Omron Cj1W Drm21 Users Manual

CJ1W-DRM21 to the manual 83cf46ff-4ed2-4116-ad5b-04b6cd16eba8

2015-01-24

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CS-series DeviceNet Unit: CS1W-DRM21
CJ-series DeviceNet Unit: CJ1W-DRM21
Operation Manual
Revised July 2001

Notice:
OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.
The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or damage to property.

!DANGER

!WARNING
!Caution

Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury, or property damage.

OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers to
an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.
The abbreviation “PC” means Programmable Controller and is not used as an abbreviation for anything else.

Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient operation of the product.
Reference

Indicates supplementary information on related topics that may be of interest
to the user.

1,2,3...

1. Indicates lists of one sort or another, such as procedures, checklists, etc.

Trademarks and Copyrights
DeviceNet is a registered trademark of the Open DeviceNet Vendor Association, Inc.
Windows, Windows 95, Windows 98, Windows Me, Windows NT, and Windows 2000 are registered
trademarks of the Microsoft Corporation.
Other product names and company names in this manual are trademarks or registered trademarks of
their respective companies.
The copyright of the DeviceNet Unit belongs to OMRON Corporation.

 OMRON, 2000
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, or
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission of
OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is constantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.

TABLE OF CONTENTS
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xii

General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xii

Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xii

Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xiii

Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xiv

Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xvi

SECTION 1
Features and System Configuration . . . . . . . . . . . . . . . .

1-1

Overview of DeviceNet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2

DeviceNet Unit Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4

Comparison with Previous Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5

Outline of the Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-6

Basic Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-7

List of Usage Methods by Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2
Nomenclature and Installation . . . . . . . . . . . . . . . . . . . .

2-1

Nomenclature and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2

Installing the DeviceNet Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3
Allocated CIO and DM Words . . . . . . . . . . . . . . . . . . . .

3-1

Overview of Word Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2

Allocated CIO Area Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3

Allocated DM Area Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4
Remote I/O Master Communications . . . . . . . . . . . . . . .
4-1

Master Remote I/O Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

91
92

4-2

Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3

Fixed Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

101

4-4

User-set Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

107

4-5

Starting and Stopping Remote I/O Communications . . . . . . . . . . . . . . . . . . . . . . .

116

4-6

Example of Ladder Programming for Remote I/O Communications . . . . . . . . . . .

116

4-7

Errors that May Occur in Remote I/O Communications . . . . . . . . . . . . . . . . . . . .

118

vii

TABLE OF CONTENTS
SECTION 5
Remote I/O Slave Communications . . . . . . . . . . . . . . . . .

121

5-1

Slave Remote I/O Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

122

5-2

Fixed Allocations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

125

5-3

User-set Allocations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

126

SECTION 6
Message Communications . . . . . . . . . . . . . . . . . . . . . . . .

133

6-1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

134

6-2

FINS Commands and Responses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

141

6-3

Using FINS Message Communications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

145

6-4

Sending Explicit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

158

6-5

Receiving Explicit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

165

SECTION 7
Other Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

181

7-1

Connecting to the CX-Programmer via the DeviceNet . . . . . . . . . . . . . . . . . . . . .

182

7-2

Memory Card Backup Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

186

SECTION 8
Communications Timing . . . . . . . . . . . . . . . . . . . . . . . . .

189

8-1

Remote I/O Communications Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .

190

8-2

Message Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

196

SECTION 9
Troubleshooting and Maintenance . . . . . . . . . . . . . . . . .

199

9-1

Troubleshooting with the DeviceNet Unit Indicators . . . . . . . . . . . . . . . . . . . . . .

200

9-2

Error Log Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

218

9-3

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

222

9-4

Maintenance and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

225

Appendices
A

Allocation Differences from C200H DeviceNet Master Units . . . . . . . . . . . . . . .

229

DeviceNet Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

235

FINS Commands and Responses for DeviceNet Units . . . . . . . . . . . . . . . . . . . .

241

Memory Card Backup Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

247

Multi-vendor Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

251

DeviceNet Explicit Message Send Command for Other Manufacturer Nodes . .

261

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

263

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

267

viii

About this Manual:
This manual describes the installation and operation of CS1W-DRM21 DeviceNet Unit for SYSMAC
CJ-series PLCs and the CJ1W-DRM21 DeviceNet Unit for SYSMAC CJ-series PLCs, and includes the
sections described below.
Please read this manual and all manuals for related products carefully and be sure you understand the
information provided before attempting to install and operate the DeviceNet Unit. Be sure to read the
precautions provided in the following section.
Section 1 provides an overview of the DeviceNet network, including features, specifications, and system.
Section 2 describes the nomenclature and installation of the DeviceNet Unit.
Section 3 describes the words allocated to the DeviceNet Unit in the CIO Area and DM Area. These
words both enable controlling the DeviceNet Unit and accessing Unit and network status.
Section 4 describes the remote I/O communications performed as a master by the DeviceNet Unit.
Section 5 describes the remote I/O communications performed as a slave by the DeviceNet Unit.
Section 6 describes message communications using FINS commands sent from the ladder program
in the CPU Unit of the PC.
Section 7 describes connecting to CX-Programmer via the DeviceNet and the Memory Card backup
function.
Section 8 describes the time required for remote I/O communications and message communications.
Section 9 describes error processing, periodic maintenance, and troubleshooting procedures needed
to keep the DeviceNet network operating properly. We recommend reading through the error processing procedures before operation so that operating errors can be identified and corrected more quickly.
The Appendices provide information on allocation differences with C200H-series DeviceNet Units,
DeviceNet connections, remote programming and monitoring, Memory Card backups, FINS commands and responses, sending DeviceNet explicit message to Non-OMRON nodes, and multi-vendor
applications.
The following manuals provide information on the DeviceNet and OMRON DeviceNet products.
Manual

Products

Contents

Cat. No.

CS/CJ-series DeviceNet
Unit Operation Manual
(This manual)

CS1W-DRM21and CJ1W-DRM21
DeviceNet Units

Information on CS/CJseries DeviceNet Units.

W380

DeviceNet
Operation Manual

CVM1-DRM21-V1 DeviceNet Master Unit
C200HW-DRM21-V1 DeviceNet Master Unit
CQM1-DRT21 I/O Link Unit
DRT1-series DeviceNet Slaves
GT1-series DeviceNet Slaves

Information on C200Hseries, CVM1, and CVseries DeviceNet Units, as
well as general DeviceNet
communications specifications and wiring methods.

W267

DeviceNet Configurator
Ver. 2.
Operation Manual

WS02-CFDC1-E DeviceNet Configurator
3G8F5-DRM21 ISA Board
3G8E2-DRM21 PCMCIA Board

Information on using the
Configurator.

W382

DeviceNet Slaves Operation Manual

C200HW-DRT21
CQM1-DRT21
DRT1 Series

Information on DeviceNet
Slaves.

W347

Information on MULTIPLE
I/O TERMINALs, one type
of DeviceNet slave.

W348

DeviceNet MULTIPLE I/O DRT1-COM
TERMINAL Operation
GT1 Series
Manual

Manual

Products

Contents

Cat. No.

CS1G/H-CPU
SYSMAC CS/CJ Series
-E CPU Units
Communication ComCS1W-SCB21/41 Serial Communications
mands Reference Manual Boards
CS1W-SCU21 Serial Communications Unit

Information on FINS and
W342
Host Link commands that
can be sent to CS/CJ-series
CPU Units.

CX-Net
Operation Manual

Information on setting and
W362
monitoring networks, such
as the use of routing tables.

WS02-CXPC1-EV

!WARNING Failure to read and understand the information provided in this manual may result in per-

sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.

PRECAUTIONS
This section provides general precautions for using the DeviceNet Unit and related devices.
The information contained in this section is important for the safe and reliable application of the DeviceNet Unit
and Programmable Controller (PC) You must read this section and understand the information contained before
attempting to set up or operate a DeviceNet Unit as part of a PC.
1
2
3
4
5
6

Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
Applicable Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2
Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3
Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

xii
xii
xii
xiii
xiv
xvi
xvi
xvi
xvi

Intended Audience

Intended Audience
This manual is intended for the following personnel, who must also have
knowledge of electrical systems (an electrical engineer or the equivalent).
• Personnel in charge of installing FA systems.
• Personnel in charge of designing FA systems.
• Personnel in charge of managing FA systems and facilities.

General Precautions
The user must operate the product according to the performance specifications described in the operation manuals.
Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems, machines, and equipment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.
This manual provides information for installing and operating the DeviceNet
Unit. Be sure to read this manual before operation and keep this manual close
at hand for reference during operation.

!WARNING

It is extremely important that a PC and all PC Units be used for the specified
purpose and under the specified conditions, especially in applications that can
directly or indirectly affect human life. You must consult with your OMRON
representative before applying a PC System to the above mentioned applications.

