2 m
Total 2 m
*

Length: 2 m, between CPU and graphic input unit
Length: 5 m, between CPU and graphic input unit
Length: 15 m, between CPU and graphic input unit
Length: 2 m, between graphic input unit and printer
Length: 2 m, between graphic input unit and kanji printer
Length: 15 m, between graphic input unit and JIS keyboard
Length: 2 m, between CPU and PC98 series
**
Length: 2 m, between CPU and PC98 series (25-pin)
**
Length: 2 m, between CPU and DOS/V (9-pin)
**
Length: 2 m, between CPU (8P modular terminal) and DOS/V
(9-pin)
*: Required when connecting the MICRO-EH with PC98, IBM PC/AT compatible PC or other system using one of the cables
marked with **.
(4)
Model
EH-MBAT

Others
Usage

Remarks

Lithium battery

4-2

Chapter 4 Product lineup and wiring

4.2

10-Point Basic Unit

Name and function of each part

Type

EH-D10DT, EH-D10DTP, EHD10DR

6] Input terminals

5] RUN input
9] Mounting hole

1] POW LED
2] OK LED
3] RUN LED

4] Serial port

7] Output terminals
8] Power terminal

No.
Item
Explanation of operation

1]
2]
3]
4]

POW LED
OK LED
RUN LED
Serial port 1

5]

RUN input

6]

Input terminals

7]

Output terminals

8]

Power terminal

9]
10]

Mounting hole
DIN rail
installation clip

10] DIN rail installation clip

Detailed explanation
Operations are performed according to the contents of the program created
by the user.
The programming unit connected to the CPU module communication port
writes and reads the user programs.
Memory is installed inside the CPU module in which the user programs and
internal output information are stored.
Lighting when the power is supplied.
Lighting at normal operation.
Lighting at RUN status.
Serial port for connecting the peripheral units. Communication speed is
fixed as 4800 bps.
The communication specification is set to port 1.
External input to control the PLC’s RUN/STOP.
When 24 V DC is loaded to the RUN terminal and common terminal (C),
the PLC is set to the RUN state.
Terminals for wiring the external input units.
One piece of AWG14 to AWG22 (2.1 to 0.36 mm2) or two pieces of
AWG16 to AWG22 (1.3 to 0.36 mm2) per terminal may be wired.
Terminals for connecting the external load. The wiring specification is the
same as for the input terminals.
Terminal for connecting the power supply. The wiring specification is the
same as for the input terminals.
Used when installing the PLC directly on a board with screws
Used when installing the PLC on a DIN rail

4-3

Remarks

See Chapter 12.
See Chapter 11.
See Chapter 10.
See Chapter 10.
See Chapter 10.
See Chapter 10.
See Chapter 10.
See Chapter 10.

Chapter 4 Product lineup and wiring

4.3

14-Point Basic Unit

Name and function of each part

Type

10] Terminal cover

EH-*14***

5] Input terminals
1] POW LED
2] OK LED
3] RUN LED

8] Expansion
connector cover

11] Mounting hole

9] DIP SW cover
6] Output terminals
12] DIN rail installation clip

4] Serial port cover

7] Power terminal

No.
Item
Explanation of operation

1]
2]
3]
4]

POW LED
OK LED
RUN LED
Serial port cover

5]

Input terminals

6]

Output terminals

7]

Power terminal

8]
9]

Expansion cover
DIP SW cover

10]
11]
12]

Terminal cover
Mounting hole
DIN rail
installation clip

Detailed explanation
Operations are performed according to the contents of the program created
by the user.
The programming unit connected to the CPU module communication port
writes and reads the user programs.
Memory is installed inside the CPU module in which the user programs and
internal output information are stored.
Lighting when the power is supplied.
Lighting at normal operation.
Lighting at RUN status.
Cover for the connector for connecting
STOP
RUN
peripheral units and the RUN switch.
When the cover is opened, the RUN switch,
VR1
VR2
potentiometers (VR), and RS-232C serial port 1
(PORT 1) can be used.
PORT1
The communication specification is set to port 1.

Terminals for wiring the external input units.
Recommended terminals are shown in the
6
figure to the right.
One piece of AWG14 to AWG22 (2.1 to
6
0.36 mm2) or two pieces of AWG16 to
AWG22 (1.3 to 0.36 mm2) per terminal may
be wired.
Terminals for connecting the external load.
The wiring specification is the same as for the input terminals.
Terminal for connecting the power supply.
The wiring specification is the same as for the input terminals.
Cover for the expansion connector
Cover for the DIP switches
When the cover is opened, the DIP switches are exposed. These DIP
switches are used to set the communication speed of serial port 1 and the
modem connection.
Cover for terminals
Used when installing the PLC with screws
Used when installing the PLC on a DIN rail

4-4

Remarks

See Chapter 12.
See Chapters 8 and 11.

See Chapter 10.
(Make sure that the terminals will not
disengage due to loose screws.)

(Recommended)

See Chapter 10.
See Chapter 10.
See Chapter 10.
See Chapter 11.

See Chapter 10.
See Chapter 10.

Chapter 4 Product lineup and wiring

4.4

23-Point and 28-Point Basic Unit

Name and function of each part

Type

10] Terminal cover

EH-*23***
EH-*28***

5] Input terminals

13] RS-485 port cover
1] POW LED
2] OK LED
3] RUN LED

11] Mounting
hole

8] Expansion
connector cover
9] DIP SW cover

4] Serial port cover

6] Output terminals
12] DIN rail installation clip
7] Power terminal

No.
Item
Explanation of operation

1]
2]
3]
4]

POW LED
OK LED
RUN LED
Serial port cover

5]

Input terminals

Detailed explanation
Operations are performed according to the contents of the program created
by the user.
The programming unit connected to the CPU module communication port
writes and reads the user programs.
Memory is installed inside the CPU module in which the user programs and
internal output information are stored.
Lighting when the power is supplied.
Lighting at normal operation.
Lighting at RUN status.
Cover for the connector for connecting
STOP
RUN
peripheral units and the RUN switch.
When the cover is opened, the RUN switch,
VR1
VR2
potentiometers (VR), and RS-232C serial port 1
(PORT 1) can be used.
PORT1
The communication specification is set to port 1.

Terminals for wiring the external input units.
Recommended terminals are shown in the figure
6
to the right.
One piece of AWG14 to AWG22 (2.1 to 0.36
mm2) or two pieces of AWG16 to AWG22 (1.3
6
to 0.36 mm2) per terminal may be wired.
Terminals for connecting the external load.
The wiring specification is the same as for the input terminals.
Terminal for connecting the power supply.
The wiring specification is the same as for the input terminals.
Cover for the expansion connector
Cover for the DIP switches and the backup battery storage unit.
When the cover is opened, the DIP switches are exposed. These DIP
switches are used to set the communication speed of serial port 1 and the
modem connection.
Cover for terminals
Used when installing the PLC with screws
Used when installing the PLC on a DIN rail

6]

Output terminals

7]

Power terminal

8]
9]

Expansion cover
DIP SW cover

10]
11]
12]

Terminal cover
Mounting hole
DIN rail
installation clip
RS-485 port cover Cover for RS-485 port. It is connected with a D sub 15-pin female
connector. The communication specification is set to port 2.

13]

4-5

Remarks

See Chapter 12.
See Chapters 8 and 11.

See Chapter 10.
(Make sure that the terminals will not
disengage due to loose screws.)

(Recommended)

See Chapter 10.
See Chapter 10.
See Chapter 10.
See Chapter 11.

See Chapter 10.
See Chapter 10.
See Chapter 11.

Chapter 4 Product lineup and wiring

4.5

Expansion Unit

Name and function of each part

Type

9] Terminal cover

EH-*14ED** (same dimension as 14 pts. basic unit)
EH-*28ED** (same dimension as 28 pts. basic unit)
EH-*6EAN (same dimension as 14 pts. basic unit)

4] Input terminals

1] POW LED
2] OK LED

10] Mounting
hole

7] Expansion connector cover
(right side)

8] Dummy cover
3] Expansion connector cover
(left side)

5] Output terminals
11] DIN rail installation clip
6] Power terminal

No.
Item
Explanation of operation

1]
2]
3]
4]

POW LED
OK LED
Expansion cover
(Left side)
Input terminals

5]

Output terminals

6]

Power terminal

7]

Expansion cover
(Right side)
Dummy cover
Terminal cover
Mounting hole
DIN rail
installation clip

8]
9]
10]
11]

Above picture is 14 points module
Detailed explanation
Remarks
Operations are performed according to the contents of the program created
by the user.
The programming unit connected to the CPU module communication port
writes and reads the user program.
Memory is installed inside the CPU module in which the user program and
internal output information are stored.
Lighting when the power is supplied.
Lighting at normal operation.
Cover for expansion connector
See Chapter 10.
Used when connecting to the expansion cable from the front unit.
See Chapter 10.
Terminals for wiring the external input units.
Recommended terminals are shown in the figure
(Make sure that the terminals will not
6
disengage due to loose screws.)
to the right.
One piece of AWG14 to AWG22 (2.1 to 0.36
(Recommended)
6
mm2) or two pieces of AWG16 to AWG22 (1.3
to 0.36 mm2) per terminal may be wired.
Terminals for connecting the external load. The wiring specification is the
See Chapter 10.
same as for the input terminals.
Terminal for connecting the power supply. The wiring specification is the
See Chapter 10.
same as for the input terminals.
Cover for expansion connector
See Chapter 10.
Used when connecting to the next unit.
Cover used as a dummy.
Cover for terminals
Used when installing the PLC with screws
See Chapter 10.
Used when installing the PLC on a DIN rail
See Chapter 10.

4-6

Chapter 4 Product lineup and wiring

4.6

Terminal Layout and Wiring

10-point type
EH-D10DT, EH-D10DTP
*

Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.
Input power supply
24 V DC

RUN

NC

0

1

2

3

C0

4

5

In case of EH-D10DTP
24 V

0V

0

1

2

3

C0

V0

In case of EH-D10DT
Power supply
24V DC

Load power supply
12/24V DC

EH-D10DR
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Input power supply
24V DC

RUN

NC

24V

0V

0

1

2

3

C0

4

5

NC

0

1

2

3

C0

Load power supply
24V DC
100-240V AC

Power supply
24V DC

4-7

Chapter 4 Product lineup and wiring

14-point type
EH-A14DR, EH-D14DR
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Input power supply
24V DC
24+
0V

1
0

AC

3
2

0

AC

4
C0

1
C0

6
5

2
C1

C1

Input

7
4

3

C2

Output

5

Load power supply
24V DC,
100-240V AC

AC power supply
100-240V AC
0V
24V

DC power supply
24V DC

EH-A14EDR, EH-D14EDR
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Input power supply
24V DC
24+
0V

1
0

AC
AC

3
2

16

4
C0

17
C0

6
5

18
C1

C1
7

20
19

Input

C2
21

Output
Load power supply
24V DC,
100-240V AC

AC power supply
100-240V AC
0V
24V

DC power supply
24V DC

4-8

Chapter 4 Product lineup and wiring

EH-A14AS

Power supply for input
100-115V AC

24+
0V

1
0

AC

3
2

NC

AC

4
C0

1
0

6
5

2
C0

Input

C1
7

4
3

C1

Output

5

Load power supply
100-240V AC

Power supply
100-240V AC

EH-D14DTP
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Power supply for input
24V DC
24+
0V

1
0

0V

3
2

0

24V

4
C0

NC
1

6
5

3
2

C1

Input

7
5

4

C0
V0

Output

Load power supply
12/24V DC

Power supply
24V DC

EH-D14DT
(The input wiring is the same as EH-D14DTP.)
0V
24V

0

NC
1

3
2

Power supply
24V DC

5
4

C0
V0

Output

Load power supply
12/24V DC

4-9

Chapter 4 Product lineup and wiring

EH-D14EDTP
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

24+
0V

1
0

0V

3
2

16

24V

4
C0

NC
17

6
5

19
18

C1

Input

7
21

20

C0

Output

V0

Power supply
24V DC

Load power supply
12/24V DC

EH-D14EDT
(The input wiring is the same as EH-D14EDTP.)

0V
24V

16

NC
17

19
18

21
20

C0
V0

Output
Load power supply
12/24V DC

Power supply
24V DC

4-10

Chapter 4 Product lineup and wiring

23-point type
EH-A23DRP
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Power supply for
input, 24V DC

24+

1

0V

3

0

2

AC

0

AC

4
C0

V0
C0

6
5

2
1

10

C2

7
4

3

8

C1

5

9
6

C1

12
11

7

C2

C3

IN1+
IN1-

8
C4

IN2-

9

Input

IN2+

IN1JP

C5

IN2JP

IO
IC

VO
VC

Output
+

Power supply
100-240V AC

Load power supply
24V DC,
100-240V AC

TR output power supply
16-30V DC

EH-A23DRT
(The input wiring is the same as EH-A23DRP.)
AC

0

AC

NC
C0

1

Power supply
100-240V AC

EH-D23DRP

0V

Output

24V

TR output power supply
16-30V DC

Analog voltage input

IN1+
IN1-

2

IN2-

IN1JP

IN2JP

IN2+

IN1+

0

V0
C0

2
1

Output

TR output power supply
16-30V DC

Analog current input

IN1-

Analog output

IN2-

IN1JP

IN2JP

IN2+

4-11

In case of analog current input, please set
the following value in WRF06E.
WRF06E
ch-0
ch-1
H0000
Voltage
Voltage
H4000
Voltage
Current
H8000
Current
Voltage
HC000
Current
Current
Please refer to Chapter 8-9.

Chapter 4 Product lineup and wiring

28-point type
EH-A28DRP
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Power supply
for input 24V DC

24+
0V

1
0

AC

3

4

2
0

C0
V0

5
2

C0

AC

1

Power supply
100-240V AC

6

8

7
4

3

9

C1

5
C1

C2

AC

NC
C0

2

Output

1

Power supply
100-240V AC

EH-D28DRP
(The input wiring is the same as EH-A28DRP.)
0V

0

24V

V0
C0

Power supply
24V DC

2
1

Output

TR output power supply
16-30V DC

EH-D28DRT
(The input wiring is the same as EH-A28DRP.)
0V
24V

0

NC
C0

2
1

C2
C2

7
C3

13
12

8
C4

15
14

9
C5

C3

11
10

Input

C3
C6
C6

Output

Load power supply
24V DC, 100-240V AC

TR output power supply
16-30V DC

0

10
6

EH-A28DRT
(The input wiring is the same as EH-A28DRP.)
AC

11

Output

Power supply
24V DC
4-12

Chapter 4 Product lineup and wiring

EH-A28AS
Power supply for input
100-115V AC

NC
NC

1
0

AC

3
2

NC

C0
1

0

AC

4

6
5

2
C0

C1

C2

7
4

3

C2
C1

5

9
8

NC
NC

11

C3

10
C2

C2

C3
7

12
C3

6

C3

Power supply
100-240V AC

13

15

Input

14
9

8

11

Output

10

Load power supply
100-240V AC

EH-D28DTP
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Power supply for
input, 24V DC

24+
0V

1
0

0V

3
2

0

C0
NC

1

24V

4

6
5

3
2

9

C1
8

7
5

4

C0
V0

11
10

C1
NC

C2
C2

V1
C1

13
12

6
V1

14
8

7

Power supply
24V DC

15

C3

Input

C3
NC

9

11

Output

10

Load power supply
12/24V DC

EH-D28DT
(The input wiring is the same as EH-D28DTP.)
0V
24V

0

NC
1

3
2

5
4

C0
V0

C1
NC

Power supply
24V DC

V1
C1

6
V1

8
7

NC
9

11
10

Load power supply
12/24V DC

4-13

Output

Chapter 4 Product lineup and wiring

EH-A28DR
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Power supply
for input 24V DC

24+
0V

1
0

AC

3
2

0

C0
NC

C0

AC

4

6
5

2
1

9

C1
8

7
4

3

5

11
10

6

C1

C2

C2
C2

7
C3

13
12

8
C4

15
14

9
C5

11
10

Power supply
100-240V AC

Input

C3
C3
C6

Output

C6

Load power supply
24V DC, 100-240V AC

EH-A28EDR
* Since the DC input is bidirectional, it is possible to reverse the polarity of the power supply.

Power supply
for input 24V DC

24+
0V

1
0

AC

3
2

16

C0
NC

C0

AC

4

6
5

18
17

8

7
20

19

9

C1

21

11
10

22

C1

C2

C2
C2

23
C3

13
12

24
C4

14
25

C5

Power supply
100-240V AC

C3

27
26

C6
C6

EH-D28EDR

0V

Input

C3

Output

Load power supply
24V DC, 100-240V AC

EH-D28DR

24V

15

0

NC
C0

2
1

0V
24V

4-14

16

NC
C0

18
17

Output

Chapter 4 Product lineup and wiring
Analog expansion unit
EH-A6EAN (Example of voltage input and voltage output)

Voltage input × 4
IN1+
IN1-

IN2-

IN1JP
AC

IN2JP

IN2+

NC

AC

IN3+

IN3IO6

OC6

IN4-

IN3JP

OC7
VO6

IN4JP

IN4+

VO7
IO7

Input and output can be configured
as voltage or current independently.

NC
NC

Voltage output × 2
_

_

+

Power supply
100-240V AC

+

EH-D6EAN (Example of current input and current output)

Current input × 4

IN1+
IN1-

IN2-

IN1JP
0V

24V

IN2JP

IN2+

NC

IO6
OC6

IN3+

IN3-

IN4-

IN3JP

OC7
VO6

IN4JP

IN4+

VO7
IO7

Input and output can be configured
as voltage or current independently.

NC
NC

Current output × 2
Power supply
24V DC

4-15

Chapter 4 Product lineup and wiring

4.7

Weights and Power Consumption
Type

Weight
(g)

100V AC
Normal
Rush
-

-

Power consumption (A)
264V AC
24V DC
Normal
Rush
Normal
Rush

EH-D10DT/DTP/DR

200

-

-

0.12

0.6

EH-D14DT/DTP/DTPS

300

-

-

EH-A14DR

400

0.1

15

-

-

0.16

0.6

0.06

40

-

-

EH-D14DR

300

-

-

-

-

0.16

0.6

EH-A14AS

380

0.1

15

0.06

40

-

-

EH-A23DRP/DRT

600

0.2

15

0.06

40

-

-

EH-D23DRP

500

-

-

-

-

0.2

0.6
0.6

EH-D28DT/DTP/DTPS

500

-

-

-

-

0.2

EH-A28DRP/DRT

600

0.1

15

0.06

40

-

-

EH-A28DR

600

0.2

15

0.06

40

-

-

EH-D28DRP/DRT

500

-

-

-

-

0.3

0.6

EH-D28DR

500

-

-

-

-

0.3

0.6

EH-A28AS

600

0.2

15

0.06

40

-

-

EH-D14EDT/EDTP/EDTPS

300

-

-

-

-

0.16

0.6

EH-A14EDR

400

0.1

15

0.06

40

-

-

EH-D14EDR

300

-

-

-

-

0.16

0.6

EH-D28EDT/EDTPS

500

-

-

-

-

0.2

0.6

EH-A28EDR

600

0.2

15

0.06

40

-

-

EH-D28EDR

500

-

-

-

-

0.3

0.6

EH-A6EAN

400

0.1

15

0.06

40

-

-

-

0.16

0.6

EH-D6EAN

300

-

-

-

4-16

Remarks

Chapter 4 Product lineup and wiring

4.8

Exterior Dimensions

(1) 10-point type
(Unit : mm)

70 80

4.4

65

8

47

75

(2) 14-point type, 14-point expansion unit, Analog expansion unit

80

90

4.8

85

76

95

8.4

(3) 23-point, 28-point types and 28-point expansion

80 90

4.8

140

76

150

4-17

8.4

Chapter 4 Product lineup and wiring

MEMO

4-18

Chapter 5 Instruction Specifications

Chapter 5
5.1

Instruction Specifications

Instruction Classifications
The instructions used with the MICRO-EH are classified as shown in the following table.
Table 5.1 Instruction classification table
Instruction classification
Description
Basic instructions
Sequence
Timer/counter
Relational box
Arithmetic instructions
Substitution (array variable)
Mathematical operations
Logical operations
Relational expression
Application instructions
Bit operation
Shift/rotate
Transfer
Negation/Two's complement/Sign
Conversion
Application: BCU, SWAP, UNIT, DIST
Control instructions
END, JMP, CAL, FOR, NEXT, RTS, RTI, LBL, SB,
INT, CEND, CJMP
Transfer instructions
TRNS 0, RECV 0
FUN instructions
Refresh, high-speed counter, PMW, pulse, comments

No.
1

2

3

4
5
6

5.2

Type
21
6
8
1
10
3
8
3
8
3
3
4
4
12
2
18

List of Instructions
[Legend]
Condition codes
DER
ERR
SD
V
C
z
1]
↕

Processing time

Data error (special internal output R7F4)
Set to “1” as a data error when the I/O number is exceeded or when the BCD was abnormal data, etc.
When there is no data error, it is set to “0.”
Error (special internal output R7F3)
Set to “1” when an error is generated when a control instruction and a special instruction are executed.
The error code is set in WRF015. When there are no errors, the previous status is maintained.
Shift data (special internal output R7F2)
Performs shift-in of the contents of SD by the SHR or SHL instruction.
Over flow (special internal output R7F1)
Indicates that a digit overflow has occurred and the signed data range is exceeded as a result of signed
data operations.
Carry (special internal output R7F0)
Indicates the contents of digit increase due to addition, digit decrease due to subtraction, and shift-out
due to shifting.
Maintains the previous status.
Set to “1” when there is an error in operation results. The previous status is maintained if there is no
error.
Changes according to the operation result.
This indicates the instruction processing time.
The displayed value is an average. It varies depending on the parameter and data count with the
instructions used.
See the details on the instruction specifications for details.

5-1

Chapter 5 Instruction Specifications

The following lists the instructions.

1

Logical
Indicates the
operation start commencement of acontact operation.
LDI Logical
Indicates the
negation
commencement of boperation start contact operation.
AND Logical AND Indicates a-contact series
connection.

3

4

ANI Logical
NAND

Indicates b-contact series
connection.

5

OR

Indicates a-contact
parallel connection.

6

ORI Logical NOR Indicates b-contact
parallel connection.

7

NOT Logical NOT

8

9

Logical OR

0.9

Steps

R7F0

MICRO-EH

1

0.8

2

z z z z z

0.8

2

z z z z z

1.0

3 Number
4 overlap not
allowed

z z z z z

1.2

3 Number
4 overlap not
allowed

z z z z z
Indicates an output coil. X, Y
R0 to R7BF
M0 to M3FFF
TD, SS, CU,
CTU, CTD, CL
Timer: 0 to 255
Counter: 0 to 255
z z z z z
Indicates set output.
X, Y
R0 to R7BF
M0 to M3FFF

1.0

1

0.9

1

Reverses all operation
results up to that point.

None

OR
DIF

DFN

AND Trailing edge
DFN detection

DFN

OR
DFN

SET I/O set

C

0.9

DIF

11

V

Remarks

z z z z z

AND Leading edge Indicates detection of the DIF0 to DIF511
DIF detection
input rise.
(Decimal)

OUT I/O output

Process
time
(µs)

z z z z z
X, Y
R0 to R7BF
M0 to M3FFF
TD, SS, CU, CT
Timer: 0 to 255
Counter: 0 to 255
DIF0 to DIF511
DFN0 to
DFN511

DIF

10

R7F1

DER ERR SD

LD

2

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Basic instructions (sequence instructions)

Sequence instructions Classification
Item number

1.

Indicates detection of the DFN0 to
input fall.
DFN511
(Decimal)

SET
12

RES I/O reset

Indicates reset output.

MCS Set master
control

Indicates master control
set operation.

MCS0 to MCS49 z z z z z

0.7

3 Number
overlap
allowed

MCR Reset master
control

Indicates master control
reset operation.

MCR0 to
MCR49

z z z z z

0.7

2 Number
overlap
allowed

RES
13
MCS
14
MCR

5-2

MPS Operation Stores the previous
result push operation result.

16

MRD

MRD Operation
result read

17

MPP

None

Reads the stored operation
result and continues
operation.
MPP Operation Reads the stored operation
result pull result, continues operation
and clears the stored result.
ANB Logical
Indicates serial connection None
block serial between two logical blocks.
connection

21

Indicates parallel
connection between two
logical blocks.

R7F0

V

C

MICRO-EH

Steps

R7F1

R7F2

Process
time
(µ s)

z z z z z

—

0

z z z z z

—

0

0.7

1

None

Indicates start and end of a None
process box.

z z z z z

0.6

3

Indicates start and end of a None
comparison box.

z z z z z

0.8

0

Steps

ORB Logical
block
parallel
connection
[ ] Processing
box start
and end
( ) Relational
box start
and end

20

R7F3

I/O types used

DER ERR SD

MPS

19

Remarks

TD

23
SS

24
CU
25
CTU
26
CTD
27
CL

R7F0

DER ERR SD

R7F1

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Timer Classification
Item number

Basic instructions (timer, counter)

22

Counter

Process descriptions

15

18

2.

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Sequence instructions Classification
Item number

Chapter 5 Instruction Specifications

Process
time
(µ s)

V

C

MICRO-EH

z z z z z
Indicates an on delay timer TD0 to TD255
operation.
When 0.01 s, it is
possible to use
until 0 to 63.
z z z z z
OUT Single shot Indicates a single shot
SS0 to SS255
SS
operation.
When 0.01 s, it is
possible to use 0
to 63.
z z z z z
OUT Counter
Indicates a counter
CU0 to CU255
CU
operation.
OUT On delay
TD timer

OUT Up of
CTU up/down
counter
OUT Down of
CTD up/down
counter
OUT Counter
CL clear

1.4

5 Number
overlap not
allowed

1.4

5

1.4

5

Indicates an up operation of CTU0 to
up-down counter.
CTU255

z z z z z

1.4

5

Indicates a down operation CTD0 to
of up-down counter.
CTD255

z z z z z

1.4

3

Indicates a clear operation
for CU, RCU, CTU, CTD
and WDT.

z z z z z

0.9

1

5-3

CL0 to CL255

Remarks

Chapter 5 Instruction Specifications

28

s1
==
s2

s1
==

AND
(s1==
s2)

==

[Word]
WX, WY, WR,
WM,
Timer Counter
[Double word]
DX, DY, DR,
DM

R7F0

Process
time
(µ s)

V

C

MICRO-EH

z z z z z

27

Steps

R7F1

DER ERR SD

LD
= Relational When s1 = s2: Continuity
(s1== box
When s1 ≠ s2:
s2)
Noncontinuity

5
6
7
8

35

Remarks

*1
*2
Upper
case: W
Lower
case: DW

Constant

s2
s1

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Basic instructions (relational box)

Relational box Classification
Item number

3.

OR
(s1==
s2)

s2

29

s1
S==
s2
s1
S==
s2
s1
S==
s2

30

s1
<>

LD
(s1
S==
s2)

Signed =
Relational
box

When s1 = s2: Continuity
When s1 ≠ s2:
Noncontinuity
s1 and s2 are compared as
signed 32-bit binary.

DX, DY, DR,
DM

When s1 = s2:
Noncontinuity
When s1 ≠ s2: Continuity

[Word]
WX, WY, WR,
WM,
Timer Counter
[Double word]
DX, DY, DR,
DM

<>

<>

z z z z z

26.8

Constant

5 *2
6
7
8

OR
(s1
S==
s2)
LD
(s1<
>s2)

<>
Relational
box

AND
(s1<
>s2)

34.5

5
6
7
8

*1
*2
Upper
case: W
Lower
case: DW

Constant

s2
s1

35

AND
(s1
S==
s2)

s2
s1

z z z z z

OR
(s1<
>s2)

s2

31
s1
S<>
s2
s1
S<>
s2
s1
S<>
s2

*1:
*2:

LD
(s1
S<>
s2)

Signed <>
Relational
box

When s1 = s2:
Noncontinuity
When s1 ≠ s2: Continuity
s1 and s2 are compared as
signed 32-bit binary.

DX, DY, DR,
DM
Constant

z z z z z

34.5

5 *2
6
7
8

AND
(s1
S<>
s2)
OR
(s1
S<>
s2)

In the case of word, it requires five steps for LD (s1s2) and AND (s1s2), and six steps for OR (s1s2).
In the case of double word, for LD (s1s2) and AND (s1s2), it requires five steps when the combination of s1 and s2 is I/O
and I/O, six steps when the combination is either I/O and constant or constant and I/O, and seven steps when the combination
is constant and constant. For OR (s1s2), one step is added respectively.

5-4

32

s1
<
s2
s1
<

AND
(s1<
s2)

<

V

C

MICRO-EH

z z z z z

26.8

Steps

Process
time
(µ s)

5
6
7
8

37.5

Remarks

*1
*2
Upper
case: W
Lower
case: DW

Constant

s2
s1

R7F0

DER ERR SD

[Word]
WX, WY, WR,
WM,
Timer Counter
[Double word]
DX, DY, DR,
DM

R7F1

< Relational When s1 < s2: Continuity
box
When s1 ≥ s2:
Noncontinuity

I/O types used

R7F2

LD
(s1<
s2)

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Relational box Classification
Item number

Chapter 5 Instruction Specifications

OR
(s1<
s2)

s2

33

s1
S<
s2
s1
S<
s2
s1
S<
s2

34

s1
<=
s2
s1
<=
s2
s1
<=
s2

35

s1
S<=
s2
s1
S<=
s2
s1
S<=
s2

*1:
*2:

LD
(s1
S<
s2)

Signed <
Relational
box

When s1 < s2: Continuity
When s1 ≥ s2:
Noncontinuity
s1 and s2 are compared as
signed 32-bit binary.

DX, DY, DR,
DM

When s1 ≤ s2:
Noncontinuity
When s1 > s2: Continuity

[Word]
WX, WY, WR,
WM,
Timer Counter
[Double word]
DX, DY, DR,
DM

z z z z z

37.5

5 *2
6
7
8

z z z z z

26.8

5
6
7
8

Constant

AND
(s1
S<
s2)
OR
(s1
S<
s2)
LD
(s1
<=
s2)

<=
Relational
box

AND
(s1
<=
s2)

42

*1
*2
Upper
case: W
Lower
case: DW

Constant

OR
(s1
<=
s2)
LD
(s1
S<=
s2)

Signed <=
Relational
box

When s1 ≤ s2: Continuity
When s1 > s2:
Noncontinuity
s1 and s2 are compared as
signed 32-bit binary.

DX, DY, DR,
DM
Constant

z z z z z

37.5

5 *2
6
7
8

AND
(s1
S<=
s2)
OR
(s1
S<=
s2)

In the case of word, it requires five steps for LD (s1s2) and AND (s1s2), and six steps for OR (s1s2).
In the case of double word, for LD (s1s2) and AND (s1s2), it requires five steps when the combination of s1 and s2 is I/O
and I/O, six steps when the combination is either I/O and constant or constant and I/O, and seven steps when the combination
is constant and constant. For OR (s1s2), one step is added respectively.

5-5

Chapter 5 Instruction Specifications

Mathematical operation

1 d=s

Binary
addition

d ← s1+s2

3 d=s1 B+ s2

BCD
addition

d ← s1+s2

5 d=s1
s2 B -

Binary
d ← s1 - s2
subtraction
BCD
d ← s1 - s2
subtraction

R7F0

Process
time
(µ s)

V

C

MICRO-EH

↕

z z z z

32
74
52
92

[Word]
d: WY, WR,
WM, Timer ·
Counter
s: WX, WY, WR,
WM, Timer ·
Counter,
Constant
[Double word]
d: DY, DR,
DM
s: DX, DY, DR,
DM, Constant
* Array variables
can be used.
[Word]
d: WY, WR, WM
s1, s2: WX, WY,
WR, WM, Timer
Counter,
Constant
[Double word]
d: DY, DR, DM
s1, s2: DX, DY,
DR, DM,
Constant

↕

z z z z

27
66

I/O: I/O
I/O: Array
Array: I/O
Array:
Array
3 I/O: I/O
4 I/O: Array

53

4 Array: I/O

99

5 Array:
Array

35
86

4 I/O: I/O
4 I/O: Array

71

5 Array: I/O

120

5 Array:
Array
4 Upper
6 case: W
Lower
case: DW
4 Upper
case: W
6 Lower
case: DW
4 Upper
case: W
6 Lower
case: DW
4 Upper
case: W
6 Lower
case: DW
4 Upper
case: W
6 Lower
case: DW
4 Upper
case: W
6 Lower
case: DW
6

↕

z z z z

z z z

↕

↕

↕

45
61

z z z

↕

115
177

z z z

↕

↕

41
58

↕

Binary
d ← s1 x s2
multiplication

z z z

↕

104

↕

z z z z

43
112

7 d=s1 B x s2

BCD
d ← s1 x s2
multiplication

↕

z z z z

164
447

8 d=s1 S x s2

Signed binary d ← s1 x s2
multiplication

9 d=s1 / s2

Binary
division

10 d=s1 B/ s2

11 d=s1 S/ s2

BCD
division

[Word]
d ← s1 / s2
WRF016 ← s1 mod s2
[Double word]
d ← s1 / s2
DRF016 ← s1 mod s2

Signed
binary
division

5-6

Remarks

[Bit]
d: Y, R, M
s: X, Y, R, M,
Constant

163
6 d=s1 x s2

Steps

R7F1

DER ERR SD

Substitution d ← s
statement

2 d=s1+s2

4 d=s1 - s2

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Arithmetic instructions

Substitution statement Classification
Item number

4.

[Double word]
↕
d: DY, DR, DM
s1, s2: DX, DY,
DR, DM,
Constant
[Word]
↕
d: WY, WR, WM
s1, s2: WX, WY,
WR, WM,
Timer Counter,
Constant
[Double word]
d: DY, DR,, DM
s1, s2: DX, DY,
DR, DM,
Constant
[Double word]
↕
d: DY, DR, DM
s1, s2: DX, DY,
DR, DM,
Constant

z z z z

143

z z z z

55
110
152

z z

↕

z

3
4
4
5

4 Upper
case: W
6 Lower
case: DW
4 Upper
case: W

253

6 Lower
case: DW

101

6

12 d=s1 OR s2

13 d=s1 AND s2

14 d=s1 XOR s2

Logical
AND

Exclusive
OR

Process
time
(µ s)

V

C

MICRO-EH

z z z z z
[Bit]
d: Y, R, M
s1, s2: X, Y, R,
M
[Word]
d: WY, WR,
WM,
z z z z z
Timer Counter
s1, s2: WX, WY,
WR, WM, Timer
Counter, Constant
[Double word]
d: DY, DR, DM z z z z z
s1, s2: DX, DY,
DR, DM,
Constant

d ← s1 x s2

d ← s1 ⊕ s2

62
33
86
46
36
49
42
33

Relational expression

66
15 d=s1 == s2

= Relational When s1 = s2, d ← 1
expression When s1 ≠ s2, d ← 0

16 d=s1 S== s2

Signed =
Relational
expression

When s1 = s2, d ← 1
When s1 ≠ s2, d ← 0
s1 and s2 are compared as
signed 32-bit binary.

17 d=s1<>s2

<>
Relational
expression

When s1 = s2, d ← 0
When s1 ≠ s2, d ← 1

When s1 = s2, d ← 0
When s1 ≠ s2, d ← 1
s1 and s2 are compared as
signed 32-bit binary.

18 d=s1 S<> s2

Signed <>
Relational
expression

19 d=s1 s2, d ← 0
s1 and s2 are compared as
signed 32-bit binary.

R7F0

Process
time
(µ s)

V

C

MICRO-EH

z z z z z
[Word]
d: Y, R, M
s1, s2: WX, WY,
WR, WM, Timer
Counter,
Constant
[Double word]
d: Y, R, M
s1, s2: DX, DY,
DR, DM,
Constant
[Double word]
d: Y, R, M
s1, s2: DX, DY,
DR, DM,
Constant

Steps

R7F1

R7F2

R7F3

I/O types used

DER ERR SD

Signed ≤
Relational
expression

22 d=s1 S<= s2

Remarks

40

4 Upper
case: W

71

6 Lower
case: DW

50

6

2 BRES(d, n)

3 BTS(d, n)

4 SHR(d, n)

5 SHL(d, n)

n
d

1

Bit reset

Sets 1 to bit n.
n
d
0

0

Bit test

Sets 0 to bit n.
n
d

0

Shift right

Shift left

[Word]
d: WY, WR,
WM, TC
n(0-15): WX,
WY, WR, WM,
TC,
Constant

0

Process
time
(µ s)

V

C

MICRO-EH

z z z z z

26
35

z z z z z

29
38

[Double word]
z z z z
d: DY, DR, DM
n(0-31): WX,
WY, WR, WM,
Acquires the value in bit n TC,
Constant
to C (R7F0).
z z z z
[Word]
SD →
→ C d: WY, WR,
d
WM, TC
n: WX, WY, WR,
Shifts right by n bits.
WM, TC,
z z z z
C ←
← SD Constant
d
C

↕

↕

31

38

3 Upper
case: W
3 Lower
case: DW
3 Upper
case: W
3 Lower
case: DW
3 Upper
case: W
3 Lower
case: DW

38
46

Rotate right

→ C

d

Rotates right by n bits.
7 ROL(d, n)

Rotate left

C ←

d

z z z z
[Double word]
d: DY, DR, DM
n: WX, WY, WR,
WM, TC,
Constant
z z z z
*C: R7F0
SD: R7F2

↕

47
75

↕

46
54

Rotates left by n bits.
8 LSR(d, n)

Logical
shift right

0 →

→ C

d

z z z z

↕

9 LSL(d, n)

Logical
shift left

C ←

d

36
45

Shifts right by n bits.
← 0

z z z z

↕

36
45

Shifts left by n bits.

5-8

3 Upper
case: W
3 Lower
case: DW
3 Upper
case: W
3 Lower
case: DW
3 Upper
case: W
3 Lower
case: DW

Shifts left by n bits.
6 ROR(d, n)

Remarks

38

46
↕

Steps

R7F0

DER ERR SD

Bit set

R7F1

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Bit operations Classification
Item number

Application instructions

1 BSET(d, n)

Shift/rotate

Process descriptions

≤ Relational When s1 < s2, d ← 1
expression When s1 ≥ s2, d ← 0

21 d=s1 <= s2

5.

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Relational expression Classification
Item number

Chapter 5 Instruction Specifications

3 Upper
case: W
3 Lower
case: DW
3 Upper
case: W
3 Lower
case: DW
3 Upper
case: W
3 Lower
case: DW

10 BSR(d, n)

Transfer

12 MOV(d, s, n)

Negation / Two's complement / Sign

13 COPY(d, s, n)

14 XCG(d1, d2, n)

15 NOT(d)

16 NEG(d)

17 ABS(d, s)

Block
transfer

Copy

Block
exchange

Reverse

MICRO-EH

32

Shifts BCD to left by n
digits.
Transfers (copies) n bits (or
words) of data from I/O
number s to the n bit (or
word) range from I/O
number s.

Copies the bit (or word)
data of I/O number s to the
n bit (or word) range from
I/O number d.

Exchanges the n bit (or
word) range from I/O
number d1 and the n bit (or
word) range from I/O
number d2.

Reverses the bit for the I/O
number d value.

[Bit]
d, s: R, M
n(0-255): WX,
WY, WR, WM,
TC, Constant
[Word]
d, s: WR, WM
n(0-255):WX,
WY, WR, WM,
TC, Constant
[Bit]
d: R, M
s: X, Y, R, M,
Constant
n(0-255): WX,
WY, WR, WM,
TC, Constant
[Word]
d: WR, WM
s, n(0-255): WX,
WY, WR, WM,
TC, Constant
[Bit]
d1, d2: R, M
n(0-255): WX,
WY, WR, WM,
TC, Constant
[Word]
d: WR, WM
n(0-255): WX,
WY, WR, WM,
TC,
Constant
[Bit]
Y, R, M
[Word]
WY, WR, WM
[Double word]
DY, DR, DM
[Word]
WY, WR, WM

↕

↕

↕

z z z z

z z z z

z z z z

z z z z z

39

3 Upper
case: W
Lower
3 case: DW

124

4 Lower
case: W

80

4 *3
Upper
case: B

73

4 Lower
case: W

139

4 *3
Upper
case: B

120

4 Lower
case: W

27

2 Upper
case: B
2 Middle
case: W
2 Lower
case: DW
2 Upper
case: W

22

29
↕

3 Upper
case: W
Lower
3 case: DW

4 *3
Upper
case: B

28
z z z z z

Remarks

153

22

[Double word]
DY, DR, DM
z z z z
Stores the absolute value of [Word]
s in d, and the sign value of d: WY, WR, WM
s in carry (R7F0).
s: WX, WY, WR,
(0: Positive, 1: Negative)
WM, TC,
Constant
[Double word]
d: DY, DR, DM
s: DX, DY, DR,
DM, Constant

5-9

40

Steps

R7F0
C

z z z z z
[Double word]
d: DY, DR, DM
n: WX, WY, WR,
←0 WM, TC,
constant

Two's
Stores two's complement of
complement the value stored in I/O
number d, in d.

Absolute
value

V

32

d

d

Process
time
(µ s)

z z z z z
[Word]
d: WY, WR, WM,
TC
n: WX, WY, WR,
WM, TC,
Constant

0→

BCD shift
left

R7F1

DER ERR SD

BCD shift
right

Shifts BCD to right by n
digits.
11 BSL(d, n)

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Shift/rotate Classification
Item number

Chapter 5 Instruction Specifications

30
41

2 Lower
case: DW
3 Upper
case: W
4 Lower
case: DW

21 ENCO(d, s, n)

R7F0

V

C

MICRO-EH

z z z z

d: R, M
↕
s: WX, WY, WR,
WM, TC,
Constant
n: Constant(1-8)

d: WY, WR, WM ↕
s: R, M
n: Constant(1-8)

79
89

z z z z

49

Steps

R7F1

R7F2

R7F3

DER ERR SD

[Word]
↕
d: WY, WR, WM
s: WX, WY, WR,
WM, TC,
Constant
[Double word]
↕
d: DY, DR, DM
s: DX, DY, DR,
DM, Constant

Remarks

3 Upper
case: W
Lower
4 case: DW

75

3 Upper
case: W
Lower
4 case: DW

z z z z

105

4 *3

z z z

↕

128

4 *3

R7F0

20 DECO(d, s, n)

I/O types used

Process
time
(µ s)

R7F1

19 BIN(d, s)

Process
time
(µ s)

V

C

MICRO-EH

DER ERR SD

Bit count

23 SWAP(d)

Swap

24 UNIT(d, s, n)

Unit

25 DIST(d, s, n)

Distribute

z z
[Word]
d: WY, WR, WM
s: WX, WY, WR,
WM, TC,
Constant
[Double word]
d: WY, WR, WM
s: DX, DY, DR,
DM, Constant
Swaps the upper 8 bits and d: WY, WR, WM z z
the lower 8 bits of the value
(word) for I/O number d.
Stores the lower 4 bit
d: WY, WR, WM ↕ z
values of the n words
s: WR, WM
starting with s in the lower n: Constant(0-4)
4 bits each of d (word).
Extracts the value of s
d: WR, WM
↕ z
(word) in 4 bit units from s: WX, WY, WR,
the least significant bits,
WM, TC,
and sets them in the lower 4 Constant
bits of each word starting n: Constant(0-4)
with I/O number d (word).
The upper bits are set to 0.
Among the contents of s
(word, double-word), stores
the number of bits that are
set to 1 in I/O number d.

Processing time when n = 1

5-10

z z z

Steps

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Application instruction Classification
Item number

Processing time when n=1.

22 BCU(d, s)

*4:

Process descriptions

Binary → Converts the value of s into
BCD and stores it in I/O
BCD
conversion number d. If the value of s
is an error, DER (R 7F4) =
1 is set.
Converts the value of s into
BCD →
binary and stores it in I/O
Binary
conversion number d. If the value of s
is an error, DER (R 7F4) =
1 is set.
Decode
Decodes the value indicated
by the least significant n
bits of s, and sets the bit
that corresponds to the
decoding result of the bit
row starting from I/O
number d, to 1.
Encode
Encodes the bit location in
which 1 is set within the bit
row, which starts with I/O
number s and lasts for the
amount of nth power of 2,
and stores it in I/O number
d. If multiple bits that
contain 1 exist, the one
with the upper bit locations
will be encoded.

18 BCD(d, s)

*3:

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Conversion Classification
Item number

Chapter 5 Instruction Specifications

Remarks

33

3

Upper
case: W

42

4

Lower
case: DW

z z z

25

2

z z z

100

4

*4

z z z

87

4

*4

Chapter 5 Instruction Specifications

Indicates the end of a
normal scan.
Re-executes normal scan
from the beginning of the
normal scan when s=1,
while the next instruction is
executed when s=0.
Unconditio- Jumps to LBL n of the
nal jump
same No. n.
Conditional When s=1, jumps to the
jump
LBL n of the same No.;
when s=0, executes the next
instruction.
Label
Indicates the jump
destination of JMP or
CJMP of the same No.
FOR
When s=0, jumps to the
location after the NEXT n
of the same No.; when s is
not 0, executes the next
instruction.
NEXT
Subtracts 1 from the s value
of the FOR n of the same
No. and jumps to FOR n.
Call
Executes the SB n
subroutine subroutine of the same No.
n.
Start
Indicates the start of No. n
subroutine subroutine.
RETURN
Returns from subroutine.

3 JMP n
4 CJMP n (s)

5 LBL n

6 FOR n (s)

7 NEXT n

8 CAL n

9 SB n
10 RTS

SUBROUTIN

11 INT n

Start
interrupt
scan

12 RTI

RETURN
Returns from interrupt
INTERRUPT scan.

Indicates the start of No. n
interrupt scan.

R7F0

V

C

MICRO-EH

None

z z z z z

714

s: X, Y, R, M

z z z z z

5

Steps

R7F1

R7F2

R7F3

Process
time
(µ s)

1
2 *5
2

707
32

*6

n: Constant(0255)
n: Constant(0255)
s: X, Y, R, M

z 1] z z z

n: Constant(0255)

z z z z z

0.5

1

n: Constant(0-49) z 1] z z z
s: WY, WR, WM

33

3

n: Constant(0-49) z 1] z z z

38

2

n: Constant(0-99) z 1] z z z

24

2

n: Constant(0-99) z 1] z z z

0.5

1

None

z z z z z

25

1

n: Constant(0-2,
16-19, 20-27)

z z z z z

0.5

1

None

z z z z z

0.5

1

z 1] z z z

Remarks

3

3 *5

32

*6

R7F0

Process
time
(µ s)

V

C

MICRO-EH

↕

z z z z

80

3

↕

z z z z

80

3

Steps

Data sending and receiving d: WY10
(optional)
s: WR, WM
t: R, M
Data receiving and sending d: WX0
(optional)
s: WR, WM
t: R, M

R7F1

R7F2

I/O types used

DER ERR SD

General
purpose
port
communica
-tion
command

2 RECV 0

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Transfer inst. Classification
Item number

Transfer instructions

1 TRNS 0

Remarks

1 FUN 5 (s)

2 FUN 80 (s)
(ALREF (s))
3 FUN 81 (s)
(IOREF (s))

R7F0

DER ERR SD

General
purpose
port
switching
I/O refresh
(all points)
I/O refresh
(I/O /link
designation
)

R7F1

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

FUN instructions

FUN instructions Classification
Item number

8.

I/O types used

DER ERR SD

Normal
scan end
Scan
conditional
end

2 CEND(s)

7.

Process descriptions

Steps

1 END

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

Control instructions

Control Classification
Item number

6.

Process
time
(µ s)

V

C

MICRO-EH

s: WR,WM

↕

z z z z

114

3

Refreshes all external I/O s: WR,WM
ranges.
Refreshes only the input
s: WR,WM
range, output range or link
range.

↕

z z z z

432

3

↕

z z z z

244

3

Port type switching from
dedicated port to general
purpose port

5-11

Remarks

4 FUN 82 (s)
(SLREF (s))
5 FUN 140 (s)

6 FUN 141 (s)

7 FUN 142 (s)

8 FUN 143 (s)

9 FUN 144 (s)

10 FUN 145 (s)

11 FUN 146 (s)

12 FUN 147 (s)

13 FUN 148 (s)

14 FUN 149 (s)

15 FUN 150 (s)

16 FUN 151 (s)

17 FUN 254 (s)
(BOXC (s))
18 FUN 255 (s)
(MEMC (s))

V

C

MICRO-EH

Steps

Process
time
(µ s)

Refreshes the I/O at the
s: WR, WM
designated slot.
Performs the starting and
s: WR, WM
stopping of the count
operation of the specified
counter.
Performs the enabling and s: WR, WM
disabling of the coincidence
output of the specified
counter.

↕

z z z z

311

3

↕

z z z z

147

3

↕

z z z z

138

3

This controls the upcount/down-count of the
specified counter. (Singlephase counters only)

s: WR, WM

↕

z z z z

156

3

s: WR, WM
s+1: WR, WM

↕

z z z z

175

3

s: WR, WM
s+1: WR, WM

↕

z z z z

132

3

s: WR, WM

↕

z z z z

157

3

s: WR, WM
s+1: WR, WM
s+2: WR, WM

↕

z z z z

162

3

s: WR, WM

↕

z z z z

135

3

s: WR, WM
s+1: WR, WM
s+2: WR, WM

↕

z z z z

173

3

s: WR, WM

↕

z z z z

149

3

s: WR, WM
s+1: WR, WM
s+2: WR, WM

↕

z z z z

217

3

s: WR, WM
s+1: WR, WM
s+2: WR, WM
s+3: WR, WM
s+4: WR, WM
No processing is performed s: WR, WM
in the CPU.
No processing is performed
in the CPU.

↕

z z z z

919

3

z z z z z

—

3

z z z z z

—

3

The counter value of the
specified counter number
will be replaced by the data
stored in the replacement
value storage area.
High-speed This function reads the
counter
count value of the specified
current
counter number and writes
value
it to the current value
reading
storage range
High-speed Clears the count value of the
counter
specified counter number.
current
value clear
High-speed The on-preset value and
counter
off-preset value will be set
preset
according to the preset
specifications in respect to
the specified counter
number.
PWM
Starts PWM output of the
operation
specified PWM output
control
number.
PWM
Sets the frequency value
Frequency and the on-duty value of the
on-duty
PWM output number
changes
specified by the on-duty
value and the specified
frequency value.
Pulse
Starts pulse output of the
output
specified pulse number and
control
the output is stopped when
the specified number of
pulses are output.
Pulse
Pulse output is commenced
frequency at the specified frequency.
output
Output is stopped when the
setting
number of pulses specified
changes
have been output.
Pulse output Divides the time band and
with
frequency into 10 levels
acceleration/ and performs
deceleration acceleration/deceleration.
BOX
comment
Memo
comment

R7F0

DER ERR SD

I/O refresh
(any slot)
High-speed
counter
operation
control
High-speed
counter
coincidence
output
control
High-speed
counter upcount /
down-count
control
High-speed
counter
current value
replacement

R7F1

I/O types used

R7F2

Process descriptions

R7F3

Instruction
name

R7F4

Ladder symbol

Instruction
symbol

FUN instructions Classification
Item number

Chapter 5 Instruction Specifications

5-12

Remarks

Chapter 5 Instruction Specifications

5.3

Instruction Specification Details

(1)

Basic instructions

(2)

Arithmetic instructions

(3)

Application instructions

(4)

Control instructions

(5)

Transfer instructions

(6)

FUN instructions

5-13

Chapter 5 Instruction Specifications

Name

Basic instructions-1, 2

Ladder format

Condition code

Processing time (µs)

LD
LDI

n

R7F4

R7F3

R7F2

R7F1

R7F0

n

DER

ERR

SD

V

C

z

z

z

z

z

n
n

Instruction format

0.9

n

Condition

Steps

LDI

n

—

1

I/O number

Bit
R,

TD, SS,

X

Y

M

CU, CT

{

{

{

{

Word
WR,

Remark

Average Maximum

Number of steps

LD

Usable I/O
n

Logical operation start (LD, LDI)

←

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

Function
n
LD n

Starts the a-contact logical operation. Enters the continuity state when input is on.

n

Starts the b-contact logical operation. Enters the continuity state when input is off.
LDI n

Notes
•
•

Edge detection (DIF, DFN) cannot be used in respect to LDI.
Pay close attention if the external output is to be monitored when counter input (coincidence output), PWM output or pulse
output is set with the PI/O function.
Y100

DIF1
WR0 = WR0 + 1

Y100 will not change while monitored. It will remain the same value previously set using functions such as
set/reset.
For example, if Y100 is off, the Y100 status will not change while being monitored and WRO will also remain
unchanged.

Program example
X00000

Y00100

LD
OUT

X00000
Y00100

X00001

Y00101

LDI
OUT

X00001
Y00101

Program description
•
•

When input X00000 is on, output Y00100 is on; when off, the output is off.
When input X00001 is off, output Y00101 is on; when on, the output is off.

5-14

Chapter 5 Instruction Specifications

Condition code

n

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

n

Instruction format

0.8

n

Condition

Steps

ANI

n



1

I/O number

Bit
R,

TD, SS,

X

Y

M

CU, CT

{

{

{

{

Word
WR,

Remark

Average Maximum

Number of steps

AND

Usable I/O
n

Processing time (µs)

R7F4

n
n

Ladder format

Contact serial connection (AND, ANI)

AND
ANI

Name

Basic instructions-3, 4

←

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

Function
n

Obtains AND of the previous operation result and the a-contact operation.
AND n
n

Obtains AND of the previous operation result and the b-contact operation.
ANI n

Notes
•
•

Edge detection (DIF, DFN) cannot be used in respect to ANI.
Pay close attention if the external output is to be monitored when counter input (coincidence output), PWM output, or pulse
output is set with the PI/O function.
R0

Y100 DIF1
WR0 = WR0 + 1

Y100 will not change when monitored. It will remain the same value previously set using functions such as
set/reset.
For example, if Y100 is off, the Y100 status will not change while being monitored and WRO will also remain unchanged.

Program example

X00002

R010

Y00100

X00003

R011

Y00101

LD
AND
OUT

X00002
R010
Y00100

LD
ANI
OUT

X00003
R011
Y00101

Program description
•
•

When input X00002 and R010 are both on, output Y00100 is on and all others are off.
When input X00003 is on and R011 is off, output Y00101 is on and all others are off.

5-15

Chapter 5 Instruction Specifications

Name

Basic instructions-5, 6

Ladder format

Condition code

Processing time (µs)

OR
ORI

n

R7F4

R7F3

R7F2

R7F1

R7F0

n

DER

ERR

SD

V

C

z

z

z

z

z

n
n

Instruction format

Number of steps

n

Condition

Steps

ORI

n



2

I/O number

Bit
R,

TD, SS,

X

Y

M

CU, CT

{

{

{

{

Word
WR,

Remark

Average Maximum

0.9

OR

Usable I/O
n

Contact parallel connection (OR, ORI)

←

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

Function
n

Obtains OR of the previous operation result and the a-contact operation.
OR n
n

Obtains OR of the previous operation result and the b-contact operation.
ORI n

Notes
•
•

Edge detection (DIF, DFN) cannot be used in respect to ORI.
Pay close attention if the external output is to be monitored when counter input (coincidence output), PWM output, or pulse
output is set with the PI/O function.
R0

DIF1
WR0 = WR0 + 1

Y100

Y100 will not change when monitored. It will remain the same value previously set using functions such as
set/reset.
For example, if Y100 is off, the Y100 status will not change while being monitored and WRO will also remain unchanged.

Program example
X00000

X00001

Y00105
LD
OR
ORI
OUT

X00000
X00001
X00002
Y00105

X00002

Program description
•

When X00000 is on, X00001 is on, or X00002 is off, the operation is “1” and Y00105 turns on.