Safety Precautions

!WARNING
!WARNING

Never attempt to disassemble a Unit or touch the inside of Unit while power is
being supplied. Doing so may result in serious electrical shock or electrocution.
Provide safety measures in external circuits, i.e., not in the Programmable
Controller (CPU Unit including associated Units; referred to as “PC”), in order
to ensure safety in the system if an abnormality occurs due to malfunction of
the PC or another external factor affecting the PC operation. Not doing so may
result in serious accidents.
• Emergency stop circuits, interlock circuits, limit circuits, and similar safety
measures must be provided in external control circuits.
• The PC will turn OFF all outputs when its self-diagnosis function detects
any error or when a severe failure alarm (FALS) instruction is executed.
As a countermeasure for such errors, external safety measures must be
provided to ensure safety in the system.
• The PC outputs may remain ON or OFF due to deposition or burning of
the output relays or destruction of the output transistors. As a counter-

xii

Operating Environment Precautions

measure for such problems, external safety measures must be provided
to ensure safety in the system.
• When the 24-VDC output (service power supply to the PC) is overloaded
or short-circuited, the voltage may drop and result in the outputs being
turned OFF. As a countermeasure for such problems, external safety
measures must be provided to ensure safety in the system.

!WARNING

The CPU Unit refreshes I/O even when the program is stopped (i.e., even in
PROGRAM mode). Confirm safety thoroughly in advance before changing the
status of any part of memory allocated to I/O Units, Special I/O Units, or CPU
Bus Units. Any changes to the data allocated to any Unit may result in unexpected operation of the loads connected to the Unit. Any of the following operation may result in changes to memory status.
• Transferring I/O memory data to the CPU Unit from a Programming
Device.
• Changing present values in memory from a Programming Device.
• Force-setting/-resetting bits from a Programming Device.
• Transferring I/O memory files from a Memory Card or EM file memory to
the CPU Unit.
• Transferring I/O memory from a host computer or from another PC on a
network.

!Caution
!Caution

Execute online edit only after confirming that no adverse effects will be
caused by extending the cycle time. Otherwise, the input signals may not be
readable.
Confirm safety at the destination node before transferring a program to
another node or changing contents of the I/O memory area. Doing either of
these without confirming safety may result in injury.

Operating Environment Precautions
Do not install the Unit in any of the following locations.
• Locations subject to direct sunlight.
• Locations subject to temperatures or humidities outside the range specified in the specifications.
• Locations subject to condensation as the result of severe changes in temperature.
• Locations subject to corrosive or flammable gases.
• Locations subject to dust (especially iron dust) or salt.
• Locations subject to exposure to water, oil, or chemicals.
• Locations subject to shock or vibration.
Provide proper shielding when installing in the following locations:
• Locations subject to static electricity or other sources of noise.
• Locations subject to strong electromagnetic fields.
• Locations subject to possible exposure to radiation.
• Locations near to power supply lines.

xiii

Application Precautions

!Caution

The operating environment of the PC System can have a large effect on the
longevity and reliability of the system. Improper operating environments can
lead to malfunction, failure, and other unforeseeable problems with the PC
System. Be sure that the operating environment is within the specified conditions at installation and remains within the specified conditions during the life
of the system.

Application Precautions
Observe the following precautions when using the DeviceNet Unit.

!WARNING

Failure to abide by the following precautions could lead to serious or possibly
fatal injury. Always heed these precautions.
• Always connect to a class-3 ground (100
Units.

!Caution

Ω or less) when installing the

Failure to abide by the following precautions could lead to faulty operation or
the PC or the system or could damage the PC or PC Units. Always heed
these precautions.
• Install double safety mechanisms to ensure safety against incorrect signals that may be produced by broken signal lines or momentary power
interruptions.
• Enable the scan list to before operating the system.
• When adding a new node to the network, make sure that the baud rate is
the same as other nodes.
• Use specified communications cables.
• Do not extend connection distances beyond the ranges given in the specifications.
• Always turn OFF the power supply to the personal computer, Slaves, and
Communications Units before attempting any of the following.
• Mounting or dismounting the DeviceNet Unit, Power Supply Units, I/O
Units, CPU Units, or any other Units.
• Assembling a Unit.
• Setting DIP switches or rotary switches.
• Connecting or wiring the cables.
• Connecting or disconnecting connectors.
• Be sure that the terminal blocks, connectors, Memory Units, expansion
cables, and other items with locking devices are properly locked into
place. Improper locking may result in malfunction.
• Be sure that all the mounting screws, terminal screws, Unit mounting
screws, and cable connector screws are tightened to the torque specified
in the relevant manuals. Incorrect tightening torque may result in malfunction.
• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction if foreign matter enters the Unit.
• Remove the label after the completion of wiring to ensure proper heat dissipation. Leaving the label attached may result in malfunction.
• Always use the power supply voltage specified in this manual.

xiv

Application Precautions

• Double-check all the wiring and connection of terminal blocks and connectors before mounting the Units.
• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals.
• Observe the following precautions when wiring the communications
cable.
• Separate the communications cables from the power lines or high-tension lines.
• Do not bend the communications cables.
• Do not pull on the communications cables.
• Do not place heavy objects on top of the communications cables.
• Be sure to wire communications cable inside ducts.
• Use appropriate communications cables.
• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied in places where the power supply
is unstable. An incorrect power supply may result in malfunction.
• Install external breakers and take other safety measures against short-circuiting in external wiring. Insufficient safety measures against short-circuiting may result in burning.
• Double-check all the wiring and switch settings before turning ON the
power supply.
• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected operation.
• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.
• Changing the operating mode of the PC.
• Force-setting/force-resetting any bit in memory.
• Changing the present value of any word or any set value in memory.
• After replacing Units, resume operation only after transferring to the new
CPU Unit and/or Special I/O Units the contents of the DM Area, HR Area,
and other data required for resuming operation. Not doing so may result in
an unexpected operation.
• When transporting or storing the product, cover the PCBs with electrically
conductive materials to prevent LSIs and ICs from being damaged by
static electricity, and also keep the product within the specified storage
temperature range.
• When transporting the Unit, use special packing boxes and protect it from
being exposed to excessive vibration or impacts during transportation.
• Do not attempt to disassemble, repair, or modify any Units.

Conformance to EC Directives

6-1

Applicable Directives
• EMC Directives

6-2

Concepts
EMC Directives
OMRON devices that comply with EC Directives also conform to the related
EMC standards so that they can be more easily built into other devices or
machines. The actual products have been checked for conformity to EMC
standards. (See the following note.) Whether the products conform to the
standards in the system used by the customer, however, must be checked by
the customer.
EMC-related performance of the OMRON devices that comply with EC Directives will vary depending on the configuration, wiring, and other conditions of
the equipment or control panel in which the OMRON devices are installed.
The customer must, therefore, perform final checks to confirm that devices
and the overall machine conform to EMC standards.
Note Applicable EMS (Electromagnetic Susceptibility) and EMI (Electromagnetic
Interference standards in the EMC (Electromagnetic Compatibility) standards
are as follows:
Unit

6-3

EMS

CS1W-DRM21

EN50082-2

CJ1W-DRM21

EN61000-6-2

EMI
EN50081-2

Conformance to EC Directives
DeviceNet products that meet EC directives must be installed as follows:
1,2,3...

1. DeviceNet Units are designed for installation inside control panels. All DeviceNet Units must be installed within control panels.
2. Used reinforced insulation or double insulation for the DC power supplies
used for the communications power supply, internal circuit power supply,
and the I/O power supplies.
3. DeviceNet products that meet EC directives also meet the common emission standard (EN50081-2). When DeviceNet products are built into equipment, however, the measure necessary to ensure that the standard is met
will vary with the overall configuration of the control panel, the other devices connected to the control panel, and other conditions. You must therefore confirm that EC directives are met for the overall machine or device,
particularly for the radiated emission requirement (10 m).
The following examples show means of reducing noise.

1,2,3....

xvi

1. Noise from the communications cable can be reduced by installing a ferrite
core on the communications cable within 10 cm of the DeviceNet Unit.

Conformance to EC Directives
Ferrite Core (Data Line Filter): 0443-164151 (manufacturered by
Fair-Rite Products Co., Ltd.)
Impedance specifications
25 MHZ:
156 Ω
100 MHZ: 250 Ω

30 mm

13 mm

33 mm

29 mm

2. Wire the control panel with as thick and short electric lines as possible and
ground to 100 Ω min.
3. Keep DeviceNet communications cables as short as possible and ground
to 100 Ω min.

xvii

SECTION 1
Features and System Configuration
This section provides an overview of the DeviceNet network, including features, specifications, and system configurations.
1-1

Overview of DeviceNet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-1

Overall System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-2

Applicable Units and DeviceNet Functions . . . . . . . . . . . . . . . . . . .

1-1-3

Masters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-4

Types of Slave. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1-5

DeviceNet Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2

DeviceNet Unit Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3-1

DeviceNet Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4

Comparison with Previous Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5

Outline of the Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5-1

Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5-2

Configurator Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Basic Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-6-1

Network Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-6-2

Hardware Preparations for Communications . . . . . . . . . . . . . . . . . .

1-6-4

Procedures Prior to Starting Communications . . . . . . . . . . . . . . . . .

List of Usage Methods by Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-6

1-7

Section 1-1

Overview of DeviceNet

1-1

Overview of DeviceNet
DeviceNet is a multi-bit, multi-vendor network that combines controls and data
on a machine/line-control level and that conforms to DeviceNet open field network specifications.
Three types of communications are supported: 1) Remote I/O master communications that automatically transfer I/O between slaves and the CPU Unit to
which a DeviceNet Unit is mounted without any special programming in the
CPU Unit, 2) Remote I/O slave communications that automatically transfer I/O
between the Master and the CPU Unit to which a DeviceNet Unit is mounted,
and 3) Message communications that read/write messages, control operation,
or perform other functions for other CPU Units to which a DeviceNet Unit is
mounted and slaves. Message communications are achieved by executing
specific instructions (SEND (192), RECV (193), and CMND (194)) from the
program in the CPU Unit to which the DeviceNet Unit is mounted.
Remote I/O master communications

Fixed allocations
User-set allocations

DeviceNet functions

Remote I/O slave communications

Fixed allocations
User-set allocations

Explicit message communications
Message communications

FINS message communications

The following functions are supported with a CS/CJ-series DeviceNet Unit.
1,2,3...

1. Without the Configurator Software Tool
a) I/O area words can be flexibly allocated for remote I/O Master and
Slave communications. Three types of fixed allocations as well as
user-set allocations through allocated DM Area words are possible.
b) More than one DeviceNet Unit can be mounted under a single PC.
c) More than one DeviceNet Unit can be connected in a single network.
With the Configurator, remote I/O can be allocated in any order, i.e.,
not necessarily in the other of node addresses.
Note The Configurator that is connected through a dedicated Board or
Card uses one node in the DeviceNet network. It does not use a
node if it is connected by a serial line.
2. A CS/CJ-series DeviceNet Unit can function as either a master or slave in
remote I/O communications. Both can be used simultaneously.
3. With a CS/CJ-series DeviceNet Unit, the DeviceNet network can be treated exactly like a Controller Link, Ethernet, or other network for message
communications or remote programming and monitoring by a CX-Programmer.

Section 1-1

Overview of DeviceNet

1-1-1

Overall System Configuration
DeviceNet Unit or
DeviceNet Master Unit
CS Series
C200HZ/HX/HG/E/HS:
CS1W-DRM21 C200HW-DRM21-V1
CJ Series
,
CVM1/CV
Series:
CJ1W- DRM21
CVM1-DRM21-V1

Photoelectric
sensors, proximity sensors, limit
switches, etc.

I/O Link
Unit

CQM1

Output Remote
Adapter (used
with Output
Block)

Output
Terminal

Solenoids,
valves, etc.

: T-branch Taps or multi-drop connections

DeviceNet Unit or
DeviceNet Master Unit

Sensor
Terminal

Input Remote
Adapter (used
with Input Block)

Input
Terminal

DeviceNet
Configurator
(personal computer)

Photoelectric
sensors or proximity sensors
with connectors

Photoelectric
sensors,
proximity
sensors, limit
switches, etc.

Environment-resistant Terminal
(Inputs, outputs,
or mixed I/O)

Solenoids,
valves, etc.

C200H I/O Link Unit

(See note.)

Analog
Input
Terminal

Analog
Output
Terminal

Temperature Input Terminal

RS-232C
Unit

Inputs

Analog sensors,
etc.

Inverters,
valves, etc.

Thermocouple,
platinum resistance
thermometer

Outputs Outputs Inputs

MULTIPLE I/O TERMINAL
Bar code
readers, etc.

Note The Configurator is required if more than one Master is connected in a single
network when a CVM1-DRM21-V1 or C200HW-DRM21-V1 is used.
Master Features
DeviceNet Master Units and DeviceNet Units
Support remote I/O communications between OMRON PCs (CS-series, CJseries, CVM1, CV-series, or C200HX/HG/HE/HS) and slaves.
Support message communications between OMRON PCs, or between an
OMRON PC and slaves and masters from other companies.
VME Master Boards
Supports remote I/O communications between a VME System and slaves.

Section 1-1

Overview of DeviceNet
Configurator Features

• Enables user-set allocations for remote I/O (choice of node address order,
2 area allocations, etc.).
• Enables serial connection to the Programming Device Port of a PC.
• Enables user settings for DeviceNet remote I/O communications connections.
• Enables multiple Masters on a single PC.
• Enables multiple Masters in a single network.
Slave Features
I/O Terminals
• Provide general-purpose I/O via terminal blocks (M3).
• Available in the following models:
• 8-point Transistor Input Terminal
• 16-point Transistor Input Terminal
• 8-point Transistor Output Terminal
• 16-point Transistor Output Terminal
Environment-resistant Terminals
• Improved I/O Terminals that conform to IP66 for spatter-, water-, and oilresistance.
• Available in the following models:
• 8-point Transistor Input Terminal
• 8-point Transistor Output Terminal
• 16-point Transistor I/O Terminal (8 inputs and 8 outputs)
Remote Adapters
• Used in combination with G70D and other I/O Blocks to handle relay outputs, power MOS FET Relay outputs, etc.
• Available in 16-point input and 16-point output models.
I/O Link Units
• More than one I/O Link Unit can be mounted to a CQM1 PC.
• Link 16 inputs and 16 outputs between the PC and the Master.
Sensor Terminals
• Accept inputs from photoelectric and proximity sensors with connectors.
• Available in 16-point input and 8-point input/8-point output models.
• Output signals can be used for sensor teaching and external diagnosis.
Analog Input Terminals
• Convert analog inputs to binary.
• Switchable between 2 and 4 input points using the DIP switch.
• Handle inputs of 0 to 5 V, 1 to 5 V, 0 to 10 V, –10 to +10 V, 0 to 20 mA, or
4 to 20 mA.
Analog Output Terminals
• Convert binary data to analog outputs.
• Provides outputs of 1 to 5 V, 0 to 10 V, –10 to +10 V, 0 to 20 mA, or 4 to
20 mA.
• Available in models with a resolution of either 1/6,000 or 1/30,000.

Section 1-1

Overview of DeviceNet
Temperature Input Terminals
• Temperature data is input as binary data for 4 inputs.

• Thermocouple and platinum resistance thermometer inputs are available.
C200H I/O Link Units
• Special I/O Slaves that mount to C200HX/HG/HE PCs and read/write
data from the Master to the specified words in the CPU Unit.
• Read and write areas specified for up to 512 bits each (32 words each).
• Any memory area words can be read or written using DeviceNet explicit
messages.
RS-232C Units
• Special I/O Slaves that provide two RS-232C ports and control I/O from
the Masters.
MULTIPLE I/O TERMINALs
• Multiple I/O Units can be combined under a Communications Unit and
treated as a single Slave.
• Special I/O Units, such as Analog I/O Units, and High-speed Counter
Units are also available.

Section 1-1

Overview of DeviceNet

1-1-2

Applicable Units and DeviceNet Functions

Remote I/O Master
DeviceNet Unit (Master)
CPU Unit

Remote I/O communications
DeviceNet

Slaves

Item
Max. No.
of Slave
nodes per
Master

Master

Model

CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21
C200HW-DRM21-V1

C200HS
CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21

63 nodes

50 nodes

63 nodes

32 nodes

63 nodes

2,048 pts (64 input /64 32,000 pts (500
words x 4 blocks)
output words) or
16,000 pts (500 input/
500 output words)

CVM1, CV Series CVM1-DRM21-V1

2,048 pts (64 input/ 64 6,400 (100 words x
output words)
4 blocks

CS Series,
C200HX/HG/HE

1,600 pts (50 input/50
output words)

Without messages:
4,800 pts
With messages:
1,600 pts

1,024 pts (32 input/32
output words)

1,280

C200HW-DRM21-V1

C200HS
Max. No.
of I/O
points per
Slave controllable by
Master

With Configurator

CVM1, CV Series CVM1-DRM21-V1
CS Series,
C200HX/HG/HE

Max. No.
of control
points per
Master

Without Configurator

CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21

CVM1, CV Series CVM1-DRM21-V1
CS Series,
C200HX/HG/HE

100 input/100 output words
32 input/32 output words

C200HW-DRM21-V1

C200HS
Remote I/
O allocation areas

CS/CJ DeviceNet
words in CIO Area,
and user-allocated
words in CIO Area,
DM Area, and other
areas.

User-allocated
words in CIO Area,
DM Area, and other
areas.

CVM1, CV Series CVM1-DRM21-V1

DeviceNet Area

CS Series,
C200HX/HG/HE

C200H DeviceNet
words in CIO Area
(including dedicated
words/ bits)

User-allocated
words in CIO Area,
DM Area, and other
areas.

CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21

C200HS

C200HW-DRM21-V1

Section 1-1

Overview of DeviceNet
Remote I/O Slave (only Units Mounted in a PC)
DeviceNet Unit (Master)
CPU Unit

IN area

OUT area

IN area

OUT area

Remote I/O communications
DeviceNet

CPU Unit
DeviceNet Unit (Slave)
Slaves

Item

Max. No. of I/O pts
per Slave

Allocation areas in
the CPU Unit to
which this Slave is
mounted

CPU Unit to
which a Slave is
mounted

Unit Model

Without the
Configurator

With the
Configurator

CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21

32 pts (1 input/
1 output word) or
3,200 pts (100
input/100 output
words)

CS Series,
C200HX/HG/HE

C200HW-DRT21

1,024 pts (32 input/32 output words)

CQM1H
CQM1 Series

CQM1-DRT21

32 pts (1 input/1 output word)

CS Series

CS1W-DRM21

CIO, WR, DM, EM, HR

CJ Series

CJ1W-DRM21

CS Series,
C200HX/HG/HE

C200HW-DRT21

CIO, DM, EM, AR, LR, T/C

CQM1H
CQM1 Series

CQM1-DRT21

CIO

4,800 pts
(100 input words x
2/100 output words
x 1)

Section 1-1

Overview of DeviceNet
Message Communications

Master

RS-232C
Interface Unit

Communications Instructions
Master

Unit model

CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21

CVM1, CV Series
CS Series,
C200HX/HG/HE

Send

Receive

FINS
commands

SEND(192)

RECV(193)

CMND(194)

CVM1-DRM21-V1

SEND(192)

RECV(193)

CMND(194)

C200HW-DRM21-V1

None

IOWR

C200HS

---

Item
Max. No. of nodes per
Master for message
communications using
FINS commands

Master model

Model

CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21

62 nodes
(Node address 0 cannot be
used in FINS communications.)

CVM1, CV Series

CVM1-DRM21-V1

8 nodes

CS Series,
C200HX/HG/HE

C200HW-DRM21-V1

8 nodes

C200HS
Max. No. of nodes per
Master for message
communications using
explicit messages

Not supported

CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21

63 nodes

CVM1, CV Series

CVM1-DRM21-V1

63 nodes

CS Series, C200HX/
HG/HE

C200HW-DRM21-V1

63 nodes

CS Series

CS1W-DRM21

CJ Series

CJ1W-DRM21

SEND(192): 267 words
RECV(193): 269 words
CMND(194): 542 bytes (starting with command code)

CVM1, CV Series

CVM1-DRM21-V1

SEND(192): 76 words
RECV(193): 78 words
CMND(194): 160 bytes
(starting with command code)

CS Series,
C200HX/HG/HE

C200HW-DRM21-V1

IOWR(223): 160 bytes (starting with command code)

C200HS
Max. message length

Capacity

Not supported

Note FINS message communications are supported between any two PCs with a
CS/CJ-series DeviceNet Unit (CS1W-DRM21/CJ1W-DRM21). They are not
supported for PCs with a C200H DeviceNet Master Unit (C200HW-DRM21-

Section 1-1

Overview of DeviceNet

V1) or a CVM1/CV-series DeviceNet Master Unit (CVM1-DRM21-V1). Refer
to 6-3 Using FINS Message Communications for details.
Communications Software Switches and Communications Status
Dedicated words in the CPU Unit are allocated for DeviceNet communications
software switches and status.
Master

1-1-3

Software
switches

Control scan list registration/clearing, remote I/O
communications start/stop, and other parameters

Status area

Enables monitoring communications errors, communications
status of Masters, registered Slave data, normal Slave data,
etc.

Masters
PC

Model

Mountable position

Master/Slave
function

Maximum number of
mountable units
With
Without
Configurator Configurator

CS Series

CS1W-DRM21
DeviceNet Unit

CPU or Expansion CPU Master and Slave 16
Rack (Classified as CPU
Bus Units)

CJ Series

CJ1W-DRM21

CPU Rack or Expansion
Rack (Classified as CPU
Bus Units)

CVM1/CV Series

CVM1-DRM21-V1
DeviceNet Master
Unit

CPU or Expansion CPU Master only
Rack (Classified as CPU
Bus Units)

CS Series

C200HW-DRM21-V1
DeviceNet Master
Unit

CPU Rack or Expansion
I/O Rack (Classified as
Special I/O Units)

C200HX/HG/HE
C200HS

1-1-4

10 or 16
10

Types of Slave
The following classifications are used for DeviceNet Slaves.
• General-purpose Slaves:
Slave with I/O functions for I/O that uses an ordinary connector connected
to a communications cable.
• Environment-resistant Slaves:
Slave with I/O functions for I/O that uses a round, waterproof connector
connected to a communications cable.
• Special Slaves:
Slave with functions not related to I/O (e.g., message communications) for
I/O that uses an ordinary connector connected to a communications
cable.

Section 1-1

Overview of DeviceNet
General-purpose Slaves (Communications Cable: Normal Square Connectors)
Name
Remote I/O Terminals
with Transistors

Appearance

I/O points

Model number

8 input points (NPN)

DRT1-ID08

8 input points (PNP)

DRT1-ID08-1

Remarks
---

16 input points (NPN) DRT1-ID16
16 input points (PNP) DRT1-ID16-1
8 output points (NPN) DRT1-OD08

---

8 output points (PNP) DRT1-OD08-1

Remote I/O Terminals
with Transistors and
3-tier Terminal Block

16 output points
(NPN)

DRT1-OD16

16 output points
(PNP)

DRT1-OD16-1

16 input points (NPN) DRT1-ID16T
16 input points (PNP) DRT1-ID16T-1
16 input points (NPN) DRT1-ID16TA
16 input points (PNP) DRT1-ID16TA-1

Remote I/O Terminals
with Transistors and
Connectors

Remote Adapters

16 output points
(NPN)

DRT1-OD16T

16 output points
(PNP)

DRT1-OD16T-1

16 output points
(NPN)

DRT1-OD16TA

16 output points
(PNP)

DRT1-OD16TA-1

8 input points+8 output points (NPN)

DRT1-MD16T

8 input points+8 output points (PNP)

DRT1-MD16T-1

8 input points+8 output points (NPN)

DRT1-MD16TA

8 input points+8 output points (PNP)

DRT1-MD16TA-1

32 input points (NPN) DRT1-ID32ML
32 input points (PNP) DRT1-ID32ML-1
32 output points
(NPN)

DRT1-OD32ML

32 output points
(PNP)

DRT1-OD32ML-1

16 input points+16
output points (NPN)

DRT1-MD32ML

16 input points+16
output points (PNP)

DRT1-MD32ML-1

16 input points (NPN) DRT1-ID16X
16 input points (PNP) DRT1-ID16X-1

16 output points
(NPN)

DRT1-OD16X

16 output points
(PNP)

DRT1-OD16X-1

Simple wiring (not necessary
to tighten multiple wires
together and wiring locations
are easy to understand)
The DRT1- D16TA(-1) does
not need a separate power
supply for internal circuits
(uses the communications
power supply).

Compact (35 x 60 x 80 mm
(W x D x H))
Connects to a Relay Terminal
through a MIL cable.
Does not need a separate
power supply for internal circuits (uses the communications power supply).

Compact (85 x 50 x 40 mm W
x D x H)
Connects to a G70D Relay
terminal and can be used for a
relay output or a power MOSFET relay output.

Section 1-1

Overview of DeviceNet
Name
Sensor Terminals

Appearance

I/O points

8 input/8 output
points (PNP)

Temperature Input
Terminals

Model number

16 input points (NPN) DRT1-HD16S

Remarks
Connected to photoelectric
and proximity sensors with
connectors

DRT1-ND16S

4 thermocouple input DRT1-TS04T
points (4 words)

Thermocouple inputs
Temperature resistance thermometer inputs

4 temperature resis- DRT1-TS04P
tance thermometer
input points (4 words)
4 input points
(4 words) or 2 input
points (2 words)

DRT1-AD04

1 to 5 V, 0 to 5 V, 0 to 10 V,
–10 to +10 V, 0 to 20 mA, or 4
to 20 mA input (switchable)
Resolution: 1/6,000

4 input points
(4 words)

DRT1-AD04H

1 to 5 V, 0 to 5 V, 0 to 10 V, 0
to 20 mA, or 4 to 20 mA input
(switchable)
Resolution: 1/30,000

Analog Output Terminals

2 output points
(2 words)

DRT1-DA02

1 to 5 V, 0 to 10 V, –10 to
+10 V, 0 to 20 mA, or 4 to
20 mA output (switchable)
Resolution: 1/6,000

CQM1 I/O Link Unit

16 internal inputs/
16 internal outputs
(between CQM1 and
Master)

CQM1-DRT21

Remote I/O communications
between PCs

CPM2A/CPM1A
I/O Link Unit

32 internal inputs/
32 internal outputs
(between CPM2A/
CPM1A and Master)

CPM1A-DRT21

Remote I/O communications
between PCs

Analog Input Terminals

Note For details on Slaves, refer to the DeviceNet (CompoBus/D) Slaves Operation
Manual (W347).