5-16

Chapter 5 Instruction Specifications

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Instruction format

X

Y

0.8

Condition

Steps



2

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Remark

Average Maximum

Number of steps

NOT

Usable I/O

Negation (NOT)

NOT

Name

Basic instructions-7



Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

Function
•

Reverses the operation result obtained up to that point.

Program example
X00000

X00001

R100

LD
AND
NOT
OUT

X00000
X00001
R100

Program description
•
•

When input X00000 and input X00001 are both on, the operation is “1,” but due to
and R100 turns off.
In all other cases, R100 turns on.

5-17

, the calculation turns into “0”

Chapter 5 Instruction Specifications

Name

Basic instructions-8

Ladder format

Condition code

AND
OR

R7F4

R7F3

R7F2

R7F1

R7F0

DIF n

DIF n

DER

ERR

SD

V

C

z

z

z

z

z

DIF
DIF

DIF n

n
n

Number of steps

AND DIF n

Condition

Steps

OR

AND DIF n

3

OR DIF n

4

DIF n

Usable I/O

X

Y

Bit
R,

TD, SS,

M

CU, CT

Remark

Processing time (µs)

DIF n

Instruction format

n

Leading edge detection (AND DIF, OR DIF)

Word
WR,

Average

Maximum

1.0

←

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

Number

Other
0 to 511 (Decimal)

Function
•

Detects the rise of an input signal and retains the operation result only for one scan.
( ) indicates the display when the Ladder Editor is used.
Notes

•
•

DIF number may not be overlapped. (However, no error is generated even if overlapped numbers are used.)
DIF cannot use the b contact.

Program example
X00000

DIF0

R123

LD
AND
OUT

X00000
DIF0
R123

Program description
Time chart
X00000
R123
1 scan time

•
•

Upon leading of X00000 on, R123 turns on only for one scan.
If b-contact is used for X00000, operation will be the same as the a-contact DFN operation.

5-18

Chapter 5 Instruction Specifications

Name

Ladder format
DFN n

DFN n

DFN n

DFN n

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Number of steps

DFN n

Steps

AND DFN n

3

OR DFN n

4

Usable I/O
n

X

Y

Bit
R,

TD, SS,

M

CU, CT

Average Maximum

1.0

Condition

AND DFN n

Remark

Processing time (µs)

R7F4

Instruction format
OR

Trailing edge detection (AND DFN, OR DFN)

Word
WR,

←

Double word
DR,

WX WY WM TC DX DY DM

{

Number

AND DFN n
OR DFN n

Basic instructions-9

Constant

Item number

Other
0 to 511 (Decimal)

Function
•

Detects the fall of an input signal and retains the operation result only for one scan.
( ) indicates the display when the Ladder Editor is used.
Notes

•
•

DFN number may not be overlapped. (However, no error is generated even if overlapped numbers are used.)
DFN cannot use the b contact.

Program example
X00000

DFN0

R124

LD
AND
OUT

X00000
DFN0
R124

Program description
Time chart
X0
R124
1 scan time

•
•

Upon a fall of X00000, R124 turns on only for one scan.
If b-contact is used for X00000, operation will be the same as the a-contact DIF operation.

5-19

Chapter 5 Instruction Specifications

Name

Basic instructions-10

Ladder format

Condition code

n

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

OUT

R7F3

n

I/O number

X

1.0

Condition

Steps



1

Bit
R,

TD, SS,

Y

M

CU, CT

{

{

{

Word
WR,

WX WY WM TC DX DY DM

Switches on the coil when the operation result obtained up to that point is “1.”
Switches off the coil when the operation result obtained up to that point is “0.”
Notes

•

L becomes the internal output when link modules are not used.

Program example
X00000

X00001

Y00100
LD
OUT

X00000
Y00100

LD
OUT
OUT

X00001
Y00101
Y00102

Y00101

Y00102

Program description
•
•

←

Double word
DR,

Function
•
•

When input X00000 is on, the operation is “1” and Y00100 turns on.
When input X00001 is on, the operation is “1,” and Y00101 and Y00102 turn on.

5-20

Remark

Average Maximum

Number of steps

OUT n

n

Processing time (µs)

R7F4

Instruction format

Usable I/O

Coil output (OUT)

Constant

Item number

Other

Chapter 5 Instruction Specifications

SET
n
RES

n
S
n
R

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

SET
RES

Instruction format

n

Condition

Steps

RES n



1

I/O number

Average Maximum

Upper case: SET
0.9

←

0.9

←

Lower case: RES

Number of steps

SET n

Usable I/O

Remark

Processing time (µs)

R7F4

n
n

Ladder format
n

Set/reset coil output (SET, RES)

X

Bit
R,

TD, SS,

Y

M

CU, CT

{

{

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Other

Function
n
SET
SET n

Switches on the device when the operation result obtained up to that point is “1.”
The device that is switched on will not be switched off even if the operation result is “0.”

n
RES
RES n

Switches off the device when the operation result obtained up to that point is “1.”
( ) indicates the display when the Ladder Editor is used.

Notes
•

When a set/reset coil is used on a multi-layer coil, it must be set to the highest level or an arbitrary contact must be entered
immediately before the use.
Example of OK

Example of NG
SET
SET

SET
SET

SET

Program example
X00000

R100
SET

X00001

R100
RES

LD
SET
LD
RES

X00000
R100
X00001
R100

Program description
•
•
•

When input X00000 turns on, output R100 turns on. Even if X00000 turns off, R100 remains on.
When input X00001 turns on, output R100 turns off.
When input X00000 and X00001 both turn on, the one executed later than the other during programming takes a higher
priority.

5-21

SET
RES

Name

Basic instructions-11, 12

Constant

Item number

Chapter 5 Instruction Specifications

Name

Basic instructions-13, 14

Ladder format
MCS
MCR

MCS n

MCS n
S

MCR n

MCR n
R

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

n
n

Instruction format

Remark

Average Maximum

Upper case: MCS
0.7

←

0.7

←

Lower case: MCR

Number of steps

MCS n

Condition

Steps

MCR n

MCS n

3

MCR n

2

Usable I/O
n

Set (start)/reset (cancel) master control (MCS, MCR)

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,
DL,
WX WY WM TC DX DY
DM

Constant

Item number

{

Number

Other
0 to 49 (Decimal)

Function
•
•

Controls the input to the circuit sandwiched by the master control set (MCS n) and reset (MCR n).
(An AND operation is performed with respect to each input and MCS.)
The master control can be used up to eight layers.
( ) indicates the display when the Ladder Editor is used.
Notes

•

Always use the master control MCS and MCR in pairs.

Program example
MCS0
X00000

MCS1

X00001

Y00100
MCR1

LD
MCS1
LD
OUT
MCR1

X00000

MCS1

X00001
Y00100

MCS2
MCR2

Up to eight layers
are allowed.

MCR1
MCR0

Program description
X00000
X00001
Y00100

•
•

When input X00000 is on, the circuits surrounded by MCS and MCR obeys input X00001, and output Y00100 turns on/off.
When input X00000 is off, the circuits surrounded by MCS and MCR are independent of input X00001, and output Y00100
turns off.

5-22

Chapter 5 Instruction Specifications

Ladder format

Save/read/clear operation result (Branching of ladder)

Condition code

Processing time (µs)

Save

R7F4

R7F3

R7F2

R7F1

R7F0

Read

DER

ERR

SD

V

C

Clear

z

z

z

z

z

Instruction format



Number of steps

MPS

Save

Condition

Steps

MRD

Read



0

MPP

Clear

Usable I/O

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Remark

Average Maximum

MPS Save
MRD Read
MPP Clear

Name

Basic instructions-15, 16, 17



Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

Function

X00100

R001

Y00101
R002

•
•
•

Y00102

R003

Y00103

R004

Y00104

LD
MPS
AND
MPS
OUT
MPP
AND
OUT
MRD
AND
OUT
MPP
AND
OUT

X00100
R001
Y00101
R002
Y00102
R003
Y00103
R004
Y00104

MPS stores the previous operation result. (Push)
MRD reads the results stored by the MPS and continues operation.
MPP reads the results stored previously by the MPS and continues operation, then clears the results after operation. (Pull)

5-23

Chapter 5 Instruction Specifications

Name

Basic instructions-18

Ladder format

Condition code

Processing time (µs)

ANB

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

(See Function column)
Instruction format

Condition

Steps



0

X

Bit
R,

TD, SS,

M

CU, CT

Y

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Function
X00001

R010

M0020 M0021

R011

M0022

Y00100

LD X00001
LD R010
OR R011
ANB
LD M0020
AND M0021
OR M0022
ANB
OUT Y00100

This instruction is used to perform AND operation with respect to the logical operation blocks (dotted line area).

5-24

Remark

Average Maximum



Number of steps

ANB

Usable I/O

Logical block serial connection (ANB)

Constant

Item number

Other

Chapter 5 Instruction Specifications

Name

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

(See Function column)
Instruction format

Number of steps
Steps



1

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Function
X00000

R010

Y00105

R011 R012

X00001

LD X00000
LD R010
LD R011
AND R012
ORB
OR X00001
ANB
OUT Y00105

This instruction is used to perform OR operation with respect to the logical operation blocks (dotted line area).

5-25

Remark

Average Maximum

0.7

Condition
ORB

Usable I/O

Logical block parallel connection (ORB)

ORB

Basic instructions-19

Constant

Item number

Other

Chapter 5 Instruction Specifications

Name

Basic instructions-20

Ladder format

Condition code

[

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

]

Number of steps
Condition

Steps

—

3

]

Usable I/O

Processing time (µs)

R7F4

Instruction format
[

Processing box start and end (PROCESSING BOX)

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Average

Maximum

0.6



Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Function
•

Indicates the start and end of the processing box.
X00001
WY0010=WX0000

•

LD X00001
[
WY0010=WX0000
]

In the above example, the operation inside the processing box will be executed when input X00001 is on.

Parallel connection of processing box or coil is not allowed.

Not allowed

Allowed

Not allowed

Allowed

5-26

Remark

Other

Chapter 5 Instruction Specifications

Name

Basic instructions-21

Ladder format

Condition code
R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Condition

Steps

—

0

)

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,


z

Double word
DR,

WX WY WM TC DX DY DM

Function
•

0.8

Indicates the start and end of the relational box.

5-27

)

Number of steps

Remark

Average Maximum

(

R7F3

Instruction format

Usable I/O

Processing time (µs)

R7F4
z

(

Relational box start and end (RELATIONAL BOX)

Constant

Item number

Other

Chapter 5 Instruction Specifications

Name

Basic instructions-22

Ladder format

Condition code

OUT TD n t s

TD n

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Instruction format

Timer number

t

Time base

s

Set value

X

Y

1.4

Condition

Steps



5

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Remark

Average Maximum

Number of steps

OUT TD n t s

Usable I/O

Processing time (µs)

R7F4
txs

n

On delay timer (ON DELAY TIMER)



Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

Other
0 to 255 (Decimal)
.01s, .1s, 1s

{

{

{

{

1 to 65535 (Decimal)

Function
•
•
•
•
•

The progress value is updated when the startup condition is on, and the coil turns on when the progress value is greater than
or equal to the set value.
If the startup condition is turned off, the progress value is cleared and the coil turns off.
The progress value is set in TC n and does not exceed 65535 (decimal).
If the progress value is updated during RUN, the operation will be performed using the new progress value at that point.
If an I/O is set for the set value, the set value can be changed during operation by changing the I/O value, since the set values
are updated during each scan.
Notes

•
•
•

The .01s time base can only be used for timer numbers 0 to 63 (64 points).
The .1 s and 1 s time bases can be used for all timer numbers (0 to 255).
A maximum of 256 points can be used for the timers TD, SS, CU, CTU and CTD in total.
However, the same area as the counter is used. The timer numbers and counter numbers may not be overlapped.

Program example
X00000

TD10
0.01S 12345

TD10

•

R100

LD
OUT
LD
OUT

X00000
TD10 0.01S 12345
TD10
R100

An example of a word I/O being used as the set value for the circuit shown above.
R7E3
WR0010=12345
X00000

TD10

TD10

R100

0.01S WR0010

LD
R7E3
[
WR0010=12345
]
LD
X00000
OUT
TD10 0.01S WR0010
LD
TD10
OUT
R100

5-28

Chapter 5 Instruction Specifications

[Time chart]
1]
2]
3]
4]

X00000
TD10
R100
Set value

65 535

5]

12345

When input X00000 turns on, TD progress value is updated.
When input X00000 turns off, the TD progress value is cleared.
TD10 turns on when progress value ≥ set value.
While X00000 is on, the progress value increases, but will not
increase exceeding 65535.
When X00000 turns off, TD10 also turns off and the progress value
is cleared.

Progress value
of TD10 (TC10)
1]

•

2]

3] 4] 5]

Example using word I/O as the set value
When RUN is commenced, the set value is set to the word I/O.
Or, the word I/O for the set value is designated to store in the power failure memory.

5-29

OUT TD n t s

Program description

Chapter 5 Instruction Specifications

Name

Basic instructions-23

Ladder format

Single shot (SINGLE SHOT)

Condition code

OUT SS n t s

SS n

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

txs

Instruction format

Number of steps

1.4

Condition

Steps



5

OUT SS n t s
Bit
Usable I/O
X
n

Timer number

t

Time base

s

Set value

Y

Remark

Average Maximum



Word
Double word
TD, SS,
WDT, MS,
WR,
DR,
R, TMR, CU,
M RCU, CT WX WY WM TC DX DY DM

Constant

Item number

{

Other
0 to 255 (Decimal)
.01s, .1s, 1s

{

{

{

{

1 to 65535 (Decimal)

Function
•
•
•
•
•

Detects the leading edge of the startup condition, starts updating progress values, and turns on the coil.
The coils turns off when the progress value is greater than or equal to the set value. If a leading edge is detected while the
progress value is less than the set value, the progress value is set to 0 and the counter is reset.
The progress value is set in TC n and does not exceed 65535 (decimal).
If the progress value is updated during RUN, the operation will be performed using the new progress value at that point.
If an I/O is set for the set value, the set value can be changed during operation by changing the I/O value, since the set values
are updated during each scan.
Notes

•
•
•
•

The .01 s time base can only be used for timer numbers 0 to 63 (64 points).
The .1 s and 1s time bases can be used for all timer numbers (0 to 255).
A maximum of 256 points can be used for the timers TD, SS, CU, CTU and CTD in total.
However, the same area as the counter is used. Timer number and counter number may not be overlapped.
Since the startup condition of a single shot is edge detection, the condition for one scan cannot be detected during the first
scan after RUN starts.

Program example
X00001

SS11
0.01S 12567

SS11

•

R101

LD
OUT
LD
OUT

X00001
SS11 0.01S 12567
SS11
R101

An example of a word I/O being used as the set value for the circuit shown above.
R7E3
WR0011=12567
X00001

SS11

SS11

R101

0.01S WR0011

LD
R7E3
[
WR0011=12567
]
LD
X00001
OUT
SS11 0.01S WR0011
LD
SS11
OUT
R101

5-30

Chapter 5 Instruction Specifications

[Time chart]

1]
2]

X00001
SS11
R101
Set value

4]

12 567

Progress
value of SS11
(TC11)
1]

•

3]

2]

3]

4]

The progress value is updated and SS11 turns on at the leading edge
of X00001.
SS11 turns off when set value ≥ progress value.
X00001 is turned on at this time, but the single shot startup
conditions are ignored because it uses edge trigger.
SS11 is turned on at the leading edge of X00001 again, and the
progress value is updated.
When the leading edge of X00001 is detected while the progress
value does not reach the set value, the single shot timer is triggered
again and the progress value returns to 0, then starts increasing. The
SS11 remains on.

Example using word I/O as the set value
When RUN is commenced, the set value is set to the word I/O.
Or, the word I/O for the set value is designated to store in the power failure memory.

5-31

OUT SS n t s

Program description

Chapter 5 Instruction Specifications

Name

Basic instructions-24

Ladder format

Condition code

OUT

CU n

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

CU n
s

Instruction format

Counter number

s

Set value

X

Y

1.4

Condition

Steps

—

5

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

{

{

Remark

Average Maximum

Number of steps

OUT CU n s

n

Processing time (µs)

R7F4
s

Usable I/O

Counter (COUNTER)

{

Constant

Item number

Other

{

0 to 255 (Decimal)

{

1 to 65535 (Decimal)

Function
•
•
•
•

Increments the progress value by 1 each time the leading edge of the startup condition is detected, and switches on the coil
when the progress value is greater than or equal to the set value. The coil that is switched on turns off when the counter
clear CL n is switched on, and the progress value is cleared to 0.
The progress value is set in TC n and does not exceed 65535 (decimal).
If the progress value is updated while the system is running, the operation will be performed using the new progress value at
that point.
If an I/O is set for the set value, the set value can be changed during operation by changing the I/O value, since the set values
are updated during each scan.
Notes

•
•
•
•
•

A maximum of 256 points can be used for the timers and counters TD, SS, CU, CTU and CTD in total.
The timer numbers and counter numbers can not be overlapped.
While the counter clear CL n is on, the rise of startup condition is ignored.
Since the startup condition of the counter is edge detection, the condition for one scan can not be detected during the first
scan after RUN starts.
If the set value is set to 0, it is regarded as a coil that is always on and controlled by the CL n.

Program example
X00005

CU15

X00006

CL15

CU15

R105

4

•

LD
OUT
LD
OUT
LD
OUT

X00005
CU15 4
X00006
CL15
CU15
R105

An example of a word I/O being used as the set value for the circuit shown above.
R7E3
WR0015=4
X00005

CU15

X00006

CL15

CU15

R105

WR0015

LD
R7E3
[
WR0015=4
]
LD
X00005
OUT
CU15 WR0015
LD
X00006
OUT
CL15
LD
CU15
OUT
R105

5-32

Chapter 5 Instruction Specifications

Ignored

X00005
CL15
CU15
65 535
5

Set value 4
Progress
value of
CU15 (TC15)

4
3

3
2
1
1]

•

2]

3]

4]

5]

Example using word I/O as the set value
When RUN is commenced, the set value is set to the word I/O.
Or, the word I/O for the set value is designated to store in the power failure memory.

5-33

CU n

Ignored

1] The progress value (count) is cleared to 0 by the counter
clear (CL15). While the counter clear is on, the progress
value will not be updated.
2] The progress value is updated at the leading edge of
X00005.
3] Counter coil (CU15) is turned on since the progress value ≥
set value.
4] The count value will not exceed 65535 (decimal).
5] The progress value and counter coil are cleared by counter
clear (CL15).
• The clear is performed under the conditions set immediately
prior to the execution of the counter coil instruction.

OUT

[Time chart]

s

Program description

Chapter 5 Instruction Specifications

Name

Basic instructions-25, 26

OUT CTU n s
OUT CTD n

Ladder format

Up (CTU n) and down (CTD n) of up/down counter
(UP/DOWN COUNTER)

Condition code

Processing time (µs)

CTU n s

R7F4

R7F3

R7F2

R7F1

R7F0

CTD n

DER

ERR

SD

V

C

z

z

z

z

z

Instruction format
OUT CTD n

n

Counter number

s

Set value

Upper case: CTU
1.4



1.4



Lower case: CTD

Number of steps

OUT CTU n s

Usable I/O

Remark

Average Maximum

X

Y

Condition

Steps

CTU

5

CTD

3

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

Constant

Item number

Other

{

0 to 255 (Decimal)

{

1 to 65535 (Decimal)

Function
•

•
•
•

For the UP counter, increments the progress value by 1 each time the leading edge of the startup condition is detected, while
it decrements the progress value by 1 for the DOWN counter. The coil switches on when the progress value is greater than
or equal to the set value and switches off when the progress value is less than the set value. When the counter clear CL n
switches on, the progress value is cleared to 0 and the coil switches off.
The progress value is set in TC n, and the value will be in the range of 0 to 65535 (decimal).
If the progress value is updated during RUN, the operation will be performed using the new progress value at that point.
If an I/O is set for the set value, the set value can be changed during operation by changing the I/O value, since the set values
are updated during each scan.
Notes

•
•
•
•
•
•

A maximum of 256 points can be used for the timers and counters TD, SS, CU, CTU and CTD in total.
The timer numbers and counter numbers cannot be overlapped.
The numbers for the UP coil and DOWN coil must be the same.
While the counter clear CL n is on, the rise of startup condition is ignored.
Since the startup condition of the counter is edge detection, the condition for one scan may not be detected during the first
scan after RUN starts.
If the set value is set to “0”, it is regarded as a coil that is always on and controlled by the CL n.

5-34

Chapter 5 Instruction Specifications

X00007

CTU17

LD
OUT
LD
OUT
LD
OUT
LD
OUT

4

•

X00008

CTD17

X00009

CL17

CT17

R107

X00007
CTU17 4
X00008
CTD17
X00009
CL17
CT17
R107

z

An example of a word I/O being used as the set value for the circuit shown above.
R7E3
WR0017=4
X00007

CTU17
WR0017

X00008

CTD17

X00009

CL17

CT17

R107

LD
R7E3
[
WR0017=4
]
LD
X00007
OUT
CTU17 WR0017
LD
X00008
OUT
CTD17
LD
X00009
OUT
CL17
LD
CT17
OUT
R107

Program description
[Time chart]
Ignored

Ignored

X00007

Ignored

X00008
CL17
CT17

65 535
65 534

Set value

5

=4

4
3

5
4

4
3

2
Progress value
(TC17)

3
2
0

1
1]

1] The progress value (count value) is
up-counted at the leading edge of
X00007.
2] The counter coil (CT17) is turned on
when the progress value ≥ set value.
3] When the up-coil and down-coil
startup conditions turn on
simultaneously, the progress value
does not change.
4] The progress value is down-counted
at the leading edge of X00008.
5] The counter coil turns off when set
value > progress value.

2]

3] 4] 5]

7]

6]

6]

6] The progress value will not exceed 65535 (decimal). Also, it will not be below 0.
7] When the counter clear (CL17) turns on, the progress value and the counter coil are cleared. The progress value is not
updated while the counter clear is on.
• The clear is performed under the conditions set immediately before execution of the counter coil instruction.
• Example using the word I/O as the set value
When RUN is commenced, the set value is set to word I/O.
Or, the word I/O for the set value is designated to store in the power failure memory.

5-35

OUT CTU n s
OUT CTD n

Program example

Chapter 5 Instruction Specifications

Name

Basic instructions-27

Ladder format

Condition code

OUT

CL n

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

CL n

R7F3

s

Number of steps
Steps

—

1

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

{

Counter number

Remark

Average Maximum

0.9

Condition
OUT CL n s

n

Processing time (µs)

R7F4

Instruction format

Usable I/O

Counter clear (COUNTER CLEAR)

Constant

Item number

Other
0 to 255 (Decimal)

Function
•
•
•
•

Clears the progress values of the integral timer and switches off the timer coil.
In the case of WDT, the time monitor check is performed (see WDT for details).
In the case of counters, the progress value is cleared and the counter coil is switched off.
The clearing operation is conducted immediately before execution of the counter or timer coil instruction indicated by the
clear coil.

Example:
X00000

CL10

X00001

CU10

X00002

CL10

1) When X00000 is turned on, the CL10 immediately prior to CU10, and CU10
is cleared.
2) Even if X00002 turns on, if X00001 is off, the CL10 is turned off by the
circuit before CU10 is executed. Thus, the CU10 will not be cleared.

Notes
•

The same number should be used for the timer number and counter number.

5-36

Chapter 5 Instruction Specifications

Name

Ladder format

=Relational box (=RELATIONAL BOX)

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

(See Function column)
Instruction format

Upper case: W
27

40

35

50

Lower case: DW

Number of steps

LD

(s1 == s2)

Condition

Steps

AND

(s1 == s2)

Word

(See Notes)

OR

(s1 == s2)

Double word

(See Notes)

Usable I/O

Remark

Average Maximum

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

s1

Relational number 1

{

{

{

{

{

{

{

{

s2

Relational number 2

{

{

{

{

{

{

{

{

Other

Function
[Ladder format]

•
•

s1
==
s2

s1
==
s2

s1
==
s2

Compares s1 and s2 as unsigned numbers, and
if s1 is equals to s2, it enters the continuity status (on) and
if s1 is not equal to s2, enters the noncontinuity status (off).
When s1 and s2 are words:
0 to 65535 (decimal) or H0000 to HFFFF (hexadecimal)
When s1 and s2 are double words: 0 to 4294967295 (decimal) or H00000000 to HFFFFFFFF (hexadecimal)
Notes

[Number of steps]
Word
LD

Double word

(s1 == s2)

5 steps

I/O

I/O

OR (s1==s2)

5 steps

6 steps

AND (s1 == s2)

5 steps

I/O

Constant

6 steps

7 steps

OR

6 steps

Constant

I/O

6 steps

7 steps

Constant

Constant

7 steps

8 steps

(s1 == s2)

Program example
WR0000
==

R001

LD
OUT

(WR0000 == WR0002)
R001

WR0002

Program description
•

LD, AND (s1==s2)

When WR0000 = WR0002, R001 turns on.

5-37

LD
(s1 == s2)
AND (s1 == s2)
OR (s1 == s2)

Basic instructions-28

Constant

Item number

Chapter 5 Instruction Specifications

Name

Basic instructions-29

Ladder format

Condition code

LD
(s1 == s2)
AND (s1 == s2)
OR (s1 == s2)

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Command format

35

(s1 S== s2)

Condition

Steps

AND

(s1 S== s2)

Double word

(See Cautionary notes)

OR

(s1 S== s2)

Usable I/O

Average Maximum

Number of steps

Bit
X

Y

R,
L,
M

Word
TD, SS,
CU, CT

Remark

Processing time (µs)

R7F4
(See Function column)

LD

Signed = Relational box (SIGNED = RELATIONAL BOX)

50

Double word

WR,

DR,

WX WY WM TC DX DY DM

Constant

Item number

s1

Relational number 1

{

{

{

{

s2

Relational number 2

{

{

{

{

Other

Function
[Ladder format]

z

z

s1
S==
s2

s1
S==
s2

b31

Compares s1 and s2 as signed double-word numbers, and
if s1 is equals to s2, it enters the continuity status (on) and
if s1 is not equal to s2, enters the noncontinuity status(off).
s1, s2

s1
S==
s2

Sign bit: 0 - Positive; 1 - Negative

– 2147483648 to + 2147483647 (decimal)
H80000000 to H7FFFFFFF (hexadecimal)

Cautionary notes
[Number of steps]
Double word

LD, AND (s1S==s2)

OR (s1S==s2)

I/O

I/O

5 steps

6 steps

I/O

Constant

6 steps

7 steps

Constant

I/O

6 steps

7 steps

Constant

Constant

7 steps

8 steps

Program example
DR0000
S==
DR0002

R002

LD
OUT

(DR0000 S== DR0002)
R002

Program description
z

When DR0000 = DR0002, R002 turns on (signed).

5-38

b0

Chapter 5 Instruction Specifications

Name

Ladder format

<> Relational box (<> RELATIONAL BOX)

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

(See Function column)
Instruction format

Average Maximum

Upper case: W
26.8

40

34.5

50

Lower case: DW

Number of steps

LD

(s1 <> s2)

Condition

Steps

AND

(s1 <> s2)

Word

(See Notes)

OR

(s1 <> s2)

Double word

(See Notes)

Usable I/O

Remark

Processing time (µs)

R7F4

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

s1

Relational number 1

{

{

{

{

{

{

{

{

s2

Relational number 2

{

{

{

{

{

{

{

{

Other

Function
[Ladder format]

•
•

s1
<>
s2

s1
<>
s2

s1
<>
s2

Compares s1 and s2 as unsigned numbers, and
if s1 is equals to s2, it enters the noncontinuity status (off) and
if s1 is not equal to s2, enters the continuity status (on).
When s1 and s2 are words:
0 to 65535 (decimal) or H0000 to HFFFF (hexadecimal)
When s1 and s2 are double words:
0 to 4294967295 (decimal) or H00000000 to HFFFFFFFF (hexadecimal)
Notes

[Number of steps]
Word

Double word

OR (s1<>s2)

LD

(s1 <> s2)

5 steps

I/O

I/O

5 steps

6 steps

AND

(s1 <> s2)

5 steps

I/O

Constant

6 steps

7 steps

OR

(s1 <> s2)

6 steps

Constant

I/O

6 steps

7 steps

Constant

Constant

7 steps

8 steps

Program example
WR0000
< >

R003

LD
OUT

(WR0000 < > WR0002)
R003

WR0002

Program description
•

LD, AND (s1<>s2)

When WR0000 ≠ WR0002, R003 turns on.

5-39

LD
(s1 <> s2)
AND (s1 <> s2)
OR (s1 <> s2)

Basic instructions-30

Constant

Item number

Chapter 5 Instruction Specifications

LD
(s1 S <> s2)
AND (s1 S <> s2)
OR (s1 S <> s2)

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Command format
(s1 S<> s2)

Condition

Steps

AND

(s1 S<> s2)

Double word

(See Cautionary notes)

OR

(s1 S<> s2)

Usable I/O

X

Y

R,
L,
M

Word
TD, SS,
CU, CT

Average Maximum

34.5

Number of steps

Bit

Remark

Processing time (µs)

R7F4
(See Function column)

LD

Signed <> Relational box (SIGNED <> RELATIONAL
BOX)

Name

Basic instructions-31

50

Double word

WR,

DR,

WX WY WM TC DX DY DM

Constant

Item number

s1

Relational number 1

{

{

{

{

s2

Relational number 2

{

{

{

{

Other

Function
[Ladder format]

z

z

s1
S<>
s2

s1
S<>
s2

b31

Compares s1 and s2 as signed double-word numbers, and
if s1 is equals to s2, it enters the noncontinuity status (off) and
if s1 is not equal to s2, enters the continuity status (on).
s1, s2

s1
S<>
s2

Sign bit: 0 - Positive; 1 - Negative

– 2147483648 to + 2147483647 (decimal)
H80000000 to H7FFFFFFF (hexadecimal)

Cautionary notes
[Number of steps]
Double word
I/O

LD, AND (s1S<>s2)

OR (s1S<>s2)

5 steps

6 steps

I/O

I/O

Constant

6 steps

7 steps

Constant

I/O

6 steps

7 steps

Constant

Constant

7 steps

8 steps

Program example
DR0000
S< >
DR0002

R004

LD
OUT

(DR0000 S < > DR0002)
R004

Program description
z

When DR0000 ≠ DR0002, R004 turns on (signed).

5-40

b0

Chapter 5 Instruction Specifications

Name

Ladder format

 s2
Instruction format
d = s1 <> s2

Condition

Steps

s is a word

4

s is a double Word

6

Bit

60



46



X

Word

R,

TD, SS,

Y

M

CU, CT

{

{

Double word

WR,

DR,

WX WY WM TC DX DY DM

d

Substitution destination

s1

Comparand

{

{

{

{

{

{

{

{

s2

Relational number

{

{

{

{

{

{

{

{

Function
•

Substitutes 1 when s1 is not equal to s2 and otherwise 0 into d, assuming s1 and s2 as binary data.
Notes

•

The combinations of d, s1 and s2 are as follows:
d

s1

s2

Bit

Word

Word

Bit

Double word

Double word

Program example
[
Y00000= WR0000 < > WR0001
]

Y00000= WR0000 < > WR0001

Program description
•

Remark

Average Maximum

Number of steps

d = s1 <> s2

Usable I/O

<> Relational expression

Constant

Item number

When WR0000 ≠ WR0001, “1” is set in Y00000. Otherwise, Y00000 is reset to “0.”

5-62

Other

Chapter 5 Instruction Specifications

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Command format

Steps

s is a double word

6

Bit
X

Substitution destination

R,
L,
M

Y
{

Word
TD, SS,
CU, CT



48

Condition

Remark

Average Maximum

Number of steps

d = s1 S<> s2

d

Processing time (µs)

R7F4
d = s1 S<> s2

Usable I/O

Signed <> Relational expression

d = s1 S<> s2

Name

Arithmetic instructions-18

Double word

WR,

DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

{

s1

Comparand

{

{

{

{

s2

Relational number

{

{

{

{

Function
z
z

Substitutes 1 when s1 is not equal to s2 and otherwise 0 into d, assuming s1 and s2 as signed binary data.
s1 and s2 are both signed binary data. When the most significant bit is 0, the value is positive; when the most significant
bit is 1, the value is negative.
s1, s2
– 2147483648 to +2147483647 (decimal)
H80000000 to H7FFFFFFF (hexadecimal)
b31

b16 b15

b0

Sign bit: 0 - Positive; 1 - Negative

Program example
Y00100 = DR0000 S<> DR0002

[
Y00100 = DR0000 S<> DR0002
]

Program description
z

When the values of DR0000 and DR0002 are not equal, Y00100 is turned on. Otherwise, Y00100 is turned off.

5-63

Chapter 5 Instruction Specifications

Name

Arithmetic instructions-19

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

d = s1 < s2
Instruction format

Upper case: W

d = s1 < s2

40



70



Lower case: DW

Condition

Steps

s is a word

4

s is a double word

6

X

Bit
R,

TD, SS,

Y

M

CU, CT

{

{

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

d

Substitution destination

s1

Comparand

{

{

{

{

{

{

{

{

s2

Relational number

{

{

{

{

{

{

{

{

Function
•

Substitutes “1” when s1 is less than s2 and otherwise “0” into d, assuming s1 and s2 as binary data.
Notes

•

The combinations of d, s1 and s2 are as follows:
d

s1

s2

Bit

Word

Word

Bit

Double word

Double word

Program example
[
R0 = TC100 < TC101
]

R0 = TC100 < TC101

Program description
•

Remark

Average Maximum

Number of steps

d = s1 < s2

Usable I/O

< Relational expression

Constant

Item number

When TC100 < TC101, R0 is set to “1.” Otherwise, R0 is reset to “0.”
(TC n is the progress value of the no. n timer or counter.)

5-64

Other

Chapter 5 Instruction Specifications

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Command format

Steps

s is a double word

6

Bit
X

Substitution destination

R,
L,
M

Y
{

Word
TD, SS,
CU, CT



50

Condition

Remark

Average Maximum

Number of steps

d = s1 S< s2

d

Processing time (µs)

R7F4
d = s1 S< s2

Usable I/O

Signed < Relational expression

d = s1 S< s2

Name

Arithmetic instructions-20

Double word

WR,

DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

{

s1

Comparand

{

{

{

{

s2

Relational number

{

{

{

{

Function
z
z

Substitutes 1 when s1 is less than s2 and otherwise 0 into d, assuming s1 and s2 as signed binary data.
s1 and s2 are both signed binary data. When the most significant bit is 0, the value is positive; when the most significant
bit is 1, the value is negative.
s1, s2
– 2147483648 to +2147483647 (decimal)
H80000000 to H7FFFFFFF (hexadecimal)
b31

b16 b15

b0

Sign bit: 0 - Positive; 1 - Negative

Program example
[
R100 = DM000 S< DM002
]

R100 = DM000 S< DM002

Program description
z

When the value in DM000 is less than the value in DM002, 1 is set in R100. Otherwise, R100 is reset to 0.

5-65

Chapter 5 Instruction Specifications

Name

Arithmetic instructions-21

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

d = s1 <= s2
Instruction format

Remark

Average Maximum

Upper case: W

d = s1 <= s2

40



71



Lower case: DW

Number of steps
Condition

Steps

s is a word

4

s is a double word

6

d = s1 <= s2

Usable I/O

≤ Relational expression

X

Bit
R,

TD, SS,

Y

M

CU, CT

{

{

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

d

Substitution destination

s1

Comparand

{

{

{

{

{

{

{

{

s2

Relational number

{

{

{

{

{

{

{

{

Function
•

Substitutes “1” when s1 is less than or equal to s2 and otherwise “0” into d, assuming s1 and s2 as binary data.
Notes

•

The combinations of d, s1 and s2 are as follows:
d

s1

s2

Bit

Word

Word

Bit

Double word

Double word

Program example
[
Y00001 = WR10 <= WR100
]

Y00001 = WR10 <= WR100

Program description
•

When WR10 ≤ WR100, Y00001 is set to “1.” Otherwise, Y00001 is reset to “0.”

5-66

Other

Chapter 5 Instruction Specifications

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Command format

Steps

s is a double word

6

Bit
X

Substitution destination

R,
L,
M

Y
{

Word
TD, SS,
CU, CT



50

Condition

Remark

Average Maximum

Number of steps

d = s1 S<= s2

d

Processing time (µs)

R7F4
d = s1 S<= s2

Usable I/O

Signed ≤ Relational expression

d = s1 S<= s2

Name

Arithmetic instructions-22

Double word

WR,

DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

{

s1

Comparand

{

{

{

{

s2

Relational number

{

{

{

{

Function
z
z

Substitutes 1 when s1 is less than or equal to s2 and otherwise 0 into d, assuming s1 and s2 as signed binary data.
s1 and s2 are both signed binary data. When the most significant bit is 0, the value is positive; when the most significant
bit is 1, the value is negative.
s1, s2
– 2147483648 to +2147483647 (decimal)
H80000000 to H7FFFFFFF (hexadecimal)
b31

b16 b15

b0

Sign bit: 0 - Positive; 1 - Negative

Program example
[
Y00100 = DR10 S<= DR100
]

Y00100 = DR10 S<= DR100

Program description
z

When the value in DR10 is less than or equal the value in DR100, Y00100 is turned on. Otherwise, Y00100 is turned off.

5-67

Chapter 5 Instruction Specifications

Name

Application instructions-1

Ladder format

Bit set

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

BSET (d, n)
Instruction format

3

Usable I/O
BEST (d, n)

X

n

Bit location to be set

Upper case: W
26



35



Lower case: DW

Steps

BSET (d, n)

I/O to be set the bit

Remark

Average Maximum

Number of steps
Condition

d

Processing time (µs)

R7F4

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Constant

Item number

Other

{
{

The constant is set in
decimal.

Function
•
•

Sets the nth bit in the I/O (word or double word) specified by d to “1.”
Other bit contents are unaltered.
d
..................

n+1

n

n-1

........................

5

4

3

2

1

0

1

“1” is set.

If d is a word:
If d is a double word:

Designates the bit location depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n (WX,
WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the bit location depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n (WX,
WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

5-68

Chapter 5 Instruction Specifications

Name

Application instructions-2

Ladder format

Bit reset

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

BRES (d, n)

3

Usable I/O

X

Bit location to be reset

29



38



Lower case: DW

Steps

BRES (d, n)

n

Upper case: W

Number of steps
Condition

I/O to be set the bit

Remark

Average Maximum

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Other

{
{

The constant is set in
decimal.

Function
•
•

Sets the nth bit in the I/O (word or double word) specified by d to “0.”
Other bit contents are unaltered.
d
..................

n+1

n

n-1

........................

5

4

3

2

1

0

0

Reset to “0”.

If d is a word:
If d is a double word:

Designates the bit location depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n (WX,
WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the bit location depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n (WX,
WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

5-69

BRES (d, n)

Instruction format

d

Processing time (µs)

R7F4

Constant

Item number

Chapter 5 Instruction Specifications

Name

Application instructions-3

Ladder format

Bit test

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

↕

BTS (d, n)
Instruction format

Upper case: W

3

Usable I/O

X

BTS (d, n)

n

Bit location to be tested



38



Lower case: DW

Steps

BTS (d, n)

I/O to be tested

31

Number of steps
Condition

d

Remark

Average Maximum

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Constant

Item number

Other

{
{

The constant is set in
decimal.

Function
•
•

Checks the contents of the nth bit of the I/O (word or double word) specified by d, and if the result is “1,” '1' is set to C
(R7F0). If the result is “0,” C (R7F0) is reset to “0.”
The contents of d remains unaltered.
d

..................

n+1

n

n-1

........................

5

4

3

2

1

0

C (R7F0)

If d is a word:
If d is a double word:

Designates the bit location depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n (WX,
WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the bit location depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n (WX,
WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

Program example
X00000

DIF200
BSET
BRES
BTS
R000

LD
AND
[
BSET
BRES
BTS
R000
]

(DR0100, WR0001)
(DR0102, WR0001)
(DR0104, WR0001)
= R7F0

5-70

X00000
DIF200
(DR0100, WR0001)
(DR0102, WR0001)
(DR0104, WR0001)
= R7F0

Chapter 5 Instruction Specifications

Program description
When WR0001 = H1234 at the leading edge of X00000 (WR0001 = 0001001000110100)
20 (decimal)
If DR0100 = H00000000, DR0102 = HFFFFFFFF and DR0104 = H5555AAAA are set, the 20th bit of DR0100 is set to “1” by
the BSET at the leading edge of X00000.

b31
b20
b0
DR0100=00000000000000000000000000000000
This bit is set to “1.”

Also, the 20th bit of DR0102 is reset to “0” by BRES.

BTS (d, n)

b31
b20
b0
DR0102=11111111111111111111111111111111
This bit is set to “0.”

Also, the 20th bit of DR0104 is checked by BTS.

b31
b20
b0
DR0104=01010101010101011010101010101010
This bit is checked.
Since the 20th bit is “1,” C (R7F0) = “1” is set.

5-71

Chapter 5 Instruction Specifications

Name

Application instructions-4

Ladder format

Shift right

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

↕

SHR (d, n)
Instruction format

SHR (d, n)

I/O to be shifted

n

Number of bits to be
shifted

Upper case: W
38



46



Lower case: DW

Steps

SHR (d, n)

3

Usable I/O

Remark

Average Maximum

Number of steps
Condition

d

Processing time (µs)

R7F4

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Constant

Item number

Other

{
{

The constant is set in
decimal.

Function
•
•
•

Shifts the contents of d to the right (toward the lower digits) by n bits.
Sets n bits of SD (R7F2) contents starting with the most significant bit.
Sets the content of the nth bit from the least significant bit in C (R7F0).

Before execution
d
n bits
B

SD
SD (R7F2)

C (R7F0)

After execution
SD

B

SD SD

SD SD
n bits
Most significant bit (MSB)

If d is a word:
If d is a double word:

Least significant bit (LSB)

Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

Notes
•

If n is equal to “0,” the shifting is not performed. The previous state is retained in C.

5-72

Chapter 5 Instruction Specifications

Program example
X00000

R7F2
X00000 . . . . .

Defective unit input
To SD

X00001 . . . . .

Conveyor movement

X00001 DIF1
SHR (DR0000,1)
R7F0

Y00100
Defective unit output
Carry

Y00001 . . . . .

LD
OUT

X00000
R7F2

LD
X00001
AND DIF1
[
SHR
]

(DR0000,1)

LD
OUT

R7F0
Y00100

•
•
•

There exists a conveyor that has 16 stands and is moving to the right.
Each time the conveyor moves one stand to the right, a pulse input enters X1.
There is a sensor on the left end of the conveyor, and when a defective unit is placed on the conveyor, X00000 turns on.
X00000 (sensor input) and X00001 (conveyor movement) signals are as follows:

X00000
X00001

•

As the conveyor moves to the right, the data is also shifted one bit at a time, and when data exits to the carry (on the right
end of the conveyor), the (Y00100) solenoid valve turns on and rejects the defective unit.
Sensor (X00000)
b16

b0

X00001
X00000

Conveyor movement

b16
0

b0
1

0

0

1

0

0

0

0

1

(Y00100)
Solenoid valve

Y00000

0
C (R7F0)

SD (R7F2)
Shifts one bit at a time

5-73

SHR (d, n)

Program description

Chapter 5 Instruction Specifications

Name

Application instructions-5

Ladder format

Shift left

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

↕

SHL (d, n)
Instruction format

3

Usable I/O

X

SHL (d, n)

n

Number of bits to be
shifted

Upper case: W
38



46



Lower case: DW

Steps

SHL (d, n)

I/O to be shifted

Remark

Average Maximum

Number of steps
Condition

d

Processing time (µs)

R7F4

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Constant

Item number

Other

{
{

The constant is set in
decimal.

Function
•
•
•

Shifts the contents of d to the left (toward the upper digits) by n bits.
Sets n bits of SD (R7F2) contents starting with the least significant bit.
Sets the content of the nth bit from the most significant bit in C (R7F0).
d

Before execution

n bits
B

SD

C (R7F0)

SD (R7F2)

After execution
B

SD SD
Most significant bit (MSB)

If d is a word:
If d is a double word:

SD
SD SD
n bits
Least significant bit (LSB)

Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

Notes
•

If n is equal to “0,” the shifting is not performed. The previous state is retained in C.

Program example
R7F2

X00000
X00001

DIF1

R7F0

SHL

(DR0000 ,1 )
Y00100

LD
OUT
LD
AND
[
SHL
]
LD
OUT

X00000
R7F2
X00001
DIF1
(DR0000,1)
R7F0
Y00100

Program description
•
•
•

The R7F2 value is determined by the on/off of X00000.
The content of DR0000 is shifted to the left by one bit when X00001 rises.
At this time, the value of R7F2 is set in b0 and the value of b31 (b15 of WR1) in R7F0.
The Y00100 turns on/off depending on the b31 value of DR0000 (b15 of WR1) prior to the shift.

5-74

Chapter 5 Instruction Specifications

Name

Application instructions-6

Ladder format

Rotate right

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

↕

ROR (d, n)

3

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

•
•
•
•



75



Double word
DR,

WX WY WM TC DX DY DM

I/O to be rotated
Number of bits to be
rotated
Function

n

47

Lower case: DW

Steps

ROR (d, n)

d

Upper case: W

Number of steps
Condition

Usable I/O

Average Maximum

{

{

{

{

{

{

{

{

Other

{
{

The constant is set in
decimal.

Rotates the contents of d to the right (toward the lower digits) by n bits.
The content of the least significant bit is input to C (R7F0) while the content of C (R7F0) is input to the most significant bit.
This is repeated n times.
The content of C (R7F0) is set in the nth bit from the most significant bit.
The content of the nth bit from the least significant bit is set in C (R7F0).

Before execution

d

n bits
Bn

B3 B2 B1
C (R7F0)

After execution
Bn-1

Most significant bit (MSB)

If d is a word:
If d is a double word:

Bn

B3 B2 B1 C
n bits

Least significant bit (LSB)

Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

Notes
•

If n is equal to “0,” the rotation is not performed. The previous state is retained in C.

Program example
R000

DIF0

LD
R000
AND DIF0
[
R0R (WR0000,1)
]

R0R (WR0000 ,1 )

Program description
•

When R000 rises, WR0000 is shifted to the right by one bit.
At this time, the value of the least significant bit, b0, is set in R7F0, and the value of R7F0 immediately prior to the shift is
set in the most significant bit, b15.

5-75

ROR (d, n)

Instruction format

Remark

Processing time (µs)

R7F4

Constant

Item number

Chapter 5 Instruction Specifications

Name

Application instructions-7

Ladder format

Rotate left

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

↕

ROL (d, n)
Instruction format

Upper case: W

3

X

ROL (d, n)

I/O to be rotated

n

Number of bits to be
rotated



54



Lower case: DW

Steps

ROL (d, n)

d

46

Number of steps
Condition

Usable I/O

Remark

Average Maximum

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Constant

Item number

Other

{
{

The constant is set in
decimal.

Function
•
•
•

Rotates the contents of d to the left (toward the upper digits) by n bits.
The content of C (R7F0) is set in the nth bit from the least significant bit.
The content of the nth bit from the least significant bit is set in C (R7F0).

Before execution

d
n bits
B1

B2 B3

Bn

C (R7F0)

After execution
Bn

C

Bn-1

B1 B2 B3
n bits

Most significant bit (MSB)

If d is a word:
If d is a double word:

Least significant bit (LSB)

Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

Notes
•

If n is equal to “0,” the rotation is not performed. The previous state is retained in C.

5-76

Chapter 5 Instruction Specifications

Program example
X00001

DIF1

LD
AND
[
R7F0
ROL
ROL
]

R7F0= 0
ROL(DR0000,1)
ROL(DR0002,1)

X00001
DIF1
=0
(DR0000,1)
(DR0002,1)

Program description
When X00001 rises, the 64-bit data is shifted one bit at a time.
The space after the shift is filled with “0.”

Overall movement
C

b31

DR0002

b0

C

b31

DR0000

b0

C (R7F0)
0

0
DR0000 b31

5-77

ROL (d, n)

•

Chapter 5 Instruction Specifications

Name

Application instructions-8

Ladder format

Logical shift right

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

↕

LSR (d, n)
Instruction format

Average Maximum

Upper case: W

3

X

LSR (d, n)

I/O to be shifted

n

Number of bits to be
shifted



45



Lower case: DW

Steps

LSR (d, n)

d

36

Number of steps
Condition

Usable I/O

Remark

Processing time (µs)

R7F4

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Constant

Item number

Other

{
{

The constant is set in
decimal.

Function
•
•
•

Shifts the contents of d to the right (toward the lower digits) by n bits.
“0” is set from the most significant bit to the nth bit.
The content of the nth bit from the least significant bit is set in C (R7F0).
d

Before execution

n bits
B
C (R7F0)

After execution
0

0

0

0

B (R7F0)

0

n bits
Most significant bit (MSB)

If d is a word:
If d is a double word:

Least significant bit (LSB)

Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

Notes
•

If n is equal to “0,” the shifting is not performed. The previous state is retained in C.

Program example
X00001

DIF1

LSR

LD
X00001
AND DIF1
[
LSR (WR0000 ,1)
]

(WR0000 ,1 )

Program description
•

When X00001 rises, the content of WR0000 is shifted to the right by one bit.
At this time, “0” is set in b15 and the value of b0 immediately prior to the shift is set in R7F0.

5-78

Chapter 5 Instruction Specifications

Name

Application instructions-9

Ladder format

Logical shift left

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

↕

LSL (d, n)

n

Number of bits to be
shifted



45



3

X

I/O to be shifted

36

Lower case: DW

Steps

LSL (d, n)

d

Upper case: W

Number of steps
Condition

Usable I/O

Average Maximum

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Other

{
{

The constant is set in
decimal.

Function
•
•
•

Shifts the contents of d to the left (toward the upper digits) by n bits.
“0” is set from the least significant bit to the nth bit.
The content of the nth bit from the most significant bit is set in C (R7F0).

Before execution

d

n bits
B

C (R7F0)

After execution
0

B

0

0

0

0

n bits
Most significant bit (MSB)

If d is a word:
If d is a double word:

Least significant bit (LSB)

Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).

Notes
•

If n is equal to “0,” the shifting is not performed. The previous state is retained in C.

Program example
X00001

DIF1

LSL

LD
X00001
AND DIF1
[
LSL (WR0000 ,1)
]

(WR0000 ,1 )

Program description
•

When X00001 rises, the content of WR0000 is shifted to the left by one bit.
At this time, “0” is set in b0 and the value of b15 immediately prior to the shift is set in R7F0.

5-79

LSL (d, n)

Instruction format

Remark

Processing time (µs)

R7F4

Constant

Item number

Chapter 5 Instruction Specifications

Name

Application instructions-10

Ladder format

BCD shift right

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

BSR (d, n)
Instruction format

Average Maximum

Upper case: W

3

Usable I/O

X

BSR (d, n)

n

Number of digits to be
shifted



40



Lower case: DW

Steps

BSR (d, n)

I/O to be shifted

32

Number of steps
Condition

d

Remark

Processing time (µs)

R7F4

Bit
R,

TD, SS,

M

CU, CT

Y

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Constant

Item number

Other

{
{

The constant is set in
decimal.

Function
•
•
•

Shifts the contents of d to the right (toward the lower digits) by n digits (1 digit is equivalent to 4 bits).
“0” is set from the most significant bit to the nth digit.
The digits from least significant bit to the nth digit are discarded.

Before execution

n digits

After execution

Discarded

0

0000

0000
n digits
Least significant bit (LSB)

Most significant bit (MSB)

If d is a word:
If d is a double word:

Designates the shift amount, depending on the contents (0 to 3) of the lower 2 bits (b1, b0) of n (WX,
WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 3 (decimal).
Designates the shift amount, depending on the contents (0 to 7) of the lower 3 bits (b2 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 7 (decimal).

Notes
•

If n is equal to “0,” the shifting is not performed.

Program example
X00001

DIF1

BSR

LD
X00001
AND DIF1
[
BSR (WR0000 ,1)
]

(WR0000 ,1 )

Program description
•

When X00001 rises, the content of WR0000 is regarded as BCD code and shifted to the right by four bits.
At this time, the values in the lower 4 bits (b3 to b0) are deleted and “0000” is set in the upper four bits (b12 to b15).
Before the shift

H

After the shift

1

2

3

4

0001

0010

0011

0100

H
Deleted

0

1

0000
0001
Set to “0”

5-80

2

3

0010

0011

Chapter 5 Instruction Specifications

Name

Application instructions-11

Ladder format

BCD shift left

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

BSL (d, n)

3

Usable I/O

X

n

Number of digits to be
shifted

32



39



Lower case: DW

Steps

BSL (d, n)

I/O to be shifted

Upper case: W

Number of steps
Condition

d

Average Maximum

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

Other

{
{

The constant is set in
decimal.

Function
•
•
•

Shifts the contents of d to the left (toward the upper digits) by n digits (one digit is equivalent to 4 bits).
“0” is set from the least significant bit to the nth digit.
The digits from the most significant bit to the nth digit are discarded.
d

Before execution

n digits

Discarded

After execution

0000

0000

Most significant bit (MSB)

If d is a word:
If d is a double word:

0

n digits
Least significant bit (LSB)

Designates the shift amount, depending on the contents (0 to 3) of the lower 2 bits (b1, b0) of n (WX,
WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 3 (decimal).
Designates the shift amount, depending on the contents (0 to 7) of the lower 3 bits (b2 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 7 (decimal).

Notes
•

If n is equal to “0,” the shifting is not performed.

Program example
X00001

DIF1

BSL

LD
X00001
AND DIF1
[
BSL (WR0000 ,1)
]

(WR0000 ,1 )

Program description
•

When X00001 rises, the content of WR0000 is regarded as BCD code and shifted to the left by four bits.
At this time, the data of the lower four bits are deleted and “0000” is set in the upper four bits.
Before the shift
H

Deleted

1

2

0001

0010

3

After the shift
4

0011 0100

H

2

3

4

0010

0011

0100

5-81

0
0000
Set to “0”

BSL (d, n)

Instruction format

Remark

Processing time (µs)

R7F4

Constant

Item number

Chapter 5 Instruction Specifications

Name

Application instructions-12

Ladder format

Block transfer (MOVE)

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

MOV (d, s, n)
Instruction format

Number of steps
Condition

As per the table
below.

Steps

MOV (d, s, n)

Remark

Average Maximum

4

Usable I/O
MOV (d, s, n)

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

d

Transfer destination head I/O

{

{

s

Transfer source head I/O

{

{

n

Number of bits (words)
to be transferred

{

{

{

{

Constant

Item number

{

Other

The constant is set in
decimal.

Function
•
•

Transfers n bits (words) between s and s + n − 1 to d + n − 1.
The values between s and s + n − 1 are retained. However, if the transfer source and transfer destination ranges overlap, the
transferred values will be used.

Before execution

n bits (words)
s+n-1

s

After execution

d

d+n-1

If n is a word:
If n is a constant:

The contents (0 to 255) of the lower 8 bits (b7 to b0) of n (WX, WY, WR, WM, TC) are set to the
number of bits (words) to be transferred.
0 to 255 (decimal) can be designated for the number of bits (words) to be transferred.

Notes
•
•

Use this instruction so that d + n − 1 and s + n − 1 do not exceed the I/O range (R7BF, M3FFF, WRFFF, and WM3FF). If
the I/O range is exceeded, DER is equal to '1' and the transfer is performed to the maximum range.
If n is equal to “0,” the block transfer is not performed and DER (R7F4) will be set to “0.”
n
1
16
32
64
128
255

Processing time (µs) (Average)
Bit
Word
153
124
165
154
166
197
175
282
199
430
226
780

5-82

Chapter 5 Instruction Specifications

Program example
• The data in WM000 to WM01F is transferred to the area WR020 to WR03F.
R001

DIF0

MOV (WR020,WM000,32)
Y00100

R7F4

SET

LD
R001
AND DIF0
[
MOV (WR020,WM000,32)
]
R7F4
Y00100

MOV (d, s, n)

LD
SET

Program description
• 32 words of data are transferred.