Section 1-1

Overview of DeviceNet

Waterproof and Environment-resistant Slaves (Communications Cable: Round Connectors)
Name

Appearance

Waterproof Terminals

I/O points

Model number

4 input points (NPN)

DRT1-ID04CL

4 input points (PNP)

DRT1-ID04CL-1

8 input points (NPN)

DRT1-ID08CL

8 input points (PNP)

DRT1-ID08CL-1

4 output points (NPN) DRT1-OD04CL
4 output points (PNP) DRT1-OD04CL-1

Remarks
Dust and drip-proof structure
for environmental resistance
(IP 67)
XS2 Series connector system
eliminates the need for tools
for sensor, valve or other connections.

8 output points (NPN) DRT1-OD08CL
8 output points (PNP) DRT1-OD08CL-1
Environment-resistant Terminals

8 input points (NPN)

DRT1-ID08C

8 output points (NPN) DRT1-OD08C
16 input points (NPN) DRT1-HD16C
16 input points (PNP) DRT1-HD16C-1

B7AC Interface Terminal

16 output points
(NPN)

DRT1-WD16C

16 output points
(PNP)

DRT1-WD16C-1

8 input points+8 output points (NPN)

DRT1-MD16C

8 input points+8 output points (PNP)

DRT1-MD16C-1

10 input points x 3

DRT1-B7AC

Spatter, dust and drip-proof
structure for environmental
resistance (IP 66)
XS2 Series connector system
eliminates the need for tools
for sensor, valve or other connections.

Splits 1 B7AC Unit into 3
branches.
XS2 Series connector system
eliminates the need for tools.
Dust and drip-proof structure
for environmental resistance
(IP 66)

Special Slaves (Communications Cable: Normal Square Connectors)
Name

Appearance

I/O points

Model number

Remarks

C200H I/O Link Unit

512 inputs max.
(32 words)
512 outputs max.
(32 words)

C200HW-DRT21

Supports remote I/O and
message communications
between PCs.
Max. I/O area: 512 input
points and 52 output points
Any I/O words can be allocated.

RS-232C Unit

16 inputs (1 word)

DRT1-232C2

Two RS-232C ports mounted
Data sent and received by
explicit message (151 bytes
max.)
Executes settings and control
through explicit messages.
Reflects RS-232C port status
in the input.

Programmable
Slaves

512 inputs max.
(32 words)
512 outputs max.
(32 words)

CPM2C-S100C-DRT
CPM2C-S110C-DRT

Controller that enables communications with CompoBus/
S Master.
Enables message communications using explicit messages.

Section 1-1

Overview of DeviceNet
MULTIPLE I/O TERMINAL Units
Unit

I/O
points

Words allocated
in PC memory
Input

Communications Unit None

Output

Two sta- 0 words
tus
words

Basic I/O Transistor 16 input 1 word
Units
Input Units points

0 words

16 input 1 word
points

0 words

16 input 1 word
points

0 words

16 input 1 word
points

0 words

32 input 2 words
points

0 words

16 output
points

0 words

16 output
points

0 words

16 output
points

0 words

16 output
points

0 words

32 output
points

0 words

Relay Out- 16 output Units
put
points

0 words

1 word

0 words

1 word

Transistor
Output
Units

8 output
points

I/O connections

1 word

2 words

None

M3 terminal
block

Installation

Model
number

24 VDC DIN track
(supplied
from outside)

DRT1-COM

Unit
power
supply
voltage

Remarks

---

GT1-ID16

NPN

GT1-ID16-1

PNP

Connector
(made by
MOLEX)

GT1-ID16MX

NPN

GT1-ID16MX-1

PNP

Connector
(made by
FUJITSU)

GT1-ID16ML

NPN

GT1-ID16ML-1

PNP

Connector
(D-sub, 25
pin)

GT1-ID16DS

NPN

GT1-ID16DS-1

PNP

High-density connector (made by
FUJITSU)

GT1-ID32ML

NPN

GT1-ID32ML-1

PNP

M3 terminal
block

GT1-OD16

NPN

GT1-OD16-1

PNP

Connector
(made by
MOLEX)

GT1-OD16MX

NPN

Connector
(made by
FUJITSU)

GT1-OD16ML

Connector
(D-sub, 25
pin)

GT1-OD16DS

High-density connector (made by
FUJITSU)

GT1-OD32ML

M3 terminal
block

GT1-ROS16

---

GT1-ROP08

---

GT1-OD16MX-1 PNP
NPN

GT1-OD16ML-1 PNP
NPN

GT1-OD16DS-1 PNP
NPN

GT1-OD32ML-1 PNP

Section 1-1

Overview of DeviceNet
Unit

I/O
points

Words allocated
in PC memory
Input

Special
I/O Units
(See
note.)

I/O connections

Output

Unit
power
supply
voltage

Installation

24 VDC DIN track
(supplied
from outside)

Model
number

GT1-AD04

Remarks

Inputs:
4 to 20 mA,
0 to 20 mA,
0 to 5 V,
1 to 5 V,
0 to 10 V,
–10 to 10 V

Analog
4 inputs 4 words
Input Units

0 words

M3 terminal
block

8 inputs 8 words

0 words

Connector
(made by
MOLEX)

4 outputs

0 words

4 words

M3 terminal
block

GT1-DA04

Outputs:
4 to 20 mA
0 to 5 V,
1 to 5 V,
0 to 10 V,
–10 to 10 V

4 outputs

0 words

4 words

Connector
(made by
MOLEX)

GT1-DA04MX

Outputs:
0 to 5 V,
1 to 5 V,
0 to 10 V,
–10 to 10 V

M3 terminal
block

GT1-TS04T

Sensor
types: R, S,
K, J, T, B, L

M3 terminal
block

GT1-TS04P

Sensor
types:
Pt100,
JPt100

M3 terminal
block

GT1-CT01

1 external
input
2 external
outputs

Analog
Output
Units

Temperature Input
Unit

Counter
Unit

0 words
4 inputs 4 or 8
words
(varies
4 inputs with
0 words
data format)
1 input

3 words

GT1-AD08MX

Note The front-panel indicators and other parts of Analog Input Units, Analog Output Units, and Counter Units differ from those of other I/O Units. These Units
belong to a group called Special I/O Units.
One I/O Unit Connecting Cable (cable length 40 mm) is included with each I/O
Unit. One end connector is attached to the Communications Unit.
I/O Unit Connecting Cables with a cable lengths of 0.1, 0.3, 0.4, 0.6, and 1 m
(GCN1-010/030/040/060/100) are sold separately (see below).

Length

Note For details on MULTIPLE I/O TERMINAL Units, refer to the DeviceNet (CompoBus/D) MULTIPLE I/O TERMINAL Operation Manual (W348).

Section 1-2

DeviceNet Unit Features

1-1-5

DeviceNet Configurator
Use version 2 of the DeviceNet Configurator for the CS1W-DRM21/CJ1WDRM21 DeviceNet Unit. Earlier versions of the DeviceNet Configurator do not
support the CS1W-DRM21 DeviceNet Unit.

Product
name
DeviceNet
Configurator
(Ver. 2)

Model
WS02-CFDC1-E

Components

Network connection
to computer

Installation disk
(CD-ROM)

Any of the following:
• Serial connection
• PCMCIA Card
• ISA Board
(See the table below.)

Applicable
computer

IBM PC/AT or
compatible

Windows 95, 98,
Me, NT4.0, or
2000

Note The following Boards and Cards can be used.
Model

Components

3G8F5-DRM21

Dedicated ISA Board with
DeviceNet Configurator (Ver. 2)

3G8E2-DRM21

Dedicated PCMCIA Card with
DeviceNet Configurator (Ver. 2)

Applicable
computer

IBM PC/AT or
compatible

Windows 95, 98, or
NT4.0
Windows 95 or 98

Note Use DeviceNet Configurator version 2.10 or later for the CJ1W-DRM21.

1-2

DeviceNet Unit Features
The following are features of the CS-series and CJ-series DeviceNet Units
(CS1W-DRM21 and CJ1W-DRM21).

Multi-vendor Network

Devices made by other companies (masters or slaves) can be connected to
DeviceNet because it conforms to open field network specifications. By using
a combination of valves, sensors, and other DeviceNet products, the network
can be adapted to various field-level applications.

Simultaneous Remote I/O
Communications and
Messaging Services

Remote I/O communications that constantly transfer I/O between a DeviceNet
Unit and slaves as well as message communications where the DeviceNet
Unit sends and receives data as needed can both be executed simultaneously. When a DeviceNet network is constructed, this feature ensures the
network will be able to handle applications that require the free flow back and
forth of bit data and message data. FINS commands can be executed along
with DeviceNet explicit messages in message communications.
Remote I/O Communications
CS/CJ-series DeviceNet
Unit (master)

Remote I/O (master)
function

DeviceNet

Slave

Note Refer to SECTION 4 Remote I/O Master Communications for details on
remote I/O communications.

Section 1-2

DeviceNet Unit Features
Explicit Message Communications
CS/CJ-series
DeviceNet Unit

Explicit message

DeviceNet

RS-232C
Slave

CS/CJ-series
DeviceNet Unit

Note Refer to 6-4 Sending Explicit Messages for details on remote I/O communications.
FINS Message Communications
CS/CJ-series
DeviceNet Unit

FINS message

DeviceNet

Slave

CS/CJ-series
DeviceNet Unit

Note Refer to 6-3 Using FINS Message Communications for details on FINS communications.
User-set allocations
without the Configurator

With CS/CJ-series DeviceNet Units, remote I/O communications can be allocated in any area without the Configurator simply by using DM Area settings.
If the Configurator is used, it allows you to change the node address order for
more flexible I/O allocations. This feature ensures the proper I/O allocations
for any application and it makes effective use of PC memory by simplifying
programming.

Note Refer to 4-4 User-set Allocations for details.
Slave Functions

CS/CJ-series DeviceNet Units can be used as both masters and slaves, and
master and slave communications can be executed either separately or simul-

Section 1-2

DeviceNet Unit Features

taneously. A Unit that is used as a slave supports fixed and user-set allocations. The maximum I/O for the slave function is 100 words.
CS/CJ-series DeviceNet Unit
(Master)
Master PC

DeviceNet
CS/CJ-series
DeviceNet Unit (Slave)
Slave PC

64 nodes max.

Note Refer to SECTION 5 Remote I/O Slave Communications for details.
Configurator Connection
through a Serial Line

The Configurator can also be connected either as a DeviceNet node or to a
serial port on a CPU Unit or a Serial Communication Unit/Board.
CS/CJ-series DeviceNet Unit
(Master)
CPU Unit

Configurator

Scan list registration
Serial connection
(Host Link or Peripheral Bus)
DeviceNet

Section 1-2

DeviceNet Unit Features
CX-Programmer
Programming and
Monitoring of DeviceNet
Slave PCs (Ver. 2.1 or
Later)

CX-Programmer Ver. 2.1 connected to a serial communications port on a
DeviceNet PC can be used to remotely program and monitor other DeviceNet
PCs (i.e., PCs with a CS/CJ-series DeviceNet Unit or a Programmable Slave).

CS/CJ-series DeviceNet
Unit (master)

CX-Programmer

Serial line (Host Link
or peripheral bus)

CS/CJ-series DeviceNet
Unit (master)

DeviceNet

Programmable
Slave

CS/CJ-series
Ethernet Unit

CS/CJ-series DeviceNet
Unit (master)

CX-Programmer

Ethernet

DeviceNet

CS/CJ-series DeviceNet
Unit (master)

Programmable
Slave

Note Refer to 7-1 Connecting to the CX-Programmer via the DeviceNet for details.
Inter-network Connections

FINS messages can be sent back and forth between DeviceNet and other
networks (e.g., Controller Link, SYSMAC LINK, and Ethernet). This feature
enables seamless message communications between all types of networks,
including DeviceNet.

Controller Link Unit

Controller Link

Controller Link Unit
CS/CJ-series DeviceNet Unit

FINS message
DeviceNet
CS/CJ-series
DeviceNet Unit

Note Refer to 6-3 Using FINS Message Communications for details.

Section 1-2

DeviceNet Unit Features
Multiple PCs in a Single
Network

Multiple DeviceNet Units can be connected in a single network for message
communications between PCs as well as for remote I/O communications
between PCs and slaves in multiple groups. This feature allows a DeviceNet
to be used as a common bus that can integrate all types of control with less
wiring.
CS/CJ-series
DeviceNet Unit (Master)

CS/CJ-series DeviceNet Unit
(Master)

Master PC

CS/CJ-series
DeviceNet Unit
(Slave)

DeviceNet

Slave PC

Remote I/O

Note Refer to 4-1 Master Remote I/O Communications for details.
Multiple DeviceNet Units
on a Single PC

Up to 16 CS/CJ-series DeviceNet Units can be mounted to a single PC. This
feature enables greater DeviceNet remote I/O control capacity and ensures
that DeviceNet can easily handle line expansion as well as other applications.

CS/CJ-series DeviceNet Unit
(master) (See note 1.)

DeviceNet

CS/CJ-series DeviceNet Unit
(master)

DeviceNet

CS/CJ-series DeviceNet Unit
(slave) (See note 2.)
CS/CJ-series DeviceNet Unit
(master) (See note 1.)

DeviceNet
DeviceNet

DeviceNet

Note

1. Multiple Units can be mounted without the Configurator.
2. DeviceNet Units set as both slaves and/or masters can be mounted at the
same time.
3. Refer to 4-1 Master Remote I/O Communications for details.

DeviceNet Unit Setup Files
(Memory Card Backup)

Setup data (e.g., scan lists) in a DeviceNet Unit can be written as a file to the
Memory Card mounted in a CPU Unit. This feature greatly simplifies
DeviceNet Unit replacement. A DeviceNet Unit device parameter file (same as
data setup file) that is prepared offline using the Configurator can be saved on
a Memory Card, and setup data from the Memory Card can be downloaded to

Section 1-2

DeviceNet Unit Features

a DeviceNet Unit. (See Appendix D Memory Card Backup Function for more
details.)
CS/CJ-series DeviceNet Unit

Configurator

CPU Unit
Memory Card
File save
File load
Loads setup data to a DeviceNet Unit using a
software switch in CIO Area of the CPU Unit.

Note Refer to 7-2 Memory Card Backup Functions for details.
Various Connection
Methods

Normal multi-drop, T-branch multi-drop (with up to three branches), and daisychain line connections are available. These methods can be combined to construct a flexible system that suits the floor layout.

Maximum Network Length
of 500 m

A network can connect up to 63 Slaves and can handle remote I/O communications of up to 2,000 byes (16,000 points without the Configurator) per
DeviceNet Unit. A maximum network length of 500 m is possible with a baud
rate of125 Kbps using thick cable.

High-speed
Communications

High-speed communications are possible at up to 500 Kbps for a trunk line
length of 100 m.

Compatibility with Slow
Slaves

The communications cycle time can be set even without the Configurator so
slaves with slow response times can be used.

A Wide Variety of Slaves

A wide variety of I/O devices, like Remote I/O Terminals, Environment-resistant Terminals, Remote Adapters, Sensor Terminals, Temperature Input Terminals, CQM1 I/O Link Units, Analog I/O Terminals, C200H I/O Link Units,
RS-232C Units, MULTIPLE I/O TERMINALs, Temperature Adjusters, Inverters, and Intelligent Plugs can be used as slaves.

Section 1-3

Specifications

1-3

Specifications

1-3-1

DeviceNet Unit

Model
Applicable PC
CS Series

Unit classification
CPU Bus Unit

CJ Series

General Specifications

Types of communications

Model number

• Remote I/O communications master (fixed CS1W-DRM21
or user-set allocations)
• Remote I/O communications slave (fixed
CJ1W-DRM21
or user-set allocations)
• Message communications

General specifications of the CS/CJ-series DeviceNet Unit conform to the
general specifications for the SYSMAC CS/CJ-series CPU Units.

Functional and Performance Specifications
Item

Specification

DeviceNet Unit model

CS1W-DRM21

CJ1W-DRM21

Applicable PC

CS Series

CJ Series

Unit classification

CPU Bus Unit

Applicable unit numbers

0 to F

Mounting position

CPU Rack, CS Expansion Rack
(Cannot be mounted to a C200H
Expansion I/O Rack or SYSMAC
BUS Slave Rack.)

No. of Masters that can
be mounted

Fixed allocations
User-set allocations

CPU Rack or Expansion
Rack

3 Units max. (Unique words must be allocated using the Allocated CIO Area Words Software Switches.)
By allocated
DM Area words

16 Units max. (Unique words must be allocated using the user
setup tables in the allocated DM Area words.)

By Configurator 16 Units max. (Unique words must be allocated using the Configurator.)
No. of Slaves Fixed allocations
that can be
mounted
User-set allocations

3 Units max. (Unique words must be allocated using the Allocated CIO Area Words Software Switches)
By allocated
DM Area words

16 Units max. (Unique words must be allocated using the user
setup tables in the allocated DM Area words.)

By Configurator 16 Units max. (Unique words must be allocated using the Configurator.)
No. of Units that can be connected per network

64 Units max.

Section 1-3

Specifications
Item
Words allocated in the
CPU Unit

DeviceNet When
remote I/O used as
communi- a Master
cations
When
used as
a Slave

Specification
Fixed allocations

User-set alloca- Any I/O memory (Set using the allocated DM Area words or Contions
figurator.)
Fixed allocations

Fixed words in the CS/CJ-series DeviceNet Area in the CIO Area
(one of three settings).