Transfer source area

Transfer destination area

WM000

WR010

WM020

WR01F

WM03F

5-83

Chapter 5 Instruction Specifications

Name

Application instructions-13

Ladder format

Copy

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

COPY (d, s, n)
Instruction format

Number of steps
Condition

As per the table
below.

Steps

COPY (d, s, n)

Remark

Average Maximum

4

COPY (d, s, n)

Usable I/O

X

d

Copy destination head I/O

s

Copy source head I/O

n

Number of bits (words)
to be copied

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

WX WY WM TC DX DY DM

{
{

{

Double word
DR,

Constant

Item number

Other

{

{

{

{

{

{

{

{

{

{

{

{

The constant is set in
decimal.

Function
•
•
•

The value of s (bit, word) is copied from d to d + n - 1.
The value of s is retained.
A bit is copied to bits and a word is copied to words.
s

s

s

s

s

s

s

s

s

s

s
d

d+n-1
n bits (words)

If n is a word:
If n is a constant:

The contents (0 to 255) of the lower 8 bits (b7 to b0) of n (WX, WY, WR, WM, TC) are set to the
number of bits (words) to be copied.
0 to 255 (decimal) can be designated for the number of bits (words) to be copied.

Notes
•
•

Use this instruction so that d + n - 1 does not exceed the I/O range (R7BF, M3FFF, WRFFF, and WM3FF). If it exceeds the
I/O range, DER is equal to '1' and transfers to the maximum range.
If n is equal to “0,” the block copy is not be performed and DER (R7F4) will be set to “0.”
n
1
16
32
64
128
255

Processing time (µs) (Average)
Bit
Word
80
73
83
114
83
148
88
224
95
381
109
785

5-84

Chapter 5 Instruction Specifications

Program example
The default value (H2020) is set in the range of WR0100 to WR01FE.
R7E3

LD R7E3
[

COPY (WR0100, H2020,255)

COPY (WR0100, H2020, 255)
]

Program description

WR0100

Not fixed

WR0100

Not fixed

•

•

•

•

•

•

H20

H20

H20

H20

•

•

•

•

•

•

•

•

•

•

H20

H20

H20

H20

After RUN

WR01FE

Not fixed

Not fixed

WR01FE

5-85

255 words
(510 bytes)

COPY (d, s, n)

WR0100 to WR01FE is considered as the communication data area and is filled with space code (H20) as the default value
during the first scan after RUN starts.
R7E3: The first scan ON after RUN

Chapter 5 Instruction Specifications

Name

Application instructions-14

Ladder format

Block exchange (EXCHANGE)

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

XCG (d1, d2, n)
Instruction format

Number of steps
Condition

4

XCG (d1, d2, n)

Usable I/O

X

Exchange destination
head I/O
Exchange source head I/O

d1
d2

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

Number of bits (words)
to be exchanged

n

Average Maximum

As per the table
below.

Steps

XCG (d1, d2, n)

Remark

Processing time (µs)

R7F4

{

{

{

{

Constant

Item number

{

Other

The constant is set in
decimal.

Function
•
•

Exchanges the contents of the n bits from d1 to d1 + n - 1 and the contents between d2 and d2 + n - 1.
Bits are exchanged with bits and words are exchanged with words.
d1+n-1

d2+n-1

If n is a word:
If n is a constant:

n bits (words)
d1

d2

The contents (0 to 255) of the lower 8 bits (b7 to b0) of n (WX, WY, WR, WM, TC) are set to the
number of bits (words) to be exchanged.
0 to 255 (decimal) can be designated for the number of bits (words) to be exchanged.

Notes
•
•

Use this instruction so that d1 + n − 1 and d2 + n - 1 do not exceed the I/O range (R7BF, M3FFF, WRFFF, and WM3FF). If they
exceeds the I/O range, DER is equal to '1' and the exchange is performed up to the maximum range with respect to the smaller number of
bits (words) specified in d1 and d2.
If n is equal to “0,” the block exchange is not performed and DER (R7F4) will be set to “0.”

Program example
X00001

DIF1

LD
X00001
AND DIF1
[
XCG (WM000, WM100, 256)
]

XCG (WM000, WM100, 256)

Program description
•

When X00001 rises, the contents of WM000 to WM0FF are exchanged with the contents of WM100 to WM1FF.
Processing time (µs) (Average)
n
Bit
Word
1
139
120
16
338
159
32
528
207
64
918
284
128
1899
449
255
3695
779

5-86

Chapter 5 Instruction Specifications

Name

Ladder format

NOT

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

NOT (d)
Instruction format

Number of steps
Condition

Steps

NOT (d)

2

Usable I/O
d

X

I/O to be reversed

Bit
R,

TD, SS,

Y

M

CU, CT

{

{

Word
WR,

27



22



28



Double word
DR,

WX WY WM TC DX DY DM
{

{

{

Function
•

Reverses the contents of d.

Before execution
1

1

1

1

0

0

0

0

1

1

1

1

0

0

0

0

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

After execution

Notes
•

Use edge trigger as the startup condition for this instruction.

Program example

R000

DIF0

NOT (WR0000)

LD
R000
AND DIF0
[
NOT WR0000
]

Program description
•

When R000 rises, the content of WR0000 is reversed.
Example) If WR0000 is H1234, WR0000 = HEDCB after the instruction is executed;
WR0000 = H1234 when executed again

5-87

Remark

Average Maximum

{

Upper case: B
Middle case: W
Lower case: DW

Other
NOT (d)

Application instructions-15

Constant

Item number

Chapter 5 Instruction Specifications

Name

Application instructions-16

Ladder format

Two's complement (NEGATE)

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

NEG (d)
Instruction format

Upper case: W
22



29



Lower case: DW

Number of steps
Condition

Steps

NEG (d)

2

Usable I/O
NEG (d)

d

Remark

Average Maximum

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM
{

I/O to take complement

{

{

Constant

Item number

Other

{

Function
•

Calculates two's complements of d (Reverses each bit contained in d and adds “1.” However, C (R7F0) remains
unchanged).

Before execution

1

1

0

0

1

1

0

0

0

0

0

1

1

0

1

0

0

0

1

1

0

0

1

1

1

1

1

0

0

1

0

1
1

+
After execution

0

0

1

1

0

0

1

1

1

1

1

0

0

1

1

0

Notes
•

Use edge trigger as the startup condition for this instruction.

Program example

R000

DIF0

NEG (WR0000)

LD
R000
AND DIF0
[
NEG WR0000
]

Program description
•

When R000 rises, 2's complement of the content of WR0000 is obtained.
Example) If WR0000 is H1234, WR0000 = HEDCC after the instruction is executed;
WR0000 = H1234 when executed again

5-88

Chapter 5 Instruction Specifications

Name

Application instructions-17

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

↕

Upper case: W
30



4



Lower case: DW

Number of steps
Condition

Steps

Word

3

Double word

4

ABS (d, s)

X

Y

Bit
R,

TD, SS,

M

CU, CT

I/O after absolute value is
taken
I/O before absolute value
is taken

s

Remark

Average Maximum

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

{

{

{

Other

{

Function
•
•
•
•

Given s is signed, set the absolute value of s in d.
If s is positive or 0: The content of s is set to d. C (R7F0) is set to “0.”
If s is negative: Two's complements of the contents of s are set in d. C (R7F0) is set to “1.”
Perform with d and s as both words or both double words.

Example:

R000

DIF0

ABS (WR0000, WM0000)

(When the value of WM is positive or 0)
WM0000 = H4C1A

d

(When the value of WM is negative)
WM0000 = HCC1A

s

R7F0
WM0000 0 1 0 0 1 1 0 0 0 0 0 1 1 0 1 0
0
s

d

s+1

WM0000 1 1 0 0 1 1 0 0 0 0 0 1 1 0 1 0
s

R7F0
0

0011001111100101
1

+
WR0000 0 1 0 0 1 1 0 0 0 0 0 1 1 0 1 0
d

•

When s is a word:

•

When s is a double word:

0

WR0000 0 0 1 1 0 0 1 1 1 1 1 0 0 1 1 0
d

0 to 32767 (decimal) correspond to H000 to H7FFF (hexadecimal).
−32768 to −1(decimal) correspond to H8000 to HFFFF (hexadecimal).
0 to 2147483647 (decimal) correspond to H00000000 to H7FFFFFFF (hexadecimal).
−2147483648 to −1 (decimal) correspond to H80000000 to HFFFFFFFF (hexadecimal).

Notes
•

1

Use edge trigger as the startup condition for this instruction.

5-89

ABS (d, s)

Instruction format

Usable I/O

Processing time (µs)

R7F4
ABS (d, s)

d

Absolute value

Constant

Item number

Chapter 5 Instruction Specifications

Binary → BCD conversion

Name

Application instructions-18

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

BCD (d, s)
Instruction format

Remark

Processing time (µs)

R7F4

Average Maximum

Upper case: W
79



89



Lower case: DW

Number of steps
Condition

Steps

Word

3

Double word

4

BCD (d, s)

Usable I/O
BCD (d, s)

X

d

I/O after conversion (BCD)

s

I/O before conversion
(BIN)

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

{

{

{

Constant

Item number

Other

{

Function
•
•

The result of the content conversion of s from binary to BCD is output to d.
If the conversion result of s exceeds the number of BCD data digits in d, DER (R7F4) is set to '1' and the instruction will not
be executed.
If s is a word:
set s so that H0000 ≤ s ≤ H270F (0 to 9999).
If s is a double word:
set s so that H00000000 ≤ s ≤ H5F5E0FF (0 to 99999999).

Before execution s

1
0

0

B
0

1

1

0

4
1

1

0

1

F
0

0

1

1

1

1

(Binary)
1B4FH=6991

After execution d

6
0

1

9
1

0

1

0

9
0

1

1

0

1
0

1

0

0

0

1

(BCD)

Combinations of d and s.
d

s

Word

Word

Double word

Double word

Notes
•

If a data error occurred, the previous contents of d are retained.

Program example
X00000

BCD (WM0010, WR000

LD
[
BCD
]

)

X00000
(WM0010, WR000)

Program description
•

When X00000 turns on, the content of WR000 is converted from binary to BCD and output to WM0010.
WR000
H1B4F
After conversion
WM0010
H6691

5-90

Chapter 5 Instruction Specifications

BCD → Binary conversion

Name

Application instructions-19

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

BIN (d, s)

Usable I/O

X

I/O after conversion (BIN)

s

I/O before conversion
(BCD)

Upper case: W
49



75



Lower case: DW

Number of steps
Condition

Steps

Word

3

Double word

4

BIN (d, s)

d

Average Maximum

Bit
R,

TD, SS,

M

CU, CT

Y

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

{

{

{

{

{

{

{

{

{

{

{

Other

{

Function
•
•

The result of the content conversion of s from BCD to binary is output to d.
If the contents of s are not BCD data (if A through F is included in the data), DER (R7F4) is set to '1' and the conversion
will not be executed (d remains unchanged).

Before execution s

6
0

1

After execution d

9
1

0

1

0

1
0

0

9
0

1

1

0

B
0

1

1

0

1
0

1

0

0

4
1

1

0

1

0

1

1

1

(BCD)

F
0

0

1

1

(Binary)

Combinations of d and s.
d

s

Word

Word

Double word

Double word

Notes
•

If a data error occurred, the previous contents of d are retained.

Program example
X00000

BIN (WM0010, WR000

LD X00000
[
BIN (WM0010, WR000)
]

)

Program description
•

When X00000 turns on, the content of WR000 is converted from BCD to binary and output.
WR000
H6691
After conversion
WM0010
H1B4F

5-91

BIN (d, s)

Instruction format

Remark

Processing time (µs)

R7F4

Constant

Item number

Chapter 5 Instruction Specifications

Name

Application instructions-20

Ladder format

Decode

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

DECO (d, s, n)
Instruction format

Number of steps
Condition

As per the table
below.

Steps

DECO (d, s, n)

Remark

Average Maximum

4

DECO (d, s, n)

Usable I/O

X

d

Decode destination head I/O

s

Word I/O to be decoded

n

Number of bits to be
decoded

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

{
{

{

{

{

{
{

1 to 8 (decimal)

Function
•
•

Decodes the lower n bits of s to 2n and outputs '1' to the decoded bits in the bit rows between d and d + 2n – 1 (where n = 1
to 8). Note that the value “0” is output for bits other than the decoded bits in the bit row d + 2n – 1.
If n is “0,” the instruction will not be executed, and the contents of d to d + 2n – 1 remain unchanged.
b15

b7

s

b0
0BH

d+2 n-1

d+B

0

1

d
0

0

n

n bits (n = 1 to 8)

2

Notes
•
•

Use this instruction so that d + 2n– 1 does not exceed the I/O range (R7BF and M3FFF). If it exceeds the I/O range, DER is
equal to '1' and the decoding is performed at the maximum range starting from d.
Use 1 to 8 for n.

Program example

R100

DIF1
DECO (R000, WX0000, 4)

LD
R100
AND DIF1
[
DECO (R000, WX0000, 4)
]

Program description
•

When WX0000 = H000F, R00F, which is the 15th bit from R000 among the bits indicated by the lower four bit values of
WX0000, is set to “1” upon leading of R100.
n
1
2
3
4
5
6
7
8

Processing time (µs)
Average
Maximum
105
–
115
–
195
–
195
–
317
–
481
–
829
–
1586
–

5-92

Chapter 5 Instruction Specifications

Name

Application instructions-21

Ladder format

Encode

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

↕

ENCO (d, s, n)
Instruction format

Number of steps
Condition

As per the table
below.

Steps
4

Usable I/O

X

d

Decode destination head I/O

s

Word I/O to be encoded

n

Number of bits to be
encoded

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM
{

Other

{

{
{

1 to 8 (decimal)

Function
•
•
•
•

Encodes the bit location 2n in the range between s and s + 2n – 1 where the bit is “1,” and outputs the result to d (n = 1 to 8).
Upper bits (16-n) of d are set to “0.”
If n is “0,” the instruction will not be executed and the contents of d retain the original values.
If there are more than one bits that are set to “1” between s and s + 2n – 1, the upper bit location will be encoded.
If all the bits from s to s + 2n – 1 are '0', '0' is output to d, and C (R7F0) is equal to '1.' In other cases, C (R7F0) is set to '0.'
n

s+2 -1

s+B

0

1

s
0

0

b15

b7

b0
0BH

d

n

n bits (1 to 8)

2

Notes
•
•

Use this instruction so that s + 2n− 1 does not exceed the I/O range (R7BF and M3FFF). If it exceeds the I/O range, DER is
set to '1' and the encoding is performed at the maximum range starting from s.
Use 1 to 8 for n.

Program example
X00001 DIF1
ENCO (WR0000, R000, 4)

LD
X00001
AND DIF1
[
ENCO (WR0000, R000, 4)
]

Program description
•

Upon the leading of X00001, the most significant bit that is set to “1” is detected within the row of bits R000 to R00F (24 –1
= 15 bits), and a four-bit binary number is set in the word I/O of d.
Example) If “1” is set in the 7th and 6th bits of R000 to R00F, H0007 is set in WR0000.
n
1
2
3
4
5
6
7
8

Processing time (µs)
Average
Maximum
128
–
128
–
128
–
187
–
126
–
126
–
126
–
126
–

5-93

ENCO (d, s, n)

ENCO (d, s, n)

Remark

Average Maximum

Constant

Item number

Chapter 5 Instruction Specifications

Item number

Name

Application instructions-22

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

Instruction format

X

BCU (d, s)

s

Upper case: W
33



42



Lower case: DW

Condition

Steps

Word

3

Double word

4

Y

Bit
R,

TD, SS,

Word
WR,

Double word
DR,

M

CU, CT

WX WY WM

TC DX DY DM

Constant

Usable I/O
Number of bits set to 1

Remark

Average Maximum

Number of steps

BCU (d, s)

I/O that counts the bits
set to 1

Processing time (µs)

R7F4
BCU (d, s)

d

Bit count

{

{

{

{

{

{

{

{

{

{

Other

Function
•

Of the contents of s (16 bits for word and 32 bits for double word), the number of bits that are set to “1” are output to d (0 to
32).
15

15(32)

0

5

d

s
0 to 32

• • •

1

0
• • •

1 1

• • •

1

• • •

1

• • • • •

1

1 1

• • •

1

Number of bits that are set to "1"

Program example

X00002 DIF2

BCU (WR0000, DR0020)

LD
X00002
AND DIF2
[
BCU (WR0000, DR0020)
]

Program description
•

At the leading edge of X00002, the number of bits that are set to “1” among the data input to DR0020 is counted, and set to
WR0000.
Example)

In the case of
A
7
1
4
F
1
5
3
DR0020 = 1 0 1 0 0 1 1 1 0 0 0 1 0 1 0 0 1 1 1 1 0 0 0 1 0 1 0 1 0 0 1 1
the number of bits set to "1" is 16 (decimal).
Therefore, the result is WR0000 = H0010.

5-94

Chapter 5 Instruction Specifications

Name

Application instructions-23

Ladder format

Swap

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

SWAP (d)
Instruction format

Number of steps
Condition

Remark

Average Maximum

25



Steps

SWAP (d)

2

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM
{

I/O to be exchanged

Other
SWAP (d)

Usable I/O
d

Processing time (µs)

R7F4

Constant

Item number

{

Function
•

Swaps the upper 8 bits and lower 8 bits contained in d.

(Before execution) d

0 0 0 1 1 1 0 1 0 1 1 0 1 1 0 1

(After execution) d

0 1 1 0 1 1 0 1 0 0 0 1 1 1 0 1

Notes
•

Use edge trigger as the startup condition for this instruction.

Program example
X00000

DIF0

LD
X00000
AND DIF0
[
SWAP (WR0010)
]

SWAP (WR0010 )

Program description
•

The upper and lower bits of WR0010 are swapped at the leading edge of X00000, and are stored in WR0010.
WR0010 H1234
Before execution
WR0010 H3412
After execution
Note: Since a scan is executed when there is no leading edge DIF0, the upper and lower bits of WR0010 are swapped every
time a scan is executed.

5-95

Chapter 5 Instruction Specifications

Name

Application instructions-24

Ladder format

Unit

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

UNIT (d, s, n)
Instruction format

Number of steps
Condition

Steps

UNIT (d, s, n)

UNIT (d, s, n)

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

As per the table
below.

Double word
DR,

WX WY WM TC DX DY DM

Unity result write
destination I/O
Unity destination head I/O

s

{

Other

{
{

Numbers of words to be
united

n

Remark

Average Maximum

4

Usable I/O
d

Processing time (µs)

R7F4

Constant

Item number

{

n=0 to 4

Function
•
•
•
•

Sets the values in the lower four bits of each of the n (1 to 4) words starting from s to the lower four bits of each word in d.
If n is 1 to 3, the bits not set in d will be “0.”
The data stored in s to s + n – 1 will be retained even if UNIT is executed.
Use this instruction so that s + n - 1 does not exceed the I/O range (WRFFF and WM3FF). If it exceeds the I/O range, DER
is equal to '1' and the lower four bits within the range between s and I/O will be set in d.
Upper digits

When n=4

4 bits

s

B1

s+1

B2

s+2

B3

s+3

d

B4

Lower digits
B3

B4
Ignored

Notes
•
•

When n=0, it is not executed.
When n>5, it is not executed.
n
0
1
2
3
4

Processing time (µs)
Average
Maximum
75
–
100
–
103
–
106
–
109
–

5-96

B2

B1

When n is 1 : B2 to B4 of d are 0
When n is 2 : B3 to B4 of d are 0
When n is 3 : B4 of d is 0

Chapter 5 Instruction Specifications

Program example
X00001

DIF0

UNIT (WY0010, WR0000, 3)

LD
X00001
AND DIF0
[
UNIT (WY0010, WR0000, 3)
]

Program description

3-digit BCD input display device

Input
Line No.

28-point type

Conveyor No. Product No.

Output
3
Y111 to Y108

2
Y107 to Y104

WR0002

(Line No.)

Data “3”

WR0001

(Conveyor No.)

Data “2”

WR0000

(Product No.)

Data “7”

5-97

7
Y103 to Y100

UNIT (d, s, n)

A 3-digit BCD input display device is connected to the WY0010, and each digit displays WR0000 to WR0002 data
independently. (Only the lower four bits are considered the valid data for WR0000 to WR0002.)

Chapter 5 Instruction Specifications

Name

Application instructions-25

Ladder format

Distribute

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

DIST (d, s, n)
Instruction format

4

Usable I/O
DIST (d, s, n)

X

Y

Bit
R,

TD, SS,

M

CU, CT

Distribution result write
destination head I/O
I/O to be distributed

s

As per the table
below.

Steps

DIST (d, s, n)

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Other

{
{

{

{

{

{

Number of words to be
distributed

n

Remark

Average Maximum

Number of steps
Condition

d

Processing time (µs)

R7F4

Constant

Item number

{

n=0 to 4

Function
•
•
•
•

Distributes s into four bit sections and sets to the lower four bits of the n words starting from d.
The upper 12 bits of the range d to d + n – 1 will be “0.”
The value of s will be retained even if DIST is executed.
Use this instruction so that d + n - 1 does not exceed the I/O range (WRFFF and WM3FF). If it exceeds the I/O range, DER
is equal to '1' and the distribution data for s will be set in the lower four bits within the range between d and the I/O.
Upper digits

When n = 4:
4 bits
d

0

0

B1

d+1

0

0

B2

d+2

0

0

B3

d+3

0

0

B4

s

B4

Lower digits
B3

Notes
•

When n=0, it is not executed.

n
0
1
2
3
4

Processing time (µs)
Average
Maximum
62
–
87
–
90
–
92
–
94
–

5-98

B2

B1

Chapter 5 Instruction Specifications

Program example
X01001

DIF0
DIST (WR0000, WX0000, 4)

LD
X00001
AND DIF0
[
DIST (WR0000, WX0000, 4)
]

Program description

Input
28-point type
Output

9

7

4

6

X015 to X012 X011 to X008 X007 to X004 X003 to X000
WR0003
=H0009
WR0002
=H0007
WR0001
=H0004
WR0000
=H0006

5-99

DIST (d, s, n)

A 4-bit 4-digit Digit switch is connected to the WX0000, and the data for each digit is stored in WR0000 to WR0003 as
independent data.

Chapter 5 Instruction Specifications

Name

Control instructions-1

Ladder format

Normal scan end

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

END
Instruction format

Number of steps
Condition

Remark

Average Maximum

714



Steps

END

1

Usable I/O

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

Function
•

END

•
•
•

Indicates the end of a normal scan program. (The execution of this instruction returns to the beginning of the program, and
a normal scan is executed.)
This instruction is not required when there are no subroutine programs or interrupt scan programs.
If there is a subroutine program or interrupting program, write this instruction at the end of the normal scan program.
This instruction is used only once in a program. Do not use any startup conditions with this instruction.
Notes

•

The END instruction is checked prior to the execution, and if there is an error, the following error codes are set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code
34

Special internal output

Error code

WRF001

H0010

There is no END instruction.

H0022

There are two or more END instructions.

H0032

A startup condition is used with the END
instruction.

Instruction for use

Normal scan program
END instruction

END
SB n

Subroutine program

INT n

Interrupt program

Error description

5-100

Chapter 5 Instruction Specifications

Name

Control instructions-2

Ladder format

Scan conditional end

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

CEND (s)
Instruction format

s

Scan end condition

Upper case :
5



Conditions
do not meet

Steps

CEND (s)

2
Bit
R,

TD, SS,
CU, CT

X

Y

M

{

{

{

Remark

Average Maximum

Number of steps
Condition

Usable I/O

Processing time (µs)

R7F4

Word
WR,
WX WY WM TC

Lower case :
707



Double word
DR,
DX DY DM

Conditions meet

Constant

Item number

Other

•
•
•
•

If the scan end condition (s) is on, the execution of this instruction returns to the head of the scan program and executes the
program.
If (s) is off, the next instruction is executed.
This instruction can only be used in normal scan programs, and can be used as many times as desired.
This instruction can specify a startup condition. In this case, if the startup condition and (s) are both on, this instruction is
executed.
Notes

•

The CEND instruction is checked prior to the execution, and if there is an error, the following error codes are set in the
special internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code

Special internal output

Error code

34

WRF001

H0023

Instruction for use

Program head
Normal scan program

When R000 is on, to
program head

CEND (R000)

Normal scan program
CEND (R001)

When R000 is off, the next
instruction is executed.
When R001 is on, to
program
When R001 is off, the next
instruction is executed.

Normal scan program
END

5-101

Error description
The CEND instruction is found after the END
instruction.

CEND (s)

Function

Chapter 5 Instruction Specifications

Name

Control instructions-3

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

1]

z

z

z

Instruction format

Number of steps
Condition

Remark

Average Maximum

32



Steps

JMP n

n

Processing time (µs)

R7F4
JMP n

Usable I/O

Unconditional jump (JUMP)

2

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

Code number

Other
0 to 255 (Decimal)

Function
•
JMP n

•
•
•
•

If the startup condition of JMP n switches on, the control jumps the program from this instruction to the LBL n of the same
code number. Always use JMP n and LBL n in pairs.
If the startup condition is not established, the next instruction will be executed.
To set this instruction in conjunction with other instructions in the same arithmetic-operation box, insert this instruction at
the end of the box.
The JMP n instruction is valid only within the same scan program. (A jump to a subroutine or interrupt scan cannot be
performed from a normal scan, nor vice versa.)
Nesting of JMP n instructions is possible, but note so that an overload error does not occur.
Notes

•

This instruction is checked prior to the execution, and if there is an error, the following error codes are set in the special
internal outputs R7F3 and WRF015. In this case, jump is not performed and the next instruction will be executed.
Special internal output
R7F3=1

WRF015

Error code

Error description

H0015

There is no LBL n.

H0040

A jump is attempted to a different program area.

Instruction for use

JMP n
Program

• When the startup condition turns on, it jumps to LBL n.
• If there is a timer within the program it jumped to, the progress value is updated,
but since instructions are not executed, output will not be turned on even if the
ON conditions are met.

LBL n
Program

5-102

Chapter 5 Instruction Specifications

Name

Control instructions-4

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

1]

z

z

z

Instruction format

s

Jump condition

3



Conditions
do not meet

3

Usable I/O

Upper case :

Steps

CJMP n (s)

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Lower case :
32



Double word
DR,

WX WY WM TC DX DY DM

Conditions meet

{
{

{

Remark

Average Maximum

Number of steps
Condition

Code number

Processing time (µs)

R7F4
CJMP n (s)

n

Conditional jump

Constant

Item number

Other
0 to 255 (Decimal)

{

•
•
•
•
•

If the jump condition (s) of CJMP n(s) switches on, the control jumps the program from this instruction to the LBL n of the
same code number. Always use CJMP n(s) and LBL n in pairs.
If the startup or jump condition is not established, the next instruction will be executed.
To set this instruction in conjunction with other instructions in the same arithmetic-operation box, caution must be used
because the jump takes place without performing the operations specified after the instruction.
The CJMP n(s) instruction is valid only within the same scan program. (A jump to a subroutine or interrupt scan cannot be
performed from a normal scan, nor vice versa.)
Nesting of CJMP n(s) instructions is possible, but note so that an overload error does not occur.
Notes

•

This instruction is checked prior to the execution, and if there is an error, the following error codes are set in the special
internal outputs R7F3 and WRF015. In this case, jump is not performed and the next instruction will be executed.
Special internal output
R7F3=1

WRF015

Error code

Error description

H0015

There is no LBL n.

H0040

A jump is attempted to a different program area.

Instruction for use
R101

CJMP n (R000)

Program

• When the startup condition and the R000 jump condition bit I/O are both on, it
jumps to LBL n.
• If there is a timer within the program it jumped to, the progress value is updated,
but since instructions are not executed, output will not be turned on even if the
ON conditions are met.

LBL n

Program
?????

5-103

CJMP n (s)

Function

Chapter 5 Instruction Specifications

Syntax of JMP, CJMP
6] An overlap of JMP instructions with the same code
number is valid.

1] LBL n with the same code number as the code
number n of the JMP instruction is required.

JMP 5
JMP 5
CJMP 5

• If JMP 1 is executed when there
is no LBL 1, an LBL undefined
error occurs. JMP 1 will do
nothing and execute the next
processing of program A.

JMP 1
Program A

LBL 2
Program B

LBL 5

2] Jump is not permitted to outside the area in which the JMP
instruction resides.
Program head
Normal scan area

JMP 1
LBL 7
JMP 2
LBL 3
END

Subroutine area

CJMP n (s)

Subroutine area

Interrupt scan area

SB
JMP 3
LBL 2
JMP 4
RTS
SB
LBL 4
JMP 5
LBL 6
PTS

7] A startup condition can be programmed with respect to
JMP instructions.
Startup condition

• When the JMP 1 instruction
is executed, since LBL 1 is
not in the normal scan area,
a "jump outside the area"
error will be generated. The
JMP 1 instruction will do
nothing and execute the next
processing of program.

X00000 X00001
X00002

JMP 0
Program A

Program B

• JMP 2 to JMP 7 perform
similar processing.

X00003

Program C

LBL 0

INTO
JMP 6
LBL 5
JMP 7

8] The CJMP instruction also follows the same syntax as 1]
through 7].

LBL 1
RTI

3] Code number n of the JMP instruction and the LBL n with
the same code number may not be overlapped.
JMP 5
A] LBL 5
B] LBL 5

Note 1: When a JMP instruction jumps to LBL, the status
of each I/O between JMP and LBL is retained.
However, the timer progress value will be updated.
X00000

• In the pre-operation process, the
label instructions A] and B] have 5
as the code numbers, so a duplicate
definition error will occur.

X00001

JMP 0
JMP 1
JMP 2
LBL 1
LBL 0
JMP 3
LBL 2
JMP 4
LBL 3
LBL 4

X00000
Program
X00001

LBL 1

JMP 1
MCS0

Program
LBL 2

X00002

CJMP1(X00000)

TD0

• If X00000 turns on after
X00001 turns on, the
progress value of TD0 will
0.1s
100
be updated even if a jump
is performed from JMP 1
to LBL 1. If X00000
remains on, TD0 will not
turn on even if its progress
value exceeds 100.

Note 2: If the JMP instruction is used in conjunction with
the MCS or MCR instruction, the following actions
will result, so exercise caution when programming.

5] The JMP instruction can jump to a location before the
instruction itself.

LBL 0

JMP 1

LBL 1

4] Nesting of JMP instructions is allowed.

JMP 0

• If a jump is performed
from JMP 0 to LBL 0,
programs A, B and C
will not be executed.

• JMP 0 will jump to LBL 0, which is a
location before the JMP instruction.
• When input X00000 turns on, the loop
between LBL 0 and JMP 0 is escaped
by jumping from CJMP 1 (X00000) to
LBL 1.
Note 3:
• If there is no instruction as CJMP 1
(X00000) to escape from the loop, the
loop from LBL 0 to JMP 0 will
continue endlessly.

5-104

Y00100

MCR0

• When JMP 2 does not
jump, Y00100 will turn on
when X00001 and X00002
are both on.
When
JMP 2 does jump, if
•
X00000 is on, Y00100 will
follow the on/off of
X00002 regardless of the
on/off of X00001.

Do not create a circuit that jumps to outside from
between MCS and MCR.

Chapter 5 Instruction Specifications

Name

Control instructions-5

Ladder format

Label

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

LBL n
Instruction format

Number of steps
Condition

n

Average Maximum

0.5



Steps

LBL n

Usable I/O

Remark

Processing time (µs)

R7F4

1

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

Code number

Other
0 to 255 (Decimal)

•
•
•
•

This instruction indicates the destination of the jump when the JMP n or CJMP n instruction is executed (n is always used in
pairs).
The n in the LBL n cannot be used multiple times in the same program.
This instruction itself does not perform any operation.
Even if a startup condition is used with LBL n, it will be ignored.
Notes

•

This instruction is checked prior to execution, and when there is an error, the following error code is set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code

Special internal output

Error code

34

WRF001

H0001

Error description
Duplicate definition of LBL

Instruction for use
R100

WR0000 = WR0000

R100

(00001)

JMP 0

(00002)

+1

LBL 0

(00003)

JMP 1

(00004)

WR0000 = WR0000

(00005)

-1

(00006)

LBL 1

•
•

When R100 is on, JMP 0 will be executed but JMP 1 will not be executed.
Therefore, the content of WR0000 will decrement by one during each scan.
When R100 is off, JMP 0 will not be executed but JMP 1 will be executed.
Therefore, the content of WR0000 will increment by one during each scan.

5-105

LBL n

Function

Chapter 5 Instruction Specifications

Name

Control instructions-6

Ladder format

FOR

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

1]

z

z

z

FOR n (s)
Instruction format

Number of steps
Condition

Remark

Processing time (µs)

R7F4

Average Maximum

33



Steps

FOR n (s)

3

Usable I/O

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

n

Code number

s

Number of times repeated

{

Other
0 to 49 (Decimal)

{

Function

FOR n (s)

•
•
•
•
•
•
•

Jumps from the NEXT n of the same code number to this instruction.
If the number of times repeated (s) is greater than 0, the instruction following the FOR n (s) is executed.
If the number of times repeated (s) is equal to 0, it jumps to the instruction following the NEXT n.
Use FOR n (s) and NEXT n in pairs. Also, place the NEXT n after FOR n.
The FOR n (s) may not be used more than once.
Use the FOR n (s) and NEXT n in the same program area. (It is not allowed to include FOR n (s) in the normal scan and
NEXT n in the subroutine area.)
The FOR n (s) to NEXT n nesting can be made up to five levels.
Notes

•

•

This instruction is checked prior to execution, and when there is an error, the following error code is set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code

Special internal output

Error code

34

WRF001

H0001

Duplicate definition of FOR

If an error is generated during the execution of the instruction, an error code will be set in the special internal outputs R7F3
and WRF015, and the following program will be executed.
Special internal output

R7F3=1

WRF015

Error code

Error description

H0017

NEXT undefined

H0043

FOR to NEXT error

H0044

Area error for NEXT

H0045

FOR to NEXT nesting error

H0046

FOR nesting overflow

Instruction for use
•

Error description

For the instruction instruction, see NEXT n.

5-106

Chapter 5 Instruction Specifications

Name

Control instructions-7

Ladder format

NEXT

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

1]

z

z

z

NEXT n
Instruction format

Number of steps
Condition

Average Maximum

38



Steps

NEXT n

2

Usable I/O
n

Remark

Processing time (µs)

R7F4

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

Code number

Other
0 to 49 (Decimal)

Function
Subtracts 1 from the number of times repeated (s) for the FORn (s) instruction of the same code number, then jumps to
FORn (s).
NEXT n

•

Notes
•

•

This instruction is checked prior to execution, and when there is an error, the following error code is set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code

Special internal output

Error code

34

WRF001

H0003

Error description
Duplicate definition of NEXT

If an error is generated during the execution of the instruction, an error code will be set in the special internal outputs R7F3
and WRF015, and the following program will be executed.
Special internal output
R7F3=1

WRF015

Error code

Error description

H0016

FOR undefined

H0046

FOR nesting overflow

Instruction for use
R000 DIF0
When
WR0000 > 0

WR0000 = 512
WR0001 = 0
FOR 0(WR0000)
TC0(WR0001) = 0
WR0001 = WR0001 + 1
NEXT 0

When
WR0000 = 0

• When R000 is turned on, the progress value (TC n) of the timer or counter is
cleared with 0 for 512 points.
• Once the FOR to NEXT starts, the instruction keeps executing until (s) is “0.”
• FOR0 (WR0000) performs instructions after TC0 (WR0001) = 0 while
WR0000>0, subtracts “1” from WR0000 at NEXT0, then jumps to FOR0
(WR0000).
• FOR0 (WR0000) jumps to the next instruction within the current box upon
WR0000 = 0.

To the next program

5-107

Chapter 5 Instruction Specifications

Syntax of FOR to NEXT
1] A NEXT instruction with the same code number as the
code number n of the FOR instruction is required after
the FOR instruction.

5] It is possible to escape from a FOR to NEXT loop
using a jump instruction.
FOR 1 (WM001)

FOR 1 (WR0010)

Program
NEXT 2

Program
Program
NEXT 5

• NEXT undefined error
The NEXT instruction with
respect to the FOR instruction
does not exist within the user
program.

CJMP 10 (X00000)
NEXT 1
LBL10

• FOR undefined error
The FOR instruction does not exist
before the NEXT instruction.

6] FOR to NEXT may be nested up to 5 levels. When a
subroutine is included, the FOR to NEXT within the
subroutine is counted.

Program

FOR 1(WR0001)
FOR 2(WR0002)
FOR 3(WR0003)
FOR 4(WR0004)
FOR 5(WR0005)
FOR 6(WR0006)

FOR 5 (WM04F)

Program

• NEXT to FOR error
The NEXT instruction exists
before the FOR instruction.

2] An overlap of FOR and NEXT instructions with the
same code number n is not allowed.
NEXT n

FOR 3 (WR10)

Program
NEXT 3

Program
FOR 3
NEXT 3

• FOR duplicate-definition error
A FOR instruction with the same
code number n is programmed.
• NEXT duplicate-definition error
A NEXT instruction with the same
code number n is programmed.

7] Do not include a startup condition between FOR and
NEXT. If a startup condition is required, create a
circuit as shown below:
X00000

3] FOR and NEXT must be within the same area.

JMP 1

FOR 1(WM001)

Program head
Normal scan

Program C

FOR 1(WR0001)
FOR 2(WR0002)
END

NEXT 1
Subroutine
SB1

Subroutine
SB2

LBL 1

SB1
NEXT 2
FOR 3(WR0003)
RTS

WR0010=20
FOR 1(WR0010)

INT0

Program A

Interrupt scan NEXT 4

NEXT 1
RT1

R005

Program
NEXT 1
FOR3
Program
NEXT 2

WR0010=1
NEXT1

4] Use FOR to NEXT as a nest.

Program
FOR 2 (WM002)

[Operation description]
When X00000 is off, program C is
repeatedly executed for the
number of WM 1 times.
When X00000 is on, program C is
not executed since a jump is
performed from JMP 1 to LBL 1.

8] The number of repeats may be modified within the
program.

SB2
NEXT 3
FOR 4(WR0004)
RTS

FOR 1 (WM001)

• Nesting overflow error

NEXT 6
NEXT 5
NEXT 4
NEXT 3
NEXT 2
NEXT 1

Note: FOR and NEXT duplicatedefinition errors will occur
during operation pre-processing.

Program

The FOR 1 to NEXT 1 loop is
escaped when X00000 turns on
before the loop has been repeated
for the set number of repeats
(content of WM001).

FOR 1(WM001) to NEXT 1 will execute
normally.
• Nesting error
When WM002=0
Since FOR 1(WM001) to NEXT 1 is
prioritized, jump will not be performed
over NEXT 1 from FOR 2 to NEXT 2.
At this time, NEXT 2 generates a FOR
2 undefined error.
When WM002 ≠ 0
FOR 2 will not do anything. Therefore,
NEXT 2 will generate a FOR 2
undefined error.

5-108

Program B

The content of WR0010
decrements by 1 and a jump is
performed to FOR 1 (WR0010).

• When R005 is off
Program B is executed after program A is repeated 20
times.
• When R005 is on
The repeat counter WR0010 changes to 1, and since the
NEXT 1 processing subtracts 1 from it, the content of
WR0010 becomes 0. Therefore, the repeating of
program A is terminated and program B is execute

Chapter 5 Instruction Specifications

Name

Control instructions-8

Ladder format

Call subroutine

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

1]

z

z

z

CAL n
Instruction format

Number of steps
Condition

n

Remark

Average Maximum

24



Steps

CAL n

Usable I/O

Processing time (µs)

R7F4

2

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

Code number

Other
0 to 99 (Decimal)

• If the startup condition of CAL n is on, this instructions executes the subroutine program (the program sandwiched by SB n and
RTS) of the same code number.
• If the startup condition is off, the next program is executed.
• Up to 5 levels of CAL (nesting) for another subroutine can be performed within a subroutine.
• It is possible to call a subroutine from within an interrupt scan program.
Notes
• If an error is generated during the execution of the instruction, an error code will be set in the special internal outputs R7F3 and
WRF015, and the following program will be executed.
Special internal output
R7F3=1

WRF015

Error code

Error description

H0013

SB undefined

H0041

Nesting error

Instruction for use

R000
CAL n
Other program

R000 turns
ON

R000 turns
OFF

• When R000 is on, a subroutine program is executed by CAL n. After
the execution, the program is re-executed from the code following the
CAL n.
• When R000 is off, the subroutine program is not executed, and the
next program is executed.

END
SB n
Subroutine program
RTS

5-109

CAL n

Function

Chapter 5 Instruction Specifications

Name

Control instructions-9

Ladder format

Start subroutine program

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

1]

z

z

z

SB n
Instruction format

Remark

Average Maximum

Number of steps
Condition

0.5



Steps

SB n

1

Usable I/O
n

Processing time (µs)

R7F4

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

Code number

Other
0 to 99 (Decimal)

Function

SB n

•
•
•
•
•

This instruction indicates the start of a subroutine program (processing is not performed).
The n in the SB n cannot be used more than once in the same program.
Even if a startup condition is used for SB n, it will be ignored.
Always use SB n and RTS in pairs.
Code the SB n to RTS subroutine program after the END instruction.
Notes

•

This instruction is checked prior to execution, and when there is an error, the following error code is set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code

Special internal output

Error code

Error description

34

WRF001

H0004

Duplicate definition of SB

H0013

SB undefined

Instruction for use
• When CAL 0 is executed, SB 0 to RTS is executed as a subroutine.
• When CAL 1 is executed, SB 1 to RTS is executed as a subroutine.

END

SB 0
Subroutine 0 program
SB 1
Subroutine 0.1 program
RTS

SB 0 SB 1

5-110

Chapter 5 Instruction Specifications

Name

Control instructions-10

Ladder format

End of subroutine program (RETURN SUBROUTINE)

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

RTS
Instruction format

Number of steps
Condition

Remark

Average Maximum

25



Steps

RTS

1

Usable I/O

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

•
•
•

This instruction declares the end of a subroutine program.
When this instruction is executed, the program is resumed starting from the line following the CAL n instruction that called
the subroutine.
Do not set a startup condition with this instruction.
Notes

•

This instruction is checked prior to execution, and when there is an error, the following error code is set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code

Special internal output

34

WRF001

Error code

Error description

H0011

SB undefined

H0020

SB area error

H0030

RTS startup condition error

Instruction for use
1] 2]
R000

CAL 0

3]

1]
2]

END
Subroutine 0
R001 program

SB 0
CAL 1

Subroutine 0 program
RTS
SB 1
Subroutine 1 program
RTS

3]

The program is executed when R000 and R001 are both off
The program is executed when R000 is on and R001 is off
CAL 0 is executed, then the subroutine 0 program is executed.
CAL 1 is not executed, the subroutine 0 program is terminated and the
execution is returned to the code following the CAL 0.
The program is executed when R000 and R001 are both on
CAL 0 is executed, then the subroutine 0 program is executed.
CAL 1 is executed, then the subroutine 1 program is executed.
The subroutine 1 program is completed and execution is returned to the code
following the CAL 1.
The subroutine 0 program is completed and execution is returned to the code
following the CAL 0.

5-111

RTS

Function

Chapter 5 Instruction Specifications

Name

Control instructions-11

Ladder format

Start interrupt scan program (INTERRUPT)

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

INT n
Instruction format

Number of steps
Condition

Average Maximum

0.5



Steps

INT n

1

Usable I/O
n

Remark

Processing time (µs)

R7F4

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

{

Interrupt priority

Other
0 to 2 , 16 to 19, 20
to 27 (Decimal)

Function
•
•
INT n

•
•
•
•
•
•

This instruction declares the start of an interrupt scan program.
n = 0 to 2 indicates a periodical interrupt scan. n = 16 to 19 indicates interrupt input. n = 20 to 27 indicates an interrupt scan
when the counter input exceeds the preset value.
It is set to the 10 ms periodic scan when n = 0, 20 ms periodic scan when n = 1, and 40 ms periodic interrupt scan when n =
2.
The smaller the number n, the higher the interrupt priority.
Always use INT n and RTI in pairs.
Even if a startup condition is used for INT n, it will be ignored.
Code the INT n to RTI subroutine program after the END instruction.
The n in INT n cannot be used more than once within the same program.
Notes

•

This instruction is checked prior to execution, and when there is an error, the following error code is set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code

Special internal output

Error code

Error description

34

WRF001

H0005

Duplicate definition of INT

H0014

INT undefined

Instruction for use
• The program between INT0 and RTI is started and executed every 10 ms.

END
INT 0
10 ms interrupt scan program

INT 0
scan

RTI

5-112

Chapter 5 Instruction Specifications

Name

Control instructions-12

Ladder format

End interrupt scan program (RETURN INTERRUPT)

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

z

z

z

z

z

RTI
Instruction format

Number of steps
Condition

Remark

Average Maximum

0.5



Steps

RTI

1

Usable I/O

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

Item number

Other

•
•
•

This instruction declares the end of an interrupt scan program.
When this program is executed, the processing is returned to the program that was executing before the interrupt scan was
performed.
Do not set a startup condition with this instruction.
Notes

•

This instruction is checked prior to execution, and when there is an error, the following error code is set in the special
internal output WRF001. Also, the CPU error code '34' is set to special internal output WRF000.
CPU error code

Special internal output

34

WRF001

Error code

Error description

H0012

RTI undefined

H0021

RTI area error

H0031

RTI startup condition error

Instruction for use
• A 0.01s timer is created using 10 ms interval interrupt.
• WM000, WR0000 and R000 are used for the set value, progress value
and timer coil, respectively.
• When X00000 is off, the progress value and timer coil are cleared.
• When X00000 is on, the progress value increments by 1 every 10 ms.
• The timer coil is turned on upon WM000 is less than or equal to
WR0000.

INT 0
X00000

X00000

WR0000=0
R000=0
WR0000=WR0000+1

WM000

R000

<=

SET

WR0000
RTI

5-113

RTI

Function

Chapter 5 Instruction Specifications

Syntax of SB n, RTS, INT n and RTI
1] A subroutine can be programmed between a normal scan
and interrupt scan, between two interrupt scans, or after
the final interrupt scan.

5] It is also possible to program a subroutine with
multiple entry points and one exit.
SB 1
SB 1

Program head
Normal scan

END

Subroutine area
Interrupt
scan

INT 1
RTI

Subroutine area
Interrupt
scan

INT 2
RTI

Subroutine area
Program end

SB 1
Subroutine 1
RTS
SB 2
Subroutine 2
RTS

SB 3

JMP 1

JMP 1

SB 2
JMP 1
SB 3

LBL 1
RTS

SB 10 Subroutine 10
RTS

LBL 1
RTS

SB 11
Subroutine 11
RTS
SB 12 Subroutine 12
RTS

6] It is also possible to program a interrupt scan with
many entry points and one exit.

2] Program the subroutine start (SB n) and subroutine
end (RTS) instructions without specifying startup
conditions.

RTI

Startup
condition

SB 2

JMP 1

INT 0

INT 1

INT 2

JMP 1

INT 0
JMP 1

JMP 1

INT 2
JMP 1
INT 1

LBL 1

SB n

RTI

LBL 1
RTI

Program
Startup
condition

• The RTS startup condition error
will occur during operation preprocessing.

RTS

7] Nesting of subroutines is allowed up to 5 levels.
1st level 2nd level 3rd level 4th level 5th level

3] Program the interrupt scan start (INT n) and scan complete
(RTI) instructions without specifying startup conditions.

SB 1

SB 20
CAL 30

CAL 20
Startup
condition

INT n

RTS

RTS

SB 30
CAL 40
RTS

SB 40
CAL 50
RTS

SB 50
RTS

Program
Startup
condition

RT1

Program head
END
SB 20
RTS

4] The same subroutine can be called from a normal scan,
interrupt scan or subroutine.

SB 1
RTS

INT 0
RTI

Program head
Normal scan

CAL 1

SB 40
RTS

CAL 1

SB 30
RTS

END
SB 2

SB 50
RTS

Subroutine 2

CAL 1

Subroutine 1

RTS
SB 1
RTS
INI 0

Interrupt scan

CAL 1
RTI

5-114

(1) As shown to the left, the subroutine
program order and nesting order
have no relationship.

Chapter 5 Instruction specifications

Name

Transfer command-1

Ladder format

General purpose port communication command

R7F4

Condition code
R7F3 R7F2 R7F1

DER

ERR

SD

V

C

↕

z

z

z

z

TRNS 0 (d, s, t)
Command format

Average

Number of steps
Condition

Steps

-

5

TRNS 0 (d, s, t)
Bit
Usable I/O

Processing time (µs)

R7F0

X

Y

R,
L,
M

Word

Remark

Maximum

80

2,078

Double word

TD, SS,
WR,
DR,
CU, CT
WX WY WM TC DX DY DM

Constant

Item number

Others

{

d

Dummy

s

Parameter area

t

Communication control

{

s to s+14

{

t to t+11

(1)

This is a command to send data via general purpose port. It is also possible to receive data after data sending.

(2)

Parameter "d" is dummy. Assign WY10. (Actual data in Y100 to Y115 is not influenced.)

(3)

Parameter "s" is starting address of parameter table for communication setting.

(4)

Parameter "t" is starting address of bit table for communication control.

(5)

"s" parameter
s

[0] Return code

s+1

[1] System area
(Do not use this area.)

s+3

[2] Timeout

s+4

[3] Address of sending area

s+6

[4] Reserve area for data sending (word)

s+7

[5] Address of receiving area

s+9

[6] Reserve area for data receiving (word)

s+A

[7] Receiving data length (byte)

s+B

[8] Start code

s+C

[9] End code

s+D

[10] Communication speed

s+E

[11] Communication format

[0]

Return code :

Result of TRNS 0 command is set in
lower 8 bits.
Completed
0
Error
≠ 0

[1]

System area :

This area is used by system (CPU) while
TRNS 0 operation. It is not allowed for
users to use this area.

If this area is written, CPU might stop operation due to
system error.
!

[2]

Timeout :

: Access forbidden
: User setting area

5-115

Timeout setting from command executed
to completed.
=0 : Timeout disabled
≠0 : Timeout enabled [×10ms]
Max. HFFFF

TRNS 0 (d, s, t)

Function

Chapter 5 Instruction specifications

[3]

Address of sending area :
Address number and address type are configured in 2 words as below.
Type : WR → H000A

s+4

WM → H000C
s+5

I/O No.: H0000 -

[4]

Reserved data size for data sending. : This is not actual data size but reserved size. Set it by "Word".

[5]

Address of receiving area :
Address number and address type are configured in 2 words as below.
(Data format is as same as sending area.)

[6]

Reserved data size for data receiving. : This is not actual data size but reserved size. Set it by "Word".
*1

[7] Receiving data length :
If receiving data is found by data length, set this parameter by "Byte". The maximum size is 1,024 byte. If data is
more than 1,024 bytes or reserved area, TRNS command fails with DER="1".
*1

[8] Start code :
If receiving data is found by start code, set this parameter.
b15

b7

b0

TRNS 0 (d, s, t)

Start code (H00 - HFF)

= 0 : Start code disabled.
= 1 : Start code enabled.
*1

[9] End code :
If receiving data is found by end code, set this parameter.
b15

b7

b0

End code (H00 - HFF)

= 0 : End code disabled.
= 1 : End code enabled.

[10] Communication speed :

[11] Communication format

Baud rate

Value

Format

Value

300 bps

H0000

7 bits, even parity, 2 stop

H0000

600 bps

H0001

7 bits, odd parity, 2 stop

H0001

1,200 bps

H0002

7 bits, even parity, 1 stop

H0002

2,400 bps

H0003

7 bits, odd parity, 1 stop

H0003

4,800 bps

H0004

8 bits, non parity, 2 stop

H0004

9,600 bps

H0005

8 bits, non parity, 1 stop

H0005

19,200 bps

H0006

8 bits, even parity, 1 stop

H0006

38,400 bps

H0007

8 bits, odd parity, 1 stop

H0007

57,600 bps

H0008

5-116

Chapter 5 Instruction specifications

*1

Received data is defined by either of following 4 ways depending on setting in [7] s+A to [9] s+C.
(a)

*2

Start code and data size

Data length

s+A : Data length (Byte)
s+B : H80 (=Start code)
Start code

s+C : H0000
(b)

Start and end code

*2

s+A : H0000
s+B : H80 (=Start code)

Start code

s+C : H80 (=End code)
(c)

End code

End code
s+A : H0000
s+B : H0000

End code

s+C : H80 (=End code)
(d)

Data length

Data length
s+A : Data length (Byte)
s+B：H0000
s+C：H0000

(6)

In case of start code used, CPU can fail to receive due to buffer size full if data with wrong start code is sent.

"t" parameter
t+B

t

[B] [A] [9] [8] [7] [6] [5] [4] [3] [2] [1]

[0]

: Set by user

[0] Execution bit:
Set "1" by user program to send data. This bit is reset after communication completed.
[1] Communication completed :
This bit is set "1" when communication completed without error, and reset at communication starting.
[2] Communication failed :
This bit is set "1" when communication fails, and reset at communication starting.
[3] Initialize :
Set "1" by user program to initialize TRNS 0 command. If this bit is on while communication, the communication
is forced to be stopped.
[4] Initialize completed :
This bit is set "1" when initializing completed without error. Initialize bit [3] is reset at this timing.
[5] Receive enabled :
Set "1" by user program if CPU needs to receive data after data sending. This bit is reset after communication
completed.
[6] Parity error flag :
This bit is set "1" when parity error detected.
[7] Framing error :
This bit is set "1" when framing error detected.
[8] Overrun error :
This bit is set "1" when overrun error detected.

5-117

TRNS 0 (d, s, t)

*2

Chapter 5 Instruction specifications

[9]

Timeout :
This bit is set "1" when timeout detected.

[A] Input buffer full :
This bit is set "1" when input buffer full
[B] Conflict error :
This bit is set "1" when TRNS 0 or RECV 0 commands are duplicated.
Bit [6] to [B] is reset at initializing and TRNS 0 executed.

(7) Sending/receiving data format
Set sending data as follows, and Receiving data is set as follows.
[1] Sending/receiving data byte is even.

[2] Sending/receiving data byte is odd.

Sending/Receiving data byte (N)
1st byte

Sending/Receiving byte (N)

2nd byte

rd

1st byte

th

2nd byte

3 byte

4 byte

3 byte

4th byte

5th byte

6th byte

5th byte

6th byte

7th byte

8th byte

7th byte

8th byte

rd

…
…
th

N-1 byte

N-2th byte

N-1th byte

Nth byte

(ignored)

Reserve area
for data
sending/receiving

th

N byte

TRNS 0 (d, s, t)

Caution
z
z

z
z
z
z

z

Be sure to switch port type at first from dedicated port to general purpose port by FUN 5 command in user program.
If CPU receives data by RECV command after data sending, received data could be failed depending on timing. In such a
case, TRNS command with "receive enabled" is recommended.
No contact nor condition is allowed to use with TRNS 0 command.
Be sure to set [0] Execution bit high in 2nd scan or later. (Not in 1st scan)
If parameter setting is wrong, error code H52 (TRNS/RECV command error) is set in WRF000 in some cases.
ER signal is set on in the following condition.
Communication executed properly.
ER signal is set off in the following condition.
Initialized bit being set "1" while communication.
CPU status changed RUN→STOP→RUN while communication
Timeout while communication.
s, t parameters overwritten and range error while communication.

5-118

Chapter 5 Instruction specifications

Sample program
R7E3

R7E3

WR0

Reserve area for data sending :
16 words from WR0

WR100

Reserve area for data receiving :
256 words from WR100
Data receiving definition
Start code : H02, End code : H0D
Communication speed : 19.2k bps
Format : 7 bits, even, 2 stop
Port 2 configured as general purpose port.
Sent data : 9 bytes
Inverter (SJ300/L300P) command
FWD RUN for station No.18
02 31 38 30 30 31 33 38 0D
(STX 18 00 1 38 CR) [38=BCC]

WR100 = 9
WR101 = H0231
WR102 = H3830
WR103 = H3031
WR104 = H3338
WR105 = H0D00
Switch

DIF0

R0
S

When the switch is ON, execution bit R0 is ON, and
data is sent out from CPU port.

R5
S

R5 enables data receiving from the other device.

TRNS 0 (WY10, WM100, R0)

Description
TRNS 0 parameter and sent data are configured at 1st scan by R7E3 contact.
When the switch is ON, execution bit R0 is ON, and data is sent out from CPU port.

5-119

TRNS 0 (d, s, t)

WM103 = 0
WM104 = H000A
WM105 = H0000
WM106 = 16
WM107 = H000A
WM108 = H0100
WM109 = 256
WM10A = 0
WM10B = H8002
WM10C = H800D
WM10D = 6
WM10E = 0
WR10 = H0200
FUN 5 (WR10)

R7E3 : 1st scan ON
Timeout = 0

Chapter 5 Instruction specifications
TRNS/RECV command return code table
Return code

Name

H00
H21

Completed properly
Range error
Reserve area for sending
setting error
Reserve area for sending
range error
Reserve area for receiving
setting error
Reserve area for receiving
range error
Sending data error
Receiving data error
Area overlapping error
*2

Operation completed without error
Parameter "s" and "t" is out of available I/O range.

H30

Timeout *1

Communication is not completed within configured time.

H40
H41
H42
H43
H44
H45
H46

Receiving area over *3
Parity error *4
Framing error *4
Overrun error detected
Conflict error
Parameter error
Port type error

Received data is beyond reserved area
Parity error detected
Framing error detected
Overrun error detected
TRNS 0/RECV 0 duplicated
Baud rate or format setting is wrong
Port type is not general purpose port.

H22
H23
H24
H25
H26
H27
H28

*2

Description

Countermeasure
-

Parameter setting is wrong.
Parameter is out of available I/O range.
Parameter setting is wrong.

Set right value.

Parameter is out of available I/O range.
Configured sending data length is beyond reserve area
Configured receiving data length is beyond reserve area
Parameter s, t, or reserve area is overlapped.
Set longer timeout or check the
program.
Configure bigger size
Check wiring and data format.
Execute one by one
Set right value.
Configure general purpose port.

Area overlapping error (H28) is not detected in the following case.
TRNS n (d,s,t)
b15

TRNS 0 (d, s, t)

t+1

b0
t
t+2

Data overlapping

If starting area of "s" parameter and "t" parameter is overlapped, error code H21 can be set instead of H28.
*3

Received data is stored as long as reserved area. (1,024 bytes)

*4

Data is not guaranteed.

5-120

Chapter 5 Instruction specifications

Name

Transfer command-2

Ladder format

General purpose port communication command

R7F4

Condition code
R7F3 R7F2 R7F1

DER

ERR

SD

V

C

↕

z

z

z

z

RECV 0 (d, s, t)
Command format

Average

Number of steps
Condition

Steps

-

5

RECV 0 (d, s, t)
Bit
Usable I/O

Processing time (µs)

R7F0

X

Y

R,
L,
M

Word

80

Remark

Maximum

2,064

Double word

TD, SS,
WR,
DR,
CU, CT
WX WY WM TC DX DY DM

Constant

Item number

Others

{

d

Dummy

s

Parameter area

t

Communication control

{

s to s+14

{

t to t+11

(1)

This is a command to send data via general purpose port. It is also possible to receive data after data sending.

(2)

Parameter "d" is dummy. Assign WX0. (Actual data in X00 to X15 is not influenced.)

(3)

Parameter "s" is starting address of parameter table for communication setting.

(4)

Parameter "t" is starting address of bit table for communication control.

(5)

"s" parameter
s

[0] Return code

s+1

[1] System area
(Do not use this area.)

s+3

[2] Timeout

s+4

[3] Address of sending area

s+6

[4] Reserve area for data sending (word)

s+7

[5] Address of receiving area

s+9

[6] Reserve area for data receiving (word)

s+A

[7] Receiving data length (byte)

s+B

[8] Start code

s+C

[9] End code

s+D

[10] Communication speed

s+E

[11] Communication format

[0]

Return code :

Result of RECV 0 command is set in
lower 8 bits.
Completed
0
Error
≠ 0

[1]

System area :

This area is used by system (CPU) while
RECV 0 operation. It is not allowed for
users to use this area.

If this area is written, CPU might stop operation due to
system error.
!

[2]

Timeout :

: Access forbidden
: User setting area

5-121

Timeout setting from command executed
to completed.
=0 : Timeout disabled
≠0 : Timeout enabled [×10ms]
Max. HFFFF

RECV 0 (d, s, t)

Function

Chapter 5 Instruction specifications

[3]

Address of sending area :
Address number and address type are configured in 2 words as below.
Type : WR → H000A

s+4

WM → H000C
s+5

I/O No.: H0000 -

[4]

Reserved data size for data sending. : This is not actual data size but reserved size. Set it by "Word".

[5]

Address of receiving area :
Address number and address type are configured in 2 words as below.
(Data format is as same as sending area.)

[6]

Reserved data size for data receiving. : This is not actual data size but reserved size. Set it by "Word".
*1

[7] Receiving data length :
If receiving data is found by data length, set this parameter by "Byte". The maximum size is 1,024 byte. If data is
more than 1,024 bytes or reserved area, RECV command fails with DER="1".
*1

[8] Start code :
If receiving data is found by start code, set this parameter. (See TRNS command)
*1

[9] End code :
If receiving data is found by end code, set this parameter. (See TRNS command)
RECV 0 (d, s, t)

[10] Communication speed (See TRNS command)
[11] Communication format (See TRNS command)

*1

Received data is defined by either of following 4 ways depending on setting in [7] s+A to [9] s+C.

*2

In case of start code used, CPU can fail to receive due to buffer size full if data with wrong start code is sent.

5-122

Chapter 5 Instruction specifications

(6)

"t" parameter
t+B

t

[B] [A] [9] [8] [7] [6] [5] [4] [3] [2] [1]

[0]

: Set by user

[0]

Execution bit:
Set "1" by user program to send data. This bit is reset after communication completed.

[1]

Communication completed :
This bit is set "1" when communication completed without error, and reset at communication starting.

[2] Communication failed :
This bit is set "1" when communication fails, and reset at communication starting.
[3] Initialize :
Set "1" by user program to initialize RECV 0 command. If this bit is on while communication, the communication
is forced to be stopped.
[4] Initialize completed :
This bit is set "1" when initializing completed without error. Initialize bit [3] is reset at this timing.
[5] Send enabled :
Set "1" by user program if CPU needs to send data after data receiving. This bit is reset after communication
completed.
[6] Parity error flag :
This bit is set "1" when parity error detected.
[7] Framing error :
This bit is set "1" when framing error detected.

[9]

RECV 0 (d, s, t)

[8] Overrun error :
This bit is set "1" when overrun error detected.
Timeout :
This bit is set "1" when timeout detected.

[A] Input buffer full :
This bit is set "1" when input buffer full
[B] Conflict error :
This bit is set "1" when TRNS 0 or RECV 0 commands are duplicated.
Bit [6] to [B] is reset at initializing and RECV 0 executed.

(7) Sending/receiving data format (See TRNS 0 command)
Caution
z
z

z
z
z
z

z

Be sure to switch port type at first from dedicated port to general purpose port by FUN 5 command in user program.
If CPU receives data by RECV command after data sending, sent data could be failed depending on timing. In such a case,
RECV command with "send enabled" is recommended.
No contact nor condition is allowed to use with RECV 0 command.
Be sure to set [0] Execution bit high in 2nd scan or later. (Not in 1st scan)
If parameter setting is wrong, error code H52 (TRNS/RECV command error) is set in WRF000 in some cases.
ER signal is set on in the following condition.
Communication executed properly.
ER signal is set off in the following condition.
Initialized bit being set "1" while communication.
CPU status changed RUN→STOP→RUN while communication
Timeout while communication.
s, t parameters overwritten and range error while communication.

5-123

Chapter 5 Instruction Specifications

Name

FUN instructions-1

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

FUN 5 (s)
Instruction format

X

Y

114

Condition

Steps

—

3

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

s

Argument

{

s+1

(system area)

{

s+2

(system area)

{

Remark

Average Maximum

Number of steps

FUN 5 (s)

Usable I/O

General purpose port switching

-

Constant

Item number

Other

Function
This command is to switch dedicated port (programming port) to general purpose port.
S

Port number

Current setting

S+1 System area
S+2 System area

Port number
H01 : Port 1
H02 : Port 2
* Error with the other values
Current setting
H00 : Dedicated port (Programming port)
H01 : Port 1 is general purpose port
H02 : Port 2 is general purpose port

FUN 5 (s)

Notes
•
•
•
•

General purpose port can be configured only one port. If either port is configured general purpose port, FUN 5 command for
the other port is ignored with DER=1.
General purpose works only when CPU is in RUN mode. When CPU status is in STOP, the port is automatically switched
back to dedicated port (programming port).
It is impossible to switch from general purpose to dedicated port while CPU is in RUN status.
FUN 5 does not work if port 1 is configured as modem mode.

Program example
X00000

DIF0

LD
X00000
AND DIF0
[
WR0100 = H0200
FUN 5 (WR0100)
]

WR0100 = H0200
FUN 5 (WR0100)

Program description
Port 2 is switched to general purpose port at rising edge of X0000 input.

5-124

Chapter 5 Instruction Specifications

Item number

Name

FUN instructions-2

Ladder format

I/O refresh (All points)

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

FUN 80 (s)

DER

ERR

SD

V

C

* (ALREF (s))

↕

z

z

z

z

Instruction format

Number of steps

432

Condition

Steps

—

3

FUN 80 (s)

Remark

Average Maximum



Usable I/O
s

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

* (ALREF (s))

Other

{

Argument (dummy)
Function
•
*

This instruction performs I/O refresh of all data in the external I/Os (including link area) during scanning.
( ) indicates the display when the Ladder Editor is used.
Notes

•
•
•

This instruction performs I/O refresh of all external I/Os.
If refresh of certain area is to be performed, use FUN81 or FUN82.
If the argument s exceeds the maximum I/O number, DER is set to “1” and no processing will be performed.
Assign argument s as a one-word dummy. The I/O specified for argument s (WR and WM) will not be affected.

Program example
FUN 80 (WR0)
Y100

FUN 80 (WR0)

3]

Program description
1 scan

1 scan

I/O refresh

FUN 80 1]

FUN 80 3]
Program execution 2]

2]

I/O refresh

5-125

FUN 80 (s)

X0

1]

Chapter 5 Instruction Specifications

Item number

Name

FUN instructions-3

Ladder format

I/O refresh (Input/output)

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

FUN 81 (s)

DER

ERR

SD

V

C

* (IOREF (s))

↕

z

z

z

z

Instruction format

Number of steps

244

Condition

Steps

—

3

FUN 81 (s)

Remark

Average Maximum



Usable I/O
s

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

* (IOREF (s))

Other

{

Type
Function
s

Input type

H00: Input refresh
H01: Output refresh

•
•
•
*

Depending on the I/O type of the area specified by s, refresh is performed with respect to I/O modules only, output modules
only.
Refresh is performed by each slot assignment according to the I/O assignment.
If the refresh processing is completed normally, DER is set to '0.'
( ) indicates the display when the Ladder Editor is used.
Notes

•
•

If the I/O type is other than H00 or H01, DER is set to “1” and no processing will be performed.
If the argument s exceeds the maximum I/O number, DER is set to “1” and no processing will be performed.

FUN 81 (s)

Program example
R000

R001

DIF0

DIF1

LD
AND
[
WR0004
FUN 81
]
LD
AND
[
WR0004
FUN 81
]

WR0004 = 0
FUN 81 (WR0004 )

WR0004 = 1
FUN 81 (WR0004 )

Program description
•
•

Upon leading of R000, the input module is refreshed.
Upon leading of R001, the output module is refreshed.

5-126

R000
DIF0
=0
(WR0004)
R001
DIF1
=1
(WR0004)

Chapter 5 Instruction Specifications

Item number

Name

FUN instructions-4

Ladder format

I/O Refresh (slot)

Condition code
R7F3

R7F2

R7F1

R7F0

FUN 82 (s)

DER

ERR

SD

V

C

* (SLREF (s))

↕

z

z

z

z

Instruction format

Number of steps

Average Maximum



311

Condition

Steps

—

3

FUN 82 (s)

Remark

Processing time (µs)

R7F4

Usable I/O
s

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Constant

* (SLREF (s))

Other

{

Number of points

s+1 and
Slot location number
beyond

Designate the slot
location.

{

Function
s

Number of points to be refreshed

n ≤ 64
Refresh slot location number is
designated by unit and slot number.

s+1 Refresh slot location number
s+2 Refresh slot location number
:

:

:

:

•
•
•
•
•
*

Performs refresh of the designated module for the number of points specified by s, starting with area s+1.
Refresh is performed by slot.
The slot location numbers stored in areas s+1 and subsequent are designated by the unit number and slot number.
The maximum number of points to be refreshed (n) is 64 points. The points exceeding 64 points are not refreshed.
If refresh processing is completed normally, DER is set to “0.”
( ) indicates the display when the Ladder Editor is used.

Program example
R000

DIF0

LD
AND
[
WR0000
WR0001
WR0002
FUN82
]

WR0000 = H0002
WR0001 = H0000
WR0002 = H0010
FUN 82 (WR0000)

R000
DIF0
= H0002
= H0000
= H0010
(WR0000)

Program description
•

Upon leading of R000, the two slots designated after WR0001 (unit 0, slot 0) and (unit 1, slot 0) are refreshed.

5-127

FUN 82 (s)

s+n Refresh slot location number

Chapter 5 Instruction Specifications

Notes
•
•
•
•

Set the unit number (0 to 3) and slot number (0 to 1) after s+1. For other set values, DER is set to “1” and that slot will not
be processed.
If there is no I/O assignment to the designated slot, DER is set to “1” and that slot will not be processed.
If the number of s+n points exceeds the maximum I/O number, DER is set to “1” and no processing will be performed.
If the number of points exceeds 64, DER is set to “1” and the points exceeding 64 will not be processed (refresh will be
performed for up to 64 points).

Slot location number
The slot locations are designated using the unit number and slot number.
The unit number and slot number are set as follows in one word units:
b15

b12
0 to 0

b7
0 to 0

b3
Unit number

b0
Slot number

FUN 82 (s)

5-128

Chapter 5 Instruction Specifications

Name

FUN instructions-5

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

Instruction format

X

Y

147

Condition

Steps

—

3

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (Counter
number, operation
control value)

Remark

Average Maximum

Number of steps

FUN 140 (s)

s

Processing time (µs)

R7F4
FUN 140 (s)

Usable I/O

High-speed Counter Operation Control

Constant

Item number

Other

{

Function
15
S
•

87
Counter number

0

Operation instruction

Counter number:
H01 to H04
Operation instruction: H00 – Stop,
H01 – Start

Performs the starting and stopping of the count operation for the specified counter.

•
•
•
•
•
•
•
•

If a value other than H01 to H04 is specified for the counter number and the operation instruction is set to a value other than
H00 or H01, DER will be set to “1” and no processing will be performed.
If the specified counter number is set to a function other than a corresponding external I/O counter (single-phase counter,
two-phase counter), DER will be set to “1” and no processing will be performed.
Since Counter 4 is invalid when a 10-point CPU is used, if Counter 4 is specified, DER will be set to “1” and no processing
will be performed.
If the specified counter number is unable to make an output (PI/O function setting result by R7F5), DER will be set to “1”
and no processing will be performed.
This instruction is only used to start and stop the counter operation. Other counter settings will not be changed.
The counter operation will start after the power is turned back on even if the power is turned off when the count operation is
stopped by this instruction. The operation of the high-speed counter will be stopped only when this instruction specifies the
stop instruction.
The counter operation will continue when the CPU operation is stopped.
When the count operation stops, the progress value update also stops. When starting the count operation, the progress value
is cleared and then the operation starts.

Program example

R0

DIF0

LD
AND
[
WR0
FUN
]

WR0 = H0101
FUN 140 (WR0)

R0
DIF0
= H101
140 ( WR0 )

Program description
•

Prior to starting a counter operation, various settings required for the counter operation are reflected in the special internal
outputs, and the PI/O function setting flag (R7F5) is turned on while the CPU is being stopped.
For details on the special internal output settings, see Chapter 8.
Starts the counter No. 1 operation.

5-129

FUN 140 (s)

Notes

Chapter 5 Instruction Specifications

Name

FUN instructions-6

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

Instruction format

Steps

—

3

X

Y

Bit
R,

TD, SS,

M

CU, CT



138

Condition

Word
WR,

Double word
DR,

WX WY WM TC DX DY DM

Argument (Counter
number, output
instruction)

Remark

Average Maximum

Number of steps

FUN 141 (s)

s

Processing time (µs)

R7F4
FUN 141 (s)

Usable I/O

High-speed Counter Coincidence Output Control

Constant

Item number

Other

{

Function
15
S
•
•

87
Counter number

0

Operation instruction

Counter number:
Output instruction:

H01 to H04
H00 – Coincidence output disable,
H01 – Coincidence output able

Performs the enabling and disabling of the coincidence output for the specified counter.
Output is turned off when the coincidence output disabling instruction is issued while coincidence output is being performed
(while coincidence output is on).
Notes

•
•
FUN 141 (s)

•
•
•
•
•
•

If a value other than H01 to H04 is specified for the counter number and the output instruction is set to a value other than
H00 or H01, DER will be set to “1” and no processing will be performed.
If the specified counter number is set to a function other than a corresponding external I/O counter (single-phase counter,
two-phase counter), DER will be set to “1” and no processing will be performed.
Since Counter 4 is invalid when a 10-point CPU is used, if Counter 4 is specified, DER will be set to “1” and no processing
will be performed.
If the specified counter number is unable to make an output (PI/O function setting result by R7F5), DER will be set to “1”
and no processing will be performed.
This instruction is only used to enable and disable the coincidence output. Other counter settings will not be changed and it
will not affect the count operation.
When coincidence output is enabled by this instruction when the coincidence conditions are already established, coincidence
output will be turned on when the instruction is issued.
The control contents of this instruction will be reflected in the output control flag (R7FC to R7FF) of the corresponding
counter number.
When the CPU is not operating, the counter coincidence output continues/stops according to the setting of the special
internal output (output selection at R7DC stop).

Program example
R1

DIF1

LD
AND
[
WR1
FUN
]

WR1 = H0101
FUN 141 (WR1)

R1
DIF1
= H101
141 ( WR1 )

Program description
•

Sets the coincidence output validity for the counter No. 1.
Because the counter coincidence output Yxxx cannot be used in the ladder program (including the monitor, etc.), do not use
it for the coil such as a contact.

5-130

Chapter 5 Instruction Specifications

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

Instruction format

X

Y

156

Condition

Steps

—

3

Bit
R,

TD, SS,

M

CU, CT

Remark

Average Maximum

Number of steps

FUN 142 (s)

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Other

{

Argument (Counter
number, Up/Down
instruction)

s

Processing time (µs)

R7F4
FUN 142 (s)

Usable I/O

High-speed Counter Up-Count/Down-count Control (Single
phase counter only)

Name

FUN instructions-7

Constant

Item number

Function
15
S
•
•

87
Counter number

0
Up/Down instruction

Counter number:
H01 to H04
Up/down instruction: H00 – Up-count,
H01 – Down-count

This controls the up-count/down-count of the specified counter.
Up-count and down-count control can be performed during the count operation.

•
•
•
•
•
•

If a value other than H01 to H04 is specified for the counter number and the up/down instruction is set to a value other than
H00 or H01, DER will be set to “1”and no processing will be performed.
If the specified counter number is set to a function other than single-phase counter, DER will be set to “1” and no processing
will be performed.
Since Counter 4 is invalid when a 10-point CPU is used, if Counter 4 is specified, DER will be set to “1” and no processing
will be performed.
If the specified counter number is unable to make an output (PI/O function setting result by R7F5), DER will be set to “1”
and no processing will be performed.
This instruction is only used to control the up-count and down-count. Other counter settings will not be changed and it will
not affect the count operation.
The control contents of this instruction will be reflected in bits 11 to 8 of the special internal output WRF07E of the
corresponding counter number.

Program example
R2

DIF2

LD
AND
[
WR2
FUN
]

WR2 = H0101
FUN 142 (WR2)

R2
DIF2
= H101
142 ( WR2 )

Program description
•

Switches the counter operation of the counter No. 1 to down count.
The count edges (leading/trailing) will follow the specification of the special internal output (WRF07E).

5-131

FUN 142 (s)

Notes

Chapter 5 Instruction Specifications

Name

FUN instructions-8

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

FUN 143 (s)
Instruction format

X

Y

175

Condition

Steps

—

3

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (counter
number)
Argument
s+1 (Replacement value
storage area)

Remark

Average Maximum

Number of steps

FUN 143 (s)

Usable I/O

High-speed Counter Current Value Replacement

Constant

Item number

Other

{

s

{

Function
15
S

8 7
Counter number

S+1

•

0
**

Counter number:
**:

H01 to H04
Disable area

Replacement value storage area

The counter value of the specified counter number will be replaced by the data stored in the replacement value storage area.
Notes

FUN 143 (s)

•
•
•
•
•
•

If a value other than H01 to H04 is specified for the counter number, DER will be set to “1” and no processing will be
performed.
If the specified counter number is set to a function other than a corresponding external I/O counter (single-phase counter,
two-phase counter), DER will be set to “1”and no processing will be performed.
Since Counter 4 is invalid when a 10-point CPU is used, if Counter 4 is specified, DER will be set to “1” and no processing
will be performed.
If the specified counter number is unable to make an output (PI/O function setting result by R7F5), DER will be set to “1”
and no processing will be performed.
This instruction is only used to rewrite the count value. Other counter settings will not be changed and will not affect the
count operation.
If the range for S exceeds the valid range of the I/O, DER will be set to “1” and no processing will be performed.

Program example
R3

DIF3

LD
AND
[
WR30
WR31
FUN
]

WR30 = H0100
WR31 = 1000
FUN 143 (WR30)

Program description
•

Rewrite the count value of the counter No. 1 to 1000.

5-132

R3
DIF3
= H100
= 1000
143 (WR30)

Chapter 5 Instruction Specifications

Name

FUN instructions-9

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

FUN 144 (s)
Instruction format

X

Y

132

Condition

Steps

—

3

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (counter
number)
Argument
s+1 (Current value storage
area)

Remark

Average Maximum

Number of steps

FUN 144 (s)

Usable I/O

High-speed counter current value reading

Constant

Item number

Other

{

s

{

Function
15
S

8 7
Counter number

S+1

•

0
**

Counter number:
**:

H01 to H04
Disable area

Current value storage area

This function reads the count value of the specified counter number and writes it to the current value storage area.

•
•
•
•
•
•
•

If a value other than H01 to H04 is specified for the counter number, DER will be set to “1” and no processing will be
performed.
If the specified counter number is set to a function other than a corresponding external I/O counter (single-phase counter,
two-phase counter), DER will be set to “1”and no processing will be performed.
Since Counter 4 is invalid when a 10-point CPU is used, if Counter 4 is specified, DER will be set to “1” and no processing
will be performed.
If the specified counter number is unable to make an output (PI/O function setting result by R7F5), DER will be set to “1”
and no processing will be performed.
This instruction is only used to read the count value. Other counter settings will not be changed and it will not affect the
count operation.
The execution of this instruction will not change WRF07A to WRF07D (strobe area) and WRF056 (strobe complete flag).
If the range for S exceeds the valid range of the I/O, DER will be set to “1” and no processing will be performed.

Program example
R4

DIF4

WR41
<
2000

WR40 = H0100
FUN 144 (WR40)
R144

LD
AND
[
WR40
FUN
]

R4
DIF4

LD
OUT

(WR41 < 2000)
R144

Program description
•

Load the count value of the counter No. 1 to WR41.
If the count value of the counter No. 1 is less than 2000, R144 is turned on.

5-133

= H100
144 ( WR40 )

FUN 144 (s)

Notes

Chapter 5 Instruction Specifications

Name

FUN instructions-10

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

Instruction format

X

Y

157

Condition

Steps

—

3

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (counter
number)

Remark

Average Maximum

Number of steps

FUN 145 (s)

s

Processing time (µs)

R7F4
FUN 145 (s)

Usable I/O

High-speed counter current value clear

Constant

Item number

Other

{

Function
15
S
•

87
Counter number

0
**

Counter number:
**:

H01 to H04
Disable area

The output value will be changed according to the output condition (on-preset value, off-preset value settings) if the count
value of the specified counter number is cleared and coincidence output is possible.
Notes

•
•
•
FUN 145 (s)

•
•

If a value other than H01 to H04 is specified for the counter number, DER will be set to “1” and no processing will be
performed.
If the specified counter number is set to a function other than a corresponding external I/O counter (single-phase counter,
two-phase counter), DER will be set to “1” and no processing will be performed.
Since Counter 4 is invalid when a 10-point CPU is used, if Counter 4 is specified, DER will be set to “1” and no processing
will be performed.
If the specified counter number is unable to make an output (PI/O function setting result by R7F5), DER will be set to “1”
and no processing will be performed.
This instruction is used only to clear the count value. Other counter settings will not be changed and it will not affect the
count operation.

Program example
R5

DIF5

LD
AND
[
WR5
FUN
]

WR5 = H0100
FUN 145 (WR5)

Program description
•

The count value of the counter No. 1 is cleared.

5-134

R5
DIF5
= H100
145 ( WR5 )

Chapter 5 Instruction Specifications

Name

FUN instructions-11

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

FUN 146 (s)
Instruction format

Number of steps
Steps

—

3

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (counter
number, preset
specification)
Argument
s+1
(on-preset value)
Argument
s+2
(off-preset value)

Remark

Average Maximum

162

Condition
FUN 146 (s)

Usable I/O

High-speed counter preset

Constant

Item number

Other

{

s

{
{

Function

S

8 7
Counter number

0
Preset specification

S+1

On-preset specification

S+2

Off-preset specification

•
•

Counter number:
Preset specification:

H01 to H04
H00 – Specification of on-preset
value and off-preset value
H01 – Specification of on-preset
value only
H02 – Specification of off-preset
value only

The on-preset value and off-preset value will be set according to the preset specifications for the specified counter number.
The coincidence output value will remain unchanged even when coincidence output is possible.
Notes

•
•
•
•

•
•
•

If a value other than H01 to H04 is specified for the counter number and a value other than H00 to H02 is set for the preset
specification, DER will be set to “1” and no processing will be performed.
Since Counter 4 is invalid when a 10-point CPU is used, if Counter 4 is specified, DER will be set to “1” and no processing
will be performed.
If the specified counter number is set to a function other than a corresponding external I/O counter (single-phase counter,
two-phase counter), DER will be set to “1” and no processing will be performed.
The specified preset value will be checked using the criteria shown below. If an error occurs, DER will be set to “1” and no
processing will be performed.
If there is no error, the bit respective to the setting error detail information WRF057 will be set to “0” and releases the
operation disabled status.
1] When the preset specification is 00H
If S+1 (on-preset) and S+2 (off-preset) values are equal, and error is generated.
2] When the preset specification is 01H
If S+1 (on-preset) and the off-preset value of WRF076 to WRF079 are equal, an error is generated.
3] When the preset specification is 02H
If S+2 (on-preset) and the off-preset value of WRF072 to WRF075 are equal, an error is generated.
This instruction is used only to set the on-preset value and off-preset value. Other counter settings will not be changed and it
will not affect the count operation.
The settings made using the instruction will be reflected in the special internal output (WRF072 to WRF075 and WRF076 to
WRF078). However, it is not reflected if DER becomes equal to “1.”
If the range for S exceeds the valid range of the I/O, DER will be set to “1” and no processing will be performed.

5-135

FUN 146 (s)

15

Chapter 5 Instruction Specifications

Program example
R6

DIF6

LD R6
AND DIF6
[
WR60 = H100
WR61 = 5000
WR62 = 10000
FUN 146 ( WR60 )
]

WR60 = H0100
WR61 = 5000
WR62 = 10000
FUN 146 (WR60)

Program description
•

Sets both the on-preset value and off-preset value in the counter No. 1.
Sets 5000 for the on-preset value and 10000 for the off-preset value.

FUN 146 (s)

5-136

Chapter 5 Instruction Specifications

Name

FUN instructions-12

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

FUN 147 (s)
Instruction format

Number of steps
Steps

—

3

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (PWM output
number)

s

Remark

Average Maximum

135

Condition
FUN 147 (s)

Usable I/O

PWM operation control

Constant

Item number

Other

{

Function
15
S
•

PWM output number

87

0
Operation instruction

PWM output number: H01 to H04
Operation instruction: H00 – Stop,
H01 - Start

Starts/stops the PWM output of the specified PWM output number.

•
•
•
•
•

If a value other than H01 to H04 is specified as the PWM output number, DER will be set to “1” and no processing will be
performed.
If the external I/O corresponding to the PWM output number is set to a function other than PWM output, DER will be set to
“1” and no processing will be performed.
If PWM output is activated with this instruction, the output control flag (R7FC to R7FF) corresponding to the specified
PWM output number will turn on and off.
The PWM output operation does not stop, even when CPU operation is stopped.
When the CPU is not operating, the PWM output continues/stops according to the setting of the special internal output
(output selection at R7DC stop).

Program example
R7

DIF7

LD R7
AND DIF7
[
WR7 = H101
FUN 147 ( WR7 )
]

WR7 = H0101
FUN 147 (WR7)

Program description
•

Prior to starting a PWM output operation, various settings required for the PWM output operation are reflected in the
special internal outputs, and the PI/O function setting flag (R7F5) is turned on while the CPU is being stopped.
For details on the special internal output settings, see Chapter 8.
Starts the PWM output No. 1 (Y100) operation.

5-137

FUN 147 (s)

Notes

Chapter 5 Instruction Specifications

Name

FUN instructions-13

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

FUN 148 (s)
Instruction format

Number of steps
Steps

—

3

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (PWM output
number)
Argument (Frequency
s+1
value)
Argument (On-duty
s+2
value)

Remark

Average Maximum

173

Condition
FUN 148 (s)

Usable I/O

PWM Frequency on-duty changes

Constant

Item number

Other

{

s

{
{

Function
8

15
S

PWM number

S+1
S+2

FUN 148 (s)

•
•
•
•

7

0
**

Frequency values
On-duty value

PWM output number: H01 to H04
**: Disable area
Frequency: 10 to 2000 (Hz)
*: If the frequency value is set to less than 10 Hz, it is
internally changed to 10 Hz. The S parameter is also
rewritten.
On-duty value:
With auto correction – Depends on the frequency used.
Without auto correction – 0 to 100 (%)
Auto correction is executed when the value corresponding to
the CPU model is specified in WRF06B.
Caution: There will be a slight error even if correction setting
is performed

Sets the frequency value and on-duty value of the PWM output number specified by the on-duty value and the specified
frequency value.
Sets the frequency value in Hz.
Example: To set a frequency of 1 kHz, set 1000 (H3B8) as internal output.
Sets the on-duty value in %.
Example: To set an on-duty of 80 %, set 80 (H50) as internal output.
When the on-duty is set to be auto-corrected, the effective range of the on-duty is calculated using the following expressions.
On-duty lower limit value (%) = Hardware delay time (µs) x Frequency used (Hz) x 10-4
On-duty upper limit value (%) = 100 − Hardware delay time (µs) x Frequency used (Hz) x 10-4
If the CPU model is EH-***DRP and the PWM output is 2 kHz,
On-duty lower limit value = 50 x 2000 x 10-4 = 10 %
On-duty upper limit value = 100 − (50 x 2000 x 10-4) = 90 %
Thus, the effective range of the on-duty will be 10 % to 90 %.

5-138

Chapter 5 Instruction Specifications

Notes
•
•
•
•
•
•

If a value other than H01 to H04 is specified as the PWM output number, and if the on-duty value is outside the effective
range, DER will be set to “1” and no processing will be performed.
If the external I/O corresponding to the PWM output number is set to a function other than PWM output, DER will be set to
“1” and no processing will be performed.
The settings made using the instruction will be reflected in the special internal output (WRF072 to WRF075 and WRF076 to
WRF079). However, it is not reflected if DER becomes equal to “1.”
The minimum frequency that can be supported is 10 kHz. If a frequency value smaller than 10 kHz is specified, it will be
changed to 10 kHz internally by the system.
The maximum frequency that can be supported is 2 kHz. Do not set to more than 2 kHz. Operation above 2 kHz is not
guaranteed.
If the range for S exceeds the valid range of the I/O, DER will be set to “1” and no processing will be performed.

Program example
R8

DIF8

LD
AND
[
WR80
WR81
WR82
FUN
]

WR80 = H0100
WR81 = 2000
WR82 = 30
FUN 148 (WR80)

R8
DIF8
= H100
= 2000
= 30
148 ( WR80 )

Program description
Sets both the frequency and on-duty value of the PWM output No. 1 (Y100).
Sets 2000 (Hz) for the frequency and 30 (%) for the on-duty value.

FUN 148 (s)

•

5-139

Chapter 5 Instruction Specifications

Name

FUN instructions-14

Ladder format

Condition code
R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

Instruction format

X

Y

149

Condition

Steps

—

3

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (Pulse output
number)

Remark

Average Maximum

Number of steps

FUN 149 (s)

s

Processing time (µs)

R7F4
FUN 149 (s)

Usable I/O

Pulse output control

Constant

Item number

Other

{

Function
15
S
•

Pulse output number

0
Operation instruction

Pulse output number: H01 to H04
Operation instruction: H00 – Stop,
H01 - Start

Starts pulse output of the specified pulse number and the output is stopped once the specified number of pulses are output.
Notes

•
•
•
FUN 149 (s)

•
•
•
•
•
•
•

If the pulse output number is set to a value other than H01 to H04 and the pulse output number is set to “0,” DER will be set
to “1”and no processing will be performed.
If the external I/O corresponding to the pulse output number is set to a function other than pulse output, DER will be set to
“1”and no processing will be performed.
If the specified counter number is unable to make an output (PI/O function setting result by R7F5), DER will be set to “1”
and no processing will be performed.
The pulse that is output with this instruction will be a pulse having a duty of 30 to 50 %. (To output a pulse having a duty
ratio of 50 %, set the value corresponding to the CPU model in the special internal output WRF06B, by referring to Section
8.1.4.)
When pulse output is commenced with this instruction, the output control flag (R7FC to R7FF) that corresponds to the pulse
output number will turn on while the pulse is output. It will turn off when the specified number of pulses have been output.
When the CPU is not operating, the pulse output continues/stops according to the setting of the special internal output
(output selection at R7DC stop).
This instruction does not have an acceleration/deceleration function.
Only pulse output stop operation can be executed for the I/O that is outputting a pulse with the acceleration/deceleration
function.
If this instruction is executed while the backup memory is being written (R7EF=1), DER will be set to “1” and no
processing will be performed.
The backup memory will not be written during pulse output. Be extremely careful when you change a program during RUN.

Program example
R9

DIF9

LD
AND
[
WR9
FUN
]

WR9 = H0101
FUN 149 (WR9)

R9
DIF9
= H101
149 ( WR9 )

Program description
•

Prior to starting a pulse output operation, various settings required for the pulse output operation are reflected in the special
internal outputs, and the PI/O function setting flag (R7F5) is turned on while the CPU is being stopped.
For more details on the special internal output settings, see Chapter 8.
Starts the pulse output No. 1 (Y100) operation.

5-140

Chapter 5 Instruction Specifications

Name

FUN instructions-15

Ladder format

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

FUN 150 (s)
Instruction format

Number of steps
Steps

—

3

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,



Double word
DR,

WX WY WM TC DX DY DM

Argument (Pulse
number)
Argument (Frequency
s+1
value)
Argument (Number of
s+2
output pulses)

Remark

Average Maximum

217

Condition
FUN 150 (s)

Usable I/O

Pulse frequency output setting changes

Constant

Item number

Other

{

s

{
{

Function

S

0

Pulse output number

Change specification

S+1

Frequency value

S+2

Number of pulse output

Pulse output number:
Change specification:

H01 to H04
H00: Sets the frequency value and
number of pulse output,
H01: Sets the frequency value
only,
H02: Sets the number of pulse
output
Frequency: 10 to 5000 (Hz)
* The maximum frequency of 5000 Hz represents the total of
all pulse output frequencies.
* If the frequency value is set to less than 10 Hz, it is
internally changed to 10 Hz. The S parameter is also
rewritten.
Number of output pulses: H0000 – HFFFF (0 to 65535)
Auto correction is executed when the value corresponding to
the CPU model is specified in WRF06B.
Caution: There will be a slight error even if correction setting
is performed.

•
•
•

Pulse output is commenced at the specified frequency. Output is stopped once the number of pulses specified have been
output.
Sets the frequency value in Hz.
Example: To set a frequency of 3 kHz, set 3000 (HBB8) as internal output.
Sets the count for the number of output pulses.
Example: To set output of 10,000, set 10,000 (H2710) as internal output.

5-141

FUN 150 (s)

15

Chapter 5 Instruction Specifications

Notes
•
•
•
•
•
•
•
•
•

If the pulse output number is set to a value other than H01 to H04, DER will be set to “1”and no processing will be
performed.
If the external I/O corresponding to the pulse output number is set to a function other than pulse output, DER will be set to
“1”and no processing will be performed.
The minimum frequency that can be supported is 10 kHz. If a frequency value smaller than 10 kHz is specified, it will be
changed to 10 kHz internally by the system.
If the specified frequency value is greater than 5 kHz, or even when it is 5 kHz or less, and if the total sum with other set
pulse output frequencies becomes greater than 5 kHz, DER will be set to “1” and no processing will be performed.
If the specified frequency value is 5 kHz or less, and the total sum with other set pulse output frequencies is also 5 kHz or
less, the bit corresponding to the setting error detail WRF057 will be set to “0” and the operation enable state becomes
active.
The settings by this instruction will be reflected in the special internal output (WRF072 to WRF075 and WRF07A to
WRF07D).
If the range for S exceeds the valid range of the I/O, DER will be set to “1” and no processing will be performed.
If the pulse output number is set to “0,” pulse output will not be performed even when the pulse output start (R7FC to R7FF
is set to “1” or FUN149) is set.
If this instruction is executed for the I/O that is outputting a pulse with the acceleration/deceleration function, DER will be
set to “1” and no processing will be performed.

Program example
R10

DIF10

LD
AND
[
WR100
WR101
WR102
FUN
]

WR100 = H0100
WR101 = 219
WR102 = 1000
FUN 150 (WR100)

Program description
•
FUN 150 (s)

Sets both the frequency and pulse output count of the pulse output No. 1 (Y100).
Sets 500 (Hz) for the frequency and 3,000 for the number of pulse outputs.

5-142

R10
DIF10
= H100
= 219
= 1000
150 ( WR100 )

Chapter 5 Instruction Specifications

Item number

Name

FUN instructions-16

Ladder format

Pulse output with acceleration/deceleration
Processing time (µs)

Condition code
R7F4

R7F3

R7F2

R7F1

R7F0

DER

ERR

SD

V

C

↕

z

z

z

z

FUN 151 (s)
Instruction format

Number of steps
Condition

Remark

Average Maximum



919
Steps

Bit

Word
Double word
TD, SS,
R, WDT, MS,
WR,
DR,
L, TMR, CU,
M RCU, CT WX WY WM TC DX DY DM
{

Usable I/O
X
s

Y

Pulse output No.

Total No. of output
pulses
Maximum frequency
s+2
(Hz)
s+3 Initial frequency (Hz)

Other

{

s+1

s+4

Constant

FUN 151 (s)

{
{

Acceleration/deceleration
time (ms)

{

Function

s

8 7

0

Pulse output No.

**

s+1

Total No. of output pulses N

s+2

Maximum frequency F (Hz)

s+3

Initial frequency F0 (Hz)

s+4

Acceleration/deceleration time T (ms)

Pulse output No.:
**:
Total No. of output pulses:
Maximum frequency (Hz):
Initial frequency (Hz):
Acceleration/deceleration time (ms):

H01 to H04
Invalid area
H0000 to HFFFF (0 to 65535)
HA to H1388 (10 to 5000)
HA to H1388 (10 to 5000)
H0000 to HFFFF (0 to 65535)

This instruction outputs pulses with the acceleration/deceleration function.
It outputs pulses from the pulse output terminal set with the pulse output number s until the total number of output pulses set
with s+1 is reached.
Since the output of pulses starts from the one having the frequency set with s+3, set the parameters so that the stepping motor
and other devices will not become out of tune.
Acceleration is performed at the acceleration time set with s+4 in 10 steps until the maximum frequency set with s+2 is reached.
Deceleration is performed at the deceleration time set with s+4 until the total number of output pulses set with s+1 is reached.
The ratio of frequency change for the deceleration is the same as for the acceleration.
Pulse frequency (Hz)
F:S+2
T / 10

9

1

8

2

7

3

6

(F-F0) / 10

4

5

5

4

6

3

7

2
F0:S+3

8

1

9

0

10
Time (sec)
Deceleration time

Acceleration time
T:S+4

T:S+4

5-143

FUN 151 (s)

15

Chapter 5 Instruction Specifications

Notes
When this instruction is executed, the maximum frequency is stored in the special internal output’s pulse output frequency
(WRF072 to WFR075), and the number of output pulses is stored in the special internal output’s number of output pulses
(WRF07A to WRF07D) respectively.
This instruction will not be executed if the specified pulse output is generating pulse output.
If the output that corresponds to the specified pulse output number has not been set for pulse output, DER will be set to “1” and
pulse output will not be generated.
If the total of the frequency set with this instruction and the frequency set for another pulse output exceeds 5 kHz, DER will be
set to “1” and pulse output will not be generated.
If the maximum frequency is larger than the initial frequency, DER will be set to “1” and pulse output will not be generated.
If the same value is specified for the maximum frequency and initial frequency, pulses will be output for the number of pulses
set with the maximum cycle without acceleration/deceleration.
If the maximum frequency and initial frequency are set to a value smaller than 10 Hz, the specified values will be changed to 10
Hz by the system.
If the total number of output pulses is small, deceleration will be performed without accelerating up to the maximum frequency.
In this case, the specified acceleration/deceleration time will not be used as the acceleration/deceleration time; it will be
accelerated (or decelerated) for each pulse.
For the acceleration/deceleration time, set a value equal to or larger than (1 / maximum frequency + 1 / initial frequency) x 5. If
an acceleration/deceleration time smaller than this value is specified, the specified acceleration/deceleration will not be set.
Acceleration and deceleration are performed in 10 steps, and at least one or more pulses are always output. Thus, if a small
initial frequency value is specified, an error in the acceleration/deceleration time will become large.
Pulse frequency (Hz)

Pulse frequency (Hz)

F:S+2

F:S+2

Equivalent to one pulse
Equivalent to one pulse

(F-F0) / 10
(F-F0) / 10

F0:S+3

F0:S+3

0

0

Time (sec)
FUN 151 (s)

Specified acceleration time
T:S+4

Specified acceleration time
T:S+4
Actual acceleration time

•
•

Specified deceleration time set
T:S+4
Actual deceleration time

Pulse output at abnormal setting
If this instruction is executed while the backup memory is being written (R7EF=1), DER will be set to “1” and no
processing will be performed.
The backup memory will not be written during pulse output. Be extremely careful when you change a program during RUN.

Program example
R7E3
WR0100 = H0200
WR0101 = H1000
WR0102 = 1000
WR0103 = 500
WR0104 = 300
X00001 DIF0

FUN 151(WR0100)

LD
R7E3
[
WR0100 = H0200
WR0101 = H1000
WR0102 = 1000
WR0103 = 500
WR0104 = 300
]
LD
X00001
AND
DIF0
[
FUN 151 (WR0100)
]

Program description
Sets the required parameters in the special internal outputs at the first scan after RUN start.
At the leading edge of X00001, pulses are output starting from Y101 using the following settings: acceleration/deceleration time
of 300 (Hz), initial frequency of 500 (Hz), maximum frequency of 1000 (Hz), and number of output pulses of 4,096 pulses.

5-144

Chapter 5 Instruction Specifications

Item number

Name

FUN instructions-17

Ladder format

BOX comment

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

FUN 254 (s)

DER

ERR

SD

V

C

* (BOXC (s) )

z

z

z

z

z

Instruction format



Number of steps
Condition

Remark

Average Maximum



Steps

FUN 254 (s)

3

Usable I/O

X

Bit
R,

TD, SS,

M

CU, CT

Y

Word
WR,

WX WY WM TC DX DY DM

Argument (dummy
constant)

s

Double word
DR,

Constant

* (BOXC (s) )

Other

{

Function

•
*

This instruction does not perform any operations. It is used to print comments on the right side of the calculation box in
conjunction with the Ladder Editor.
A comment can contain a maximum of 32 characters.
( ) indicates the display when the Ladder Editor is used.

Item number

Name

FUN instructions-18

Ladder format

Memo comment

Condition code

Processing time (µs)

R7F4

R7F3

R7F2

R7F1

R7F0

FUN 255 (s)

DER

ERR

SD

V

C

* (MEMC (s) )

z

z

z

z

z

Instruction format

Condition

Average Maximum



Number of steps

Remark
FUN 254 (s)
FUN 255 (s)

•



Steps

FUN 255 (s)

3

Usable I/O

X

Y

Bit
R,

TD, SS,

M

CU, CT

Word
WR,

WX WY WM TC DX DY DM

Argument (dummy
constant)

s

Double word
DR,

Constant

* (MEMC (s) )

Other

{

Function
•
•
*

This instruction does not perform any operations. It is used to print comments on the right side of the calculation box in
conjunction with the Ladder Editor.
A comment can contain a maximum of one screen (66 characters × 16 lines).
( ) indicates the display when the Ladder Editor is used.

5-145

Chapter 5 Instruction Specifications

5-146

Chapter 6 I/O Specifications

Chapter 6

I/O Specifications

Table 6.1 lists the input/output classifications and input/output point types that can be used with the MICRO-EH

Internal I/O

2

Others

3

Analog input
Analog output
Counter input
Interrupt input
Counter
output
Pulse/PWM
output
Bit

10/16

External I/O

External I/O*

1

Size

Function

Symbol

Item

Table 6.1 Usable I/O classifications and point types

X
WX
DX
Y
WY
DY
WX
WY
X
X
Y

B
W
D
B
W
D
W
W
B
B
B

10
16
16
10
16
16
16
16
10
10
10

Y

B

10

B
B
W
D
W
D
B
W
D
B
B
B
B
B

16
16
16
16
16
16
16
16
16
10
10
10
10
10

Bit external input
Word external input
Double-word external input
Bit external output
Word external output
Double-word external output
Analog input
Analog output
High-speed counter input
Interrupt input
High-speed counter synchronized
output
Pulse output
PWM output
Bit internal output
Bit special internal output
Word internal output
Double-word internal output
Word special internal output
D.-word special internal output
Bit internal output
Word internal output
Double-word internal output
Rising edge
Falling edge
Master control set
Master control reset
On delay timer

SS

B

10

Single-shot timer

CU

B

10

Up counter

CTU

B

10

Up-down counter up input

CTD

B

10

Up-down counter down input

CL

B

10

Clear progress value

R
R
Word
WR
DR
WR
DR
Sharing of
M
bit / word
WM
DM
Edge detection DIF
DFN
Master control MCS
MCR
Timer counter
TD

Name

10-point
type
Number of
points

14-point
type
Number of
points

23-point
type
Number of
points

28-point
type
Number of
points

6 points
1 word

8 points
1 word

13 points
1 word

16 points
2 words

4 points
1 word

6 points
1 word

10 points
1 word

12 points
1 word

3 points
total
3 points

4 points
total
4 points

2 words
1 word
4 points
total
4 points

4 points
total
4 points

3 point

4 points

4 point

4 points

1984 points
64 points
4096 words
512 words
16384 points
1024 words
512 points
512 points
50 points
Timer 256 points (0.01 s timer has only 0 to 63)
Counter 256 points (The same area as the timer is used.)
(The same timer counter number cannot be used more
than once.)

*: The external I/O, counter I/O, interrupt input, pulse/PWM outputs use the same area by specifying the operation I/O
operation mode (WRF070). See Chapter 8 for further information.
Note: The MICRO-EH does not support CPU link area (L/WL).
Note: B and W in the Size column represent bit and word (16 bits), respectively.

6-1

Chapter 6 I/O Specifications

6.1

I/O Assignment
I/O assignment and I/O address are listed below.

Table 6.2 I/O assignment and I/O address
Type

I/O assignment

Digital
Basic
Analog

10-point

14-point

23-point

28-point

type

type

type

type

Slot 0 : X48

X0-5

X0-7

X0-12

X0-15

Slot 1 : Y32

Y100-103

Y100-105

Y100-109

Y100-111

Slot 2 : Empty

-

-

Slot 3 : X4W

-

-

WX30-31

-

Slot 4 : Y4W

-

-

WY40

-

Digital

Unit 1 / Slot 0 : B1/1

Analog

Unit 1 / Slot 0 : FUN0

Digital

Unit 2 / Slot 0 : B1/1

Analog

Unit 2 / Slot 0 : FUN0

Digital

Unit 3 / Slot 0 : B1/1

Analog

Unit 3 / Slot 0 : FUN0

Digital

Unit 4 / Slot 0 : B1/1

Analog

Unit 4 / Slot 0 : FUN0

Exp.1

Exp.2

Exp.3

Exp.4

-

-

-

X1000-1007 / 1015 (14 / 28 pts.)

-

Y1016-1021 / 1027 (14 / 28 pts.)

-

WX101-104 (WX100 is for command function under development)

-

WY106-107 (WY105 is for command function under development)

-

X2000-2007 / 2015 (14 / 28 pts.)

-

Y2016-2021 / 2027 (14 / 28 pts.)

-

WX201-204 (WX200 is for command function under development)

-

WY206-207 (WY205 is for command function under development)

-

X3000-3007 / 3015 (14 / 28 pts.)

-

Y3016-3021 / 3027 (14 / 28 pts.)

-

WX301-304 (WX300 is for command function under development)

-

WY306-307 (WY305 is for command function under development)

-

X4000-4007 / 4015 (14 / 28 pts.)

-

Y4016-4021 / 4027 (14 / 28 pts.)

-

WX401-404 (WX400 is for command function under development)

-

WY406-407 (WY405 is for command function under development)

6-2

Chapter 6 I/O Specifications

6.2

External I/O Numbers
When starting an operation of the MICRO-EH, a user program is executed (scanned) after the input refresh processing
(receiving external input data) is performed. Operations are performed according to the contents of the user program, and
the next input refresh processing and output refresh processing (operation results are reflected in the external output) are
performed. After that, the next user program is executed (scanned). This series of operations is continually repeated until
the operation is stopped or until a problem occurs in which the operation can no longer continue.
When the operation is stopped or if a problem interrupting the operation occurs, the CPU performs output refresh
processing making all output data as off data and then stops the operation, regardless of the execution status of the user
program.
Figure 6.1 shows a diagram outlining this series of operations.
Input refresh processing

Input refresh processing

Output refresh processing
Time

RUN start
Execute (scan) user program

System processing

Output refresh processing (off data)
Time

RUN stop
Execute (scan) user program

Figure 6.1 Overview of user program execution and refresh processing
The user programs are executed in sequence, normally beginning with the program in the beginning of the scan area till
the last program, or until the END instruction. Then, I/O data is refreshed prior to the execution of the next user program.
As shown above, external I/O data is updated in batch mode in the refresh processing after the user program is executed.
If it is necessary to update (refresh) the I/O data while the user program is being executed, use the refresh instruction.
When designing a system, take into account the above refresh operation from when the input data is received and
operated until output data is obtained.

6-3

Chapter 6 I/O Specifications

The following explains the external I/O assignment. The external I/O numbers for the MICRO-EH system are expressed
with the following conventions.

Classification
X
WX
DX
Y
WY
DY

Table 6.6 List of external I/O classification and data type
I/O classification
Data type
Remarks
External input
Bit type
Corresponds to the signal of each terminal block.
Word type (16-bit)
Data in the range 0 to 15 is batch processed.
16-bit synchronicity guaranteed.
Double-word type (32-bit) Two word data are batch expressed.
Lower 16-bit and upper 16-bit synchronicity are
not guaranteed.
External output
Bit type
Corresponds to the signal of each terminal block.
Word type (16-bit)
Data in the range 0 to 15 is batch processed.
16-bit synchronicity guaranteed.
Double-word type (32-bit) Two word data are expressed as one batch.
Lower 16-bit and upper 16-bit synchronicity are
not guaranteed.

Table 6.7 List of I/O number conventions for external I/O
Numbering convention

Data type
Bit type (basic)
X

Input
Output
Bit number
Slot number (X:0
Unit number (0)

Y

Bit type
(expansion)

EH-A23DRP
X0～X12, WX30,WX31
Y:1)

Y100～Y109, WY40
X

Input
Output
Bit number
(X:00-07/15 Y:16-21/27)
Slot number (0)
Unit number (1-4)

Y

Word type
(basic/expansion)

Example

EH-A28EDR
X1000～X1015

Y1016～Y1021
WX

EH-A6EAN (Analog exp.)

WY

WX201～WX204
Word number
Slot number
Unit number (1-4)

WY206, WY207

6-4

Chapter 6 I/O Specifications

6.3

Internal Output Numbers
Memory is available as an internal output area in the CPU module. There are three areas: bit dedicated area (R), word
dedicated area (WR), and bit/word shared area (M/WM).
Table 6.8 List of I/O number conventions for external I/O
Numbering convention

Data type
Bit-dedicated
type

Example
R0
R105
R23C
R7E7

R
Normal area H000 to H7BF
Special area H7C0 to H7FF
Both are expressed as hexadecimals.

Word dedicated
type



WR0
WR11
WR123
WRF004

WR
Normal area H0000 to
Special area HF000 to
Both are expressed as hexadecimals.



DR0
DR11
DR123
DRF004

DR
Normal area H0000 to
Special area HF000 to
Both are expressed as hexadecimals.
Expresses WR for 2 words in continuation.

Bit/word shared
type



M



WM

H0000~

M0
M11
M123

H000~

WM0
WM11
WM123

...........

M120F

M1200

WM120



DM0
DM11
DM234

DM
H0000 to
Expresses as hexadecimals.
Expresses DM for 2 words in continuation.

•

Internal outputs R, WR and DR are completely separate areas. Bit-based operations cannot be performed in the WR.
(Example) Relationships among R100, WR10, and DR10
R area

R100

WR/DR area

Another area

WR10

WR11
DR10
DR11

•

Because internal outputs M, WM and DM share the same area, bit-based operations are allowed.
(Example) Relationships among M100, WM10, and DM10
M11F

.......

M110

M10F

WM11

M10A
M109

WM10
DM10

DM11

6-5

.......

M100

Chapter 7 Programming

Chapter 7
7.1

Programming

Memory Size and Memory Assignment
Table 7.1. Lists the programming specifications for the MICRO-EH.