User-set alloca- Any I/O memory words (Set in allocated DM Area words or Contions
figurator.)

CIO Area words allocated for the CPU
Bus Unit

25 words/Unit (allocation for one Unit)

DM Area words allocated for the CPU
Bus Unit

100 words/Unit (allocation for one Unit)

Other I/O memory

Set the allocation size table for all slaves in any area when
remote I/O communications is set to user-set allocations from the
setting in the allocated DM Area words.

Item
Supported connections (communications)

Fixed words in the CS/CJ-series DeviceNet Area in the CIO Area
(any of three settings).

CPU Unit to DeviceNet Unit: 9 words for the software switches, 6
words for the status area, 8 words for the registered slaves and
normal slaves tables
Scan List User Setup Table, Slave User Setup Table, Master I/O
Allocation Reference Table, Slave I/O Allocation Reference
Table, Detailed Slave Status Table, etc.
CPU Unit to DeviceNet Unit: Table for communications cycle time
settings

Specifications
• Remote I/O communications (master and slave): Master/slave
connection (poll, bit-strobe, COS, cyclic)
• Explicit message and FINS message communications: Explicit
connection
All conform to DeviceNet communications standards.

Section 1-3

Specifications
Item
Remote I/O Slave allocation method
master communications

Specifications
Fixed allocations

Select one of the following fixed allocation areas using the Fixed
Allocated Area Switches 1, 2, and 3 in the software switches in
the allocated CIO Area words.
Allocated
words
(CIO
Area)

I/O

Size

Fixed
Allocation
Area
Setting
1

Fixed
Allocation
Area
Setting
2

Fixed
Allocation
Area
Setting
3

Output
(OUT)
area

64 words

3200 to 3400 to
3263
3463

3600 to
3663

Input (IN)
area

64 words

3300 to 3500 to
3363
3563

3700 to
3763

Select one of the above areas using the software
switches. All are fixed at 1 word per node address.
The default setting is Fixed Allocation Area Setting 1.
User-set
allocations

By allocated DM
Area
words

Set the areas and the first words for the OUT 1 and
IN 1 blocks in the Scan List Setup Table in the allocated DM Area words. Set the allocation size for
each slave using the Allocation Size Setup Table
(any words). Allocations must be in the order of node
addresses.
Allocated
words

The input and output areas can be the
following sizes starting from any word in
any of the following areas: CIO Area,
WR Area, HR Area, DM, Area, or EM
Area.
Output
(OUT)
area

500 words max. × 1 block

Input (IN)
area

500 words max. × 1 block

By Config- Set the areas for the OUT 1/2 and IN 1/2 blocks, the
urator
first words, and the allocation sizes for all slaves
using the Configurator. Blocks can be set for nodes
in any order.
Allocated
words

The input and output areas can be the
following sizes starting from any word in
any of the following areas: CIO Area,
WR Area, HR Area, DM, Area, or EM
Area.
Output
(OUT)
area

500 words max. × 2 blocks

Input (IN)
area

500 words max. × 2 blocks

Section 1-3

Specifications
Item
Remote I/O
master

Max. No. of Slaves connected per DeviceNet Unit

Specifications
Fixed allocations
User-set
allocations

63 nodes

By allocated DM
Area
words
By Configurator

Max. No. of I/O points per
DeviceNet Unit

Fixed allocations

2,048 pts (64 input words, 64 output words)

User-set
allocations

16,000 pts (500 input words x 1 block, 500 output
words x 1 block)

By allocated DM
Area
words

By Config- 32,000 pts (500 input words x 2 blocks, 500 output
urator
words x 2 blocks)
Max. No. of I/O per Slave
Fixed allocations
controllable by a DeviceNet User-set
By alloUnit
allocations cated DM
Area
words

2,048 pts (64 input words, 64 output words)
3,200 pts (100 input words, 100 output words)

By Config- 3,200 pts (100 input words, 100 output words)
urator

Section 1-3

Specifications
Item
Remote I/O
slave

Allocation method

Specifications
Fixed allocations

Select one of the following fixed allocation areas using the Slave
Fixed Allocated Area Switches 1, 2, and 3 in the software
switches in the allocated CIO Area words.
Allocated
words
(CIO
Area)

Fixed
Allocation
Area
Setting
1

Fixed
Allocation
Area
Setting
2

Fixed
Allocation
Area
Setting
3

1 word
Output
(OUT)
area to the
slave from
the master

3370

3570

3770

1 word
Input
(OUT)
area to the
master
from the
slave

3270

3470

3670

I/O

Size

Note Select one of the preceding areas using the software
switches. All are fixed at 1 word per node address. The
default setting is Fixed Allocation Area Setting 1.
User-set
allocations

By allocated DM
Area
words

Set the areas, the first words, and slave allocation
size for the OUT 1 and IN 1 blocks (total of 2 blocks)
using the Slave User Allocation Setup Table in the
allocated DM Area words.
Allocated
words

The input and output areas can be the
following sizes starting from any word in
any of the following areas: CIO Area,
WR Area, HR Area, DM, Area, or EM
Area.
Output (OUT) area from this
slave

100
words

Input (IN) area to this slave

100
words

By Config- Set the areas for the OUT 1/2 and IN 1/2 blocks, the
urator
first words, and the slave allocation sizes using the
Configurator.
Allocated
words

Max. No. of I/O points per
DeviceNet Unit slave

The input and output areas can be the
following sizes starting from any word in
any of the following areas: CIO Area,
WR Area, HR Area, DM, Area, or EM
Area.
Output (OUT) area from this
slave

100
words

Input (IN) area to this slave

100
words

Fixed allocations

32 points (1 input word, 1 output word)

User-set
allocations

3,200 pts (100 input words, 100 output words)

By allocated DM
Area
words

By Config- 4,800 pts (100 input words x 2, 100 output words
urator
x 1)

Section 1-3

Specifications
Item

Specifications

Default settings

•
•
•
•
•
•

Scan list: Not supported
Master communications: Supported
Slave communications: Disabled
Remote I/O communications: Start
Master fixed allocations: Fixed Allocation Area Setting 1
Slave fixed allocations: Fixed Allocation Area Setting 1

Data stored in non-volatile memory (EEPROM) in the
DeviceNet Unit

Saves the following data settings (same as the backup file on the
Memory Card).
• Master scan list
• Slave scan list
• Message monitoring timer list (monitoring time for explicit message responses)
• Communications time settings
• Master/Slave enabled

Applicable connections

• The DeviceNet Unit automatically selects the applicable connection.
• The user can also specify poll, bit-strobe, COS (change of
state) or cyclic for the applicable connection of each slave using the Configurator. Up to two types of connections can be set
for each Slave (although COS and cyclic cannot be specified simultaneously).

Communications cycle time

Uses values calculated using the following equations to derive
default value.
Example: 16 Input Slaves (16 points each), 16 Output Slaves
(16 points each), and a baud rate of 500 Kbps: 9.3 ms
The user can set a value within a range from 2 to 500 ms. However, the calculated value is only enabled when the calculated
value from the conditions equation is greater than the setting.
Note Uses the default value calculated using 1 input word and
1 output word even for missing nodes when the scan list
is disabled.

Message
Max. No. of nodes for message commu- FINS message comcommunica- nications per DeviceNet Unit
munications (Node
tions
address 0 cannot be
used in FINS communicatins.)

Execution commands

62 nodes

Note FINS message communications using
SEND/RECV are
not supported on
PCs to which a
C200H DeviceNet
Master Unit or a
CVM1/CV
DeviceNet Master
Unit is mounted.
Explicit message
are supported however.

Send explicit messages

63 nodes

FINS commands to
send/receive data

SEND/RECV instructions

Any FINS commands

CMND instruction

Sending and receiving FINS commands Executes FINS commands from a host computer to a PC (to
connected through a serial line
which a CS/CJ-series DeviceNet Unit is mounted) on DeviceNet
through Host Link connections. A PC can also send unsolicited
FINS commands over DeviceNet to a host computer connected
through Host Link.
Inter–network communica- Same type Allows transmission across the same type of networks between
tions
of network DeviceNet networks when multiple Units are mounted (can cross
up to three levels).
Allows transmission across different types of networks between
Different
type of net- DeviceNet and other networks (e.g., Controller Link, SYSMAC
LINK and Ethernet) (can cross up to three levels).
work

Section 1-3

Specifications
Item
Other functions

Specifications

Remote programming/monitoring functions

A CX-Programmer connected to the serial communications port
of a PC to which a CS/CJ-series DeviceNet Unit is mounted can
remotely program and monitor DeviceNet slave PCs with a CS/
CJ-series DeviceNet Unit mounted. Either the peripheral port or
built-in RS-232C port can be used with the Host Link or peripheral bus protocol. (Scheduled for CX-Programmer Ver. 2.1 or
later)
Note 1. Serial ports on a Serial Communications Board/Unit
can be used in addition to the ports on the CPU Unit.
2. Inter-network communications across up to 3 levels is
possible (even over different types of network).
3. This is also possible from a CX-Programmer on network.