Table 7.1 Programming specifications
10/14-point type
23/28-point type
Program size
3 k steps (3072 steps)
Instruction size
32 bits/1 step
Memory specification SRAM
Backup with a battery is not possible
Backup is possible by installing the
since a battery cannot be installed.
battery.
FLASH
Backup using flash memory is possible.
4
Programming language
H-series ladder/instruction language
5
Program creation
Created with H-series programming devices
6
Program modification During STOP Can be done as desired from the programming devices.
During RUN Can be done using the modify during RUN operation (except control instructions).
Control instructions can be changed with special operations. *1
(When a change is made during RUN, control operation stops while the program
is being modified.).
7
Program protection
Programs can only be modified when write is enabled. (The enable status is
automatically controlled by the programming device).
8
Password
A password can be set from the programming device (the program cannot be
displayed when setting the password. The programs can be downloaded to the
programming device).
9
Check function
A sum check function for the program is always executing. An address check with
the I/O assignment table is executed when RUN operation starts.
10 Program name
The program names are set from the programming device and stored along with
the programs.
*1: Refer to the peripheral unit manual for details.
Notes:
• Comment data that has been created with the peripheral unit is not stored in the CPU.
• Save the user programs to a floppy disk or other media for backup.
• If a program exceeding 3072 steps is created by setting 4 K steps in the LADDER EDITOR, no error occurs in the LADDER
EDITOR, but a “writing outside memory range” error will occur when writing the program to the CPU.
• Unlike the conventional H series, the MICRO-EH series backup user programs in the FLASH memory.
In order to shorten the program transfer time, the user programs are transferred once to the operation execution memory, at which
point the transfer is completed. The backup to the FLASH memory is performed afterward; therefore, be sure to turn off the
power to the main unit after approximately two minutes have passed since the program transfer. If the power is turned off within
two minutes, a user memory error (31H) may occur. Note that the transfer completion to the FLASH memory can be confirmed
by the special internal output (R7EF).
No.
1
2
3

Item

7-1

Chapter 7 Programming

7.2

Programming Devices
The following methods are used to create the user programs.

No.
1

2

Table 7.2 Programming methods
Programming device used
Concept of operation
Remarks
Personal computer software [For off-line/on-line operation]
• I/O assignment information
(LADDER EDITOR, etc.)
Creates an I/O assignment table, inputs the program to be
can be read.
created, and transfers the program to the CPU in online
• Initialize the CPU when
mode.
starting up for the first time
[For direct operation]
after the unit is unpacked or
As each program is entered one by one, it is directly
when a battery error occurs.
written to the CPU.
Change operation can be performed during RUN
operation.
Note: This mode is not available for Windows
version.
[During on-direct operation]
When programs are input one by one, the input programs
are written into the CPU’s memory and personal
computer’s memory.
Change operation can be performed during RUN
operation.
Note: To enter the on-direct mode, match the contents in
the CPU’s memory and personal computer’s
memory.
Dedicated programming
[For off-line/on-line operation]
console (GPCL01H, etc.)
Creates an I/O assignment table, inputs the program to be
created, and transfers the program to the CPU in online
mode.
[For direct operation]
As each program is entered one by one, it is directly
written to the CPU.
Change operation can be performed during RUN
operation.
Note: This mode is not available for Windows
version.
[During on-direct operation]
On-direct operation cannot be performed.
Portable graphic programmers and instruction language programmers can not be used.

7-2

Chapter 7 Programming

7.3

Programming Methods
The following shows the system configuration using a personal computer and the procedures for creating a user program
using personal computer software. Please note that cables differ depending on the personal computer and software used.
Table 7.3 System configuration using a personal computer

Personal computer
No.
software used
1 LADDER EDITOR
(Windows version)

DOS/V PC

PC9800 series personal computer

Install

Install
LADDER EDITOR for
Windows (HLW-PC3,
(Windows 95/98/NT) HLW-PC3E) system disks
(Japanese, English)
DOS/V PC

CPU setting
Memory assignment
Cable (MICRO-EH side)
Cable
(personal computer side)
10-point type

14/23/28-point type

10/14-point type
Port 2
2

23/28-point type

LADDER EDITOR for
Windows® (HLW-PC3)
system disks (Japanese)

Specify H-302.
Specify RAM-04H (4 K memory).
EH-VCB02
EH-RS05

EH-RS05
WVCB02H

WPCB02H

There are no DIP switches (fixed to 4800 bps).
DIP SW

Port 1
*1, *2

PC9800 series PC
(Windows® 95/98/NT)

Status

1
ON
ON
OFF
OFF

2
3
4
OFF ON OFF 38.4 kbps
OFF OFF OFF 19.2 kbps
OFF ON OFF 9600 bps
OFF OFF OFF 4800 bps

Same as left

Port 2 does not exist.
Cannot be connected with the above configuration since the RS-422/485 are used (RS232C/422 converters are required.)
Set the transmission speed in the special internal output (WRF03D).

LADDER EDITOR
(DOS version)

Install

Install

DOS/V PC
(MS-DOS®)

LADDER EDITOR DOS
version (HL-AT3E)
system disks (English)

PC9800 series
PC (MS-DOS®)

LADDER EDITOR
DOS version (HL-PC3)
system disks (Japanese)

CPU setting
Specify H-302.
Memory assignment
Specify RAM-04H (4 k memory).
Cable (MICRO-EH side)
EH-RS05
EH-VCB02
Cable
PCCB02H
(personal computer side)
10-point type
There are no DIP switches (fixed to 4800 bps).
Port 1
DIPSW
1
2
3
4
*1, *2 14/23/28-point type
Same as left
Status

OFF OFF OFF OFF 4800 bps

10/14-point type

Port 2 does not exist.
Cannot be connected with the above configuration since the RS-422/485 are used (RSPort 2
23/28-point type
232C/422 converters are required.)
Set the transmission speed in the special internal output (WRF03D).
*1: Settings of the port 1 can be changed when the DR signal is off. When the DR signal is on, the setting is fixed.
*2: Set the port 1 to the transmission control procedure 1 by the special internal output (WRF01A). (The default is the transmission
control procedure 1.)
Note: Refer to the manual of the applicable software on how to install and operate each software (LADDER EDITOR).
7-3

Chapter 7 Programming

Item

Create new program
Off-line
Start

Start
Select off-line

Select off-line

Out-line of opera-ting procedure

Initialize PLC
CPU type: Specify H-302
Memory type: Specify RAM-04H

Create I/O assignment
Create program

Program check

NG

Situation

Start

Select on-line

Select on-line

Regenerate from FD, etc.

Regenerate from FD, etc.

When utilizing a program created
in another H-series
CPU type: Specify H302
Memory type: Specify RAM-04H

Initialize the CPU when
running it for the first
time(right after purchase, etc.)

Modify I/O assignment
Modify program

Program check

NG

Transfer program
(CPU → PLC)
Select on-direct
Conduct test operation

Transfer program
(PLC → CPU)

*1

NG

OK
Conduct test operation

Modify program (modify
during RUN, etc.)

Operation
check
OK

NG

OK

OK

OK

End

Point

Start

CPU error check

Save in FD, etc.

*1:

Table 7.4 List of procedures for creating a program
Modify
Test operation, adjustment
Off-line
On-line
On-direct

Operation
check
OK

Change the name and
save in FD, etc.

OK

NG

To modification

Enter in FD, etc.
End

End

End

When creating a new
program

When modifying a program

When transferring a created
program to the CPU for the
first time

When modifying a program
during test operation

A program can be created
without executing MICROEH.

When using a program that
was used in another H-series,
specify H-302 as the CPU
type.

When performing CPU error
check, make sure the I/O
assignment matches the
loaded module. (The loading
read function can be used to
match them forcibly.)

To enter the on-direct mode,
match the contents in the
CPU’s memory and personal
computer’s memory. The
modified contents will be
reflected in both the
computer memory and CPU
memory.

Set the flow size to 0 for memory assignment.
If a program transfer is performed by specifying the flow size, the message “Cannot execute: Operation error” is displayed, and
a peripheral unit remain as WRITE occupied. In this case, either cancel the occupy state from LADDER EDITOR of the
peripheral unit or by re-entering the CPU power.

7-4

Chapter 7 Programming

The user program is managed in circuit units. One circuit can describe nine contact points (a-type contact point or b-type
contact point) and seven coils as shown in the figure below.

Figure 7.1 Size of one circuit
Or, one relational box can be described using the width of three contact points. The relational box can be considered as an
a-type contact point that turns on when the conditions in the box are established (Figure 7.2).

Figure 7.2 Example when using a relational box

7-5

Chapter 7 Programming

In addition, if loop symbols are used, a circuit containing up to 57 contact points and one coil can be entered within seven
lines.
However, an OR circuit cannot be input after a loop.
*

*

*

*

*

*

*

*

*

*

*

*
Figure 7.3 Example when using loop symbols
A processing box can be placed at the coil position. The processing instructions, application instructions, control
instructions, transfer instruction and fun instructions can be described in a processing box. A maximum of 19 instructions
can be described in one processing box. The processing box is executed when the conditions in the contact section to be
connected directly in advance is established. The processing box is not executed if the condition is not established.
See the chapter on the “Instruction Specifications” for details on each instruction.

WR0 = WR0 + WR1
WR1 = WR1 * 3
WR2 = WR2 / 4
WR0 = WX0 AND HFF00
.
.
.
.
.
.
.
Up to a maximum of 19 lines
.
.
.
.
.
.
.
.
.

A maximum of 4 lines can be described

Figure 7.4 Example when using a processing box
Note: For the LADDER EDITOR for Windows, a processing box can be displayed in one contact point width, so a circuit of nine
contact points and one processing box can be entered.
For more details, refer to the user's manual for the LADDER EDITOR for Windows.

7-6

Chapter 7 Programming

7.4

Program Transfer
The MICRO-EH stores the user programs written from the peripheral units in the execution memory (RAM). Then, it
transfers the user programs to the FLASH memory (backup memory) utilizing the idle time of the MPU in the internal
area of the MICRO-EH. This is performed regardless of operation status of the CPU. Therefore, the programs may not be
written into the backup memory (FLASH memory) even though the peripheral units display that program transfer has
been completed. If the power is turned off before the programs are written to the FLASH memory, the customer’s
programs may be lost.
In order to prevent such crisis, it is necessary to monitor the Backup Memory Writing Progress Flag (R7EF) after the
programs are transferred. When this bit special internal output is ON, it indicates that the data (programs, etc.) are being
transferred to the backup memory. When is it OFF, it indicates that the data is not being written to the backup memory.
Turning off the power after making sure that the Backup Memory Writing Progress Flag (R7EF) turns off after the
program is transferred from the peripheral unit to the MICRO-EH will ensure that the program is backed up properly.
(The transfer to the backup memory takes approximately two minutes.)
If a new program is written from a peripheral unit while a user program is being transferred to the backup memory
(FLASH memory), the user program transfer to the backup memory will be stopped and the new program will be
transferred to the backup memory. Therefore, the program that is stored in the backup memory will be the program that is
written last.
In addition to the user programs, the settings to be stored in the special internal outputs can be transferred to the backup
memory. The transfer of the special internal outputs for various settings (Note 1) can be executed by turning ON the
Memory Request for Various Settings Flag (R7F6). As with the transfer of the user programs, the Backup Memory
Writing Progress Flag (R7EF) will be turned ON during this transfer.
Figure 7.5 below shows the operation of the Backup Memory Writing Progress Flag (R7EF) during the backup of the
special internal output for various settings and the backup of the user programs. Note that when one is being transferred,
the next transfer will not start until the current transfer is complete.

Backup memory writing
R7EF
progress flag
Special internal output
write request for various R7F6
settings
1]

3]
2]

6]
4], 5]

When there is no conflict
between the user program
write and the setting memory
request of the special internal
output

1]
2]
3]
4]
5]
6]

4], 5]
1]

6]

3]
2]

When a setting memory
request of the special internal
output is generated during the
transfer of the user program

1]

4]
2]

5]

6]

3]

When a user program write
is generated during the
transfer of the special
internal output

R7F6 ON due to forced set or reset
Special internal output transfer start for various settings
Special internal output transfer end for various settings
Write from the peripheral unit is complete.
User program transfer start
User program transfer end
Figure 7.5 Operation of the bit special internal output when backup memory is being accessed

Note:
• The backup memory cannot be written during pulse output. If a program is changed during RUN with respect to the CPU
during pulse output, turn off the power supply approximately two minutes after pulse output stops.
• Pulses cannot be output while the backup memory is being written. Commence pulse output once again after the Backup
Memory Writing Progress Flag turns off.

7-7

Chapter 7 Programming

Note 1) The following lists the special internal outputs for various settings that can be transferred to the backup memory by the
Memory Request for Various Settings Flag (R7F6).

1

Table 7.5 List of special internal outputs that can be stored
Special internal output
Function
that can be stored
WRF01A
Dedicated port 1
Communication settings

2

WRF03C

Dedicated port 1

Modem timeout time

3

WRF03D

Dedicated port 2

Communication settings

No.

4

WRF06B

Pulse/PWM automatic correction settings

5

WRF06C

Potentiometer 1

Filtering time

6

WRF06D

Potentiometer 2

Filtering time

7

WRF06E

Analog input type selection

8

WRF06F

Phase counting mode

9

WRF070

I/O operation mode

10

WRF071

I/O detailed function settings
Output frequency
On-preset value

11

WRF072

12

WRF073

13

WRF074

14

WRF075

15

WRF076

16

WRF077

17

WRF078

18

WRF079

19

WRF07A

20

WRF07B

21

WRF07C

22

WRF07D

23

WRF07E

Input edge

24

WRF07F

Input filtering time

On-duty value
Off-preset value

Pre-load value
Pulse output value

7-8

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

Chapter 8

High-speed counter, PWM / Pulse train
output and Analogue I/O

The MICRO-EH operates in four operation modes. By selecting the proper operation mode, input/output points can be assigned to
the counter input, interrupt input, pulse output, and PWM output functions, instead of the normal input/output function.
The 14-point type model or higher are equipped with two potentiometers. The values of internal outputs can be changed externally
using these potentiometers, without peripheral units.
The 23-point type model is equipped with two points of analogue input and one point of analogue output.
This chapter explains how to set various functions mentioned above, together with simple usage examples.

8.1

Input/Output Function
The normal input/output points can not only be used as they are, but can also be assigned special functions. In order to
assign these special functions, it is necessary to select the right operation mode; the following briefly explains the
procedure for selecting the operation modes. Refer to the section corresponding to each item for the details.

8.1.1

Initial Setting for Special Input/Output Function

Figure 8.1 shows a flowchart for the setting procedures.
First, select an operation mode. There are 5 operation modes, mode 0 to 3 and 10. By selecting an operation mode the
input number to be used for high-speed counter input and the type of counter is determined, along with the output number
for the corresponding output.
Next, the desired input/output function for each point of input/output should be selected, because the function assigned to
input/output varies depending on the operation mode selected.
Lastly, set the operating conditions for each input/output function selected.
Furthermore, performing the settings mentioned above does not in itself make the settings valid for the actual operation.
The settings become valid only after turning on the special internal output for individual setting (R7F5). After making the
settings valid, it is possible to make changes for each function using the special internal output for individual setting.
Turning the special internal output (R7F6) on also stores the settings performed above in the FLASH memory. From the
next time the power supply is turned on, the settings stored in the FLASH memory are automatically read; it is not
necessary to perform the settings every time.
Set the number 0 to 3 corresponding to the mode you want to set in WRF070.
Refer to Table 8.1 for the details of each mode.

1] Set the operation mode

Note 1)
Note 2)
Note 3)

If nothing is set, the settings stored in the FLASH memory become valid.
If a number larger than 4 is set, mode 0 will be selected.
After the settings are stored in the FLASH memory, it is not necessary to perform the settings
after step 1] from the next time.

Set the function of each input/output terminal in WRF071.
Refer to the section about detailed function settings for the details.

2] Set input/output terminal

Note 4)

3] Set the operating conditions
for each function

If nothing is set, the initial value will become 0.

Set the operating conditions for each function in WRF072 to WRF07E.
Refer to the section about detailed operating condition settings for the details.
Note 5)

If nothing is set, the initial value will become 0.

The settings performed in steps 1] to 3] become valid by turning R7F5 on.
Note 6)

4] Make the settings valid
5] Change
individual setting
6] Store the settings in the memory.

The settings performed in steps 1] to 3] do not become valid unless R7F5 is turned on while
output is turned off.
Moreover, if R7F5 is turned on while the CPU is running, the settings do not become valid
even though R7F5 is turned on. The settings become valid at the point when the CPU is
stopped.

The settings performed in steps 1] to 3] are stored in the FLASH memory by turning R7F6
on.
It is not necessary to perform the settings again when the power supply is turned on for the
next time.
Note 7)
Note 8)
Note 9)

If R7F6 is not turned on, the settings will be changed to the ones stored in the FLASH
memory when the power supply is turned on for the next time (if nothing is stored in the
FLASH memory, the initial values will be set).
When the CPU is operating, the settings are not stored in the FLASH memory by turning
R7F6 on.
R7EF turns on while the settings are transferred to the FLASH memory. If the power supply
to the main unit is turned off while R7EF is on, the settings are not properly stored in the
FLASH memory; there is a possibility that the parameter settings are initialized when the
power supply is turned on for the next time.

Figure 8.1 Flow of operation mode setting procedure
8-1

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.1.2

Operation Mode

Select one mode from the 5 modes shown in Table 8.1 (mode 10 described in following pages.) and set the mode number
in the special internal output WRF070 when the CPU is in STOP status.
*1:
*2:

If parameter in WRF070 is not saved by R7F6, the value will be 0 at the next power on.
The operation mode setting can be changed only when CPU is in STOP status.

Each input and output terminal setting is configured in WRF071.
Mode 0
Standard
X0
X1
X2
X3
X4
X5
X6
X7

Y100

Standard input
Standard input
Interrupt input 1
Standard input
Standard input
Interrupt input 2
Standard input
Standard input
Interrupt input 3
Standard input *3
Standard input *3
Interrupt input 4 *3
Standard output
PWM output 1
Pulse output 1
Standard output
PWM output 2 *5
Pulse output 2 *5
Standard output
PWM output 3 *5
Pulse output 3 *5
Standard output

Table 8.1 Operation mode list
Mode 1
Mode 2
Single-phase counter ×2

Single-phase counter ×4

Counter input 1
Counter preload 1
Counter strobe 1
Standard input *6
Counter input 2
Counter preload 2
Counter strobe 2
Standard input *6
Standard input
Standard input
Interrupt input 3
Standard input *6
Standard input *3
Standard input *3
Interrupt input 4 *3
Standard input *6
Counter output 1
Standard output *6

Counter input 1
Counter preload 1
Counter strobe 1
Standard input *6
Counter input 2
Counter preload 2
Counter strobe 2
Standard input *6
Counter input 3
Counter preload 3
Counter strobe 3
Standard input *6
Counter input 4 *3
Counter preload 4 *3
Counter strobe 4 *3
Standard input *6
Counter output 1
Standard output *6

Counter output 2
Standard output *6

Counter output 2
Standard output *6

Mode 3
2-phase counter ×1,
Single-phase counter ×1
Counter input 1A
Counter preload 1
Counter strobe 1
Standard input *6
Counter input 1B
Counter input (marker) 1Z

Standard input
Standard input
Interrupt input 3
Counter input 4 *3
Counter preload 4 *3
Counter strobe 4 *3
Standard input *6
Counter output 1
Standard output *6

Standard output
PWM output 2 *5
Pulse output 2 *5
Standard output
Counter output 3
Standard output
Y102
PWM output 3 *5
Standard output *6
PWM output 3 *5
Pulse output 3 *5
Pulse output 3 *5
Standard output
Counter
Standard
Counter
Standard
output 4 *4
output
output 4 *4
output
Y103
PWM output 4 *5
PWM output 4 *5
Std. output *6 PWM out 4 *5 Std. output *6 PWM out 4 *5
Pulse output 4 *5
Pulse out 4 *5
Pulse out 4 *5
Pulse output 4 *5
*3: Modes 0 to 3 can be set regardless of the type of CPU however, note that the 10-point type does not have X6
and X7.
*4: It is only possible to select either Standard output, PWM output, or pulse output for the 10- point type CPU. (A
counter corresponding output cannot be set because there is no counter input that can correspond to it.)
*5: It is possible to set for the relay output type, but the expected output waveform cannot be obtained. Moreover,
care must be taken because it may cause an relay error.
*6: This assignment is supported by Ver.1.11 (WRF051=H0111) or newer.
Y101

8-2

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.1.3

Input/Output Setting

Configure each I/O setting in the special internal output (WRF071) and make it effective by setting R7F5 ON in CPU
STOP status. This information is normally reset at every power on, but this can be saved in the FLASH memory by
setting R7F5 ON after that.
15
a
0

Bit:
WRF071:
Initial value:

14
b
0

13
c
0

12
d
0

11
e
0

10
f
0

9
g
0

8
h
0

7
i
0

6
j
0

5
k
0

4
l
0

3
m
0

2
n
0

1
o
0

0
p
0

Figure 8.2 Special internal output for setting detailed function
Mode 1

Mode 0
Name

Bit

Value

Bit

Value

X0

-

-

-

X1

a

0

b

X2

-

-

-

X3

c

0

d

0
1
0
1
0
1
0
1

X4

-

-

-

X5

e

0

f

X6

-

-

-

X7

g

0

h

Name

Bit

Value

Bit

0
Y100

i

j
1
0

Y101

k

l
1
0

Y102

m

n
1
0

Y103

o

p
1

Function

Standard input (Fixed)
Standard input
Interrupt input
Standard input (Fixed)
Standard input
Interrupt input
Standard input (Fixed)
Standard input
Interrupt input
Standard input (Fixed)
Standard input
Interrupt input

Value

0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1

Value

Bit

Value

-

-

-

X1

a

0
1
0
0
1
0
0
1
0
1

X3

Function

Standard output
PWM output
Pulse output
Standard output
PWM output
Pulse output
Standard output
PWM output
Pulse output
Standard output
PWM output
Pulse output
-

c

0
1
0

b
d

X4

-

1
-

X5

e

0

f

X6

-

-

-

X7

g

0

h

Name

Bit

Value

Bit

-

Function

Counter input (Fixed)
Counter preload
Counter strobe
Standard input *1
Counter input (Fixed)
Counter preload
Counter strobe
Standard input *1
Standard input (Fixed)
Standard input
Interrupt input
Standard input (Fixed)
Standard input
Interrupt input

Value

Function

0
Counter output
1
Standard output *1
Y100
i
j
0
1
1
0
Counter output
0
1
Standard output *1
Y101
k
l
0
1
1
0
Standard output
0
1
PWM output
Y102
m
n
0
Pulse output
1
1
0
Standard output
0
1
PWM output
Y103
o
p
0
Pulse output
1
1
*1 : Supported by software version.1.11 or newer.
0

Mode 3

Name

Bit

Value

Bit

Value

X0

-

-

-

X1

a

0
1
0
－
0
1
0
－
0
1
0
－
0
1
0

X2

－

X3

c

X4

－

X5

e

X6

－
g

0
1
－
0
1
－
0
1
－
0

b
－
d
－
f
－
h

1
Name

Bit

X0

X2

Mode 2

X7

Name

Bit

Value

Bit

Function

Counter input (Fixed)
Counter preload
Counter strobe
Standard input *1
Counter input (Fixed)
Counter preload
Counter strobe
Standard input *1
Counter input (Fixed)
Counter preload
Counter strobe
Standard input *1
Counter input (Fixed)
Counter preload
Counter strobe
Standard input *1

Value

0
Counter output
1
Standard output *1
Y100
i
j
0
1
1
0
Counter output
0
1
Standard output *1
Y101
k
l
0
1
1
0
Counter output
0
1
Standard output *1
Y102
m
n
0
1
1
0
Counter output
0
1
Standard output *1
Y103
o
p
0
1
1
*1 : Supported by software version 1.11 or newer.
*2 : Configuration for 10 point type.

Name

Bit

Value

Bit

Value

X0
X1

－
a

－
0

－
b

X2
X3
X4
X5

－
c
－
e

1
－
0
－
0

－
d
－
f

X6
X7

－
g

－
0

－
h

－
0
1
0
－
0
－
0
1
－
0
1
0

1
Name

Bit

Value

Bit

Function

2 phase Counter 1A (Fixed)
Counter preload
Counter strobe
Standard input *1
2 phase counter 1B (Fixed)
Counter input 1Z (Fixed)
Standard input (Fixed)
Standard input
Interrupt input
Counter input (Fixed)
Counter preload
Counter strobe
Standard input *1

Value

0
Counter output
1
Y100
i
j
0
Standard output *1
1
1
0
Standard output
0
1
PWM output
Y101
k
l
0
Pulse output
1
1
0
Standard output
0
1
PWM output
Y102
m
n
0
Pulse output
1
1
0
Counter output
0
1
Y103
o
p
0
Standard output *1
1
1
*1 : Supported by software version 1.11 or newer.

Function

0

Function

0

Std. output *2
PWM output *2
Pulse output *2

8-3

*2 : Configuration of 10 point type.

Standard output *2
PWM output *2
Pulse output *2
-

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.1.4

Input/Output Setting (Mode 10)

Mode 10 had been added since Ver. 01.13. I/O assignment of mode 10 is very flexible as follows.
Parameter setting is compatible with existing mode 0 to 3 except for WRF071. Operation of FUN command (FUN 140 150) is same for all the mode 0 to 10.
 Outline
Input and output are configured in every group as below.
X0

X1

X2

X3

X4

X5

X6

X7

Y100

Y101

Y102

Y103

Group 1

Group 2

Group 3

Group 4

Fig. 8.4

Group of mode 10

 Mode setting
Set "H10" to the special internal output WRF070.
 In/output setting
Set parameter according to the following table to the special internal output WRF071.
Bit :

15

13

12

11

Group 1

WRF071 :
Default :

14

0

0

0

10

9

8

7

Group 2
0

0

0

0

Fig. 8.5

6

5

4

3

Group 3
0

0

0

2

1

0

Group 4

0

0

0

0

0

0

Bit table of WRF071

Select one of below combinations and set in WRF071 for every group.
Fig. 8.2 Parameter for in/output setting
Parameter
H0
H1
H2
H3
H4
H5
H6
H7
H8
H9
HA
HB
Others

X0 / 2 / 4 / 6
Standard input

X1 / 3 / 5 / 7
Standard input

Interrupt input

Counter input

Standard input
Preload input
Strobe input

Standard input

Standard input

Y100/101/102/103
Standard output
PWM output
Pulse output
Standard output
PWM output
Pulse output
Standard output
Counter output
Standard output
Counter output
Standard output
Counter output
Standard output

Since 10 points type does not have input X6 and X7, possible value for group 4 is 0 to 2.
 Example
Group
1
2
3
4

X0 : Standard input
X2 : Counter 2
X4 : Counter 3
X6 : Standard input

Function
X1 : Standard input
X3 :Preload input 2
X5 : Standard input
X7 : Interrupt input 4

Î WRF071 = H2873

8-4

Y100 : Pulse output 1
Y101 : Standard output
Y102 : Counter output 3
Y103 : Standard output

Value
Î H2
Î H8
Î H7
Î H3

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.1.5

Special Output Operation in CPU STOP Status

Generally the counter output, PWM output and pulse output are not generated if the CPU is in the STOP state. To output
these outputs when the CPU is in the STOP state, turn on the special internal output R7DC. By turning on the special
internal output R7DC for controlling the special outputs in the STOP state, the operation of the special outputs at the time
of test operation can be checked, and the outputs that are independent of the RUN and STOP states of the CPU can be
output. Note that the R7DC is set to 0 when the power is turned on. Also, if the output control flag (R7FC to R7FF) is
turned on while the CPU is in the STOP state and the R7DC is off, the output flag is turned off by the system.
R7DC
5]

R7FC toR7FF

1]

RUN
STOP
ON
Counter output
OFF

RUN/STOP

5]
5]

PWM output

5]

Pulse output
2]

3]

4]

Figure 8.4 Operation of special outputs when the CPU is in the RUN/STOP states
1]
2]
3]
4]
5]

When the R7DC is off, the output control flag is turned off by the system.
When the R7DC is on, the corresponding special output turns on by turning on the output control flag.
* The counter output of the counter turns on when the condition is satisfied.
The special outputs turn on and off according to the user program.
The special outputs are being output while the output condition is satisfied or the R7DC is on.
The special outputs turn on and off according to the RUN/STOP states of the CPU. The output control flag is turned
off by the system when the CPU operation stops.
* The special outputs continue to be output as long as the CPU operation continues, even if an error has occurred
when the operation is set to be continued when I/O assignments do not match or when a congestion error occurs.

8.1.6

Pulse / PWM Output adjustment

The transistor output that generates the pulse output and PWM output contains a hardware delay time. This delay time
affects the on-duty significantly as the frequency increases. In addition, this delay time is slightly different depending on
the CPU model. By setting the value that corresponds to the CPU model in the special internal output WRF06B for
setting the PWM/pulse output correction, both the PWM output and pulse output with no load in the system can be
corrected.
Caution: There will be a slight error even if correction setting is performed.
These special internal outputs are stored in the FLASH memory by turning on the various setting write request (R7F6).
Once the setting is stored in the FLASH memory, it is not necessary to make the setting again when the power is turned
on next time.
WRF06B:

Setting value indicating the CPU model
Figure 8.3 Special internal outputs for setting PWM/pulse output correction

CPU model
Setting value
EH-***DTP
H0001
EH-***DT
H0002
EH-***DRP
H0003
EH-***DRT
H0004
Other than above
Other than above
Note: *** changes depending on the CPU.

8-5

Remark

No correction

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.2

High-Speed Counter (Single-Phase)
The high-speed counter settings are stored in the special internal outputs (WRF070 to 7E). It is only possible to perform
the setting through the special internal output (WRF071) when the CPU is stopped and the output is turned off. Once all
the input/output settings are completed, the settings of each counter can be changed using the special internal outputs for
individual setting (WRF058 to 5B), regardless of whether the CPU is operating or stopped. In addition, the settings can
be changed by a program using the FUN instruction (FUN140 to 142, and 146). Refer to the chapter about the FUN
instruction for information about how to use the FUN instruction for setting.

8.2.1

Operation of Single-Phase Counter

(1) Basic operation
Figure 8.5 describes the basic operation of the high-speed counter.
FFFFH
2]

3]

4]

Off preset

1]

5]

7]

On preset

6]

0000H
U: Up counter
D: Down counter

U

Coincidence
output

ON

R7FC to R7FF

ON

U

D

U

D

D

U

D

INT2n

INT2m

OFF

OFF
Coincidence
interrupt
ON
n: Even number OFF
m: Odd number

INT2n INT2m

INT2n

1]

INT2n INT2m INT2n INT2n

INT2m

INT2n

4]
Off preset

On preset

Each coincidence interrupt
and INT number

Coincidence interrupt
occurrence
Coincidence output On
2]

Coincidence interrupt
Counter 1
occurrence
Coincidence output On
Counter 2

5]
Counter 3

On preset

Off preset

Coincidence interrupt
occurrence
Coincidence output Off

Coincidence interrupt
occurrence
Coincidence output Off

Counter 4

At on-preset
At off-preset
At on-preset
At off-preset
At on-preset
At off-preset
At on-preset
At off-preset

INT20
INT21
INT22
INT23
INT24
INT25
INT26
INT27

Figure 8.5 Basic operation of high-speed counter (single-phase)
Up counter
1] The counter output turns on* when the current counter value becomes larger than the on-preset value. The
interrupt process (INT2n) starts up if an interrupt program is used in the running user program.
2] The counter output turns off when the current counter value becomes larger than the off-preset value. The
interrupt process (INT2m) starts up if an interrupt program is used in the running user program.
3] The counter values wrap around in a ring. That is, the current counter value goes back to 0h when one more pulse
is counted after the maximum value (FFFFH) is reached.
Down counter
4] The counter output turns on* when the current counter value becomes smaller than the off-preset value. The
interrupt process (INT2m) starts up if an interrupt program is used in the running user program.
5] The counter output turns off when the current counter value becomes smaller than the on-preset value. The
interrupt process (INT2n) starts up if an interrupt program is used in the running user program.
6] The counter values wrap around in a ring. That is, the current counter value becomes FFFFH when one more
pulse is counted after the minimum value (0H) is reached. Note also that the initial value of the counter is 0H, and
the value reaches FFFFH after the first pulse is counted after the start of operation.

8-6

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

Others
7] The user program can switch from using a counter as an up counter to a down counter, as well as from a down
counter to an up counter while the counter is operating (using FUN142).
*

The counter output does not turn on unless the control output flag (R7FC to R7FF) is turned on.

(2) Preload input operation
When a preload signal is entered, the current counter value is reset to the preload value.
The counter output is controlled only when the on-preset value or off-preset value is exceeded by the progress of the
counter value. Because of this, the counter output maintains its status before the preload input when the on-preset or offpreset value is exceeded due to the preload value (when jumping from the Off area to the On area, or vice versa). Also,
the status of the counter output is reflected in the data memory at the timing of the refresh process. Therefore, it should be
noted that the status monitored by peripheral units, etc. and the actual output status may be different (by a delay of one
scan).
Preload input

Preload input

Preload input

Preload input

FFFFH
Off preset
Preload value
On preset
0000H
Coincidence ON
output
OFF

Figure 8.6 Preload input operation of high-speed counter (single-phase)
(3) Strobe input operation
When a strobe signal is entered, the current counter progress value is stored in the strobe storage area (WRF07A to 7D)
of the special internal output.
(4) Current value clear instruction operation
When the current value clear instruction (FUN144) is executed, the current counter value is reset (cleared) to zero.
The counter output is controlled only when the on-preset value or off-preset value is exceeded by the progress of the
counter value. Because of this, the counter output maintains its status before the execution of the current value clear
instruction when either the on-preset or off-preset value is exceeded due to the execution of the current value clear
instruction (when jumping from the Off area to the On area, or vice versa).
Current value clear

Current value clear

FFFFH
Off preset

On preset
0000H
Coincidence ON
output
OFF

Figure 8.7 Current value clear instruction operation of high-speed counter (single-phase)

8-7

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.2.2

Setting of Single-Phase Counter

If either one of operation modes 1, 2, or 3 is selected, the single-phase counter should be set using the special internal
output (WRF072 to WRF07E). In order to make the contents of the various settings valid, it is necessary to turn on the
special internal output R7F5. The settings can be changed using the FUN instruction during the CPU operation (some
settings cannot be changed, however.)
(1)

Setting the counter input
Bit:

15

14

13

12

11

10

9

8

WRF07E:

a

b

c

d

e

f

g

h

Initial value:

0

0

0

0

0

0

0

0

7

6

5

4

3

2

1

0

0

0

0

Not used
0

0

0

0

0

Figure 8.8 Special internal output for setting counter input
Setting
Count edge
value
Counter 1
a
0
Rising edge
1
Falling edge
Counter 2
b
0
Rising edge
1
Falling edge
Counter 3
c
0
Rising edge
1
Falling edge
Counter 4
d
0
Rising edge
1
Falling edge
*1 Can also be made valid by executing FUN142.
In case of mode 1, the settings for counter 3 and 4 are ignored.
In case of mode 3, the settings for counter 1 to 3 are ignored.
Bit

Bit
e
f
g
h

Setting
value
0
1
0
1
0
1
0
1

Count operation
Up count operation *1
Down count operation *1
Up count operation *1
Down count operation *1
Up count operation *1
Down count operation *1
Up count operation *1
Down count operation *1

(2) Setting the on-preset value
Set the count value at which the counter output is turned on (the on-preset value) for every counter used. Any value in the
range from 0 to FFFFH (0 to 65, 535) can be set. If the on-preset value is set to the same value as the off-preset value, the
counter will not perform any counting operation (see (5)).
WRF072:

On-preset value for counter 1

WRF073:

On-preset value for counter 2

WRF074:

On-preset value for counter 3

WRF075:

On-preset value for counter 4
Figure 8.9 Special internal outputs for setting the on-preset values

In case of mode 1, WRF074 and WRF075 are used to set the frequency for the PWM/pulse outputs.
In case of mode 3, WRF073 and WRF074 are used to set the frequency for the PWM/pulse outputs.
(3) Setting the off-preset value
Set the count value at which the counter output is turned off (the off-preset value) for every counter used. Any value in
the range from 0 to FFFFH (0 to 65, 535) can be set. If the off-preset value is set to the same value as the on-preset value,
or larger than the on-preset value, the counter will not perform any counting (see (5).).
WRF076:

Off-preset value for counter 1

WRF077:

Off-preset value for counter 2

WRF078:

Off-preset value for counter 3

WRF079:

Off-preset value for counter 4
Figure 8.10 Special internal outputs for setting off-preset values

In case of mode 1, WRF078 and WRF079 are used to set the on-duty for the PWM/pulse outputs.
In case of mode 4, WRF077 and WRF078 are used to set the on-duty for the PWM/pulse outputs.

8-8

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

(4) Setting the counter preload
When preloading is used, the value to be preloaded should be set for each counter used. Any value in the range from 0 to
FFFFH (0 to 65,535) can be set.
WRF07A:

Preload value for counter 1

WRF07B:

Preload value for counter 2

WRF07C:

Preload value for counter 3

WRF07D:

Preload value for counter 4
Figure 8.11 Special internal outputs for setting the preload values

This special internal output becomes valid immediately after the setting.
In case of mode 1, WRF07C and WRF07D are used to set the number of pulse outputs.
In case of mode 4, WRF07B and WRF07B are used to set the number of pulse outputs.
(5) At abnormal setting
If the on-preset and off-preset settings contain the same values for one or more counters when the PI/O function setting
flag (R7F5) is turned on, the corresponding bit in the error display special internal output turns on and the counters with
error settings do not perform any counting. (It does not count even if a counter input is entered.) In addition, the setting
abnormal flag (R7F7) turns on.

Bit:

15

WRF057:

a

14

13

12

11

10

9

8

Not used

7

6

5

4

3

2

1

0

b

c

d

e

f

g

h

i

Figure 8.12 Special internal output for setting error display
Bit
a
b
c
d
e
f
g
h
i

Description of abnormality
Total pulse frequency abnormality
Pulse 4 frequency abnormality
Pulse 3 frequency abnormality
Pulse 2 frequency abnormality
Pulse 1 frequency abnormality
Counter 4 preset value abnormality
Counter 3 preset value abnormality
Counter 2 preset value abnormality
Counter 1 preset value abnormality

Related terminal
Y100 to Y103
Y103
Y102
Y101
Y100
X6
X4
X2
X0

(6) Individual counter setting
The on-preset and off-preset values can be changed for each counter by the special internal outputs for individual setting
regardless of whether the CPU is operating or stopped. Turn on the corresponding bit in the following special internal
outputs when only the on-preset or the off-preset value should be changed for a certain counter input. (To change both
settings at the same time, set the “H3” in the corresponding special internal outputs for individual setting.)
Moreover, when the specified on-preset and off-preset values are the same, the corresponding bit of the error display
special internal output is turned on and operation is performed using the preset value before the setting. (The set value for
the special internal output also returns to the preset value before the setting was made)

WRF058:

Counter 1

15
Not used

2

1
a

0
b

WRF059:

Counter 2

Not used

a

b

WRF05A:

Counter 3

Not used

a

b

WRF05B:

Counter 4

Not used

a

b

Figure 8.13 Special internal outputs for individual counter setting
Bit
a
b

Description
Off-preset change request
On-preset change request

In case of mode 1, WRF05A and WRF05B are used to set individual PWM/pulse outputs.
In case of mode 4, WRF059 and WRF05A are used to set individual PWM/pulse outputs.

8-9

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.3

High-Speed Counter (Two-Phase Counter)
When operation mode 3 is selected, two-phase counters can be used. Four kinds of phase counting modes are available
for two-phase counters.
The settings of the two-phase counters are stored in the special internal outputs (WRF06F to 72, 76, 7A, and 7E). It is
only possible to perform the settings through the special internal output (WRF071) when the CPU is stopped and the
output is turned off. Once all the input/output settings are completed, the setting of each counter can be changed using the
special internal outputs for individual setting (WRF058), regardless of whether the CPU is operating or stopped. In
addition, the setting can be changed by a program using the FUN instruction (FUN140 to 142, and 146). Refer to the
chapter about the FUN instruction for information about how to use the FUN instruction for setting.

8.3.1

Operation of Two-Phase Counters

The phase counting mode settings are stored in the special internal output (WRF06F). The operation of the counter values
is the same as for a single-phase counter and likewise wrap around from 0000H to FFFFH. In case of an up counter, the
count value becomes 0000H if one more pulse is input while the current count value is FFFFH. In case of a down counter,
the count value becomes FFFFH if one more pulse is input while the current count value is 0000H. Moreover, the preload
input operation, strobe input operation, and executing operation of the current value clear instruction are run in the same
manner as for a single-phase counter. The status of the counter output is stored in the data memory at the timing of the
refresh process. Therefore, it should be noted that the status monitored by peripheral units, etc. and the actual output
status may be different (by a delay of one scan).
(1) Phase counting mode 0
The counter counts up when input 1A is ahead of input 1B, and down when input 1A is lagging behind input 1B.
Input 1A
Input 1B
Count
value
Off preset
value

On preset
value
Coincidence
output

Figure 8.14 Counting operation of phase counting mode 0
Input 1A
1 (High)
0 (Low)
↓ (Falling edge)
↑ (Rising edge)
0 (Low)
1 (High)
↓ (Falling edge)
↑ (Rising edge)

Input 1B
↑ (Rising edge)
↓ (Falling edge)
1 (High)
0 (Low)
↑ (Rising edge)
↓ (Falling edge)
0 (Low)
1 (High)

8-10

Operation
Up count

Down count

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

(2) Phase counting mode 1
In this mode the counter counts at the rising edge of input 1A. At this point, if input 1B is 0 (Low) it counts up, and if
input 1B is 1 (High) it counts down.
Input 1A
Input 1B
Count value
Off preset

On preset
Coincidence
output

Figure 8.15 Counting operation of phase counting mode 1
Input 1A
1 (High)
0 (Low)
↓ (Falling edge)
↑ (Rising edge)
0 (Low)
1 (High)
↓ (Falling edge)
↑ (Rising edge)

Input 1B
↑ (Rising edge)
↓ (Falling edge)
1 (High)
0 (Low)
↑ (Rising edge)
↓ (Falling edge)
0 (Low)
1 (High)

Operation
Do not count

Up count
Do not count

Down count

(3) Phase counting mode 2
In this mode, if input 1B is 0 (Low) at the rising edge of input 1A the counter counts up, and if input 1A is 0 (Low) at the
rising edge of input 1B, the counter counts down.
Input 1A
Input 1B
Count
value
Off preset
On preset
Coincidence
output

Figure 8.16 Counting operation of phase counting mode 2
Input 1A
1 (High)
0 (Low)
↓ (Falling edge)
↑ (Rising edge)
0 (Low)
1 (High)
↓ (Falling edge)
↑ (Rising edge)

Input 1B
↑ (Rising edge)
↓ (Falling edge)
1 (High)
0 (Low)
↑ (Rising edge)
↓ (Falling edge)
0 (Low)
1 (High)

8-11

Operation
Do not count

Up count
Down count
Do not count

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

(4) Phase counting mode 3
In this mode the counter counts at the rising and falling edge of input 1B. It counts up when input 1A is more ahead of
input 1B, and down when input 1A is lagging behind input 1B.
Input 1A
Input 1B
Count
value
Off preset

On preset

Coincidence
output

Figure 8.17 Counting operation of phase counting mode 3
Input 1A
1 (High)
0 (Low)
↓ (Falling edge)
↑ (Rising edge)
0 (Low)
1 (High)
↓ (Falling edge)
↑ (Rising edge)

Input 1B
↑ (Rising edge)
↓ (Falling edge)
1 (High)
0 (Low)
↑ (Rising edge)
↓ (Falling edge)
0 (Low)
1 (High)

Operation
Up count
Do not count
Down count
Do not count

(5) Clear input operation (common to all the phase counting modes)
The count value is cleared at the rising edge of input 1Z. As an example, the clear operation of phase counting mode 4 is
shown in Figure 8.18. (The clear operation works identically for all four phase counting modes.)
Input 1A
Input 1B
Input 1Z
Count
value
Off preset

On preset

Coincidence
output

Figure 8.18 Count value clear operation (phase counting mode 4)

8-12

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.3.2

Setting of Two-Phase Counter

The setting of the two-phase counters are stored in the special internal outputs (WRF072 to WRF07E).
(1) Phase counting mode
Set the phase counting mode (0-3) in WRF06E. Please see the chapter 8.3.1 about phase counting mode.
WRF06F:

Phase counting mode
Figure 8.19 Special internal output for phase counting mode

(2) Setting the on-preset value
Set the count value (the on-preset value) at which the counter output is turned on (or off). Any value in the range from 0
to FFFFH (0 to 65, 535) can be set. If the on-preset value is set to the same value as the off-preset value, or smaller than
the off-preset value, the counter will not perform any counting (see (4).).
WRF072:

On-preset value for two-phase counter
Figure 8.20 Special internal output for setting the on-preset value

(3) Setting the off-preset value
Set the count value (the off-preset value) at which the counter output is turned off (or on). Any value in the range from 0
to FFFFH (0 to 65, 535) can be set. If the off-preset value is set to the same value as the on-preset value, or larger than the
on-preset value, the counter will not perform any counting (see (4).).
WRF076:

Off-preset value for two-phase counter
Figure 8.21 Special internal output for setting the off-preset value

(4) Setting the counter preload
When preloading is used, the value to be preloaded should be set for each counter used. Any value in the range from 0 to
FFFFH (0 to 65, 535) can be set.
WRF07A:

Preload value for two-phase counter
Figure 8.22 Special internal output for setting the preload value

This special internal output becomes valid immediately after the setting.
(5) Diagnostic error
If the on-preset and off-preset settings contain the same values for one or more counters when the PI/O function setting
flag (R7F5) is turned on, the corresponding bit in the abnormality display special internal output turns on and the
counters with abnormal settings do not perform any counting. (It does not count even if a counter input is entered.) In
addition, the setting abnormal flag (R7F7) turns on.
Bit:

15

WRF057:

a

14

13

12

11

10

9

Not used

8

7

6

5

4

3

2

1

0

b

c

d

e

f

g

h

I

Figure 8.23 Special internal output for input/output function abnormality

Bit
a
b
c
d
e
f
g
h
i

Description of abnormality
Total pulse frequency abnormality
Pulse 4 frequency abnormality
Pulse 3 frequency abnormality
Pulse 2 frequency abnormality
Pulse 1 frequency abnormality
Counter 4 preset value abnormality
Counter 3 preset value abnormality
Counter 2 preset value abnormality
Two-phase counter 1 preset value abnormality

8-13

Related terminal
Y100 to Y103
Y103
Y102
Y101
Y100
X6
X0 to X3

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

(5) Individual counter setting
The on-preset and off-preset values can be changed for each two-phase counter by the special internal output for
individual setting (WRF058) regardless of whether the CPU is operating or stopped. Turn on the corresponding bit in the
following special internal outputs when only the on-preset or the off-preset value should be changed for a two-phase
counter. (To change both settings at the same time, set the “H3” in the corresponding special internal outputs for
individual setting.)
Moreover, when the specified on-preset and off-preset values are the same, the corresponding bit of the error display
special internal output is turned on and operation is performed using the preset value before the setting. (The set value for
the special internal output also returns to the preset value before the setting was made)
15
WRF058:

Two-phase
counter

2
Not used

1

0

a

b

Figure 8.24 Special internal output for individual setting of counter setting values

Bit
a
b

Description
Off-preset change request
On-preset change request

8-14

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.4

PWM Output
A PWM output can be set as an output by setting the operation mode and output terminal. By setting an output to a PWM
output, a pulse with a duty ratio in the range that corresponds to the specified frequency can be output.

8.4.1

Operation of PWM Output

The PWM output settings are stored in the special internal outputs. It is only possible to perform the settings through the
special internal output when the CPU is stopped and the output is turned off. Once all the input/output settings are
completed, the setting of each PWM output can be changed using the special internal outputs for individual setting,
regardless of whether the CPU is operating or stopped. In addition, the settings can be changed by a program using the
FUN instruction (FUN148). See the chapter about the FUN instruction for information about how to use the FUN
instruction for setting.
(1) Basic operation
The special internal outputs R7FC to R7FF are used to control the output. When these special internal outputs are turned
on, a pulse is output at the frequency and the on-duty set in the special internal outputs (WRF072 to 79). When the
special internal output for output control is turned off, the PWM output is also turned off. The special internal outputs
R7FC to R7FF correspond to PWM outputs 1 to 4 (Y100 to Y103); for example, if R7FD is turned on, a pulse train is
output from PWM output 2 (Y101). The on/off status of the PWM outputs is not stored in the data memory. Therefore,
the status of the terminals used for PWM output monitored by peripheral units, etc. may be different from the actual
status of the PWM output terminals.
When a fatal or serious error occurs in the CPU, there will be no output. The output is also stopped if a fatal or serious
error occurs in the CPU during output.
R7FC to R7FF
Frequency
On duty
t
Output pulse

Figure 8.25 Basic operation of PWM output
(2) Operation when setting values are changed
The settings of each PWM output (frequency and on-duty) can be changed by the FUN instruction or the special internal
outputs (WRF072 to 79) regardless of whether the CPU is operating or stopped.
Change in both
frequency and
On duty

R7FC to R7FF

Change in On duty

Change in
frequency

Frequency

On duty
t

Output pulse

Figure 8.26 Operation of PWM output when setting values are changed.
(3) Operation at abnormal settings
The PWM output is not output if the on-duty is set to a value other than the range in use. However, the FUN instruction
does not execute setting change when the setting value is abnormal.
R7FC to R7FF
On-duty setting value:
exceeding the range

On-duty setting value:
within the range

Frequency
On duty
t
Output pulse
Normal settings

Abnormal
settings

Normal settings

Figure 8.27 Operation of PWM output at abnormal settings
8-15

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.4.2

Setting the PWM Output

The settings of the PWM output operation are stored in the special internal outputs (WRF072 to WRF079).
(1) Setting the PWM output frequency
Set the frequency of output pulse for each PWM output to be used in special internal outputs. The setting values must be
10 to 2000 (HA to H7D0). If the frequency value is set to less than 10 Hz, it is changed to 10 Hz by the system.
It should be noted that the maximum frequency of the PWM output is 2 kHz. Even if a value larger than the maximum
frequency is set, an error flag, etc. will not be output, so be careful not to set a frequency that exceeds 2 kHz.
(Example) If the output frequency is 1 kHz, set “1000” (H3E8) in the special internal outputs.
WRF072:

Output frequency for PWM output 1

WRF073:

Output frequency for PWM output 2

WRF074:

Output frequency for PWM output 3

Output frequency for PWM output 4
WRF075:
Figure 8.28 Special internal outputs for setting the PWM output frequency
In case of mode 1, WRF072 and WRF073 are used to set the on-preset value of a counter.
In case of mode 4, WRF072 and WRF075 are used to set the on-preset value of a counter.
(2) Setting the PWM output on-duty value
Set the on-duty value in the corresponding special internal output for each PWM output to be used. The setting values are
0 to 100 (H0 to H64) when the auto correction of on-duty values is not performed. If an on-duty value exceeding this
range is specified, PWM outputs will not be generated. When performing auto correction, the range of on-duty values
that can be set differs depending on the frequency and CPU mode to be set. For more details on the auto correction, see
Section 8.1.5. When a function other than PWM is assigned, this setting is not necessary.
(Example) If the on-duty value is 70 %, set “70” (H46) in the special internal outputs.
WRF076:

On-duty value for PWM output 1

WRF077:

On-duty value for PWM output 2

WRF078:

On-duty value for PWM output 3

On-duty value for PWM output 4
WRF079:
Figure 8.29 Special internal outputs for setting PWM output on-duty
In case of mode 1, WRF076 and WRF077 are used to set the off-preset value of a counter.
In case of mode 4, WRF076 and WRF079 are used to set the off-preset value of a counter.

8-16

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

(3) Effective range of PWM output on-duty values
When correcting on-duty values by setting the value that corresponds to the CPU model in the special internal output
(WRF06B) for setting PWM/pulse output correction, the effective range of the on-duty values differs depending on the
frequency and CPU model to be used. The effective range of the on-duty values is calculated from the following
expressions. For the hardware delay time in the expressions, see Table 6.2.
Caution: There will be a slight error even if correction setting is performed.
On-duty lower limit value (%) = Hardware delay time (µs) x Frequency used (Hz) x 10-4
On-duty upper limit value (%) = 100 - Hardware delay time (µs) x Frequency used (Hz) x 10-4
Table 8.2 Transistor output delay time for each CPU model
CPU model
EH-***DTP
EH-***DT
EH-***DRP
EH-***DRT

Hardware delay time (TYP)
50 µs
70 µs
75 µs
25 µs

Remark

Example: If the CPU model is EH-***DRP and the PWM output is 2 kHz,
On-duty lower limit value = 50 x 2000 x 10-4 = 10 %
On-duty upper limit value = 100 - (50 x 2000 x 10-4) = 90 %
Thus, the effective range of on-duty values will be 10 % to 90 %.
If correction is not performed (0 is set in WRF06B), on-duty values can be set in the range of 0 to 100 %. However,
caution must be exercised since there will be an error for the period of transistor output delay time between the specified
on-duty and the on-duty that is actually output.
(4) Setting abnormality
When the PI/O function setting flag (R7F5) is turned on, and a value exceeding the effective range of on-duty values is
set for the on-duty setting value of each PWM output (WFR076 to WRF079), PWM outputs will not be generated.
(Example of incorrect setting) PWM output 2 kHz
On-duty setting value (WRF076) - 95
(5) Individual PWM output setting
The frequency and on-duty can be set for each PWM output by the special internal outputs regardless of whether the CPU
is operating or stopped. By setting “H1” in the special internal outputs listed below, it is changed to the frequencies set in
the special internal outputs (WRF072 to WFR075) and the on-duty values set in the special internal outputs (WRF076 to
WFR079). When changing the setting, if any of the on-duty setting values (WRF076 to WRF079) for PWM outputs is set
to a value exceeding the effective range, PWM outputs will not be generated.
15

2

1

WRF058:

PWM output 1

Not used

0
a

WRF059:

PWM output 2

Not used

a

WRF05A:

PWM output 3

Not used

a

WRF05B:

PWM output 4

Not used

a

Figure 8.30 Special internal outputs for setting individual PWM outputs

Bit
a

Description
PWM output: individual setting value change request

8-17

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.5

Pulse Train Output
A pulse output can be assigned to an output by setting an output terminal. By setting an output to pulse output, a specified
number of consecutive pulses with a duty ratio of 30 to 70 % can be output. ((To output a pulse having a duty ratio of
50 %, set the value corresponding to the CPU model in the special internal output WRF06B, by referring to Section
8.1.4.) A minimum of 10 Hz to a maximum of 5 kHz can be specified as frequency values. (The maximum frequency of
5 kHz represents the total of all pulse output frequencies.)

8.5.1

Operation of Pulse Output

The settings of the pulse outputs are stored in the special internal outputs. It is only possible to perform the settings
through the special internal output when the CPU is stopped and the output is turned off. Once all the input/output
settings are completed, the setting of each chain output can be changed using the special internal outputs for individual
setting, regardless of whether the CPU is operating or stopped. In addition, by using the FUN instruction, settings can be
changed by a program (FUN150), or pulse outputs with the acceleration/deceleration function can be generated
(FUN151). Refer to the chapter about the FUN instruction for information about how to use the FUN instruction for
setting.
(1) Basic operation
The special internal outputs R7FC to R7FF are used to control the output. When these special internal outputs are turned
on, a pulse train is output at the frequency set in the special internal outputs (WRF072 to 7D) for the set number of pulses.
After the set number of pulses is output, the special internal outputs R7FC to R7FF for output control are turned off by
the system. The special internal outputs R7FC to R7FF correspond to pulse outputs 1 to 4 (Y100 to Y103); for example,
if R7FD is turned on, a pulse is output from pulse output 2 (Y101). If peripheral units, etc. forcefully turn these special
internal outputs off, the pulse output is turned off even if the set number of pulses has not yet been output. The on/off
status of the PWM output is not stored in the data memory. Therefore, the status of the terminals used for pulse output
monitored by peripheral units, etc. may be different from the actual status of the pulse output terminals.
When a fatal or serious error occurs in the CPU, there will be no output. The output is also stopped if a fatal or serious
error occurs to the CPU during output.
In addition, pulses are not output while the backup memory is being written (R7EF=1). Therefore, care should be taken
when handling the pulse output immediately after a program transfer or after a program change while running.
Number of output
pulses 2
R7FC to R7FF
Frequency

Pulse output

Turned off by
the system

Pulse output

Forcefully
turned off

Pulse output

Turned off by
the system

Frequency/2
t
Output pulse

Figure 8.31 Basic operation of pulse output
(2) Operation when setting values are changed
The settings of the pulse outputs (frequency and number of output pulses) can be changed by the FUN instruction or the
special internal outputs (WRF072 to 7D) regardless of whether the CPU is operating or stopped. If the settings are made
during the execution of a program in such way that the total frequency of all the pulse outputs exceeds 5 kHz, the
frequency settings will not be changed. Also, the corresponding bit in the abnormality display special internal output is
turned on, and the output will continue to operate at the previously set frequency. (The setting value of the special internal
output also returns to the value set before the abnormal setting was made.)
R7FC to R7FF
Frequency change

Frequency

Frequency
change

Frequency
change (set to
exceed 5 kHz)

Frequency
change

Frequency/2
t
Output pulse
In case the frequency becomes 5 kHz or more, the previous setting value is used for operation.

Figure 8.32 Operation when the pulse output frequency is changed
8-18

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

To change the number of output pulses, the following operation will be performed:
1] When the number of pulses is to be changed to a value larger than the number of pulses currently being output,
pulses will be output until the number of newly changed pulses is reached, and then the pulse output stops.
2] When the number of pulses is to be changed to a value smaller than the number of pulses currently being output,
the pulse output stops when the current number of pulses is reached.
R7FC to R7FF
Frequency

1]

Change of the number
of pulses 2 → 4

2]

Change of the number
of pulses 6 → 3

Frequency/2
t
Output pulse

Figure 8.33 Operation for changing the number of pulse output

8.5.2

Setting of Pulse Output

The settings of the pulse outputs are stored in the special internal outputs (WRF072 to WRF07D).
(1) Setting the pulse output frequency
Set the frequency of the output pulse for each pulse output to be used in all of the special internal outputs shown below.
The setting values are 10 to 5000 (HA to H1388). If a value less than 10 Hz is set, it is internally changed to 10 Hz by the
system. When setting the frequencies, make sure that the total value of all pulse output frequencies stays within 5 kHz.
(Example 1)
(Example 2)

WRF072:

Assuming there is one point of pulse output and the output frequency is 5 kHz:
Setting value = 5000 (H1388)
Assuming there are three points of pulse output and the output frequencies are 1 kHz, 1 kHz, and 3 kHz,
respectively (the settings should be made so that the sum of the output frequencies set for each of the
pulse outputs becomes 5 kHz or less.):
Setting value = 1000 (H3E8)
Setting value = 1000 (H3E8)
Setting value = 3000 (HBB8)
Output frequency for pulse output 1

WRF073:

Output frequency for pulse output 2

WRF074:

Output frequency for pulse output 3

WRF075:

Output frequency for pulse output 4
Figure 8.34 Special internal outputs for setting output frequencies

In case of mode 1, WRF072 and WRF073 are used for setting the on-preset value of a counter.
In case of mode 4, WRF072 and WRF075 are used for setting the on-preset value of a counter.
(3) Setting the number of output pulses
Set the number of output pulses for each pulse output used. The setting values are 0 to 65535 (H0 to HFFFF). If the
number of output pulses is set to “0,” no pulses will be output.
WRF07A:

Number of output pulses for pulse output 1

WRF07B:

Number of output pulses for pulse output 2

WRF07C:

Number of output pulses for pulse output 3

WRF07D:

Number of output pulses for pulse output 4
Figure 8.35 Special internal outputs for setting number of output pulses

In case of mode 1, WRF07A and WRF07B are used for setting the preload strobe value.
In case of mode 4, WRF07A and WRF07D are used for setting the preload strobe value.

8-19

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

(4) At setting abnormality
If the sum of the frequencies of the pulse outputs is set to exceed 5 k when the PI/O function setting flag (R7F5) is turned
on, the bit for the total pulse frequency abnormality in the error display special internal output turns on, and none of the
pulse outputs are output. In addition, individual setting of pulse outputs cannot be performed when the bit for the total
pulse frequency abnormality is turned on.
Bit:

15

WRF057:

a

14

13

12

11

10

9

8

Not used

7

6

5

4

3

2

1

0

b

c

d

e

f

g

h

i

Figure 8.36 Special internal output for input/output function abnormality
Bit
a
b
c
d
e
f
g
h
i

Description of abnormality
Total pulse frequency abnormality
Pulse 4 frequency abnormality

Related terminal
Y100 to Y103
Y103

Pulse 3 frequency abnormality
Pulse 2 frequency abnormality
Pulse 1 frequency abnormality
Counter 4 preset value abnormality
Counter 3 preset value abnormality
Counter 2 preset value abnormality
Counter 1 preset value abnormality

Y102
Y101
Y100
X6
X4
X2
X0

(5) Individual setting of pulse outputs
It is possible to set the frequency and number of output pulses for each pulse output by the special internal outputs for
individual setting, regardless of whether the CPU is operating or stopped. Turn on the corresponding bit in the following
special internal outputs when only the pulse frequency or number of output pulses should be changed.
If the total of frequencies exceeds 5 kHz as a result of performing individual setting of pulse outputs for pulse outputs
that are working normally, the bit for the error display special internal output that corresponds to the changed pulse output
will turn on, and that pulse output will work at the frequency before the setting change. (The value set in the special
internal output also returns to the previous value before the setting was made.)
15

2

WRF058:

Pulse output 1

Not used

1
a

WRF059:

Pulse output 2

Not used

a

b

WRF05A:

Pulse output 3

Not used

a

b

WRF05B:

Pulse output 4

Not used

a

b

Figure 8.37 Special internal outputs for setting individual pulse outputs
Bit
a
b

Description
Number of output pulse change request
Output pulse frequency change request

8-20

0
b

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.6

Interrupt Input
When either operation mode 0, 1, or 3 is selected, it is possible to assign an interrupt input to X1, X3, X5, and X7 by the
special internal output (WRF07F). (The 10-point type CPU does not have X7.) It is only possible to set them by the
special internal output under the conditions where the CPU is stopped and the output is off.
When an interrupt input is entered, an interrupt process determined by a user program starts up. The INT numbers
corresponding to the interrupt inputs are listed in Table 8.2. See the chapter about the instruction specifications for the
interrupt input processing.
Table 8.3 Interrupt input – correspondence table
Interrupt input
Terminal
INT No.
Interrupt input 1
X1
INT16
Interrupt input 2
X3
INT17
Interrupt input 3
X5
INT18
Interrupt input 4
X7
INT19

8.7

Digital Filter
The input can set digital filter functions (when assigned normal input functions in X0 to X7 with operation mode 0, 1, or
3, be set to the input too). The sampling number of the digital filter is stored in the special internal output (WRF07F). The
sampling number is set in 0.5ms unit (0 to 40, i.e., 0 to 20ms). When the value 0 is set, there is no filter, and when 41 or
more is set, it is treated as a sampling number of 40 (20ms). This special internal output is stored in the FLASH memory
by turning on the various setting write requests (R7F6). Once the setting is stored in the FLASH memory, it is not
necessary to make the setting again when the power is turned on next time.
The input status is maintained in the buffer for the maximum sampling number. When the input status is read, the status
for the past set number of sampling numbers is looked up, and if there was no change, that status is read. If there were
changes, the status before the change is read.
WRF07F:

Input sampling number
Figure 8.38 Special internal output for setting normal input sampling number

The above-mentioned setting is stored immediately upon the completion of the setting. Moreover, it is invalid for inputs
assigned to counter input.

8-21

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.8

Potentiometers
CPUs other than of the 10-point type are equipped with two potentiometers. Through the use of these potentiometers, it
becomes possible to change values in the special internal outputs from the outside using a tool that looks like a
screwdriver. The resolution is 10 bits, so it is possible to adjust the values from 0 to 3FFH (1 to 1,023).
The potentiometers are found under the cover on the left side of the main unit. The value becomes larger when the dial is
turned clockwise and smaller when turned counterclockwise. In addition, this value is always stored in the special
internal output, regardless of whether the CPU is operating or stopped.
VR1

L

VR2

H

L

H

Figure 8.39 Potentiometers
(1) Values of the potentiometers
The values entered by means of the potentiometers are stored in the following special internal outputs.
WRF03E:

Potentiometer 1 input value

WRF03F:

Potentiometer 2 input value
Figure 8.40 Potentiometer input value storage special internal output

(2) Setting a filter for the potentiometer
The input values of the potentiometers fluctuate depending on the operating environment of the main unit etc. If the ratio
of fluctuation is to be reduced, a sampling number can be set in the following special internal output. Once the sampling
number is set, the average of the data obtained in the time period determined by the sampling number calculated by
internal processing is set in WRF03E and WRF03F.
The sampling number can be set between 0 and 40 (0 to 28H). If 0 is set, the data without average is stored in WRF03E
and WRF03F. If a value greater than 41 is set, the sampling number is treated as 40.
WRF06C:
WRF06D:

Potentiometer 1 data sampling number
Potentiometer 2 data sampling number
Figure 8.41 Special internal output for setting input data sampling number

This special internal output is stored in the FLASH memory by turning on various setting write requests (R7F6). Once it
is stored in the memory, it is not necessary to set the value again when the power is turned on for the next time.
(3) Example
The following shows a simple ladder program using the potentiometers:
WR0 = WRF03E
LSR(WR0,4)

WR0
==
0
WR0
==
1F
WR0
==
3F

Y100

1] Always substitute the value of potentiometer 1 to
WR0.
2] Delete the lower four bits of WR0 (because lower
four bits are more prone to error due to changes in
resistance caused by temperature, etc.)
3] If WR0 is “0,” Y100 is turned on.

Y101
4] If WR0 is 1F, Y101 is turned on.
Y102
5] If WR0 is 3F, Y102 is turned on.

By turning potentiometer 1, one of flags Y100 to Y102 turns on.

8-22

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.9

Analogue Input
The 23-point type CPU is equipped with two points of analogue input. The input to these two points can be set to voltage
input or current input individually. The setting of current or voltage input is made in the special internal output WRF06E.
This special internal output is stored in the FLASH memory by turning on various setting write requests (R7F6). Once it
is stored in the memory, it is not necessary to set the value again when the power is turned on for the next time.
Bit:

15

14

WRF06E:

a

b

Initial value:

13

12

11

10

9

8

7

6

5

4

3

2

1

0

Not used

0
0
Figure 8.42 Special internal output for selecting the analogue type
WRF06E
Setting value
C000H
8000H
4000H
0000H

Function
Analogue CH0 (Bit a)
Current input
Current input
Voltage input
Voltage input

Analogue CH1 (Bit b)
Current input
Voltage input
Current input
Voltage input

Please note that the external wiring is different for voltage input and current input. See the section regarding analogue
system wiring for the details.
Through the above-mentioned settings, the input data of channel 0 is stored in WX 30 and the input data of channel 1 is
stored in WX31. The correspondence between analogue data and digital data is shown in the figure 8.40 (divide 0 to 10 V
and 0 to 20 mA in 0 to 4000). The voltage data is converted to 0.0025 [V] per 1H and the current data is converted to
0.005 [mA] per 1H. Therefore, the value ranges that can be measured from the output channel are 0 to 10.2375 [V] for
voltage data and 0 to 20.475 [mA] for current data, respectively.
FA0H
(4000)

FA0H
(4000)

7D0H
(2000)

7D0H
(2000)

V
0

5

mA

10

0

10

20

Figure 8.43 Correspondence diagrams of digital and analogue input
(Example)
If analogue input channel 0 is set to voltage input and the analogue input channel 1 is set to current input, and 3V and
14mA are applied respectively, 4B0H (1200) is stored in WX30 and AF0H (2800) is stored in WX31.

8.10 Analogue Output
The 23-point type CPU is equipped with one point of analogue output. In analogue output, digital values set at WY40 are
converted to analogue output, and then output. Switching between voltage output/current output is performed by external
wiring; analogue voltage outputs are output when connected to a voltage output terminal, and analogue current output
when connected to a current output terminal.
The correspondence between analogue data and digital data is shown in the figure 8.41 (divide 0 to 10 V and 0 to 20 mA
in 0 to 4000). The voltage data is converted to 0.0025 [V] per 1H and the current data is converted to 0.005 [mA] per 1H.
Therefore, the values that can be output from the output channel are 0 to 10.2375 [V] for voltage data and 0 to 20.475
[mA] for current data, respectively.
V

mA

10

5

0

20

10

7D0H

FA0H

(2000)

(4000)

0

7D0H
(2000)

FA0H
(4000)

Figure 8.44 Correspondence diagrams of digital and analogue output
(Example)
If 5F0H (1520) is set in WY40, 3.8 V is output from the analogue voltage output terminal. When reconnected to the
analogue current output terminal, 7.6 mA is output. Please note that if connected to both terminals by mistake, the correct
output value will not be output.
8-23

Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O

8.11 Analogue Expansion unit
Analogue expansion module has 4 ch. of analog input and 2 ch. of analog output, which is configured by dip switches.

 Range setting
Analogue input range setting (Common for all input channels.)
Sw1

Sw2

Range

Remarks

Dip switch
(Default setting)

off

off

0 - 10V

off

ON

0 - ±10V

Default setting

SW1 → 1

ON

off

0 - 20mA

ON

ON

4 - 20mA

SW2 → 2
SW3 → 3

Analogue output range setting (Common for all output channels.)
Sw3

Sw4

Range

off

off

off

ON

ON

off

0 - 20mA

ON

ON

4 - 20mA

0 - 10V

O
N

SW4 → 4
Remarks

SW5 → 5

Default setting

SW6 → 6
SW7 → 7
SW8 → 8

Conversino mode
Sw6
off

Conversion mode

Remarks
Default setting

 I/O assignment, data table
I/O assignment = "FUN 0"
WX u00

System area

Do not use this area.

WX u01

Ch.1 Input data

Data in lower 12 bits.

WX u02

Ch.2 Input data

Always 0 in higher 4 bits.

WX u03

Ch.3 Input data

0000H - 0FFFH

WX u04

Ch.4 Input data

WY u05

System area

Do not use this area.

WY u06

Ch.6 Output data

Data to be written in lower 12 bits.

WY u07

Ch.7 Output data

0000H -0FFFH

u : Unit number (1 - 4)
Example : Unit 1, Input ch.2 → WX102

Unit 4, Output ch.7 → WY407

 In/output data table
0 - 10V / 0 - 20mA / 4 - 20mA
0V / 0mA / 4mA
5V / 10mA / 12mA
10V / 20mA / 20mA

Mode 4000
0
H07D0 (2000)
H0FA0 (4000)

-10 - +10V (only for analog input)
Mode 4000
-10V
H0830 (-2000) *
0V
0
+10V
H07D0 (2000)
* 2's complement

ON

Caution : Set dip switch while power off.

4,096 (H0FFF)

ON
4,000 (H0FA0)
Sw5,7,8 : Set off always.

OFF

Mode 4096
0
H07FF (2047)
H0FFF (4095)
Mode 4096
H0800 (-2048) *
0
H07FF (2047)

8-24

Chapter 9 PLC Operation

Chapter 9

PLC Operation

The operating status and stop status of the MICRO-EH can be switched through various types of operations. This feature
is shown in Figure 9.1.
Cancel operation definition input
Switch “RUN” and
operation definition
input “ON”

Switch “RUN”
Stop status

Operating status
Switch “STOP”

Stop status
Switch “STOP” or
operation definition
input “OFF”

Designate operation definition input
Caution
The MICRO-EH cannot handle a REMOTE
specification. A 10-point type CPU becomes
the RUN mode when the RUN input is On.
Figure 9.1 Transitional diagram between operating and stop statuses
The MICRO-EH can be operated or stopped under the conditions as shown in Figure 9.1. If an error is detected during
operation or stop, output is shut off, an error is displayed and the MICRO-EH stops. There are fatal error, serious error,
minor error and warning. The operating status for each error is listed in Table 9.1.

Classification
Fatal error
Serious error

Minor error

Warning

Table 9.1 Description of each error and operating status
Description
This indicates there is a fatal and unrecoverable error, such as a power
supply problem, microcomputer error, system ROM error, system RAM
error and system path error.
This indicates there is an error such as data memory problem, system
program problem, user memory problem, user memory size error,
syntax/assembler error, etc., which may cause a malfunction if operation is
continued.
These are errors such as I/O information verify error, remote problem,
congestion error, excessively assigned I/O points, etc. The operation may be
continued when a continue operation is set by the user programs.
These are problems such as a transfer error, backup memory write problem,
etc. where it is possible to continue the operation.

9-1

Run/Stop
Stops
Stops

Stops
(continued operation
is possible if
specified)
Operation continues

Chapter 9 PLC Operation

9.1

RUN Start
When the MICRO-EH switches to the operating state, the user program is executed in sequence from the beginning. The
user programs consist of a normal scan program and periodical scan program. In addition to these programs, there is a
subroutine area defined as a subroutine.

No.
1

2

Program classification
Normal scan program

Periodical scan program

Table 9.2 Program classification
Description
Expression
This is the program that is normally executed.
When the program has been executed to the
END instruction, execution starts again from
the beginning.
Congestion error is monitored according to the
Normal scan
congestion check time set by the user. It is
program
monitored from the beginning of the program
to the END instruction.
When it is specified to continue during
congestion (R7C0), the operation continues
END
even if a congestion error occurs.
Described in the area after the END
This program is executed periodically at
instruction.
intervals of 10 ms, 20 ms, or 40 ms.
INT0: Every 10 ms
INT1: Every 20 ms
INTn
INT2: Every 40 ms
Each execution cycle time becomes a
congestion error monitoring time.
When it is specified to continue during
congestion (R7C1), the periodical scan
program is suspended during operation.

3

Interrupt scan program

When there is an input to the input terminal
assigned to the interrupt input, the interrupt
program (INT16 to INT19) corresponding to
that input starts up.
If another interrupt caused by the same factor
occurs during the execution of the interrupt
program, a congestion error occurs. When the
operation continuation at a congestion error
(R7C2) is specified, the same interrupt scan
program is run from the beginning again.

Periodic scan
program
RTI
n = 0, 1, 2

Described in the area after the END
instruction
INTn

Interrupt scan
program
RTI
n = 16 to 19

If the counter value exceeds the preset value, a Described in the area after the END
instruction
corresponding interrupt program (INT20 to
INT27) starts up according to the counter
number.
INTn
Interrupt scan
program
RTI
n = 20 to 27

4

Subroutine

This is a program called by the CALL
instruction.

Described in the area after the END
instruction
SBn

Subroutine
program
RTS
n = 0 to 99

9-2

Chapter 9 PLC Operation

Each program is executed in the order of the priority shown in Figure 9.2. Each program is executed while monitoring
the execution time of each program area. If the monitored time exceeds the specified time, this causes a congestion error
and operation stops. When continued operation has been specified, operation continues.
The timing for scan execution is shown in Figure 9.2. System processing is performed at set periods (every 5 ms),
followed by communication system processing. *1 The maximum execution time of communication system processing
equals the duration of time until the next periodical system processing is started. If the communication system processing
ends before the maximum execution time is up, execution of scan processing is started upon completion of the
communication system processing. When the next periodical processing is executed, scanning is performed until the next
periodical processing is executed.
*1:
*2:

Communication system processing is executed every 10 ms.
The execution of scan processing starts after the communication system processing is completed.
5 ms
2]

1]

Periodic system processing

1]

2]

Communication system processing
Scan processing

Figure 9.2 Relationship between system processing and scanning
Note: Processing 1 takes extremely short period of time as compared with Processing 2. Therefore, in the following
diagram Processing 1 is omitted in order to avoid complexity.
As shown in Figure 9.3, scan processing is done while periodical scanning is performed. Periodical scanning is
processed at the point when switching to normal scan. Periodical scans are performed at intervals of every 10 ms, 20 ms,
or 40 ms. In terms of priority of execution, 10 ms scans have the highest priority. Use the refresh instruction when you
wish to perform data processing for the external I/O (X, Y) in the periodical scan.
Update processing of timer progress value is performed as a part of system processing.

10 ms
System processing
Periodic scan (10 ms)
Periodic scan (20 ms)
Periodic scan (40 ms)
Normal scan

Figure 9.3 Scan execution timing

9.1.1

Normal Scan

(1) Definition and operation
The normal scan refers to the calculations and execution of the ladder/instruction language program (excluding interrupt
programs) until the END scan processing caused by the END instruction or the execution of programs written in Pro-H.
The time required for one scan, from the beginning of a normal scan program to the END scan processing, is called the
normal scan time.

Ladder or instruction
language program
(excluding interrupt
program)
END scan processing

END scan processing
(system self-diagnosis)
Ladder or instruction
language program

END
instruction

END
instruction

Figure 9.4 Operation of normal scan

9-3

END
instruction

END
instruction

Chapter 9 PLC Operation

(2) Causes of congestion errors at normal scan
Congestion errors may occur at normal scan because of the following three possible reasons. In particular when using a
periodical scan program and an interrupt scan program together, care must be taken to create the program in such a way
that the total scan time does not exceed the congestion check time.
(a) When only a normal scan program is used
The scan time exceeded the congestion check time because the time required for one scan was too long.
Periodical system processing

Normal
scan

The periodical system interrupt
is executed by interrupts at every
10 ms regardless of whether or
not there is a periodical scan or
interrupt scan.

10 ms

END scan processing
Program execution
Normal scan time (normal scan only)
Congestion check time

The congestion check time can
be set to 20 ms to 2550 ms using
peripheral devices by the users.

Figure 9.5 Congestion error at normal scan (a)
(b)

When both a normal scan program and a periodical scan program are used
The congestion check time was exceeded because the periodical scan program was executed and the normal scan
time became longer.

Periodical Periodical system
processing
scan
Periodical program
Normal
scan

END scan processing
Program execution

10 ms

RTI
INT0

RTI
INT0

Scan time
Congestion check time
Figure 9.6 Congestion error at normal scan (b)
(c)

When both a normal scan program and an interrupt scan program are used
The congestion check time was exceeded because the interrupt scan program was executed due to an interrupt
input and the normal scan time became longer.
Periodical system processing
Interrupt analysis
Interrupt
processing
scan
Program execution
Normal
END scan processing
Program execution
scan

10 ms

Scan time
Congestion check time
Figure 9.7 Congestion error at normal scan (c)
(3) Continuation of operation after a congestion error occurred
When the special internal output bit R7C0, which specifies whether the operation should continue after a congestion
error occurred, is turned on, the normal scan executes the scan until the end regardless of the congestion check time, and
after executing the END scan processing, executes the normal scan from the beginning again.
Periodical system processing

Normal
scan

END scan processing
Program execution

10 ms

Scan time
Congestion check time

Figure 9.8 Operation when operation continuation at congestion error is set
However, note that this setting does not stop the execution of the scan when a congestion error occurred even when an
infinite loop is formed within the normal scan by the JMP instruction.

9-4

Chapter 9 PLC Operation

9.1.2

Periodical Scan

(1) Definition and operation
This scan executes interrupt programs (periodical scan programs) while the CPU is operating with a fixed cycle time (10
ms, 20 ms, or 40 ms) specified by the users.
Enter the periodical scan program to be executed between instructions INT0 and RT1 if it should be started up with a 10
ms cycle time, and between INT1 and RT1 if it should be started up with a 20 ms cycle time.
The periodical system processing is executed every 10 ms regardless of whether or not there is a periodical scan program.
Normal scan

Periodical scan

Periodical system
processing

10 ms

Scan every 10 ms
Periodical program
Periodical system processing
(including interrupt analysis
processing)

Periodical scan
Program execution

20 ms

Scan every 20 ms
Periodical program
Scan every 40 ms
Periodical program
Normal scan
Interrupt

Interrupt

Interrupt
INT1

INT1

INT1

RTI

RTI

Figure 9.9 Operation of periodical scan (in case of INT1)
(2) Causes of congestion errors at periodical scan
If there are periodical scans at every 10 ms as well as scans at every 20 ms or 40 ms, a congestion error occurs and the
scan is stopped if the periodical scan at 10 ms is started up again before all the periodical scans are completed (i.e., the
periodical system processing at INT0 to INT2 does not end within 10 ms).
Periodical system processing

Periodical scan

Normal
scan

END scan processing
Normal scan program

10 ms

10 ms

Scan every 10 ms
Periodical program
Scan every 20 ms
Periodical program
Scan every 40 ms
Periodical program

Stop

10 ms

Stop

Stop

RTI

RTI
INT0

(Example 1)
Before the periodical scan program at
every 10 ms ends, the periodical
interrupt at 10 ms is started up again.

INT0

INT0

INT1

(Example 2)
Before the periodical scan program at
every 20 ms ends, the periodical
interrupt at 10 ms is started up again.

INT1

RTI
INT2

(Example 3)
Before the periodical scan program
at every 40 ms ends, the periodical
interrupt at 10 ms is started up again.

Figure 9.10 Congestion error at periodical scan (10 ms)
Similarly, when executing with a periodical scan at every 20 ms or with a combination of periodical scans at every 20 ms
and 40 ms, a congestion error occurs if the periodical scan at 20 ms is started up again before all the periodical scans are
completed (i.e., the periodical system processing at INT1 to INT2 does not end within 20 ms). Finally, when using a
periodical scan at every 40 ms, a congestion error occurs if the periodical scan at 40 ms is started up again before all the
periodical scans are completed (i.e., the periodical system processing at INT2 does not end within 40 ms).

9-5

Chapter 9 PLC Operation

(3) Continuation of operation after a congestion error
If a congestion error occurs when the special internal output bit R7C1, which specifies whether the operation should
continue after a congestion error, is turned on, the execution of the periodical scan is stopped and the periodical scan is
executed from the beginning again. If the operation continuation specification for the normal scan is Off when this
happens, the scan stops as a congestion error at a normal scan. If the operation continuation specification for the normal
scan is On, only the periodical scan continues to be executed in the event of a periodical congestion error. Care must be
taken because the normal scan is not executed under this condition.
Periodical system processing

10 ms
R7C0 On/R7C1 On: Continue

Scan every 10 ms
Periodical program
Scan every 20 ms
Periodical program
Scan every 40 ms
Periodical program

Periodical
scan

Normal
scan

R7C0 Off/R7C1 On: Stop

INT0

END scan processing
Normal scan program

INT0

Periodical interrupt (10 ms
periodical interrupt restarts)
Congestion check time

Periodical interrupt

Figure 9.11 Operation when operation continuation at congestion error is set

9.1.3

Interrupt Scan

(1) Definition and operation
If there is an input to an input terminal assigned to an interrupt input, or there is an input to an input terminal assigned to
a counter input and the current counter value exceeds the preset value while the CPU is operating, interrupt programs
(interrupt scan) corresponding to them are started up. An interrupt scan caused by an interrupt input executes interrupt
programs from INT16 to19 to RTI instructions. An interrupt scan due to a corresponding interrupt caused by the counter
current value executes the interrupt programs from INT20 to INT27 to RTI instruction.
If an interrupt caused by another factor is input during the execution of an interrupt scan, the next interrupt scan is
started up at the point when the interrupt scan being executed is completed. Also, if two or more interrupts are input
during the execution of an interrupt scan, the interrupt scans are started up in order from the smallest INT number at the
point when the interrupt scan being executed is completed.
Periodical system
processing
Interrupt analysis processing

Normal scan

10 ms

Interrupt scan

RTI
RTI

INT16
INT17
INT20

Interrupt analysis
processing
Execution of
interrupt program

RTI

RTI
RTI

RTI

Normal scan
INT20

INT16

INT16
INT17

INT20
INT17

Figure 9.12 Operation of interrupt scan
(2) Causes of congestion errors at interrupt scan
An interrupt scan congestion error occurs during the interrupt scan processing when an interrupt of the same number is
entered again.
In addition, a normal scan congestion error occurs if interrupt inputs are frequently entered because a normal scan cannot
be executed.
Periodical system processing
Interrupt
scan

Interrupt analysis
processing
Interrupt scan

Normal
scan

END scan processing
Program execution

10 ms

The interrupt contact of INT16 is turned
on during the execution of the INT16
program.

Stop

Interrupt contact on (INT16)
Interrupt contact on (INT16)

Figure 9.13 Operation of interrupt scan

9-6

Chapter 9 PLC Operation

(3) Continuation of operation after a congestion error occurred
If an interrupt scan congestion error occurs when the special internal output bit R7C2, which specifies whether the
operation should continue after a congestion error, is turned on, the interrupt scan is started anew and the scan is
executed from the beginning again. Therefore, if the operation continuation specification of the normal scan is Off under
the conditions where interrupt inputs are frequently entered from the external source, this scan is stopped as a normal
scan congestion error. If the operation continuation specification of the normal scan is On, only interrupt scans are
continuously executed depending on the condition of the interrupt congestion error. Care must be taken because normal
scans are not executed under this condition.
Periodical system processing
Interrupt
scan
Normal
scan

Interrupt analysis
processing
Interrupt scan

R7C0 On/R7C2 On: Continue
INT16

END scan processing
Program execution

R7C0 Off/R7C2 On: Stop

Interrupt contact on
INT16

Interrupt contact on
INT16

Interrupt contact on
Congestion check time
Figure 9.14 Operation when operation continuation at congestion error is set

9-7

Chapter 9 PLC Operation

9.1.4

Relationship of Each Scan Type

When three types of scan occur at the same time, scan is executed in the order of periodical scan, then interrupt scan, and
then normal scan.
Low

Normal scan

Execution priority

High

Interrupt scan Periodical scan

10 ms

10 ms

10 ms

10 ms

Periodical scan
Interrupt scan
Normal scan
Periodical system processing
Periodical 10 ms periodical
program
scan
20 ms periodical
program
40 ms periodical
program
Interrupt
scan

Interrupt analysis
processing
Interrupt program
INT16
INT17
INT18

:
:

INT27
Normal
scan

Ladder program
END scan
Processing
Figure 9.15 Relational diagram of scan operation

Interrupt label
INT0
INT1
INT2
INT16
INT17
INT18
INT19

Table 9.3 List of interrupt label
Cause of startup
Interrupt label
Interrupt every 10 ms
INT20
Interrupt every 20 ms
INT21
Interrupt every 40 ms
INT22
Interrupt of interrupt input 1
INT23
Interrupt of interrupt input 2
INT24
Interrupt of interrupt input 3
INT25
Interrupt of interrupt input 4
INT26
INT27

9-8

Cause of startup
Counter 1 on-preset match
Counter 1 off-preset match
Counter 2 on-preset match
Counter 2 off-preset match
Counter 3 on-preset match
Counter 3 off-preset match
Counter 4 on-preset match
Counter 4 off-preset match

Chapter 9 PLC Operation

9.2

Online Change in RUN
The user programs can be modified during operation while retaining the output status as is. This is called the “program
change while running” function. To modify the user programs, special programming software or programmer is required.
Refer to the individual manuals on the operation.
Program change while running cannot be executed in the following situations. Perform this operation after satisfying the
conditions.
Table 9.4 Conditions for performing program change while running

No
1
2
3
4

5

Conditions under which
program change while
Specific situation
running cannot be performed
When READ-occupying
Other programming device is connected.
When a personal computer or panel, etc. is
connected and monitoring is being executed.
END instruction is not executed. A program that runs in an infinite loop is being
executed.
Attempted to modify a program Performing program change while running for a
that includes control
circuit containing a control instruction may cause
instructions.
operation to stop depending on the type of the
program modification error.
A password has been set.
A program protected by a password cannot be
modified.

How to satisfy the conditions
Change other programming devices to off-line.
Change the personal computer or panel to off-line.
(When monitoring, it is convenient to use the
occupancy unnecessary task code.)
Correct the program so that it does not run in an
infinite loop.
An explanation of how to perform program change
while running for a circuit that contains a control
instruction is given in the programming software
manual.
Execute after having the system administrator
remove the password.

(When the CPU is stopped, the update is executed without displaying a message confirming program change while
running.)
The MICRO-EH operation when the user program is changed in RUN is shown below.
Program change
while running
Program modification
NG

Assemble
check

Program change
Error stop
while running
(output shuts off)
including control
command

OK
Scanning stops
at END scan
Transfer to operation
execution memory

Scan resumes
Transfer to
FLASH memory

Displays that program change
while running is being performed
(programming device)

HALT time
Note
The special internal output R7EF turns on during the transfer to the FLASH memory.
If the power supply to the CPU is turned off during transferring to the FLASH memory, the programs may be
destroyed. Before the power supply to the CPU is turned off it should be confirmed that R7EF is off, or it should
not be turned off until after approximately two minutes upon the completion of program transfer.
(If the pulse is being output, turn off the power supply approximately two minutes after the pulse output stops.)

Figure 9.16 Internal processing for program change while running
Transfer to the FLASH memory
Unlike the conventional H/EH series, the MICRO-EH transfers its user program to the FLASH memory, the backup
memory, during the idle time of the CPU processing. Because of this, when the transfer to the operation execution
memory is completed, the peripheral unit displays that the transfer is complete. However, the transfer to the FLASH
memory is not completed at this stage. If the power supply to the CPU (especially CPUs without battery or CPUs whose
data maintenance guarantee time is over) is turned off at this status, a user memory error (31H) occurs when the power
supply to the main unit is turned back on. Therefore, it should be confirmed that the FLASH memory writing flag
(R7EF) is off before the power supply to the main unit is turned off, or it should not be turned off until after
approximately two minutes upon the completion of program transfer. (During pulse output, programs are not transferred
to the FLASH memory until the pulse output is stopped. If the pulse is being output, turn off the power supply
approximately two minutes after the pulse output stops.)
CPU HALT time
When performing program change while running, the program to be written to the CPU is checked if there are no errors,
then the CPU is halted temporarily (RUN → HALT).
The program of the modified area is written to the CPU while it is halted, and the CPU is set to operate (HALT → RUN)
again.
At this time, the following equation shows the approximate time the CPU is halted (it is not necessarily the maximum value).
HALT time (ms) = 45 × Program capacity (k steps) + 20
An example of a calculation of the HALT time for the MICRO-EH using the above equation is 155 ms.
9-9

Chapter 9 PLC Operation

9.3

Instantaneous Power Failure
The following shows operation when the power supply to the MICRO-EH shuts off.

AC power supply

Internal 5 V DC

Internal reset

24 V DC
RUN

ON
OFF

MICRO-EH operation

STOP status
Reset processing
Power on
2s

(1)

1.0 s
1.2 s

Instantaneous power failure
RUN status
(Starts operation)
When power supply of 100 V AC is used:
operation continues for 10 ms or less
When power supply of 200 V AC is used:
operation continues for 20 ms or less

Powering on
The MICRO-EH starts operations after a maximum of 3.5 seconds have elapsed after power-up. If the power for
input module is not completely started when the operation is commenced, the input that is supposed to be on will
be received as Off and operation proceeds, so make sure that the power for I/O module is completely turned on
before operation is commenced.
Note: When extending with a CPU larger than 14-point type, turn on the power supply for both base and
extension sides at the same time.

(2)

Instantaneous power failure actions
(a) When 100 VAC is supplied
Operation is continued during instantaneous power failures that last less than 10 ms.
(b) When 200 VAC is supplied
Operation is continued during instantaneous power failure that last less than 20 ms.
Note: Make arrangement so that the power for input module is supplied while the CPU continues its operation. If
the power is not supplied, the CPU will perform operation assuming the input data as Off. Exercise caution
especially when performing operation that changes the contents of the power failure memory using input
signals, since the contents of the power failure memory may have been altered unintentionally due to an
instantaneous power failure.

9-10

Chapter 9 PLC Operation

9.4

Operation Parameter
The settings of “parameters,” which are required to perform tasks such as creating programs, transferring programs to the
CPU, are performed. The setting contents are explained below.

Item
1

Function
Password

{

2

CPU type

{

3

Memory assignment

{

4

Operating parameters {

5

I/O assignment

6

Program name

7

Power failure
memory*

Description
Register a password to a program in the four-digit
hexadecimal format. The program with a password will
not allow program operation nor changes unless the
correct password is entered, so please exercise caution.
Note: The user will not be able to reset the password when
it is forgotten, so exercise extreme caution when accessing
a password.
Password is not set at the time of shipment.
Set the CPU name used to perform programming.
Set the CPU type to “H-302” for MICRO-EH.
Set the memory capacity.
Set the memory type to “RAM-04H” for MICRO-EH.

Operation control
Perform these settings when controlling the running and
stopping of the operation using a specific I/O. If this is not
set, operation will start automatically by setting the RUN
switch (or the RUN terminal) to “RUN.”
{ Congestion check time
Set this when you wish to stop the CPU operation when
the set maximum processing time for a normal scan is
exceeded. When this setting is not made, this is
automatically set to initial value 100 ms.
{ Operating mode at problem occurrence
Set this when you wish to continue the CPU operation
when the error generated by the CPU is minor.
{ This sets the I/O assignment information of the CPU.
It is convenient to use the MICRO-EH's I/O assignment
copy function.
Set the program name using a maximum of 16 alphanumeric
characters. The set program names can be written into the CPU
along with the program, which will facilitate the program
verification and management.
This sets the range in which the data in a specified area in the
CPU is to be stored upon CPU power off or when commencing
RUN. Settings for R, WR, WM, TD, DIF, DFN are possible.

When to use the function
Use to protect the confidentiality
of the programs.

Always perform these settings
when programming.
Always perform these settings
when programming.
The number of program steps
that can be input is 3072.
Set according to the user's
operation purposes.

Always perform these settings
when programming.
Set this to facilitate program
verification and management.
Set this when there is data you
wish to maintain when operation
is stopped.
The special internal output data
is unconditionally saved for
power failure by the I/O number.

*: 10-point type CPU does not have the power failure memory function. Even though it is possible to set a power
failure memory area from a peripheral unit, the values that are stored here will not be persistent; do not set this
function.
Moreover, 14-point type CPU can maintain power failure memory only up to 72 hours. Note that non-persistent
values will be stored if the power supply to the main unit is not turned on after these hours have passed. 23- and 28point CPUs without a battery can maintain power failure memory for only up to 30 minutes. The data can be retained
for approximately two months by installing a battery.

9-11

Chapter 9 PLC Operation

9.5

9.6

Test Operation
(1)

Verification of interlock
Verify performance of the interlock in case of unexpected incidents.
Create ladders such as an emergency stop circuit, protective circuit and interlock circuit outside the program
controller. For the relay output module, however, do not control the relay drive power supply to interlock with the
external loads.

(2)

Operation without load
Before actually operating the loads in the system, test the program only and verify its operation.
Always perform this if there may damage the other party's equipment due to unexpected operation caused by
program errors or other problems.

(3)

Operation using actual loads
Supply power to the external input and external output to verify the actions.

Forced Set/Reset
It is possible to forcefully set/reset data to specified I/O points using peripheral units, regardless of whether the CPU is
operating or stopped. Refer to the manuals for the peripheral units for how to set/reset forcefully.
Please note that for the special internal outputs related to operation modes, forcefully setting/resetting only the
corresponding special internal output does not enforce the change in the operation mode. For example, when the
frequency of a pulse output should be changed, the frequency will not be changed by just setting the desirable frequency
in WRF072, the special internal output for setting pulse frequency. See Chapter 8, where the setting of the PI/O function
is explained in detail.

9.7

Forced Output
It is possible to use peripheral units to specify single outputs for forced output while the CPU is stopped. Refer to the
manuals for the peripheral units for how to output forcefully.
Table 9.5 lists the differences between the forced set/reset and forced output.
Table 9.5 Differences between forced set/reset and forced output
Forced set/reset
Forced output
I/O types that can be used
X,Y,M,R,TD,SS,CU, CT,WX,WY,
Y,WY,DY
WM,WR, TC,DX,DY,DM,DR
CPU status in which the
During RUN and being stopped
Being stopped
function can be used
Function
Changes the data in the area that stores Turns only one specified external
output (one point or one data) on/off
the CPU calculation result to a
while the CPU is being stopped.
specified value.
All other outputs are turned off.
For checking the wiring for external
Application
For checking when setting/changing
output.
power failure memory area data at
troubles.
Note:
1] The actual external output status and the external output information stored internally in the CPU may be different
when the CPU is stopped. At this point, if a forced set/reset is performed to the external output, the external output
information stored internally in the CPU is output from other external output. Thus, the forced output function can
be used in order to check the wiring for the external output.
2] Only I/O points assigned by the I/O assignment written in the CPU can be set for external input and external output
I/O numbers.

9-12

Chapter 10 PLC Installation, Mounting, Wiring

Chapter 10 PLC Installation, Mounting, Wiring
10.1 Installation
(1)

(2)

Installation location and environment
(a) When installing the MICRO-EH, use the unit under the environment within the general specification.
(b) Mount the PLC onto a metal plate.
(c) Install the PLC in a suitable enclosure such as a cabinet that opens with a key, tool, etc.
Installing the unit
(a) Precautions when installing the unit
1] When installing the base unit, fix it securely with screws in 2 places (M4, length 20 mm or more) or DIN
rail.
2] To use the unit within the ambient temperature range,
a) Allow ample space for air circulation. (50 mm or more at top and bottom, 10 mm or more to the left
and right)
b) Avoid installing the unit directly above equipment that generates significant heat (heater, transformer,
large-capacity resistance, etc.)
c) When the ambient temperature reaches more than 55 °C, install a fan or cooler to lower the
temperature to below 55 °C.
3] Avoid mounting inside a panel where high-voltage equipment is installed.
4] Install 200 mm or more away from high-voltage lines or power lines.
5] Avoid upside down, vertical or horizontal mounting.

L1
50 mm or more
10 mm or more

10 mm or more

L2

PLC
50 mm or more
50 mm or more
10 mm or more

10 mm or more

PLC

Dimensional table
Unit
10-point
14-point (basic, exp.)
23, 28-point (basic, exp.)

50 mm or more

Wiring duct

Figure 10.1 Mounting clearances
(b)

Figure 10.2 External dimensions

L1
65
85
140

L2
70
80
80
Unit: mm

Mounting to a DIN rail
Attaching to a DIN rail
1] Hook the claw (top side) attached to the back of
the unit to the DIN rail.
2] Press the unit into the DIN rail until it clicks.
1]

Note: After installation, check to make sure the base
unit is securely fixed.

2]

10-1

Chapter 10 PLC Installation, Mounting, Wiring

Securing the unit
Secure the unit by installing DIN rail fixing brackets
from both sides. (The product may move out of place
if not secured with the fixing brackets.)

DIN rail attachment mounting levers

Removing the unit from the DIN rail
While lowering the DIN rail attachment mounting
lever 1], lift the unit upward to remove as shown by
2].

DIN rail attachment mounting levers

2]

1]

10-2

Chapter 10 PLC Installation, Mounting, Wiring

10.2 Wiring
(1)

Separation of the power system
The power supplies include power for the MICRO-EH main unit/power for the I/O signals/power for general
equipment. These power supplies should be wired from separate systems as much as possible.
When these power supplies are supplied from one main power source, separate the wiring with a transformer or
similar device, so that each power supply is a separate system.
Main power supply
100 V AC
to
240 V AC

NF
Power for the PLC unit
Transformer
NF: noise filter
NF
Power for I/O signals
Transformer
NF
Power for general equipment

Figure 10.3 Example of power system diagram
(2)

Regarding fail safe
1] Construct an interlock circuit external to the MICRO-EH.
When the MICRO-EH’s power is turned on or off, the inputs/outputs of the MICRO-EH may not temporarily
operate normally due to the time lag of the power supply of the MICRO-EH’s main unit, the external power
supply of the MICRO-EH’s expansion unit, and the external power supply (especially DC power supply) for
the MICRO-EH’s I/O signals, as well as the difference in their startup times.
Thus, either turn on the power to the expansion unit first, or turn on the power to both the base unit and
expansion unit simultaneously. Also, be sure to turn on the external power supply (especially DC power supply)
for the MICRO-EH’s I/O signals before turning on the MICRO-EH.
Additionally, a problem in the external power supply or a malfunction in the MICRO-EH’s main unit may
cause abnormal operations. To prevent such problems from causing abnormal operations of the entire system,
and from the viewpoint of creating a fail-safe mechanism, construct such circuits as an emergency stop circuit,
protective circuit and interlock circuit external to the MICRO-EH for the sections that may result in mechanical
damage or accident if abnormal operations occur.
2] Install a lightning arrester
To prevent damage to the equipment as a result of being struck by lightning, it is recommended that a lightning
arrester be installed for each MICRO-EH’s power supply circuit.
The MICRO-EH detects a power failure from a voltage drop in the internal 5 VDC power supply. For this
reason, when the load in the unit's internal 5 VDC system is light, 5 VDC is retained for a long period of time
and operations may continue for more than 100 ms. Thus, when an AC input unit is used, an off-delay timer for
coordinating with the internal 5 VDC system is required to avoid erroneous input since the AC input signal
turns off more quickly than the internal 5 VDC system.

10-3

Chapter 10 PLC Installation, Mounting, Wiring

(3)

Wiring to the power module
(a) For power supply wiring, use a cable of 2
mm2 or more to prevent a voltage drop from
occurring.
(b) For the function ground terminal (PE
terminal), use a cable of 2 mm2 or more and
provide Class D grounding (100 Ω or less).
The appropriate length for the ground cable
is within 20 m.
1] Instrumentation panel and relay panel
grounding may be shared.
2] Avoid grounding shared with equipment
that may generate noise such as highfrequency heating furnace, large-scaled
power panel (several kW or more),
thyristor exchanger, electric welders, etc.
3] Connect a noise filter (NF) to the power
cable.
(c) Tighten the terminal screws within the torque
range as shown below.

Power supply
for the sensor

100 V AC to
240 V AC

Power leakage
breaker

Shielded
insulated
transformer

Noise
filter

Figure 10.4 Power supply wiring diagram

Unit

Screw

10-point
14, 23, 28-point,
expansion

M2.5

Clamping
torque
0.3 to 0.4 Nxm

M3.0

0.5 to 0.6 Nxm

(d) Use the same power supply system for the
basic and expansion units.

(4)

Wiring cable for I/O signals
6

6

10-4

Tighten each terminal screw using a torque of the
specified torque range.
When using a crimp terminal, use one with an
outer diameter of 6 mm or less.
Use only up to two crimp terminals in the same
terminal. Avoid clamping down more than three
at the same time.
Only one piece of cable can be wired per
terminal if the cable type is between AWG14 and
AWG22 (cable thickness ranging between 2.1
mm2 and 0.36 mm2), but two pieces can be wired
if the cable type is between AWG16 and AWG22
(between 1.3 mm2 and 0.36 mm2).

Chapter 10 PLC Installation, Mounting, Wiring

(5)

Wiring to the input terminals
DC input

AC input

Current output type
Proximity switch

24 V DC
①
1]

24+
0V

3]
2]

0]

4]
C0

6]
5]

C1

0

7]

③
②

④
C0

⑥
⑤

C1
⑦

Example of 14-point type
Example of 14-point type

Figure 10.5 Input wiring
(a)

DC input
1] When all input terminals (X0, X1, ...) and the common terminal (C) are loaded with 24 VDC, the input
becomes ON status, and approximately 7.5 mA of current flows to the external input contacts.
2] For sensors such as a proximity switch or photoelectric switch, current output type (transistor open
collector) can be connected directly. For voltage-output-type sensors, connect them to the input terminal
after first going through the transistor.
3] Take measures to prevent faulty contact in a strong electric contact.
Strong electric
contact

The current that flows to a contact when external contacts
are closed is approximately 7.5 mA. If a strong electric
contact must be used, add resistance as shown in the diagram
at left and supply sufficient current to the contact to prevent
a faulty contact.

1]
Approx. 50 mA
24 V DC

3W
560 Ω
C
DC input module

4] Limit the wiring length within 30 m.
5] Multiple number of common terminals located at each input section are not connected internally. Make
the connections externally as needed.
6] There are no RUN and STOP switches for the 10-point type. Connect with the RUN input terminal
according to the above connection procedure so that RUN and STOP can be performed. Operation cannot
be performed unless this connection is done.
(b) AC input
In case of AC input module, input voltage may exist if input wiring is long although no device drives. This
phenomenon is caused from leakage current due to floating capacitance between lines.
External
device

AC input
module

The countermeasures are [1] or [2] as follows. This voltage due to electrostatic coupling must be half of max.
OFF voltage or less.
[1] To install dummy resistor in parallel so that impedance of input module is lower.
[2] To replace power supply at drive (external device) side.
Dummy resistor

External
device

AC input
module

10-5

Chapter 10 PLC Installation, Mounting, Wiring

(6)

Wiring to the output terminals
Relay output
EH-*XXDR**

Item
External
wiring

POW
POW

0]

1]
C0

2]
C1

4]
3]

C2

POW

5]

POW

0]

1]
C0

FUSE

Diode

Figure 10.6 Relay output wiring

External
wiring

Transistor output
(sink type)
(EH-*XXDT**)
POW

0]

POW

NC
1]

3]

2]

5]
4]

C
V

FUSE

Diode

Figure 10.7 Transistor output wiring
Transistor output
(source type)
(EH- XXDTP**)

Item
External
wiring

POW
POW

0]

NC
1]

2]

3]

5]
4]

C
V

FUSE

Diode

Figure 10.8 Transistor output wiring

10-6

4]
3]

C2
5]

FUSE

Surge killer

Item

2]
C1

Chapter 10 PLC Installation, Mounting, Wiring

(a)

Wiring to the relay output terminals
1] Life of relay contacts
Life curve of relay contacts
Figure 1 Life characteristics (125 V AC)

1000

Switching life (10,000 times)

500
AC 125 V cos φ =1

100

AC 125 V cos φ =0.7

50

Life of the contact is almost in squared
reverse proportion to the current, so be aware
that interrupting rush current or directly
driving the condenser load will drastically
reduce the life of the relay.
When switching is made with high
frequency, use a transistor output module.

20
10

1

AC 125 V cos φ =0.4

0

1

2

4
5
3
6
Contact switching current (A)

Figure 2 Life characteristics (250 V AC)

1000

Switching life (10,000 times)

500

100

AC 250 V cos φ =1

50

AC 250 V cos φ =0.7

20
10
AC 250 V cos φ =0.4

1

0

1

2

4
5
3
6
Contact switching current (A)

Figure 3 Life characteristics

1000

Switching life (10,000 times)

500
DC 30 V L/R=1 ms

100
50

DV 30 V L/R=7 ms

20
10

1

DC 30 V L/R=15 ms
0

1

2

3
6
4
5
Contact switching current (A)

2] Surge killer
For inductive load, connect a surge killer (condenser 0.1 µF, + resistance of approx. 100 Ω) in parallel to
the load. Also, for DC load, connect a flywheel diode.
3] Fuse
A built-in fuse is not used in this module. Install a 6 A fuse in the common to prevent the external wiring
from burning out.
For the independent contact output section, install a 2A fuse per circuit.
(b)

Wiring to the transistor output terminals
4] Flywheel diode
For inductive load, connect a flywheel diode in parallel.
5] V and C terminals
Always connect a V terminal and C (common) terminal. If the module is used without connecting these
terminals, the internal flywheel diode may not function and the module may malfunction or break down.
6] Fuse
There is no built-in fuse to prevent external wiring burning. Therefore, it is recommended that a fuse be
installed externally to prevent the external wiring from burning out. (This does not protect the internal
transistor elements.) If the external load is short-circuited, please contact us for repair.

10-7

Chapter 10 PLC Installation, Mounting, Wiring

(7)

Wiring to the unit terminals
Wiring for the power supply
2

Shield insulation
transformer
AC power supply

Use a 2 mm cable and twist it. Leave a distance of 100
mm or more from the signal cable and 200 mm or more
from the power line.

NF

Connection of a noise
filter is recommended.

Expansion cable
Always segregate power
line, I/O signal and
power supply cable
Ground wiring
2

Use a cable 2 mm or
more for the wiring.

I/O signal cable
Leave a distance of at least
200 mm from the power
line and do not run the wire
next to the power cable.

Class D grounding

Metal plate
Perform class D grounding

Outer hull (Cabinet)
Perform class D grounding

Figure 10.9 Example of wiring
(8)

Wiring to the analog I/O terminals
• Do not apply the voltage that exceeds the rated input voltage to the analog input terminals. In addition, do not
allow the current that exceeds the rated input current to flow into the analog input terminals. If a power supply
that is different from the specified power supply is connected, the product may be damaged or burned out.
• For the channels that do not use the analog input terminals, be sure to short-circuit the analog input terminals
before using such channels.
• For the external wiring to the analog I/O terminals, use a shielded cable and make routing different from other
power lines with different voltages and signal lines. In addition, ground one end of the shield cable. However,
grounding both ends or open ends may have better effect than grounding one end of the shield cable, depending
on the noise environment in which the equipment is used. Use the appropriate grounding method accordingly.
• Place AC power supply lines, signal lines and data lines in separate pipes.
• Wire signal lines and data lines as close as possible to a grounded surface such as a cabinet and metal bar.

10-8

Chapter 11 Communication Specifications

Chapter 11 Communication Specifications
11.1 Port function
Port function of MICRO-EH is shown in Table 11.1.
Table 11.1 Communication port specification

General purpose
port

Without St. No.
(1:1)

PC, modem, HMI

PC,
etc.

PC,
etc.

device, PC, HMI

Trans.
procedure 2

Transmission
procedure 1

Connected devices

RS-422/485
Dedicated port

Programming device,

Transmission procedure 1

Programming

Transmission
procedure 2

General purpose
port

RS-232C
Dedicated port

Port type

With
St. No.
(1:N)

Without
St. No.
(1:1)

With
St. No.
(1:N)

PC, etc.

PC, etc.

PC,
etc.

PC,
etc.

Port 1

All modules

9

9

9*

-

-

-

-

-

Port 2

23,28 pts. module

-

-

-

9

9

9

9

9*

* Supported by software version 1.30 (WRF051=H0130) or newer.

11.2 Port 1
Specification of port 1 is shown below.
Table 11.1 Port 1 specification
Item
Communication

Specification

Modem mode
General purpose port
2400,
4800,
9600,
19.2
k,
38.4k,
300,
600,
1200, 2400, 4800,
speed*
4800, 9600, 19.2k, 38.4k bps
57.6 k bps
9600, 19.2k, 38.4k, 57.6k bps
Communication system Half duplex
Synchronization
Asynchronous
Startup system
One-sided startup using the host side command
Transmission system
Serial transmission (bit serial transmission)
Transmission code
ASCII
Configured by user
Transmission code
configuration

Dedicated (programming) port

ASCII: 7-bit data, 1 start, 1 stop, even parity
Start bit (1 bit)

Configured by user

Parity bit (1 bit)
Stop bit (1 bit)

0

2

1

2

2

6

P

Data (7 bits) (even parity)

Data sending sequence Sent out from the lowest bit
Vertical parity check, checksum, overrun check, framing check
Error control
Transmission unit

Message unit (variable length)

Max. message length

1,024 bytes (including control characters)

Control procedure

H-series dedicated procedure (hi-protocol)
Standard protocol (transmission control procedure 1),

Interface

Simplified protocol (transmission control procedure 2)
RS-232C (maximum cable length: 15 m)

Connector

8P modular connector (RJ45)

Configured by user

* : Handy programmers are not available with MICRO-EH.
* : GPCL01H is not available with 10 points type as communication speed is fixed as 4,800 bps.
* : If host sends NAK command, the next message must be sent after 10 ms interval.

11-1

Chapter 11 Communication Specifications

(1)

Port 1 settings

Port 1 is configured by combination of DIP switch and special register (WRF01A).
DIP switch can be set when cable is not connected (DR signal is off). Switch configuration is set at cable connected
(DR is high).
Value in WRF01A is saved in FLASH memory when writing flag (R7F6) is turned on. If saved in FLASH memory,
it is not necessary to set again at the next power up.
[ Caution ] If transmission procedure 2 is configured and saved in FLASH memory once, peripheral
device/application which supports procedure 1 such as LADDER EDITOR can not be connected.
Port type
ON

38.4 kbps
19.2 kbps
9600 bps
4800 bps
4800 bps
9600 bps
Dedicated
19.2 k bps
port via
38.4 k bps
modem
57.6 k bps
2400 bps
General purpose port
Dedicated
port

1 2 3 4

1
ON
ON
off
off

DIP switch
2
3
off
ON
off
off
off
ON
off
off

4
off
off
off
off

WRF01A

Remarks

H0000 : Transmission procedure 1
H8000 : Transmission procedure 2

Default
H0000 : Prcd. 1 / H8000 : Prcd. 2
H0100 : Prcd. 1 / H8100 : Prcd. 2
H0*** :
H0200 : Prcd. 1 / H8200 : Prcd. 2
Procedure 1
off
ON
off
off
H8*** :
H0300 : Prcd. 1 / H8300 : Prcd. 2
Procedure 2
H0400 : Prcd. 1 / H8400 : Prcd. 2
H0500 : Prcd. 1 / H8500 : Prcd. 2
Port switching by FUN5 command, Baud rate by TRNS/RECV command

* Due to no DIP switch equipped, 10 points type does not support modem function.
* +12V is supplied from pin 4 if DIP switch is ON.
* General purpose port is supported by software version 0130 (WRF051=H0130) or newer.

(2) Port 1 hardware
The circuit diagram of port 1 and the signal list are shown in Figure 11.2 and Table 11.3 respectively.
5V

1] SG1
2] VCC

Micro processor

ER1
DCD1
TX1
RX1
DR1
RS1

1]
2]
3]
4]
5]
6]
7]
8]

3] DTR1
4] CD1
5] SD1
6] RD1
7] DR1
8] RS1

12 V

Figure 11.2 Circuit diagram and pin numbers for port 1
Table 11.3 List of port 1 signals
Pin No.
1]
2]
3]
4]
5]
6]
7]
8]

Signal
abbreviation
SG1
VCC
DTR1 (ER)
CD1 (DCD)
SD1 (TXD)
RD1 (RXD)
DR1 (DSR)
RS1 (RTS)

Direction
CPU
Host

Meaning
Signal ground
5 V DC is supplied. (Protective fuse is connected.)
Communication enabled signal. When it is high, communication is possible.
12V is output when DIP switch 1 is on.
Data sent by the CPU
Data received by the CPU
Peripheral units connected signal. When it is high, peripheral device is connected.
Transmission request signal. When it is high, CPU is ready to receive data.

11-2

Chapter 11 Communication Specifications

11.3 Port 2
The specifications of port 2 are listed in Table 11.4. 1:n station communication by the high protocol is possible with port 2.
By creating and including a control procedure based on the high protocol on the personal computer which will become the
host, it becomes possible to control a maximum of 32 stations from one host. The systems can thus be configured in several
ways.
Table 11.4 Port 2 specifications
Item
Dedicated (programming) port
4800, 9600, 19.2 k, 38.4 k bps

Communication speed
Communication system
Synchronization
Startup system
Transmission system
Transmission code,
configuration
Transmission code outgoing
sequence
Error control
Transmission unit
Maximum message length
Control procedure

Interface
Connector

Specification
General purpose port
300, 600, 1200, 2400, 4800, 9600, 19.2 k,
38.4 k, 57.6 k bps

Half duplex

Asynchronous
One-sided startup using the host side command
Serial transmission (bit serial transmission)
ASCII: 7-bit data, 1 start, 1 stop, even parity

Configured by user

Sent out from the lowest bit in character units
Vertical parity check, checksum, overrun check, framing check
Message unit (variable length)
503 bytes (including control characters)
1,024 bytes
Note: 505 bytes when the station number is used.
H-series dedicated procedure (h-protocol)
Configured by user
Standard protocol (transmission control procedure 1),
Simplified protocol (transmission control procedure 2)
RS-422/485 (maximum cable length: 250 m)
CPU side: 15-pin D-sub
Cable side: a cable equivalent to 17JE-23150-02(D8B) (DDK Co., Ltd.) is recommended (D-SUB
fitting screw M3 × 0.5)

(1) Setting port 2
Port 2 is configured by special register WRF03D. The settings can be changed even when port 2 is communicating. The
highest bit (b15) of WRF03D is setting bit.
If station number mode is used, make sure to set the station number from 0 to 31 in BCD code.
Value in WRF03D is saved in FLASH memory when writing flag (R7F6) is turned on. If saved in FLASH memory, it is
not necessary to set again at the next power up.
(Example) Transmission control procedure 2, communication speed 19.2 kbps, and station number 28.
Î WRF03D = HE228 After the setting is completed, WRF03D is changed to H6228. (b15 cleared)
Bit:
WRF03D:
Initial value:

15
a
0
Field
a

b
c
d

e

14
b
0

13
12 11
10
9
8
7
6
5
c
0
d
0
0
0
0
0
0
0
0
0
Figure 11.3 Special internal output for setting port 2

Setting value
0

Content
Setting completed

1

Setting change request

0
1
0
1
0
1
2
3
Other than above
0 ~ 31

Transmission control procedure 1
Transmission control procedure 2
Without station number
With station number
Transmission speed

Station number *

4
e
0

3

2

1

0

0

0

0

0

Note
After the setting is completed, the
system changes this bit to 0.
Set this bit to 1 when changing the
setting.

4800 bps
9600 bps
19.2 kbps
38.4 kbps
4800 bps

Setting of bits 8 to 12

H0000
H0001
H0010
H0011

Set by BCD.

* Communication speed of general purpose port is configured in TRNS/RECV command. Value in WRF03D
is ignored.

11-3

Chapter 11 Communication Specifications

(2) 1:n station communication on RS-485
When station number mode is used on RS-485, termination command (NAK FF) from host/PC can conflict with reply
from CPU, and CPU can fail to receive this command. Pay attention to this possibility at using this command.
(3) Port 2 hardware
The circuit diagram of port 2 and the signal list are shown in Figure 11.4 and Table 11.6 respectively.
7] SG
5] VCC

Micro processor

VCC

15]

14] RSP

RS2

14]

6] RSN

13]

15] CSN

CS2

12]

8] CSP

TX2
RX2

13] SDP

11]

12] SDN

10]

10] RDN

9]

8]
7]
6]
5]
4]
3]
2]
1]

11] RDP
9] RT

Figure 11.4 Circuit diagram and pin numbers for port 2
Table 11.6 List of port 2 signals
Pin No.
1]
2]
3]
4]
5]
6]
7]
8]
9]
10]
11]
12]
13]
14]
15]

Signal
abbreviation
NC
NC
NC
NC
Vcc
RSN
SG
CSP
RT
RDN
RDP
SDN
SDP
RSP
CSN

Direction
CPU
Host

Meaning
Not used
Not used
Not used
Not used
5 V DC is supplied.
Transmission request signal. When it is high low, CPU is ready to receive data..
Signal ground
Receive enabled signal. When it is high, connected device is ready to receive data.
Terminating resistor (120Ω). Connect to pin 10 if necessary.
Data received by the CPU Data received by the CPU +
Data sent by the CPU Data sent by the CPU +
Transmission request signal. When it is high level, CPU is ready to receive data.
Receive enabled signal. When it is low, connected device is ready to receive data.

11.4 General purpose port (Port 1,2)
General purpose port can be configured either port 1 or port 2 by FUN 5 command in user program. General purpose port
enables serial communication to devices like bar code reader by TRNS/RECV command in user program.
Even if configured, the port works as general purpose port only CPU is in RUN status. Port is changed back to dedicated
port when CPU is in STOP status.
* General purpose port is supported by software version 1.30 (WRF051=H0130) or newer.

CPU in STOP
General purpose port

Dedicated port

11-4

Switching
automatically

CPU in RUN
General purpose port

Chapter 11 Communication Specifications

11.5 Modem Control Function
The 14-point or higher MICRO-EH is equipped with a modem control function. The modem control function can be
operated using task codes. To use this function, it is necessary to set No.2 of the DIP SW.
For details on the communication specifications, see Table 11.1, “Specifications of port 1.”
* The 10-point type CPU does not have this function.
Connecting two operating modems may be difficult if there is a significant difference between them in terms of
communication speeds. Thus, use the models having the same communication speed.

11.5.1 Configuration

Personal
computer

Modem

Modem

MICRO-EH
RS-232C
(MAX 57.6 kbps)

Public line

Figure 11.5 Modem connection configuration diagram
Table 11.7 List of port 1 signals when a modem is connected
Signal
Direction
Meaning
abbreviation
CPU
Host
SG1
Signal ground
CD1
Carrier receive in-progress notification signal
Connected to CD in the modem.
ER1
Communication enabled signal of the terminal
ER2
Not used
SD1
Data sent by the CPU
Connected to SD in the modem.
RD1
Data received by the CPU
Connected to RD in the modem.
DR1
Communication enabled signal of the modem
Connected to DR in the modem.
RS1
Transmission request signal
Connected to RS in the modem.

Pin No.
1]
2]
3]
4]
5]
6]
7]
8]

11.5.2 AT Commands
The AT commands are used to make various modem settings, and are set from the host computer. The MICRO-EH issues
the AT commands automatically for initial setting. Other than this, the AT commands are not used.
Refer to instruction manual or other documents furnished by modem manufacturers for details on the AT commands.
In AT commands, an instruction sent to the modem from the host is called a “command,” and the character string in
response to the “command” returned to the host from the modem is called a “result code.”
AT commands always begin with the character string “AT,” and a return code is input at the end of the command. However,
A/ is excluded. The command that follows the “AT” can have multiple inputs in a single line.
Example)
A

T

&C

AT commands

(1)

1

&S

CD signals: Follows the
carrier signals generated
by the opposite device

0

DR signals: Always On

P

2

CR

20 pps (pulse setting)

Format
1]
AT command format
A

2]

command parameter command parameter · · · ·

T

Result code format
CR

LF

CR

Result code (word)

Result code (number)

CR

LF

11-5

LF

CR

LF

LF

Chapter 11 Communication Specifications

(2)

List of commands (extract)
1]
AT commands
Command
Function overview
AT
Automatically recognizes data format
A/
Re-executes the response directly preceding
ATA
Forced reception
ATDmm
Dial
ATEn
Command echo (echo back a text string entered to modem)
ATHn
ATPn
ATQn
ATT
ATSn = X
ATVn
AT&Cn
AT&Dn

AT&Sn
AT&Rn

2]

3]

Example



0: No
1: Yes

Line ON/OFF

0: On hook (disconnect)
1: Off hook
Pulse (dial) setting
0, 1: 10 pps
2 : 20 pps
Result code setting 0: Yes 1: No
Tone (push) setting
Sets S register value.
Result code display format
0: Number
1: Word
CD signal control
0: Always on
1: Depends on the carrier of counter-party modem
ER signal control
0: Always on
2: Turning from on to off during communication disconnects line
3: Turning from on to off resets the software
DR signal
0: Always on
1: Depends on sequence
2: Depends on CD signal
RI(CI) signal control
0: Turns on from calling start until communication begins
1: Turns on from calling start until communication ends
2: Turns on/off in synchronization with the call signal

S register
S register
Set value
S0
0 no automatic
reception
1 to 255
S2
0 to 127
(43 [+] )
S3
0 to 127
(13 [CR] )
S4
0 to 127
(10 [LF] )
Result codes
Number format
0
1
2
3
4
5
6
7
8
10
11
12
13

Function
Setting for automatic reception/reception ring count
Escape code setting
CR code setting
LF code setting

Word format
OK
CONNECT
RING
NO CARRIER
ERROR
CONNECT 1200
NO DIAL TONE
BUSY
NO ANSWER
CONNECT 2400
CONNECT 4800
CONNECT 9600
CONNECT 14400

Meaning
Normal execution
Connection complete
Reception detected
Line disconnected
Command error
1200 bps connection
Cannot hear dial tone
Busy signal detected
No tone heard
2400 bps connection
4800 bps connection
9600 bps connection
14400 bps connection

11-6

ATD12345678
ATE0
ATH0
ATH1
ATP0, ATP1
ATP2
ATQ0
ATT
ATS0 = 0
ATV0
ATV1
AT&C0
AT&C1
AT&D0
AT&D2
AT&D3
AT&S0
AT&S1
AT&S2
AT&R0
AT&R1
AT&R2

Chapter 11 Communication Specifications

(3) Sequence
An example of a communication sequence using the Omron-made modem ME3314A is given below.
(a)

Reception sequence
2]
0

DR on

Modem

CR

1]
ATE0Q0V0&C1&S0

MICRO-EH
ER on
2

CR LF

Initial setting (Note 1)

CR

2

Waiting for reception

CR

2

CR

Modem
MICRO-EH

3]
Forced connection when three rings are detected
1

Modem

CR

4]

MICRO-EH

ATA

Port communication begins from here

CR LF
Reception complete

1]
2]
3]
4]

The PLC issues the AT command that performs the initial setting of the modem.
If initial setting is OK, the modem returns “0.”
The PLC detects the result code “2” three times while in the reception wait state.
It connects the modem.

(b)

Disconnect sequence
3

Modem
MICRO-EH

CR

Port communication ends

1]
Line disconnected

1]

The PLC disconnects the line when the result code “3” is returned from the modem.

Note 1: Since the modem initial setup sets only minimal items from the MICRO-EH side, connect a personal computer
and perform necessary settings before making the connection. (Set the DR signal to always on.) Moreover, do not
change the following initial settings.
Contents of the initial settings
Command echo:
Result code:
Display format of result code:

None
Yes
Numerical format

Note 2: The modem timeout (WRF03C) stored in the special internal output refers to the time from data transmission
from the MICRO-EH to the data reception from the opposite station (STX, ENQ, NAK). Normally, this special
internal output should be set to “0000” (default) or “H8000” (no timeout). Set the timeout only when it is
especially necessary to monitor the reception time from the opposite station. When a timeout is detected, the
MICRO-EH cuts off the line. When setting the timeout, set the time in the ** part of H80. The unit is * seconds
(hexadecimal).
Note 3: Before actually cutting off the line, issue the task code of the line cut off request (HIC--see Appendix 2, “Task
code list” for details) from the host side.

11-7

Chapter 11 Communication Specifications

11.6 Connecting to the Ports
The following shows some examples of connections between port 1 and 2 and peripheral units. When creating a
connection cable, check it thoroughly in advance according to what the purpose of its use is.

11.6.1 Port 1
Port 1 of the MICRO-EH is a communication port that uses the RS-232C protocol as interface. It is also a dedicated port
with which to perform communication by the H series dedicated procedure (high protocol). Table 11.8 lists the types of
peripheral units and cables that can be connected to port 1.

Peripheral unit

Table 11.8 Peripheral unit connection configuration
Cable

CPU type
28-/23-point type

EH-RS05
GPCL01H
(Ladder Editor, HI-Ladder)

GPCB02H

14-point type

Ladder Editor (DOS version)

EH-RS05
PCCB02H

WPCB02H (PC9800)
Ladder Editor for Windows®

EH-RS05

28-/23-point type

WVCB02H
(DOS/V system)
14-point type
EH-VCB02 (DOS/V system)

EH-RS05
WVCB02H

10-point type

Pro-H

EH-VCB02

*1:
*2:

Set the DIP switches to 19.2 kbps when connecting to a GPCL01H.
Adjust the DIP switch settings to the speed with which to communicate when connecting a LADDER EDITOR or
Pro-H. (The speed is fixed at 4800 bps for 10-point type CPU.)

11-8

Chapter 11 Communication Specifications

11.6.2 Port 2
Port 2 of the MICRO-EH is a communication port that uses either the RS-422 or RS-485 protocol as interface. It is also a
dedicated port with which to perform communication by the H series dedicated procedure (high protocol), which allows
1:n station communication. Figure 11.6 and 11.7 show examples of port 2 connections for 1:n station communication.
Moreover, the connection for communicating 1:1 is performed by connecting only the first CPU in the figure below.
(1)

In case of RS-422
RD (-)
RD (+)
SD (-)
SD (+)

(13) SDP

Host

(13) SDP
(12) SDN
(11) RDP
(10) RDN

(13) SDP
(12) SDN
(11) RDP
(10) RDN

(12) SDN
(11) RDP
(10) RDN

MICRO-EH
(1st CPU)

MICRO-EH
(2nd CPU)

MICRO-EH
(32nd CPU)

Figure 11.6 Connection for 1:n station communication by RS-422
(2)

In case of RS-485
MICRO-EH
(1st CPU)

MICRO-EH
(32nd CPU)

Host
(13) SDP

RD (-)
RD (+)
SD (-)
SD (+)

(13) SDP
(12) SDN

(11) RDP

(10) RDN

(12) SDN
(11) RDP

Twisted pair cable
A
B
Relay terminal block

Relay terminal block

Relay terminal block

Figure 11.7 Connection for 1:n station communication by RS-485

11-9

(10) RDN

Chapter 11 Communication Specifications

MEMO

11-10

Chapter 12 Error Code List and Special Internal Outputs

Chapter 12 Error Code List and Special Internal
Outputs
12.1 Error Codes
The table below indicates the self-diagnostic error codes. (See Chapter 13, “Troubleshooting” about corrective actions.)
Error codes are output as hexadecimal values to the special internal output WRF000. (This special internal output is
saved during power failure, and is retained even when the causes of the error are eliminated. Also, when multiple errors
occur, the most fatal error in the error classification is stored.)
Note: LED examples
The occurrence of a flashing pattern other than the following means a micro computer error.
However, an error code is not reflected in the special internal output in this case.
: ON

Error
code

: OFF

: Flashing (1 s ON, 1 s OFF)

Error name
[detection timing]

Classifi
-cation

11

System ROM error
[at power ON]

Fatal
error

12

System RAM error
[at power ON]
Micro computer error
[always checking]

Fatal
error
Fatal
error

Reset processing in
progress
[at power ON]
System program error
[always checking]
Undefined instruction
[at starting RUN]



13

1F
23

27
31
33
34
41

44
45
46

Data memory error
[at power ON and
initializing CPU]
User memory error
[at power ON and during
RUN]
User memory size error
[at starting RUN]
Grammar/assemble error
[at starting RUN and
online change in RUN]
I/O configuration error
[always checking]

Overload error
(normal scan)
[at END processing]
Overload error
(periodical scan)
[periodical processing]
Overload error
(interrupt scan)
[during interrupt
processing]

: Flashing (500 ms ON, 500 ms OFF)

Description

RUN
LED

The system ROM has a checksum
error or cannot be read
Error in built-in ROM/FLASH )
The system RAM cannot be read
and/or written properly
Address error interrupt, undefined
instruction interrupt occurred in the
micro computer
CPU is being reset.

: Flashing (250 ms ON, 250 ms OFF)

OK
LED

Operation

Stop

Related special
internal output
Bit
Word



Stop





Stop

R7C8



Stop





Stop





Stop

R7C9



Stop





Serious A checksum error is detected in user
error memory.

Stop

R7CA



Serious
error
Serious
error

User program capacity set by the
parameter is other than 280 HEX.
There is a grammatical error in user
program.

Stop

R7CC



Stop

R7D4

WRF001

Minor
error

*1

Stop
*2

R7CD

WRF002

*1

Stop
*2

R7D1



Minor
error

• I/O assignment information and
actual loading of module do not
match
• Assignment is made for expansion
level 5 or greater.
• There exists assignment of 5 slots or
greater.
Execution time for normal scan
exceeded the overload check time set
by the parameter.
Execution time for periodical scan
exceeded the execution period.

*1

Stop
*2

R7D2



Minor
error

An interrupt of the same cause
occurred during interrupt scan

*1

Stop
*2

R7D3



Fatal
error
Serious
error

System program in FLASH memory
has a checksum error
Error is detected when an attempt is
made to execute a user program
instruction that cannot be decoded
(undefined instruction)
Serious Data memory cannot be read/written
error properly.

Minor
error

12-1

Chapter 12 Error Code List and Special Internal Outputs

Error
code
5F

61
62
63
64
65
67
68
69
6A
6B
71
*3
72
*4
94

*1:
*2:
*3:
*4:

Error name
[detection timing]
Backup memory error
[at program downloading
and special I/O function
setting is requested]
Port 1 transmission error
(parity)
[when transmitting]
Port 1 transmission error
(framing/overrun)
[when transmitting]
Port 1 transmission error
(time out)
[when transmitting]
Port 1 transmission error
(protocol error)
[when transmitting]
Port 1 transmission error
(BCC error)
[when transmitting]
Port 2 transmission error
(parity)
[when transmitting]
Port 2 transmission error
(framing/overrun)
[when transmitting]
Port 2 transmission error
(time out)
[when transmitting]
Port 2 transmission error
(protocol error)
[when transmitting]
Port 2 transmission error
(BCC error)
[when transmitting]
Battery error
(data memory)
[always checking]
Instantaneous power
failure detection
[always checking]
Port 1
No modem response
[when modem is
connected]

Classifi
-cation

Description

RUN
LED

OK
LED

Operation

Related special
internal output
Bit
Word



Warning Data cannot be written to the backup
memory.

*1

Run

Warning Parity error was detected during
transmission.

*1

Run





Warning Framing error or overrun error was
detected during transmission.

*1

Run





Warning Time out error was detected during
transmission.

*1

Run





Warning Protocol (transmission procedure)
error was detected during transmission.

*1

Runs





Warning Checksum error was detected during
transmission.

*1

Run





Warning Parity error was detected during
transmission.

*1

Run





Warning Framing error or overrun error was
detected during transmission.

*1

Run





Warning Time out error was detected during
transmission.

*1

Run





Warning Protocol (transmission procedure)
error was detected during transmission.

*1

Run





Warning Checksum error was detected during
transmission.

*1

Run





Warning • Battery voltage dropped below the
specified value
• Battery not installed
Warning Instantaneous power failure detected.

*1

Run

R7D9



*1

Run

R7CF
R7DA



Warning There is no response with the AT
command.

*1

Run





Depends on the CPU’s operating state. The RUN LED is lit while the CPU is in operation; the RUN LED is unlit while the
CPU is not in operation.
Depending on the settings of the operating parameters from the peripherals, the operation may be continued even when an error
occurs.
Although batteries cannot be mounted on the 10- or 14-point type, battery errors are monitored by the system. Set R7EE to
OFF prior to the use.
Supported by software version 1.11 (WRF051=H0111) or newer.
How to Clear the CPU Error Code:
Set 1 to the Special Internal Output R7EC.

12-2

Chapter 12 Error Code List and Special Internal Outputs

12.2 Syntax and Assembler Error Codes
The following describes the syntax and Assembler error codes. The error codes are output as hexadecimal values to the
internal output WRF001. The syntax and Assembler error checks are performed at the time of RUN startup.
Error code
H0001
H0002
H0003
H0004
H0005
H0010
H0011
H0012
H0013
H0014
H0020
H0021
H0022
H0023
H0030
H0031
H0032

Error item
Duplicate definition of
LBL
Duplicate definition of
FOR
Duplicate definition of
NEXT

Description of error
There are 2 or more LBL instructions with the
same number in the program
There are 2 or more FOR instructions with the
same number in the program
There are 2 or more NEXT instructions with the
same number in the program

Corrective action
Limit the LBL instruction that has
2 or more of the same number to 1.
Limit the FOR instruction that has
2 or more of the same number to 1.
Limit the NEXT instruction that
has 2 or more of the same number
to 1.
Duplicate definition of
There are 2 or more SB instructions with the same Limit the SB instruction that has 2
SB
number in the program
or more of the same number to 1.
Duplicate definition of
There are 2 or more INT instructions with the
Limit the INT instruction that has
INT
same number in the program
2 or more of the same number to 1.
END undefined
There is no END instruction prior to the INT or
Define the END instruction before
SB instructions
the INT or SB instruction.
RTS undefined
There is no RTS instruction corresponding to the Define the RTS instruction after
SB instruction
the SB instruction.
RTI undefined
There is no RTI instruction corresponding to the Define the RTI instruction after the
INT instruction
INT instruction.
SB undefined
There is no SB instruction corresponding to the
Define the SB instruction before
RTS instruction
the RTS instruction.
INT undefined
There is no INT instruction corresponding to the Define the INT instruction before
RTI instruction
the RTI instruction.
RTS area error
There is the RTS instruction in the normal scan
Define the RTS instruction within
area or interrupt scan program area
the subroutine area.
RTI area error
There is the RTI instruction in the normal scan
Define the RTI instruction within
area or subroutine program area
the interrupt scan area.
END area error
There is the END instruction in the interrupt scan Define the END instruction at the
program area or subroutine program area
end of the normal scan area.
CEND area error
There is the CEND instruction in the interrupt
Define the CEND instruction
scan program area or subroutine program area
within the normal scan area.
RTS start condition error There is a startup condition in the processing box Delete the startup condition of the
that includes the RTS instruction
processing box.
RTI start condition error There is a startup condition in the processing box Delete the startup condition of the
that includes the RTI instruction
processing box.
END start condition error There is a startup condition in the processing box Delete the startup condition of the
that includes the END instruction
processing box.

Syntax and Assembler error checks by the task code
The undefined contents of the syntax, Assembler and operation error codes will be checked.
However, error codes will not be set in WRF001

12-3

Chapter 12 Error Code List and Special Internal Outputs

12.3 Operation Error Codes
If an error occurs when a control instruction is executed, “1” is set in the operation error (ERR) special internal output
“R7F3” and an error code (hexadecimal) indicating the description of the error is set in WRF015.
To clear the operation errors to zeros, execute “R7F3=0” using a forced setting from a program or peripheral unit. To
clear the error codes to zeros, execute “WRF015=0” using a forced setting from a program or peripheral unit.
Error code

Error name

H0013

SB undefined

H0015

LBL undefined

H0016

FOR undefined

H0017

NEXT undefined

H0040

LBL area error

H0041
H0042

CAL nesting overflow
CAL undefined

H0043

FOR to NEXT error

H0044

NEXT area error

H0045

FOR to NEXT nesting
overflow
FOR nesting overflow

H0046

Description of error

Originating
instruction
CAL

SBn instruction corresponding to the instruction
number n in the CALn instruction is not
programmed
LBLn instruction corresponding to the instruction
number n in the JMPn and CJMPn instructions is
not programmed
FORn instruction corresponding to the instruction
number n in the NEXTn instruction is not
programmed
NEXTn instruction corresponding to the
instruction number n in the FORn instruction is
not programmed
LBLn instruction corresponding to the instruction
number n in the JMPn and CJMPn instructions is
not programmed in the same program area
There are more than 6 levels of subroutine nesting
RTS instruction was executed without executing
the CAL instruction
There is a NEXTn with the same instruction
number n prior to the FORn instruction
There is no NEXTn instruction with the same
instruction number n as the FORn instruction in
the same program area
The FORn and NEXTn instructions are not nested

FOR

There are more than 6 nesting levels of FOR to
NEXT

FOR
NEXT

12-4

JMP
CJMP
NEXT
FOR
JMP
CJMP
CAL
RTS
FOR
FOR

Chapter 12 Error Code List and Special Internal Outputs

12.4 Bit Special Internal Output Area
The MICRO-EH has a special internal output area for performing status display and various other settings. The special
internal output area is constantly backed up in case of power failure.
The following lists the definitions of the bit special internal output area (R7C0 to R7FF).
No.

Name

Meaning

R7C0 Ignore scan time
error (normal scan)
R7C1 Ignore scan time
error (cyclic scan)
R7C2 Ignore scan time
error (interrupt scan)

0:
1:
0:
1:
0:
1:

R7C3
R7C4
R7C5
R7C6
R7C7

Do not use.
Do not use.
Do not use.
Do not use.
0: On line changed not
allowed.
1: On line changed
allowed.
0: Normal
1: Abnormal

Undefined
Undefined
Undefined
Undefined
On line change in
RUN

R7C8 Serious error flag

Stop operation
Continue operation
Stop operation
Continue operation
Stop operation
Continue operation

R7C9 Microcomputer error

0: Normal
1: Abnormal

R7CA User memory error

0: Normal
1: Abnormal
Do not use.
0: Normal
1: Abnormal

R7CB Undefined
R7CC Memory size over

Description

Designates continue/stop running when
a normal scan overload error occurs
Designates continue/stop running when
Set by user
a periodic-scan overload error occurs
Designates continue/stop running when
an interrupt-scan overload error occurs

Designates whether online change in
RUN is allowed in user program
Indicates whether there is an abnormal
in the microcomputer
(Address error, undefined instruction)
Indicates whether there is an abnormal
in the microcomputer
(Computation error)
Indicates whether there is an abnormal
in user memory
Indicates whether the capacity set by
the parameter exceeds loaded memory
capacity
Indicates whether I/O assignment and
loading are matched (Mismatched
information output to WRF002)

R7CD I/O configuration
error

0: Normal
1: Unmatched

R7CE Undefined
R7CF Operation mode for
*1 instantaneous power
failure

Do not use.
0: Hold
1: Reset (same start up operation as normal power on.)

R7D0 Undefined
R7D1 Scan time error
(normal scan)

Do not use.
0: Normal
1: Scan time over

R7D2 Scan time error
(cyclic scan)
R7D3 Scan time error
(interrupt scan)

0:
1:
0:
1:

R7D4 Grammar/assemble
error

0: Normal
1: Error

Normal
Scan time over
Normal
Scan time over

R7D5 Blown fuse detection 0: Normal
1: Error

Setting
condition

Indicates whether the normal scan
execution time has exceeded the
designated time
Indicates whether the periodic scan was
completed within cycle time
Indicates whether an interrupt of the
same factor occurred during interrupt
scan execution.
Indicates whether there is a grammar
error in user program (Detailed
information output to WRF001)
Indicates whether or not a fuse
connected to the second pin (see
Chapter 11) of serial port 1 has blown
out.

R7D6 Undefined
Do not use.
*1: Supported by software version 1.11 (WRF051=H0111) or newer.

12-5

Resetting
condition
Cleared by
user, Cleared
when
retentive area
is cleared, or
the CPU is
initialized.

Set by user

Set by the
system

Cleared by
user, Cleared
when
retentive area
is cleared, or
the CPU is
initialized.

Set by the
system

Cleared by
user, Cleared
when
retentive area
is cleared, or
the CPU is
initialized.

Set by the
system

Cleared by
user, Cleared
when retentive
area is cleared,
or the CPU is
initialized.

Set by the
system

Cleared by
user, Cleared
when
retentive area
is cleared, or
the CPU is
initialized.

Set by the
system

Cleared by
the system

Chapter 12 Error Code List and Special Internal Outputs

No.

Name

R7D7 Undefined
R7D8 Undefined
R7D9
Battery error
R7DA Instantaneous power
*1 failure detection
R7DB
Self-diagnostic error
R7DC
Output mode
R7DD
R7DE
R7DF
R7E0

Undefined
Undefined
Undefined
Key switch location
(STOP)
R7E1 Undefined
R7E2 Key switch location
(RUN)
R7E3 1st scan ON after
RUN
R7E4
Always ON
R7E5
R7E6
R7E7
R7E8
R7E9

R7EA

*1:
*2:

0.02 second clock
0.1 second clock
1.0 second clock
CPU Occupation
RUN prohibited
Executing a online
change in RUN

Meaning

Description

Do not use.
Do not use.
0: Normal
Indicates whether battery voltage is
1: Abnormal
low
0: Not detected
1: Instantaneous power failure detected.
Indicates whether there is a self0: Normal
diagnostic error (Detailed information
1: Error
output to WRF000)
Operation mode at CPU stop for PWM
0: Stops output
output, pulse output and counter
1: Continues output
coincidence output.
Do not use.
Do not use.
Do not use.
0: at RUN position
1: at STOP position
Do not use.
0: at STOP position
1: at RUN position
st

ON only at the 1 scan.

1: Always

Always ON regardless of CPU status

1: Being executed

Set by the
system
Set by the
system

Resetting
condition

Cleared by
the system *2

Set by user

Cleared by
user, Cleared
when
retentive area
is cleared, or
the CPU is
initialized.

Set by the
system

Cleared by
the system

Set by the
system

Cleared by
the system

st

1: 1 scan after RUN

0: 0.01 seconds
1: 0.01 seconds
0: 0.05 seconds
1: 0.05 seconds
0: 0.5 seconds
1: 0.5 seconds
0: Unoccupied
1: Occupied
0: Operation allowed
1: Operation prohibited

Setting
condition

Cannot be
cleared.

Set by the
system
Indicates CPU occupation status from
the peripheral unit
Indicates whether it is operation
prohibited status
Indicates whether operation is
temporarily stopped (output hold) due
to online change in RUN

Supported by software version 1.11 (WRF051=H0111) or newer.
The battery error (R7D9) will turn off when the error cause is eliminated by replacing the battery, etc.

12-6

Cleared by
the system

Chapter 12 Error Code List and Special Internal Outputs

No.

Name

R7EB
R7EC
R7ED
R7EE

Clear retentive area
Clear error code
Undefined
Battery error
detection
enable/disable

R7EF Backup memory
writing execution
flag
R7F0 Carry flag (CY)
R7F1 Overflow flag (V)
R7F2 Shift data (SD)
R7F3 Operation error
(ERR)
R7F4 Data error (DER)
R7F5 Special I/O function
setting flag
R7F6 Special I/O
parameters to write in
FLASH *4
R7F7 Special I/O parameter
error
R7F8 Calendar, clock read
request
R7F9 Calendar, clock
setting request
R7FA Clock ± 30 second
adjustment request
R7FB Calendar and clock
set data error
R7FC Output control 1
R7FD Output control 2
R7FE Output control 3
R7FF Output control 4

*3:
*4:

Meaning

Description

1: Clear retentive area
1: Clear error code in WRF000 to F00A, R7C8 to 7DE
Do not use.
1: Detection enabled
Be sure to set if battery is used.
0: Detection disabled

Setting
condition
Set by user

Resetting
condition
Cleared by
the system

Set by user

Cleared by
user, or when
retentive area
is cleared, or
the CPU is
initialized.

Set by the
system *3

Cleared by
the system

Set by user

Cleared by
user

1: Being written
0:
1:
0:
1:
0:
1:
0:
1:
0:
1:
1:

No carry
Carry
No overflow
Overflow
Shift data “0”
Shift data “1”
Normal
Error
Normal
Error
Request to set

Indicates whether there is a carryover
from the operation result
Indicates whether there is overflow in
the operation result
Designates the shift data used in shift
instructions, etc.
Indicates whether there is an operation
error when operation is executed
Indicates whether there is a data error
when operation is being executed.
For counter, PWM and pulse train

Set by the
system

1: Request to write

For counter, PWM and pulse train

Set by user

0: Normal
1: Error
1: Request to read

Indicates the results of the special I/O
parameter settings.
Read the present values of calendar,
clock and set in WRF01B to WRF01F
Set the data set in WRF01B to
WRF01F in the calendar and clock
When second data (WRF00F) is 0 to
29, it becomes 0 seconds and when it is
30 to 59, +1 minute is added and
second data becomes 0
Indicates whether there is an error in
calendar and clock set data
Sets the enabling and disabling when
Y100 through Y103 is used as PWM
output, pulse output, and counter
coincidence output.

Set by the
system

1: Request to write
1: Request adjustment

0:
1:
0:
1:

Normal
Error
Output disabled
Output enabled

Cleared by
the system

Set by user

Set by the
system

Set by user

Cleared by
user
(Cleared by
the system in
case of pulse
output)

Cleared by system even when Set by user.
The word special internal output that can be written using this function is shown in Table 12.1 on the following page.

12-7

Chapter 12 Error Code List and Special Internal Outputs

No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

Table 12.1 List of special internal outputs that can be stored
Special internal output
Function
that can be stored
WRF01A
Dedicated port 1 Communication settings
WRF03C
Dedicated port 1 Modem timeout time
WRF03D
Dedicated port 2 Communication settings
WRF06B
Pulse and PWM auto correction setting
WRF06C
Potentiometer 1
Filtering time
WRF06D
Potentiometer 2
Filtering time
WRF06E
Analog input type selection
WRF06F
Phase counting mode
WRF070
I/O operation mode
WRF071
I/O detailed function settings
WRF072
Output frequency
On-preset value
WRF073
WRF074
WRF075
WRF076
On-duty value
Off-preset value
WRF077
WRF078
WRF079
WRF07A
Pre-load value
Pulse output value
WRF07B
WRF07C
WRF07D
WRF07E
Input edge
WRF07F
Input filtering time

12-8

Chapter 12 Error Code List and Special Internal Outputs

12.5 Word Special Internal Output Area
The following lists the definitions of the word special internal output area (WRF000 to WRF1FF).
Setting
No.
Name
Storage data
Description
condition
WRF000 Self-diagnosis error
Error code
code
(Hexadecimal)
WRF001 Syntax/Assembler
Syntax/Assembler error
Error code for user program
error details
code (Hexadecimal)
Syntax/Assembler error is stored
WRF002 Further information
Set by the
Mismatched slot number
system
of I/O configuration
15 12 11 8
7
4
3
0
error
0
a
b
0

Resetting
condition

Cleared by
user

a: Unit number (0 to 5)
b: Slot number (0 to F)
WRF003
-F00A
WRF00B
WRF00C
WRF00D
WRF00E
WRF00F
WRF010

Undefined

Do not use.

Calendar and clock
present value
(4 digit BCD)

Year
Month / date
Day of the week
Hour / minute
Seconds
Max. scan time × 10 ms

Scan time
(maximum value)
WRF011 Scan time
(present value)
WRF012 Scan time
(minimum value)
WRF013 CPU status

4 digit year [yyyy]
[mm dd]
Sunday: 0000 to Saturday: 0006
[hh mm] (24-hour system)
[00 ss]

Min. scan time × 10 ms.
(HFFFF at 1st scan)
8

Unused

WRF015
WRF016
WRF017

capacity
Operation error code
Division remainder
register (low word)
Division remainder
register (high word)
Undefined

WRF018F019
WRF01A Setting of

Com. port 1

Reading or writing
register for calendar
and clock
(4 digit BCD)
Use with R7F8 or
R7F9
WRF020 Undefined
to F03B

6

5

4

3

2

1

0

b

c

d

e

f

g

h

i

Set by the
system

Cleared by
user

Remainder data when division instruction executed
(Used only at double word operation)
Do not use.

b

c

8

7

d

Always
displayed

Always
displayed

Operation error code
Remainder data when division instruction executed

a

WRF01B
WRF01C
WRF01D
WRF01E
WRF01F

a

7

a: CPU type (0011),
b: Battery error (1=error, 0=no error),
c: Not used,
d-g: Not used (Fixed to 0),
h: Halt (1=executing, 0=not executing),
i: CPU operation (1=RUN, 0=STOP)
Number of words for word internal output (WR) = H1000

15 14 13 12

Always
displayed

Cleared by
the system (in
the RUN
starts)

Current scan time × 10 ms

15 14 13 12 11

WRF014 Word internal output

Set by the
system

0
Unused

a: Transmission control procedures (0- Standard, 1-Simplified)
b-c: Not used
d: Baud rate during modem connection
= 00000: 4800 bps, = 00001: 9600 bps, = 00010: 19.2 kbps
= 00011: 38.4 kbps, = 00100: 57.6 kbps, = 00101: 2400 bps
= 4800 bps for other than the above
Year
4 digit year [yyyy]
Month / date
[mm dd]
Day of the week
Sunday: 0000 to Saturday: 0006
Hour / minute
[hh mm] (24-hour system)
Seconds
[00 ss]
Do not use.

12-9

Set by user

Cleared by
user

Set by system
or user

Cleared by
user

Chapter 12 Error Code List and Special Internal Outputs

No.

Name

Storage data

Setting
condition

Description

Resetting
condition

WRF03C Port 1

Modem timeout time

15

8

a

7

0

Not used

Modem timeout time

a: Whether or not settings are present

0=No setting
1=Setting is present
Modem timeout time: 1 second increments (set with hexadecimal
value)
0=No timeout monitoring

Set by user

Cleared by
user

Set by user

Cleared by
user

WRF03D Port 2

Communication
settings

15 14 13 12
a

b

8

c

7

0

d

Station number

a: Setting bit 1=Set

Set to 0 by the system after setting is
complete.
b: Transmission control procedures 0=Standard, 1=Simplified
c: Whether or not station numbers are present 0=No station
numbers, 1=Station numbers are present
d: Baud rate settings
= 00000: 4800 bps, = 00001: 9600 bps, = 00010: 19.2 kbps
= 00011: 38.4 kbps, = 4800 bps if other than the above
Station numbers: 2 digits from 00 through 31 of BCD
Set to 31 for values outside the range
WRF03E Potentiometer input 1 0 - 1023
WRF03F Potentiometer input 2 0 - 1023
WRF040 Occupied member
to F042 registration area 1
WRF043 Occupied member
to F045 registration area 2

Set by user

Cleared by
user
Cleared by
user

Occupied port number
a: 0=Not occupied, 1=Read-occupied, 2=Write-occupied
b: Loop number
c: Unit number
d: Module number e: Port number
15

WRF046 Occupied member
to F048 registration area 3
WRF049 Occupied member
to F04B registration area 4
WRF04C
to F04F
WRF050
WRF051
WRF052
WRF053
WRF054
WRF055
WRF057

Set by user

8

7

0

a

Fixed to 0

b

c

d

e

Undefined

Do not use.

System ROM version
System ROM version
Undefined
Undefined
Power on timer
Power on timer
Detailed information
of counter setting
errors

System software version in internal ROM
System software version in external FLASH memory
Do not use.
Do not use.
Power on time [sec.] (low word)
Power on time [sec.] (high word)
15 14
a

8
Not used

7

6

5

4

3

2

1

0

b

c

d

e

f

g

h

i

a: Error in pulse frequency total
b: Pulse 4 frequency
c: Pulse 3 frequency
d: Pulse 2 frequency
e: Pulse 1 frequency
f: Counter 4 preset
g: Counter 3 preset
h: Counter 2 preset
i: Counter 1 preset
0=Normal, 1=Error

12-10

Set by the
system

Cleared by
the system

Set by the
system

-

Set by the
system

-

Set by the
system

Cleared by
the system

Chapter 12 Error Code List and Special Internal Outputs

No.

Name

Stored data

Setting
condition

Description

Resetting
condition

WRF057 Detailed information

of counter setting
errors

15 14
a

8
Not used

7

6

5

4

3

2

1

0

b

c

d

e

f

g

h

i

a: Error in pulse frequency total
b: Pulse 4 frequency
c: Pulse 3 frequency
d: Pulse 2 frequency
e: Pulse 1 frequency
f: Counter 4 preset
g: Counter 3 preset
h: Counter 2 preset
i: Counter 1 preset
0=Normal, 1=Error

Set by the
system

Cleared by
the system

Set by user

Cleared by
the system

Set by user

Cleared by
the system

Set by user

Cleared by
the system

Set by user

Cleared by
the system

WRF058 PI/O function

individual setting
request 1 *

15

2
Not used

1

0

a

b

a: Output number (during pulse setting)
Off-preset (during counter setting)
b: On-preset (during counter setting)
Frequency (during pulse setting), frequency, on-duty (during
PWM setting)
0=No changes, 1=Change request
WRF059 PI/O function

individual setting
request 2 *

15

2
Not used

1

0

a

b

a: Output number (during pulse setting)
Off-preset (during counter setting)
b: On-preset (during counter setting)
Frequency (during pulse setting), frequency, on-duty (during
PWM setting)
0=No changes, 1=Change request
WRF05A PI/O function

individual setting
request 3 *

15

2
Not used

1

0

a

b

a: Output number (during pulse setting)
Off-preset (during counter setting)
b: On-preset (during counter setting)
Frequency (during pulse setting), frequency, on-duty (during
PWM setting)
0=No changes, 1=Change request
WRF05B PI/O function

individual setting
request 4 *

15

2
Not used

WRF05D Undefined
to F06A

1

0

a

b

a: Output number (during pulse setting)
Off-preset (during counter setting)
b: On-preset (during counter setting)
Frequency (during pulse setting), frequency, on-duty (during
PWM setting)
0=No changes, 1=Change request
Do not use.

12-11

Chapter 12 Error Code List and Special Internal Outputs

No.

Name

WRF06B Pulse and PWM

output auto
correction setting
WRF06C Potentiometer CH1
WRF06D Potentiometer CH2
WRF06E Analog input type

selection

Stored data

WRF070

WRF071
WRF072
to F075
WRF076
to F079
WRF07A
to F07D
WRF07E
WRF07F
WRF080
to F19F

*:

Resetting
condition

01: For EH-***DTP
The output waveforms of the pulses and
02: For EH-***DT
PWM are automatically corrected by
03: For EH-***DRP
setting the value corresponding to the
04: For EH-***DRT
CPU model.
Sampling number: 0 to 40.

15 14 13
a

WRF06F

Setting
condition

Description

b

0
Not used

Selects whether the analog input is voltage or current.
a: Analog 1 selection
0=Voltage
1=Current
b: Analog 2 selection
0=Voltage
1=Current
Counting mode of
00: Mode 0 01: Mode 1
2-phase counter
02: Mode 2 03: Mode 3
I/O operation mode H00: Mode 0
H01: Mode 1
H02: Mode 2
H03: Mode 3
H10: Mode 10
I/O detailed function I/O assignment for counter, PWM and pulse train output
settings
Output frequency,
Frequency setting value, on-preset setting value
On-preset value
On-duty value,
On-duty setting value, off-preset setting value
Off-preset value
Pre-load value,
Counter pre-load value or pulse output value
Pulse output value
Input edge
Counter input edge setting value
Input filtering time
Filter time ×0.5 ms, up to 40 (=20ms)
Undefined
Do not use.

See Chapter 8 for more details.

12-12

Set by user

Cleared by
user

Chapter 13 Troubleshooting

Chapter 13 Troubleshooting
13.1 Error Display and Actions
The display locations of errors detected by individual device in the MICRO-EH system are shown in Figure 13.1. When
an error occurs, take an action according to the error code list.

LADDER EDITOR
POW
OK
RUN

OK Lamp

L/E error display

LADDER EDITOR
for Windows®

L/E for Windows® error display

Figure 13.1 Error display locations of the MICRO-EH
(1)

Error display
(a) Error display on the main unit
The MICRO-EH will perform self-diagnostic tests using the microcomputer, and when there is an error the contents
are indicated in the combination of lit/flashing/not lit of the OK and RUN lamps located in the front of the main unit.
See the error code list and action in Chapter 12, for the detailed error codes and actions.
(b) Programmer error display
Error codes encountered during program device operation, such as duplicate definition error, undefined error,
operation error, program over, etc., will be displayed on the programming device. For detailed error codes,
refer to the error code list in the programming device manual.
(c) GPCL error display
The error detected by the CPU during the GPCL operation is displayed at the bottom left of the screen. For
the details of error codes, see the list of error codes in the GPCL manual.
(d) Setting in the special internal output
An error code is set in the special internal output area (such as WRF000). The smaller the error code value,
the more serious the error is. When two or more errors occur, the smaller number is set. For example, if “71”
(battery error) and “31” (user memory error) occur simultaneously, “31” is set. If the levels are the same, the
cause code generated last will be displayed.
The clearing of error special internal output is performed by setting the special internal output R7EC to “1.”
The R7EC can be set to “1” either by connecting the programming device or by including a subprogram that
sets the R7EC using external input within the program. (If turning R7EC on by the program, always set it on
after the error cause has been verified. However, if R7EC is turned on by a program that would generate a
congestion error, the system may clear the error cause and rerun after detecting a congestion error.)
Note: Error codes are set in hexadecimal values. Verify error codes by setting the monitor to hexadecimal
display.

13-1

Chapter 13 Troubleshooting

The following shows the range of the special internal output that is cleared when R7EC is set to “1.”
No.
Bit special internal output
R7C8
Fatal error flag
9
Microcomputer error
A
User memory error
B
(Undefined)
C
Memory size over
D
I/O verify mismatch
E
(Undefined)
R7CF
(Undefined)
R7D0
(Undefined)
1
Congestion error (normal scan)
2
Congestion error (periodical scan)
3
Congestion error (interrupt scan)
4
Syntax/assembler error
5
(Undefined)
6
(Undefined)
7
(Undefined)
8
(Undefined)
9
Battery error
A
(Undefined)
R7DB
Self-diagnostic error

No.
Word special internal output
WRF000
Self-diagnostic error code
1
Syntax/assembler error details
2
I/O verify mismatch details

When all of the special internal output data cannot be cleared during program execution, refer to the selfdiagnostic error code list and clear only the corresponding error flags by using forced set of the programmer
or peripheral unit.
Caution
If the internal output for a self-diagnostic error R7DB (WRF000) is used as a system error for the stop condition of CPU
RUN, the R7DB may be turned on even with an error of the warning level (battery error, etc.), causing the CPU to stop.
Therefore, do not use the internal output of the self-diagnostic error as a condition for stopping the CPU.

13-2

Chapter 13 Troubleshooting

(2) Corrective actions when an error occurred
The process flow when an error occurred is shown below.
Error occurred

Error is detected by the CPU module and displayed by lit/flashing/not lit
of RUN and OK LEDs.

Verify the self-diagnostic error code (WRF000) with the RUN and OK
LED statuses or using a peripheral unitand refer to error code list.

Reference the bit special
internal output (14-1).

Reference the word
special internal output
(14-2).
Reference the grammar/
assemble error (WRF001)
detailed data (13-2) and
remove the error cause.

Reference the operation
error (WRF015) detailed
data (13-3) and remove
the error cause.

Remove the error cause according to the corrective action for each error code as shown below.

If there are spare parts available, replace the parts.

Error code
11
12
13
1F
23
27

31

33
34
41
44
45
46
5F

Error name
System ROM error
System RAM error
Microcomputer error
System program error

Contact our service
department.

Corrective action
Restart the power.
If the same error occurs, it is a hardware error in the CPU module, so replace the CPU module
with a spare.
Make sure that there are no machines, etc. that generate excessive noise near MCRO-EH.

Undefined instruction
Note: The 1x error cannot be verified since peripheral units cannot be connected until the
Data memory error
system starts up after powering on again.
Power shut-off, power Check the power supply voltage of the basic unit and expansion unit.
supply error
User memory error
The contents of the user program is destroyed. Perform initialization and transfer the program
again.
This is displayed when the machine is stored with a worn-out battery or without battery for a
long period of time.
User memory size
This may be displayed when the contents of the memory within the basic unit is unstable.
error
If the same error occurs after initialization, replace the basic unit with a new one.
Syntax/assembler
There is a syntax/assembler error in the user program.
error
Verify the program and I/O assignment.
I/O information
Check the I/O assignment.
verification error
Check the expansion cable connection.
Congestion error
Change the program so that the scan time of the user program is less or change the congestion
(normal scan)
check time.
Congestion error
Change the program so that the periodic interrupt program execution time is less.
(periodic scan)
Congestion error
Perform interlock externally to that the same interrupt will not occur during interrupt
(interrupt scan)
processing. Change the program so that the execution time of the interrupt program is short.
Backup memory error There is a possibility that the FLASH memory cannot be written to. Reset the power after the
user program is read and saved to the peripheral units.

13-3

Chapter 13 Troubleshooting

Error code
Error name
61
Port 1 transmission
error (parity)
62
Port 1 transmission
error
(framing/overrun)
63
Port 1 transmission
error (timeout)
64
Port 1 transmission
error (protocol error)
65
Port 1 transmission
error (BCC error)
67
Port 2 transmission
error (parity)
68
Port 2 transmission
error
(framing/overrun)
69
Port 2 transmission
error (timeout)
6A
Port 2 transmission
error (protocol error)
6B
Port 2 transmission
error (BCC error)
71
Battery error
91

Port 1
Modem no response

Corrective action
Check the connection of the connector cable.
Check the settings such as the transmission speed.
Check to see if there are any sources of noise near the cable.

Check the connection of the connector cable.
Check to see if there are any sources of noise near the cable.
Verify the protocol specification, examine the host computer processing and correct any
errors.

Check the connection of the connector cable.
Check the settings such as the transmission speed.
Check to see if there are any sources of noise near the cable.

Check the connection of the connector cable.
Check to see if there are any sources of noise near the cable.
Verify the protocol specification, examine the host computer processing and correct any
errors.

Replace the battery with a new one.
Verify the connection of the battery connector.
Verify the connection with battery.
Replace the modem with a new one.

Perform the following procedures to erase the error display.
(a)

(b)

When the basic unit is being stopped
Turn the basic unit RUN switch (or RUN terminal) to “STOP,” then to “RUN” again.
If the cause of the error has been corrected, the OK lamp is lit. However, the error information remains in the
error special internal output, which stores the CPU error types and details. (This makes it possible to analyze
the error after recovery.) To reset the error information, perform the procedures shown in (b) or turn ON the
special internal output (R7EB) of the power failure memory clear on the peripheral units.
When the CPU is still running (RUN)
Set the special internal output R7EC to “1” to clear the OK lamp indicator and the error internal output.

13-4

Chapter 13 Troubleshooting

13.2 Checklist when Abnormality Occurred
If an error occurs in the MICRO-EH system, check the following items. If there are no problems in the following items,
contact our service department.
(a)

(b)

(c)

(d)

(e)

Power supply related items
• Is the power voltage correct? (85 to 264 V AC)
• Are there any warps in the power supply waveform?
• Are there any excessive noises in the power supply?
• Is power supplied for all basic and expansion units?
CPU related items
• Are the initial settings (CPU initialization, I/O assignment, parameter settings, etc.) proper?
• Are there any error codes that are output to the special internal output?
• Is the RUN switch (or RUN terminal) in the proper location?
• Are batteries mounted properly? Is the battery life still remaining? (23/28-point types only)
Input module related items
• Is the input voltage within the specifications for the internal section?
• Is there any noise or chattering in the input?
• Do the I/O assignment numbers in the program match?
• Is the wiring done properly?
Output module related items
• Do the module and the load power supply type (DC/AC) match?
• Do the load voltage and current match the specification of the output section?
• Is there any noise or chattering in the output waveform?
• Is the wiring done properly?
• Do the I/O assignment numbers in the program match?
• Are there any unintentional overlaps in the output numbers?
Wiring related items
• Is the wiring between the expansions mixed up with other wires?
• Are the power supply wiring and I/O cables separated?
• Are there any foreign substances in the connector of the basic/expansion units?

Cautions
(a)

When returning the unit for repair, please notify us of the malfunctioning conditions in as much detail as possible
(including error codes, malfunctioning I/O bit number, will not turn on or off, etc.).

(b)

The tools and devices necessary for troubleshooting are briefly as follows:
Phillips/flathead drivers, digital multimeter, tester, oscilloscope (necessary depending on the case) etc.

13-5

Chapter 13 Troubleshooting

13.3 Procedures to Solve Abnormality
The following shows the processing flow when a problem has occurred:
Problem occurred

Bring the system to a safe condition

Record the status

Problem, Analysis, Presumption

Major problems
PLC will not start
Will not operate
(will not RUN)
Operation stopped
(RUN stopped)
Erroneous input, no input
(abnormal operation)
Counter input does not
operate
Output error, no output
(abnormal operation)
PWM pulse output does
not operate
Peripheral unit problem

Verification points
Power LED, CPU error
code

Typical causes of problem

Power supply problem, power shut-off,
insufficient power supply capacity, fatal CPU
error
I/O assignment problem, incorrect parameter
CPU error code, CPU
settings, incorrect user program, syntax error,
LED, Internal output of
operating conditions not established, writeerror
occupied status
Power LED, CPU LED, Power supply problem, expansion power supply
CPU error code
problem/shut-off, CPU problem, memory
problem
User program timings, input power supply, bad
CPU LED, I/O LED
Monitoring by peripheral connection, problem in input area, I/O inductive
noise
units
Input LED, special
Input power supply, bad connection, problem in
internal output setting
input area, I/O inductive noise, operating mode
setting error
User programming, bad connection, problem in
CPU LED, I/O LED,
Monitoring by peripheral output area, I/O inductive noise
units, Forced setting
Output LED, special
Bad connection, problem in output area, I/O
internal output setting
inductive noise, operating mode setting error
CPU error code, fuse,
Fatal CPU error, peripheral unit problem,
peripheral units
peripheral unit setting error, cable problem,
broken fuse

Correct or replace the faulty area

(Verify according to the item
corresponding to the problem.)

Verify the system operation

Operation

13-6

Reference
item
(a)
(b)

(c)
(d)
(e)
(f)
(g)
(h)

Chapter 13 Troubleshooting

(a) PLC will not start
The CPU OK LED does not turn off even when power is started, nor peripheral units cannot be connected on-line.

POWER LED is lit

NO

YES

Power supply check
AC power supply type
• AC power supply voltage (at
the input terminal)
• DC power supply voltage (at
the output terminal)
DC power supply type
• DC power supply voltage (at
the input terminal)
• DC power supply voltage (at
the output terminal)
Fitting between terminal stand
and main unit

Self-diagnostic error code

11

12

NO

13 1F

Fatal CPU error

YES

Occur frequently?

There is a possibility of power
supply area damage

YES

NO
Contact our service department
Malfunction due to noise

13-7

Chapter 13 Troubleshooting

(b)

Will not operate (will not run)
Even if the PLC operation conditions are met, the CPU does not operate (the RUN LED does not turn on) and
remains stopped. However, the peripheral units go on-line.
Caution

If the CPU is WRITE-occupied, the CPU will not run even if the RUN switch is switched from “STOP” to “RUN.” The
CPU starts running by pressing the GRS key after peripheral units are connected.

Self-diagnostic error code

27

31

YES

33

Serious memory error

Check the memory
Perform CPU initialization
Set memory parameters
Reset the power
Replace CPU if above steps
does not remedy the problem

NO

Self-diagnostic error code

23

34

44

YES

45

Serious user program error

NO

Check the user program
• Check programs using
peripheral devices
• Error special internal output
monitor
• Verify scan time
• Correct program

Check I/O assignments
• Check the assignment table at
peripheral devices
• Can I/O assignment be
corrected?
• Malfunction due to noise

13-8

Chapter 13 Troubleshooting

(c)

Operation stopped (RUN stopped)
During normal operation, the CPU suddenly stops (the RUN LED turns off).

POWER LED is lit
(Power supply is
normal)

NO

YES

Check the power supply
• Instantaneous power failure
occurs
• Power is shut off on the
expansion unit side

Self-diagnostic error code

11

12

YES

13 1F

Fatal CPU error

NO

Turn the power off and turn it
back on

Check the program
Check parameters
Check I/O assignment
Contact our service department
if a fatal error occurs frequently

Parameter settings
Program congestion
Check I/O assignment
Duplicate use of the timer
counter
• Retransfer of program
• Connection with the expansion
connector
•
•
•
•

13-9

Chapter 13 Troubleshooting

(d)

Wrong input at input module or no input (operation problem)
The CPU runs, but the input data is not correct.

Input LED is not lit
Input is not read

YES

NO

Input LED is lit
Input is not read

•
•
•
•

Check input signals
Input signal voltage
Input power supply type
Cable disconnection
High-speed pulse is entered
in a normal input

•
•
•
•

Check input monitor
I/O assignment
Program
Input signal voltage

YES

Check input signals

NO

Input LED is not lit
Input is read

YES

NO

LED error
∗ LED replacement may not be
performed by the user, so a
repair request must be
submitted.

Check for input error
Check
input signal source
•
• Check input program
• Malfunction due to noise

13-10

Chapter 13 Troubleshooting

Data cannot be entered.

Is there a wiring
error, disconnection
or loose screw on the
terminal block?

YES
Perform rewiring

NO
Is there input
when the voltage is
checked between
the common and bit
on the input side?

NO
Check the wiring systems
Change the voltage to satisfy
the specifications

YES

Is the LED lit?

NO
Contact our service department

YES

Is there an error on the
internal contactors on the
terminal stand?

YES
Replace the terminal block

NO
Contact our service department

I/O assignment error is generated, but data is read.

Are the program and I/O
assignment correct?

NO
Correct the error

YES

Is the cable in the
expansion unit
damaged?

NO
Replace the expansion unit

YES
Replace the expansion cable

13-11

Chapter 13 Troubleshooting

(e)

The counter input does not function
The CPU operates, but the input data is incorrect

Does it operate as
normal input?

NO
Check the input area
• Check the input signal source
• Malfunction due to noise
• Cable is disconnected

YES

Are pulses that exceed
5 kHz being input?

YES
Set the pulse input to 5kHz or
less

NO

Are the operating mode
settings correct?

NO
Set the operating mode for the
peripheral devices
Note: The operating mode can
only be changed while the
CPU is being stopped

YES

Are the I/O function
settings correct?

NO
Set the I/O functions on devices
such as peripheral devices

YES

Are the various
settings valid?

NO
Turn on the setting enabling
request flag ON using peripheral
devices

YES
Check the input area
Check
the input pulse
•
• Malfunction due to noise

13-12

Chapter 13 Troubleshooting

(f)

Wrong output from output module or output module will not output (operation problem)
The CPU operates, but output signals are not correct.

Output LED is not lit
Will not output

YES

NO

Output LED is lit
Will not output

Check the output area
Forced
output
•
• I/O assignment
• Program
YES

NO

Check output signals
Output signal voltage
Power supply voltage for load
Terminal block wiring
Terminal block connector
connection
• Voltage between the common
and the bit
• Wiring
Especially for the S terminal
on the transistor
• The drive power supply for the
relay is not connected
•
•
•
•

Output LED is not lit
Will output

YES

NO

LED error
∗ LED replacement may not be
performed by the user, so a
repair request must be
submitted

Check for output error
• Check the output power
supply
• Check the output program
• Malfunction due to noise

13-13

Chapter 13 Troubleshooting

The CPU operates, but output signals are not detected.

Is the LED lit?

NO
Check the program

YES

Is there a wiring error,
disconnection or loose
screw on the terminal
block?

YES
Perform rewiring

NO

Is the relay drive power
supply connected?

NO
Supply 24 VDC power

YES

Is the voltage satisfying
the specification in the
terminal block? Is the
polarity correct?

NO
Change the voltage and polarity
to satisfy the specifications

YES

Are there any problem in
internal contactors of the
terminal block?

YES
Replace the terminal block

NO
Contact our service department

I/O assignment error occurred, but output is normal.

Are the program and
I/O assignment
correct?

NO
Correct the error

YES

Is the expansion unit
cable damaged?

YES
Replace the expansion unit

NO
Replace the expansion cable

13-14

Chapter 13 Troubleshooting

(g)

The PWM and pulse output does not operate
The CPU operates, but the pulse output and PWM output are not correct

Does it operate as
normal output?

NO
Check the output area
• Output signal voltage
• Power supply voltage for the
load
• Terminal stand wiring
• Terminal stand connection
• Voltage between the
common and bit
• Wiring
Especially for the S terminal on
the transistor

YES

Pulse is output using
the relay output

YES
The expected pulse output from
the relay is not output

NO

Are the operating mode
settings correct?

NO
Set the operating mode for the
peripheral devices
Note:The operating mode can
only be changed while the
CPU is being stopped

YES

Are the I/O function
settings correct?

NO
Set the I/O functions on devices
such as peripheral devices

YES

Are the various
settings valid?

NO
Turn on the setting enabling
request flag ON using
peripheral devices

YES

Is the backup
memory being
written? *1

YES
Wait until the write to the
backup memory is completed.

NO

The total pulse output
exceeds 5kHz?

*1 Pulse output only.

YES
Set the pulse input to be a total
of 5 kHz or less*

NO

* Pulse output only. 2 kHz is the upper
Check the output area

limit for PWM output.

• Check the output power supply
• Malfunction due to noise

13-15

Chapter 13 Troubleshooting

(h)

Peripheral units problem
Peripheral units cannot be connected.

Is it a fatal CPU error?

YES

NO

Are the connection
cable type, continuity
and connector
connections normal?

NO
Expansion connector check
Expansion cable check

YES

Are the CPU
communication setting
correct?

NO
Correct the setting
Set the CPU DIP SW to the
communication speed of the
peripheral unitused

YES

Is there 5 V DC output
when a 5 V DC power
supply is required?

NO
Broken fuse
∗ Fuse replacement may not be
performed by the user, so a
replacement request must be
submitted

YES
Replace the connection cable

Please contact our service
department.

13-16

Chapter 14 Operation Examples

Chapter 14 Operation Examples
To understand the basic operation of the MICRO-EH, this chapter explains samples of operations such as inputting
simple programs and verifying operations.
The following programming devices can be used:
Peripheral unit name
Form
HL-PC3
H series ladder diagram
HL-AT3E
instruction language software
LADDER EDITOR
HLW-PC3
2
H series ladder diagram
HLW-PC3E
instruction language software
LADDER EDITOR for Windows® version
* Graphic input device (format: GPCL01H) can be used except on-direct mode.
1

(1)

Operation verification procedures
An operation is verified according to the following procedures:
Start
Start the LADDER EDITOR for Windows

®

STEP

1

Perform initial settings

STEP

2

Input program

STEP

3

Check program errors

STEP

4

Save program

STEP

5

Transfer program to the CPU

STEP

6

Monitor (verify the operation)

STEP

7

End

A personal computer and LADDER EDITOR for Windows® are used as the peripheral units in the example. For
details, refer to the user's manual for each peripheral unit.
(2)

Detailed operation example
The following explains an operation example using the module and sample program from step 1.
CPU:
14-point type
Slot 0: Bit point X48
Slot 1: Bit point Y32
Slot 2: 16 vacant points
Input/output operating mode: Mode 0
(WRF070 = 0, default value)
Operation of program
Turn Y100 and Y 102 on and
Y101 and Y103 off and vice
versa, alternating at one second
intervals.

R7E3
(00001)

R0 = 1
R0

TD0

TD1

TD0
Y100 = 1
Y101 = 0
Y102 = 1
Y103 = 0

TD0

TD0

14-1

(00003)

TD1

Y100 = 0
Y101 = 1
Y102 = 0
Y103 = 1

(00002)
. 1S 10

(00004)
. 1S 10

(00005)

Chapter 14 Operation Examples

STEP
1.

1 Starting the LADDER EDITOR for Windows®

Start the personal computer.
Start the personal computer.

2.

Start the LADDER EDITOR for Windows® system (GRS screen).
From the Start menu of Windows®, click
[Program] → [Hladder] → [Hladder].
As LADDER EDITOR for Windows® is started,
the GRS screen is displayed.

Startup

3.

Switching to Offline mode.
Click [Offline] in the Menu bar.

GRS screen

The Read/Edit screen is displayed.

Mode switching

14-2

Chapter 14 Operation Examples

STEP

2 Initialization

Settings for the CPU type, memory type and I/O assignment are performed.
1.

Setting the CPU type
Click [Utility] → [Environment Settings] in
the Menu bar.

Pull-down menu

The Environment Setting dialogue box is displayed.

Specify the CPU type from the Ladder tag.
• Click the W of the Offline CPU field to show the
available CPU types in the pull-down display.
Select the CPU type.
• Click the [OK] button.

Pull-down display of CPU types

Specify the transmission speed from the
Communication tag.
• Select the transmission speed set with the DIP
switches of the MICRO-EH main unit (in case of
the 10-point type CPU, the transmission speed is
fixed at 4800 bps).
• Specify the communication port.
• Click the [OK] button.
Pull-down display of CPU types

Select “H-302” for the CPU type setting.

14-3

Chapter 14 Operation Examples

2.

Setting the memory type
Click [Utility] → [CPU Setting] → [CPU
Information] in the Menu bar.
The CPU Information dialogue box is displayed.

Pull-down menu

• Click the Memory Cassette/Ladder Assign button
and select the memory cassette size.
• Click [Execute] or the [Memory/Execute]
button.
CPU Information dialogue box

• Click the [OK] button in the confirmation
dialogue box.
Set the memory cassette size to RAM-04H.
[Execute]: Save to the PC memory
[Memory/Execute]: Save to the PC memory and
Window registry.

3.

Assigning I/O
Click [Utility] → [CPU Setting] → [I/O
Assign] in the Menu bar.

Pull-down menu

The I/O Assign List dialogue box is displayed.
Click the W of the Types field and select
[Standard] from the pull-down display.
I/O Assign List dialogue box

There are two setting methods for the subsequent
procedures.
• From the I/O Assign List
• From the I/O Assign List → Slot Setting Status

14-4

Chapter 14 Operation Examples

[Setting from the I/O Assign List]
1] Double-click the cell for the unit number and
slot number to be set.
The Assignment Setting dialogue box is displayed.

The Assignment Setting dialogue box

v
2]

Click the W of the data and select I/O type
from the pull-down display.
3] Click the [OK] button to close the Assignment
Setting dialogue box.

Setting of I/O type

In the same way, repeat steps 1] to 3] to assign X48
and 16 vacant points to Slot 1 and 2 respectively.

If a wrong value has been entered, the slot is left blank by assigning [Vacant 0] and is treated as though nothing is
assigned to it.
4] Click the [Execute] button.
The information assigned to the PC memory is
written.

5] Click the [OK] button in the confirmation
dialogue box to close the I/O Assignment List
dialogue box.

Confirmation dialogue box

14-5

Chapter 14 Operation Examples

[Setting from the Slot Setting Status]
Click the [Slot] button to display the Slot Setting
Status dialogue box.
1] Click the W of the unit and select the unit
number from the pull-down display.
2] Click the button of the slot number to be set.
Slot Setting Status dialogue box

3] Click the W of the data and select the I/O type
from the pull-down display.
4] Click the [OK] button and close the
Assignment Setting dialogue box.
Specification of I/O type

In the same way, repeat the steps 1] and 2] to 4] to
set other unit and slot numbers in order to perform
I/O assignment according to the unit to be used.
In this example, X48 and 16 vacant points are
assigned to slots 1 and 2 respectively.
5] Click the [Close] button to close the Slot
Setting Status dialogue box.
Enter the I/O assignment set in the Slot Setting
Status into the I/O Assignment List.

6] Click the [Execute] button to write the
assigned information to the PC memory.
7] Click the [OK] button in the confirmation
dialogue box to close the I/O Assignment List
dialogue box.

Confirmation dialogue box

For online mode, it is possible to read the I/O mounted on the CPU by the “Mount” button. For details, refer to the
“Reading Mounted I/O” of the programming device.
14-6

Chapter 14 Operation Examples

STEP
1.

3 Program Input

Input a program.
At first, the output window displays “there is no
program” in the bottom left of the Read/Edit
screen.
The cursor , which indicates the program input
position, is placed at the top left of the screen.

Read/Edit screen

Output window

[Input procedure of ladder program]
Repeat steps 1] to 4] to proceed with symbol input. The usual operations found in other Windows applications, such as
cut, copy, paste, and move, can be performed on already input symbols.
1] Specify the input position. (Move the cursor  by clicking the mouse or the arrow keys.)
2] Click symbols in the Symbol bar.
Symbol bar

3] Input the desired function (I/O, comparison expression, arithmetic expression) in the dialogue box for the symbol
displayed.
4] Click the [OK] button in the dialogue box.
[Example of entering a contact]
1] Begin from the cursor position at the top left.
2] Click the symbol for contact A.
The dialogue box for contacts is displayed.
Symbol selection

3] Enter “R7E3” as the I/O No. in the Input field.
(I/O No. (half-width alpha-numeric input) can
be entered by the keyboard only, or by
selecting the initial letter(s) from the pull-down
menu of W and by typing the rest.)
Enter a proper comment.
Contact property

4] Click the [OK] button.
The dialogue closes.

14-7

Chapter 14 Operation Examples

When the dialogue box closes, the symbol is
displayed in the Read/Edit screen and the cursor
shifts.

Display of symbol

The comment is displayed under the symbol.

[Example of entering a Processing Box]
1] The specification of the input position can be
omitted when entering symbols into the same
circuit as the contact above.
2] Click the symbol for Processing Box.
Symbol selection

The cursor moves to the far-right portion of the
screen automatically.
The dialogue box for the processing box symbol is
displayed.
3] Input arithmetic expressions in the Expression
in Processing Box text field.
Multiple lines (a maximum of 19) can be input by
including line breaks

Processing Box properties

The comment for the I/O No. written to the
Processing Box is displayed by clicking the
Comment column.
If there are no comments, only the I/O No. is
displayed.

Always enter a space before and after “=“.
• The Comment Input dialogue box is displayed by
double-clicking the I/O No. displayed in the
Comment column.
• Input a comment and click the [OK] button.
Comment Input dialogue box

4] Click the [OK] button in the Processing Box.
14-8

Chapter 14 Operation Examples

The input of the horizontal line symbol, which connects between symbols, may be omitted. (Symbols are connected by
horizontal lines by the automatic wiring function at circuit write.)
[Example of entering a timer]
1] Specify the input position, or omit the
specification if entering it in the same circuit.
2] Click the symbol for coil.
When the specification of the input position is
omitted, the cursor automatically moves to the
far-right portion of the screen.

Symbol selection

3] Input I/O No., time base, and the first setting
value.

Coil property

The following initials of various I/O numbers can
be selected from the pull-down display of the Input
field:
R, L, M, Y, TD, SS, WDT, MS, TMR, CU,
RCU, CTU, CTD, CL
Input values in the necessary items, such as the
time base, the first setting value, and second setting
value, according to the I/O No.
(Example) Coil
It is only necessary to enter values in
the Input and Comment items.

4] Click the [OK] button to display the symbol at
the cursor at the far-right portion of the circuit.
Symbols whose input positions for coils, arithmetic
expressions, etc. are determined are automatically
flushed to the right.

Display of symbols

After displaying the coil, the cursor moves to the
top of the next circuit.
[Example of entering a Comparison Box]
1] Specify the input position
2] Click the symbol for Comparison Box.
Symbol selection

14-9

Chapter 14 Operation Examples

3] Input comparison expression and comment.
4] Click the [OK] button.

Comparison Box property

The comment input is valid only for I/O numbers.
In this example, entering a comment for the value
on the right side of the expression will not generate
a comment.

Always enter a space between an I/O number and comparison operator (in this case, between “WY10” and “= =“), as
well as between a comparison operator and comparison data (“= =“ and “0”).
[Example of entering a Knot]
1] Specify the input position.
2] Click the symbol for Knot.
The symbol is displayed and the cursor moves to
the right.

Display of symbols

[Example of entering a Vertical Line]
1] Specify the input position.
2] Click the symbol for Vertical Line.
The symbol is displayed on the right side of the
cursor.
The cursor does not move.

Display of symbol

In case of the Horizontal Line symbol, the cursor
does move to the right after displaying the symbol,
in the same way as in the Knot symbol.
2.

Writing to the program memory
Perform a “circuit write” operation by either of the
following methods in order to write the circuit
to the program memory.
1] Click [Build] → [Circuit write] in the Menu
bar.
2] Click the [circuit write] icon
tool bar.

in the

Circuit write operation

14-10

Chapter 14 Operation Examples

STEP

4 Checking Program Errors

Check to see if the program in the memory is correct.
Click [Utility] → [Check] in the Menu bar.
The Check dialogue box is displayed.

Pull-down menu

• Click the [All items] or the individual check
column to specify the items to be checked.
• Click the [Execute] button.
The Check Result dialogue box is displayed.

Check dialogue box

The checking of the CPU can be specified at online
mode.

• Click the [OK] button.
The Check Result dialogue box closes.

Check Result dialogue box

(Note)
For example, if the I/O assignment of bit Y32 is
missing for unit 1, WY10 of the sample is treated
as undefined; the error is displayed as in the figure
to the right.
If there are any errors, correct the errors of the program before check the program again.

14-11

Chapter 14 Operation Examples

STEP

5 Saving the Program

Save the program and comment that has been created to a floppy disk.
Click [File] → [Record] in the Menu bar, the
Record icon
, or [File] → [Batch Record].
The dialogue for Record or Batch Record is
displayed.

Pull-down menu

Record
: Specify the file type and save.
Batch Record: Saves a program and all the
comment files.

Record dialogue box:
Specify the directory to save in, file name, and
file type.
Batch Record dialogue box:
Specify the place to save and file name.
Click the [Save] button to save.
Record dialogue box

File name extensions are not necessary to input.

Record and Batch Record display the results of the
save operations for one file and five files
respectively.
The figure to the left shows an example of a result
display for the Batch Record.

Batch Record Result dialogue box

14-12

Chapter 14 Operation Examples

STEP

6 Program Transfer to CPU

Write the program that has been input, to the CPU. However, verify the following:
• The CPU and the personal computer connection cable are properly connected.
• The CPU power is on.
• CPU mode switch is set to “STOP.”
1.

Switching to online mode.
Move to the GRS screen from the offline mode.
This can be done in two ways.
1] Click [File] → [GRS] in the Menu bar.
2] Click
(lower button) on the upper right of
the screen.

GRS screen

In the GRS screen, click the [Online] item in the
Menu bar.
The Read/Edit screen of the online mode is
displayed.

GRS screen

Note: Verify again that the DIP switches are set to
the transmission speed selected in the
Environment Setting in step 2. (For the 10point type, it is fixed to 4800 bps.)

2.

Initializing the CPU
Click [Utility] → [Initialize] → [CPU initialize]
in the Menu bar.

Pull-down menu

Note: Please note that programs etc. in the personal
computer will be erased if [PC initialize] is
selected.

14-13

Chapter 14 Operation Examples

The Confirmation dialogue box is displayed; click
the [Yes] button and start the CPU initialization.

The Exit dialogue box is displayed; click the [OK]
button to close the dialogue.

3.

Transferring to the CPU
Click [File] → [CPU write] in the Menu bar.

Pull-down menu

Program transfer
CPU Read: PC (personal computer) ← CPU
CPU Write: PC (personal computer) → CPU

The CPU Write dialogue box is displayed.
Click the [Execute] button.

CPU write dialogue box

When the writing is completed, the result is
displayed.
Click the [Close] button to close the dialogue box.

Display of write result

14-14

Chapter 14 Operation Examples

STEP

7 Monitoring (Verifying the Operation)

Monitor the program execution status in the CPU.
[Circuit monitor]
Click [Mode] → [Monitor] in the Menu bar.

Pull-down menu

The Confirmation dialogue box for the program
match check between PC and the CPU is displayed.
Click the [Yes] button.

Match check

Set the CPU's RUN switch to “RUN” to begin the
CPU operation.
The on/off status of the contact, timer, and current
counter value are displayed.

Display of circuit monitor

To monitor and display the current value and
progress value, select comparison expression,
arithmetic box, and coil (timer, counter, etc.) with
the mouse arrow.
[I/O monitor]
The I/O monitor can be operated while in monitor
mode.
Click [Window] → [I/O Monitor] in the Menu
bar.
The I/O Monitor dialogue box is displayed.

Pull-down menu

The I/O Monitor dialogue box is displayed on the
Read/Edit screen at its maximum size.

14-15

Chapter 14 Operation Examples

The I/O monitor can be specified in the following
two ways.
1] Click [Edit] → [I/O monitor setting] in the
Menu bar.
2] Click the

icon in the Symbol bar.

I/O Monitor dialogue box

• Enter the starting I/O No.
• Click the number of points to be monitored.
• Click on either the [Add], [Insert], or
[Overwrite] buttons.
I/O Monitor Setting dialogue box

Monitor and display 16 points from Y100.

I/O monitor

The I/O monitor can display up to 64 I/O points (up
to 64 including words/double-words).
Click the I/O No. being I/O monitored and click
[Edit] → [Delete] to delete it from the monitor.
The display size of the I/O Monitor dialogue box
can be changed by clicking

.

Both the circuit monitor in the Read/Edit screen
and the I/O Monitor can be displayed by making
their display sizes smaller to check the operation.

Display of circuit and I/O monitor

14-16

Chapter 15 Daily and Periodic Inspection

Chapter 15 Daily and Periodic Inspections
In order to use the functions of the MICRO-EH in the optimal conditions and maintain the system to operate normally, it
is essential to conduct daily and periodic inspections.
(1)

Daily inspection
Verify the following items while the system is running.
Table 15.1 Items for daily inspection
LED
Item
Normal status
Main cause of error
display
Unit LED display
POW
Lighting
Power supply error, etc.
*1
When not lit:
RUN
Lighting
Microcomputer malfunction, memory error, etc.
(in RUN
When flashing:
status)
Syntax error, congestion error, etc.
OK
Lighting
When not lit:
Microcomputer malfunction, memory error, etc.
When flashing:
Battery error *2
*1: The MICRO-EH indicates the error contents using the combination of lit/flashing/not lit status of OK and
RUN lamps. For details, see the error code list in Chapter 12.
*2: If the power supply for the basic unit is left turned off without replacing the battery after the OK lamp was
flashing, the memory contents may be destroyed. Exercise caution when the system power is turned off for a
long period of time, since this error may not have been detected and the memory contents may have already
been destroyed.

(2)

Periodic inspection
Turn off the power for the external I/O circuit and check the following items once every six months.

Part

Table 15.2 Items for periodic inspection
Item
Check criteria

Programming device to
CPU

Check operation of
programming device

Power supply
I/O module

Check for voltage fluctuations
Output relay life
LED
External power voltage

Battery
(Lithium battery)

Check voltage and life

Installation and
connecting areas

(1) All modules are securely
fixed
(2) All connectors fit snugly
(3) All screws are tightened
(4) Damage and deterioration
of each cable
(1) Temperature
(2) Humidity
(3) Other
Check number of parts, storage
condition
Check program contents

Ambient environment

Spare parts
Program

(3)

Remarks

Must be able to be connected online.
All switches and display lamps work
normally.
85 to 264 V AC
Tester
Electrical life
200,000 times
See the relay contact life
Mechanical life 20 million times
curve (Chapter 10).
Turns on/off correctly
Within the specification for each I/O See the I/O specifications
(Chapter 6).
Is the OK lamp flashing?
Check to see if it has been less than
2 months since the last exchange.
There should be no problem.
Tighten
Check insertion
Tighten
Visual check
0 to 55 °C
5 to 95 % RH (no condensation)
No dust, foreign matter, vibration
There should be no problem.
Compare the contents of the latest
program saved and CPU contents,
and make sure they match.

-

Check both master and
backup.

Life of the power module
Numbers of electrolytic condensers are used in the power module. Electrolytic condensers have a lifetime and it is
believed that the life is reduced by half when the ambient temperature rises 10 °C.
When stocking spare parts, the standard for consideration is that the power module has a life of approximately five
years when used at the rated ambient temperature (30 °C). Also, to extend the life of the module, consider the air
circulation around the module and ambient temperature when installing it.

15-1

Chapter 15 Daily and Periodic Inspection

(4)

Life of the battery
• The battery life time is shown below.
Battery life time (total power off time) [Hr] *
Guaranteed value (Min.) @55°C

Actual value (Max.) @25°C

9,000

18,000

* Battery life time has been changed since Oct. 2002 production (MFG NO.02Jxx) due to hardware modification.
•
•
R7D9

The battery life can be determined by checking for the flashing of the OK lamp.
The battery life time flag is in the bit special internal output “R7D9.”
An example of a circuit using “R7D9” is shown below.
Y00100

The battery error can be output to external output Y00100 by using

Y00100

the ladder shown to the left.
* R7EE is a bit to enable battery error detection. Be sure to set R7EE
if battery is used.

Figure 15.1 Battery error detection circuit
•
•
•
(5)

The self-diagnostic error code “71” indicates that the battery is not loaded or that it has reached its life.
Exchange the battery every two years even if it is still functional.
Use the battery within one year after purchase.

How to replace the battery

Blue

Red

-

Connector on battery side

+

Figure 15.2 Replacing battery
1]
2]
3]
4]

Prepare a new battery (EH-MBAT).
Replace the battery while the power supply to the basic base is turned on.
Remove the old lithium battery from the battery case.
Insert the new battery and connect the cable to the CPU module.
Insert it so that the red lead is , and the black lead is .
5] Fold the excess lead and store it in the lead storage space.
(If excess lead is not stored properly, the wire may get caught on the front cover and be severed.)
* When exchanging while the basic unit power turned off, perform steps 4], 5] and 6], in less than 30 minute.

Caution on handling the battery
Be careful when replacing the battery, since incorrect replacement may cause the battery to explode. Use EH-MBAT for new
batteries.
Batteries that have been replaced should be individually placed in a suitable plastic bag (to prevent shorting) and a disposal
company should be requested to dispose of them.
At this time, do not short the batteries, throw them in a fire, dismantle them, exert external force, expose them to water,
charge them or cut the lead wires since doing so leads to the risk that the batteries will ignite, explode or burn up.
15-2

Appendix 1 H-series Instruction Support Comparison Chart

Appendix 1 H-Series Instruction Support
Comparison Chart
[Basic instructions and sequence instructions]
No.

Instruction
format

Instruction name

MICRO- EH-150
EH

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

Start logical operation

{

{

{

{

{

{

{

{

{

LDI

Start logical NOT operation

{

{

{

{

{

{

{

{

{

AND

Logical AND

{

{

{

{

{

{

{

{

{

4

ANI

Logical AND not

{

{

{

{

{

{

{

{

{

5

OR

Logical OR

{

{

{

{

{

{

{

{

{

1

LD

2
3

6

ORI

Logical OR not

{

{

{

{

{

{

{

{

{

7

NOT

Logical NOT

{

{

{

{

{

{

{

{

{

8

AND DIF

Detect rising edge

{

{

{

{

{

{

{

{

{

9

OR DIF

Detect rising edge

{

{

{

{

{

{

{

{

{

10

AND DFN

Detect falling edge

{

{

{

{

{

{

{

{

{

11

OR DFN

Detect falling edge

{

{

{

{

{

{

{

{

{

12

OUT

Output I/O

{

{

{

{

{

{

{

{

{

13

SET

Set I/O

{

{

{

{

{

{

{

{

{

14

RES

Reset I/O

{

{

{

{

{

{

{

{

{

15

MCS

Start master control

{

{

{

{

{

{

{

{

{

16

MCR

Cancel master control

{

{

{

{

{

{

{

{

{

17

MPS

Push operation result

{

{

{

{

{

{

{

{

{

18

MRD

Read operation result

{

{

{

{

{

{

{

{

{

19

MPP

Pull operation result

{

{

{

{

{

{

{

{

{

20

ANB

Connect logical block in serial

{

{

{

{

{

{

{

{

{

21

ORB

Connect logical block in parallel

{

{

{

{

{

{

{

{

{

22

[ ]

Start and end processing box

{

{

{

{

{

{

{

{

{

23

( )

Start and end relational box

{

{

{

{

{

{

{

{

{

H-64
~
H-20

H-200

H-250

H-252

[Basic instructions and timers/counters]
No.

Instruction
format

Instruction name

MICRO- EH-150
EH

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

1

OUT TD

On-delay timer

{

{

{

{

{

{

{

{

{

2

OUT SS

Single shot

{

{

{

{

{

{

{

{

{

3

OUT MS

Mono stable timer

×

{

×

×

{

{

{

{

{

4

OUT TMR

Integral timer

×

{

×

×

{

{

{

{

{

5

OUT WDT

Watchdog timer

×

{

×

×

{

{

{

{

{

6

OUT CU

Counter

{

{

{

{

{

{

{

{

{

7

OUT RCU

Ring counter

×

{

×

×

{

{

{

{

{

8

OUT CTU

Up-down counter up

{

{

{

{

{

{

{

{

{

9

OUT CTD

Up-down counter down

{

{

{

{

{

{

{

{

{

10

OUT CL

Clear counter

{

{

{

{

{

{

{

{

{

A-1

Appendix 1 H-series Instruction Support Comparison Chart

[Basic instructions and comparison boxes]
No.

Instruction format

Instruction name

MICRO- EH-150
EH

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

1

LD (s1 == s2)

= comparison box

{

{

{

{

{

{

{

{

{

2

AND (s1 == s2)

= comparison box

{

{

{

{

{

{

{

{

{

3

OR (s1 == s2)

= comparison box

{

{

{

{

{

{

{

{

{

4

LD (s1 S== s2)

Signed = comparison box

{

{

×

×

{

{

{

{

{

5

AND (s1 S== s2)

Signed = comparison box

{

{

×

×

{

{

{

{

{

6

OR (s1 S== s2)

Signed = comparison box

{

{

×

×

{

{

{

{

{

7

LD (s1 < > s2)

< > comparison box

{

{

{

{

{

{

{

{

{

8

AND (s1 < > s2)

< > comparison box

{

{

{

{

{

{

{

{

{

9

OR (s1 < > s2)

< > comparison box

{

{

{

{

{

{

{

{

{

10

LD (s1 S< > s2)

Signed < > comparison box

{

{

×

×

{

{

{

{

{

11

AND (s1 S< > s2)

Signed < > comparison box

{

{

×

×

{

{

{

{

{

12

OR (s1 S< > s2)

Signed < > comparison box

{

{

×

×

{

{

{

{

{

13

LD (s1 < s2)

< comparison box

{

{

{

{

{

{

{

{

{

14

AND (s1 < s2)

< comparison box

{

{

{

{

{

{

{

{

{

15

OR (s1 < s2)

< comparison box

{

{

{

{

{

{

{

{

{

16

LD (s1 S< s2)

Signed < comparison box

{

{

×

×

{

{

{

{

{

17

AND (s1 S< s2)

Signed < comparison box

{

{

×

×

{

{

{

{

{

18

OR (s1 S< s2)

Signed < comparison box

{

{

×

×

{

{

{

{

{

19

LD (s1 <= s2)

<= comparison box

{

{

{

{

{

{

{

{

{

20

AND (s1 <= s2)

<= comparison box

{

{

{

{

{

{

{

{

{

21

OR (s1 <= s2)

<= comparison box

{

{

{

{

{

{

{

{

{

22

LD (s1 S<= s2)

Signed <= comparison box

{

{

×

×

{

{

{

{

{

23

AND (s1 S<= s2)

Signed <= comparison box

{

{

×

×

{

{

{

{

{

24

OR (s1 S<= s2)

Signed <= comparison box

{

{

×

×

{

{

{

{

{

A-2

Appendix 1 H-series Instruction Support Comparison Chart

[Arithmetic instructions]
No.

Instruction
format

Instruction name

MICRO- EH-150
EH

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

1

d=s

Assignment statement

{

{

{

{

{

{

{

{

{

2

d = s1 + s2

Binary addition

{

{

{

{

{

{

{

{

{

3

d = s1 B+ s2

BCD addition

{

{

{

{

{

{

{

{

{

4

d = s1 – s2

Binary subtraction

{

{

{

{

{

{

{

{

{

5

d = s1 B– s2

BCD subtraction

{

{

{

{

{

{

{

{

{

6

d = s1 × s2

Binary multiplication

{

{

{

{

{

{

{

{

{

7

d = s1 B× s2

BCD multiplication

{

{

{

{

{

{

{

{

{

8

d = s1 S× s2

Signed binary multiplication

{

{

×

×

{

{

{

{

{

9

d = s1 / s2

Binary division

{

{

{

{

{

{

{

{

{

10

d = s1 B/ s2

BCD division

{

{

{

{

{

{

{

{

{

11

d = s1 S/ s2

Signed binary division

{

{

×

×

{

{

{

{

{

12

d = s1 OR s2

Logical OR

{

{

{

{

{

{

{

{

{

13

d = s1 AND s2

Logical AND

{

{

{

{

{

{

{

{

{

14

d = s1 XOR s2

Exclusive OR

{

{

{

{

{

{

{

{

{

15

d = s1 == s2

= comparison expression

{

{

{

{

{

{

{

{

{

16

d = s1 S== s2

Signed = comparison expression

{

{

×

×

{

{

{

{

{

17

d = s1 < > s2

≠ comparison expression

{

{

{

{

{

{

{

{

{

18

d = s1 S< > s2

Signed ≠ comparison expression

{

{

×

×

{

{

{

{

{

19

d = s1 < s2

< comparison expression

{

{

{

{

{

{

{

{

{

20

d = s1 S< s2

Signed < comparison expression

{

{

×

×

{

{

{

{

{

21

d = s1 <= s2

≤ comparison expression

{

{

{

{

{

{

{

{

{

22

d = s1 S<= s2

Signed ≤ comparison expression

{

{

×

×

{

{

{

{

{

H-64
~
H-20

H-200

H-250

H-252

[Application instructions] (1/2)
No.

1
2
3
4
5
6
7
8
9
10

Instruction
format
BSET (d, n)
BRES (d, n)
BTS (d, n)
SHR (d, n)
SHL (d, n)
ROR (d, n)
ROL (d, n)
LSR (d, n)
LSL (d, n)
BSR (d, n)

Instruction name

MICRO- EH-150
EH

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

Bit set
Bit reset
Bit test
Shift right
Shift left
Rotate right
Rotate left
Logical shift right
Logical shift left
BCD shift right

{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{

11

BSL (d, n)

BCD shift left

{

{

{

{

{

{

{

{

{

12
13
14
15
16
17

WSHR (d, n)
WSHL (d, n)
WBSR (d, n)
WBSL (d, n)
MOV (d, s, n)
COPY (d, s, n)

Batch shift right
Batch shift left
Batch BCD shift right
Batch BCD shift left
Block transfer
Copy

×
×
×
×
{
{

{
{
{
{
{
{

×
×
×
×
×
×

×
×
×
×
×
×

{
{
{
{
{
{

{
{
{
{
{
{

{
{
{
{
{
{

{
{
{
{
{
{

{
{
{
{
{
{

A-3

Appendix 1 H-series Instruction Support Comparison Chart

[Application instructions] (2/2)
No.

18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

Instruction
format
XCG (d, d2, n)
NOT (d)
NEG (d)
ABS (d, s)
SGET (d, s)
EXT (d, s)
BCD (d, s)
BIN (d, s)
DECO (d, s, n)
ENCO (d, s, n)
SEG (d, s)
SQR (d, s)
BCU (d, s)
SWAP (d)
FIFIT (P, n)
FIFWR (P, s)
FIFRD (P, d)
UNIT (d, s, n)
DIST (d, s, n)
ADRIO (d, s)

Instruction name

Block exchange
Reverse
Two's complement
Absolute value
Sign addition
Sign expansion
Binary → BCD conversion
BCD → Binary conversion
Decode
Encode
7 segment decode
Square root
Bit count
Swap
Initialize FIFO
Write FIFO
Read FIFO
Unit
Distribute
Convert I/O address

MICRO- EH-150
EH

{
{
{
{
×
×
{
{
{
{
×
×
{
{
×
×
×
{
{
×

{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{

H-64
~
H-20

H-200

H-250

H-252

×
{
{
{

×
{
{
{

×
×
{
{
{
{

×
×
{
{
{
{

×
×
{
{

×
×
{
{

×
×
×
{
{

×
×
×
{
{

{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{

×

×

×

{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{

{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{
{

[Control instructions]
No.

Instruction
format

Instruction name

MICRO- EH-150
EH

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

End normal scan

{

{

{

{

{

{

{

{

{

CEND (s)

End scan condition

{

{

{

{

{

{

{

{

{

JMP n

Unconditional jump

{

{

{

{

{

{

{

{

{

4

CJMP n (s)

Conditional jump

{

{

{

{

{

{

{

{

{

5

RSRV n

Reserve

×

×

×

×

×

×

{

{

{

1

END

2
3

6

FREE

Free reserve

×

×

×

×

×

×

{

{

{

7

LBL n

Label

{

{

{

{

{

{

{

{

{

8

FOR n (s)

For

{

{

×

×

{

{

{

{

{

9

NEXT n

Next

{

{

×

×

{

{

{

{

{

10

CAL n

Call subroutine

{

{

{

{

{

{

{

{

{

11

SB n

Start subroutine program

{

{

{

{

{

{

{

{

{

12

RTS

Return subroutine

{

{

{

{

{

{

{

{

{

13

START n

Start basic task

×

×

×

×

×

×

{

{

{

14

INT n

Start interrupt scan program

{

{

{

{

{

{

{

{

{

15

RTI

Return interrupt

{

{

{

{

{

{

{

{

{

A-4

Appendix 1 H-series Instruction Support Comparison Chart

[High-function module transfer instructions]
No.

Instruction
format

1

TRNS 0 (d, s, t)

2

RECV 0 (d, s, t)

3

TRNS 1 (d, s, t)

4

QTRNS1 (d, s, t)

5

TRNS 2 (d, s, t)

6

QTRNS2 (d, s, t)

7

TRNS 3 (d, s, t)

8

QTRNS3 (d, s, t)

9

RECV 3 (d, s, t)

10

TRNS 4 (d, s, t)

11

QTRNS 4 (d, s, t)

12

TRNS 5 (d, s, t)

13

TRNS 6 (d, s, t)

Instruction name

General-purpose port transmission
instruction
General-purpose port reception
instruction
Data transmission/reception
instruction for SIO, CLOCK
High-speed data
transmission/reception instruction for
SIO, CLOCK
Data transmission/reception
instruction for ASCII
High-speed data
transmission/reception instruction for
ASCII
Data transmission instruction for
POSIT-H
High-speed data transmission
instruction for POSIT-H
Data reception instruction for POSITH
Data transmission/reception
instruction for POSIT-2H,
POSITA2H
High-speed data
transmission/reception instruction for
POSIT-2H, POSITA2H
Data transmission/reception
instruction for XCU-001H
Data transmission/reception
instruction for XCU-232H

MICRO- EH-150
EH

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

{*

{

×

×

×

×

×

{

{

{*

{

×

×

×

×

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

×

×

{

{

×

×

×

×

×

×

×

{

{

×

×

×

×

×

×

×

{

{

×

×

×

×

×

×

×

{

{

×

×

×

×

×

×

×

{

{

×

×

×

×

×

×

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

×

×

{

{

×

×

×

×

×

×

×

{

{

×

×

×

×

×

×

×

{

{

H-64
~
H-20

H-200

H-250

H-252

* Supported by software version 1.30 (WRF051=H0130) or newer.
[FUN instructions] (1/5)
No.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Instruction
format
FUN 0 (s)
(PIDIT (s))
FUN 1 (s)
(PIDOP (s))
FUN 2 (s)
(PIDCL (s))
FUN 4 (s)
(IFR (s))
FUN 5 (s)
FUN 10 (s)
(SIN (s))
FUN 11 (s)
(COS (s))
FUN 12 (s)
(TAN (s))
FUN 13 (s)
(ASIN (s))
FUN 14 (s)
(ACOS (s))
FUN 15 (s)
(ATAN (s))
FUN 20 (s)
(DSRCH (s))
FUN 21 (s)
(TSRCH (s))
FUN 30 (s)
(BINDA (s))
FUN 31 (s)
(DBINDA (s))

Instruction name

MICRO- EH-150
EH

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

PID operation initialization

×

{

×

×

×

{

×

{

{

PID operation execution control

×

{

×

×

×

{

×

{

{

PID operation execution

×

{

×

×

×

{

×

{

{

Process stepping

×

{

×

×

×

×

×

×

{

General purpose port switching
SIN function calculation

{
×

×
{

×
×

×
×

×
×

×
{

×
×

×
{

×
{

COS function calculation

×

{

×

×

×

{

×

{

{

TAN function calculation

×

{

×

×

×

{

×

{

{

ARC SIN function calculation

×

{

×

×

×

{

×

{

{

ARC COS function calculation

×

{

×

×

×

{

×

{

{

ARC TAN function calculation

×

{

×

×

×

{

×

{

{

Data search

×

×

×

×

×

{

×

{

{

Table search

×

×

×

×

×

{

×

{

{

Binary → decimal ASCII conversion
(16 bits)
Binary → decimal ASCII conversion
(32 bits)

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

A-5

Appendix 1 H-series Instruction Support Comparison Chart

[FUN instructions] (2/5)
No.

16

Instruction
format

39
40

FUN 32 (s)
(BINHA (s))
FUN 33 (s)
(DBINHA (s))
FUN 34 (s)
(BCDDA (s))
FUN 35 (s)
(DBCDDA (s))
FUN 36 (s)
(DABIN (s))
FUN 37 (s)
(DDABIN (s))
FUN 38 (s)
(HABIN (s))
FUN 39 (s)
(DHABIN (s))
FUN 40 (s)
(DABCD (s))
FUN 41 (s)
(DDABCD (s))
FUN 42 (s)
(ASC (s))
FUN 43 (s)
(HEX (s))
FUN 44 (s)
(ASDD (s))
FUN 45 (s)
(SCMP (s))
FUN 46 (s)
(WTOB (s))
FUN 47 (s)
(WTOW (s))
FUN 48 (s)
(BSHR (s))
FUN 49 (s)
(BSHL (s))
FUN 50 (s)
(TRSET (s))
FUN 51 (s)
(TRACE (s))
FUN 52 (s)
(TRRES (s))
FUN 60 (s)
(BSQR (s))
FUN 61 (s)
(PGEN (s))
FUN 70 (s)
FUN 71 (s)

41

FUN 72 (s)

42
43
44

FUN 73 (s)
FUN 74 (s)
FUN 80 (s)
(ALREF (s))

17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

Instruction name

Binary → hexadecimal ASCII
conversion (16 bits)
Binary → hexadecimal ASCII
conversion (32 bits)
BCD → decimal ASCII conversion
(16 bits)
BCD → decimal ASCII conversion
(32 bits)
Unsigned 5 digit
Decimal ASCII → binary conversion
Signed 10 digit
Decimal ASCII → binary conversion
4-digit hexadecimal ASCII → binary
conversion
8-digit hexadecimal ASCII → binary
conversion
4-digit decimal ASCII → BCD
conversion
8-digit decimal ASCII → BCD
conversion
Hexadecimal binary → ASCII
conversion (digit designation)
Hexadecimal ASCII → binary
conversion (digit designation)
Unit character strings

MICRO- EH-150
EH

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

×

×

×

×

×

{

×

{

{

Compare character strings

×

×

×

×

×

{

×

{

{

Word → byte conversion

×

×

×

×

×

{

×

{

{

Byte → word conversion

×

×

×

×

×

{

×

{

{

Shift byte unit to right

×

×

×

×

×

{

×

{

{

Shift byte unit to left

×

×

×

×

×

{

×

{

{

Set sampling trace

×

×

×

×

×

{

×

{

{

Execute sampling trace

×

×

×

×

×

{

×

{

{

Reset sampling trace

×

×

×

×

×

{

×

{

{

Binary square root

×

×

×

×

×

{

×

{

{

Dynamic scan pulse

×

×

×

×

×

{

×

{

{

Set high-speed counter mode
Read high-speed counter progress
value
Write high-speed counter progress
value
Read high-speed counter set value
Write high-speed counter set value
Refresh I/O (all points)

×
×

×
×

{
{

×
×

×
×

×
×

×
×

×
×

×
×

×

×

{

×

×

×

×

×

×

×
×
{

×
×
{

{
{
×

×
×
×

×
×
×

×
×
{

×
×
×

×
×
×

×
×
{

A-6

Appendix 1 H-series Instruction Support Comparison Chart

[FUN instructions] (3/5)
No.

45
46
47
48
49
50
51
52
53
54
55
56

Instruction
format
FUN 81 (s)
(IORREF (s))
FUN 82 (s)
(SLREL (s))
FUN 90
(ETDIT)
FUN 91
(ETD)
FUN 92
(ECUIT)
FUN 93
(ECU)
FUN 94
(ECTU)
FUN 95
(ECTD)
FUN 96
(ECL)
FUN 97
(WNRED)
FUN 98
(WNWRT)
FUN 100
(INT)

57

FUN 101
(INTD)

58

FUN 102
(FLOAT)

59

FUN 103
(FLOATD)

60

FUN 104
(FADD)
FUN 105
(FSUB)
FUN 106
(FMUL)
FUN 107
(FDIV)
FUN 108
(FRAD)
FUN 109
(FDEG)
FUN 110
(FSIN)
FUN 111
(FCOS)
FUN 112
(FTAN)
FUN 113
(FASIN)
FUN 114
(FACOS)

61
62
63
64
65
66
67
68
69
70

Instruction name

MICRO- EH-150
EH

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

Refresh I/O
(input/output designation)
Refresh I/O refresh (any slot)

{

{

×

×

×

{

×

×

{

{

{

×

×

×

{

×

×

{

Expansion timer initial setting

×

×

×

×

×

×

×

×

{

Expansion timer execution

×

×

×

×

×

×

×

×

{

Expansion counter/up-down counter
initial setting
Expansion counter execution

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

Expansion up-down counter up
execution
Expansion up-down counter down
execution
Clear expansion counter

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

Read expansion link area

×

×

×

×

×

×

×

×

{

Write expansion link area

×

×

×

×

×

×

×

×

{

Floating decimal point operation
(real number → integer (word )
conversion)
Floating decimal point operation
(real number → integer (double word)
conversion)
Floating decimal point operation
(integer (word) → real number
conversion)
Floating decimal point operation
(integer (double word) → real number
conversion)
Floating decimal point operation
(addition)
Floating decimal point operation
(subtraction)
Floating decimal point operation
(multiplication)
Floating decimal point operation
(division)
Floating decimal point operation
(angle → radian conversion)
Floating decimal point operation
(radian → angle conversion)
Floating decimal point operation
(SIN)
Floating decimal point operation
(COS)
Floating decimal point operation
(TAN)
Floating decimal point operation
(ARC SIN)
Floating decimal point operation
(ARC COS)

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

A-7

Appendix 1 H-series Instruction Support Comparison Chart

[FUN instructions] (4/5)
No.

71

Instruction
format

91
92

FUN 115
(FATAN)
FUN 116
(FSQR)
FUN 117
(FEXP)
FUN 118
(FLOG)
FUN 120
(INDXD)
FUN 121
(INDXS)
FUN 122
(INDXC)
FUN 123
(INC)
FUN 124
(INCD)
FUN 125
(DEC)
FUN 126
(DECD)
FUN 127
(BITTOW)
FUN 128
(WTOBIT)
FUN 130
(FBINI)
FUN 131
(FBMOV)
FUN 132
(FBCHG)
FUN 133
(FWRED)
FUN 134
(FWWRT)
FUN 135
(FRED)
FUN 136
(FWRT)
FUN 140 (s)
FUN 141 (s)

93
94

FUN 142 (s)
FUN 143 (s)

95

FUN 144 (s)

96

FUN 145 (s)

72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90

Instruction name

MICRO- EH-150
EH

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

Floating decimal point operation
(ARC TAN)
Floating decimal point operation
(square root)
Floating decimal point operation
(exponent)
Floating decimal point operation
(natural logarithm)
Index setting (argument d)

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

{

×

×

×

×

×

×

{

×

×

×

×

×

×

×

×

{

Index setting (argument s)

×

×

×

×

×

×

×

×

{

Cancel index

×

×

×

×

×

×

×

×

{

Increment (INC)

×

×

×

×

×

×

×

×

{

Double word increment (DINC)

×

×

×

×

×

×

×

×

{

Decrement (DEC)

×

×

×

×

×

×

×

×

{

Double word decrement (DECD)

×

×

×

×

×

×

×

×

{

Expand bit data to word data

×

×

×

×

×

×

×

×

{

Expand word data to bit data

×

×

×

×

×

×

×

×

{

Set file memory block

×

×

×

×

×

×

×

×

{

Transfer file memory block

×

×

×

×

×

×

×

×

{

Exchange file memory block

×

×

×

×

×

×

×

×

{

Read file memory word unit

×

×

×

×

×

×

×

×

{

Write file memory word unit

×

×

×

×

×

×

×

×

{

Read file memory byte unit

×

×

×

×

×

×

×

×

{

Write file memory byte unit

×

×

×

×

×

×

×

×

{

High-speed counter operation control
High-speed counter coincident output
control
High-speed counter up/down control
Rewrite current high-speed counter
value
Read current high-speed counter
value
Clear current high-speed counter
value

{
{

×
×

×
×

×
×

×
×

×
×

×
×

×
×

×
×

{
{

×
×

×
×

×
×

×
×

×
×

×
×

×
×

×
×

{

×

×

×

×

×

×

×

×

{

×

×

×

×

×

×

×

×

A-8

Appendix 1 H-series Instruction Support Comparison Chart

[FUN instructions] (5/5)
No.

Instruction
format

97
98
99
100
101

FUN 146 (s)
FUN 147 (s)
FUN 148 (s)
FUN 149 (s)
FUN 150 (s)

102

FUN 151 (s)

103

FUN 210 (s)
(LOGIT (s))
FUN 211 (s)
(LOGWRT (s))
FUN 212 (s)
(LOGCLR (s))
FUN 213 (s)
(LOGRED (s))
FUN 254 (s)
(BOXC (s))
FUN 255 (s)
(MEMC (s))

104
105
106
107
108

Instruction name

MICRO- EH-150
EH

H-64
~
H-20

H-200

H-250

H-252

H-2000 H-2002 H-4010
H-700 H-1002
H-300 H-702
H-302

Preset high-speed counter
PWM operation control
Change PWM frequency on-duty
Pulse output control
Change number of pulse frequency
output setting
Pulse output with
acceleration/deceleration
Initial setting for data logging

{
{
{
{
{

×
×
×
×
×

×
×
×
×
×

×
×
×
×
×

×
×
×
×
×

×
×
×
×
×

×
×
×
×
×

×
×
×
×
×

×
×
×
×
×

{

×

×

×

×

×

×

×

×

×

{

×

×

×

×

×

×

×

Write log data

×

{

×

×

×

×

×

×

×

Clear log data

×

{

×

×

×

×

×

×

×

Read log data

×

{

×

×

×

×

×

×

×

BOX comment

{

{

{

{

{

{

{

{

{

Memo comment

{

{

{

{

{

{

{

{

{

Supported command for EH-150 depends on CPU types. Please read EH-150 application manual for further information.

A-9

Appendix 2 Standards

Appendix 2 Standards
MICRO-EH products are global products designed and manufactured for use throughout the world. They should be installed and
used in conformance with product-specific guidelines as well as the following agency approvals and standards.

Item
Industrial Control
Equipment[Safety]
Hazardous Locations[Safety]
Class I, Div II, A,B,C,D
European EMC Directive
European Low Voltage Directive
Australia C-tick mark

UL 508
CSA C22.2 no 142-M1987
UL 1604
CSA C22.2 No142-M1987
IEC 61131-2 (2003)
IEC 61131-2 (1994)
AS/AZN CISPR11 (2002)

Standards
Certification by Underwriters Laboratories for
selected modules
Certification by Underwriters Laboratories for
selected modules
Emission, Immunity

Warning:
Explosion hazard – substitution of componets may impair suitability for class I, division 2"
Do not replace modules unless power has been switched off or the area is known to be non-hazardous.
Do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous.

A-11

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Format                          : application/pdf
Title                           : HIDIC MICRO-EH APPLICATION MANUAL
Description                     : NJI-350(X)
Creator                         : HITACHI,Ltd.
Author                          : HITACHI,Ltd.
Subject                         : NJI-350(X)

EXIF Metadata provided by EXIF.tools

Hitachi Nji 350B Users Manual HIDIC MICRO EH APPLICATION

NJI-350B micro-EH-MA-NJI350BX-W

NJI-350B to the manual b0c219f7-c5b8-45bc-99ca-fbfc487bf68c

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