Operation from the Configurator connected through a serial line

Allows all online monitoring and setup functions to be performed
on a master PC on the DeviceNet network from the Configurator
connected through a serial line (scan list registration, communications parameter settings, etc.).

Memory Card backup function

Allows DeviceNet Unit data settings (scan list, communication
cycle time settings, etc.) to be backed up as a file to a Memory
Card in the CPU Unit. The data settings can also be restored into
the DeviceNet Unit from the Memory Card in the CPU Unit. Setting data can be restored into a DeviceNet Unit simply by carrying the Memory Card to the site if the device parameter file
prepared from the Configurator is saved to Memory Card from a
PC.

Error history in the DeviceNet Unit

Supported. (The history can be accessed up by the Configurator
or using a FINS command.)

Communications cycle time setting

Supported (in the allocated DM Area words or from the Configurator).

Message monitoring timer

Sets the response monitoring time (explicit connection opening
interval) in the DeviceNet Unit for explicit message communications. Settings can be made separately for all targeted devices
using the Configurator.

COS/cyclic heartbeat timer setting

Sets the minimum SEND interval in COS or cyclic connections
for all targeted devices. The setting is made using the Configurator.

Device data check function

Performs a comparison check on the following device data when
slave data registered in the scan list is compared with actual
slave data. The Configurator can be used to set this function for
all targeted Slaves.
Vendor, device type and product code

Configurator connection method

1) Serial connection (peripheral bus or Host Link)
2) Direct DeviceNet connection through a dedicated Board/Card
The online functions available are the same for both 1) and 2).

Setting section

Rotary switches:
Unit No. (hexadecimal x 1), node address (decimal x 2)
Front panel DIP switch: Baud rate, stop or continue communications when an error occurs

Display section

Two LED indicators (2 colors): Display Unit and network status.
Two-digit 7-segment display: Displays the DeviceNet Unit node
address, error code, and node address where an error occurred.
2 dot LED indicators: Display whether the registration scan list is
enabled or not.

Front connector

One communications connector (communications data: CAN H
and CAN L, communications power supply: V+, V–, shielded)
Use the XW4B-05C1-H1-D connector provided to connect the
communications cable.
Note Use the XW4B-05C4-T-D connector sold separately for
multi-drop connections.

Section 1-3

Specifications
Item

Specifications

Communications power supply voltage

11 to 25 VDC (supplied from the communications connector)

Influence on CPU Unit cycle time

0.7 ms+0.001 x the number of words allocated

Current consumption

CS1W-DRM21:
Communications power supply: 30 mA at 24 VDC, (supplied from
the communications connector)
Internal circuit power supply: 290 mA max. at 5 VDC (supplied
from the Power Supply Unit)

CJ1W-DRM21:
Communications power supply: 18 mA at 24 VDC, (supplied from
the communications connector)
Internal circuit power supply: 290 mA max. at 5 VDC (supplied
from the Power Supply Unit)
External dimensions

CS1W-DRM21: 35 x 130 x 101 mm (W x H x D)
CJ1W-DRM21: 31 x 90 x 65 mm (W x H x D)

Weight

CS1W-DRM21: 172 g (including the connector provided)
CJ1W-DRM21: 118 g (including the connector provided)

Standard accessories

One XW4B-05C1-H1-D connector to connect to a node from a Tbranch Tap.

1-3-2

Comparison between CS1W-DRM21 and CJ1W-DRM21
Only the following items are different between the CS1W-DRM21 and the
CS1W-DRM21. Otherwise, these Units are functionally the same.
Item

CS1W-DRM21

CJ1W-DRM21

Consumption current

Communications power
supply: 30 mA at 24 VDC

Communications power
supply: 18 mA at 24 VDC

External dimensions

35 x 130 x 101 mm
(W x H x D)

31 x 90 x 65 mm
(W x H x D)

Weight (including connector) 172 g

118 g

Section 1-4

Comparison with Previous Models

1-4

Comparison with Previous Models
The following table provides a comparison between the CS1W-DRM21
DeviceNet Unit and the C200HW-DRM21-V1 DeviceNet Master Unit used in a
CS/CJ-series PC.
Item

C200HW-DRM21-V1

CS1W-DRM21/CJ1W-DRM21

Unit classification

C200H Special I/O Unit

Mounting position

CPU Rack, C200H I/O Expansion Rack, CS- CPU Rack, CS/CJ-series Expansion Rack
series Expansion Rack

No. of Masters that can
be mounted

1 Master

Fixed allocations

User-set allo- 16 Masters (Configurator required)
cations

CPU Bus Unit

3 Masters (Select unique words must be
allocated using the software switches.)
3 Slaves (Select unique words must be allocated using the software switches.)
16 Masters (even without the Configurator)

Routing table registration

Not necessary

When creating a routing table, registration in
a local network table is necessary.

Unit No. that can be set

0 to F

Masters on a single network

Multiple Masters, Configurator required

Multiple Masters even without the Configurator

Remote I/O
Master
communicaSlave
tions
Message communications

❍

Registration in the scan list
when using only message
communications
Area used to
exchange
data with the
CPU Unit
(not including remote I/
O allocation)

Allocated
CIO Area
words

Explicit message send, FINS message com- Explicit message send, FINS message communications
munications
Note Can send and receive explicit messages to the PC to which a C200H
DeviceNet Master Unit or CVM1/CV
DeviceNet Master Unit is mounted.
Cannot sent or receive FINS messages.
Required

Not required

2,000 to 2,009 + (10 x unit number)

1,500 to 1,524 + (25 x unit number)

Allocated DM Not used
Area words

D30000 to D30099 (100 x unit number)

Dedicated
DM area

Not used.
Note With user-set allocations using the
allocated DM Area words however,
the Allocation Size Setup Table must
be allocated to a position in I/O memory.

D06032 to D06033 + (2 x unit number)

Comparison with Previous Models
Item
Remote I/O
communications Master

Fixed allocations

C200HW-DRM21-V1

Section 1-4
CS1W-DRM21/CJ1W-DRM21

C200H DeviceNet words in CIO Area
1,600 points (50 input words, 50 output
words)

CS/CJ-series DeviceNet words in CIO Area
2,048 points (64 input words, 64 output
words)

Output area: CIO 0050 to CIO 0099
Input area: CIO 0350 to CIO 0399

Select one of the following using the software switch.
Output area: (1) CIO 3200 to CIO 3263
(2) CIO 3400 to CIO 3463
(3) CIO 3600 to CIO 3663
Input area: (1) CIO 3300 to CIO 3363
(2) CIO 3500 to CIO 3563
(3) CIO 3700 to CIO 3763

Node addresses: 0 to 49, node address
order, 1 word/node address

Node addresses: 0 to 63, node address
order, 1 word/node address

• Slaves with 8 points: Require 1 word even though they are allocated the rightmost byte
(requires 1 node address)
• Slaves with 16 points: Require 1 word (require 1 node address)
• Slaves with over 16 points: Require multiple words (require multiple node addresses)
User-set allo- Set by the Configurator.
cations

Set from allocated DM Area words (Master
User Allocation Setup Table) or the Configurator.

When using the message communications
function:
1,600 pts max. (800 input words, 800 output
words)
When not using the message communications function:
4,800 pts max. (2,400 input words, 2,400
output words)

When set from allocated DM Area words:
16,000 pts max. (8,000 input words, 8,000
output words)
When set from the Configurator:
32,000 pts max. (16,000 input words, 16,000
output words)

The following areas can be set:
CIO: 0000 to 0235, 0300 to 0511
CIO: 1000 to 1063
HR: HR000 to HR099
DM: D00000 to D05999

The following areas can be set:
CIO: 0000 to 6143
WR: W000 to W511
HR: HR000 to HR511 words
DM: D00000 to D32767
EM: E00000 to E32767 (Banks 0 to C supported)

OUT 1, OUT 2, IN 1, and IN 2, for a total of 4
blocks can be set at any size (total for 1 to 4
blocks) at any position in the allocation
areas given above.
Any node addresses can be set within a
block.

Any position in the allocation areas given
above.
Using allocated DM Area words: Total of two
block, OUT 1 and IN 1.
Using the Configurator: A total of 4 blocks,
OUT 1, OUT 2, IN 1, and IN 2

With a total of 4 blocks and a maximum of
100 words per block, the maximum number
of words is 100 using message communications and 300 without using the message
communications.

500 words max. per block
Using allocated DM Area words:
1,000 words total for 2 blocks
Using the Configurator:
2,000 words total for 4 blocks

Maximum of 32 input words, 32 output
words per slave.

Using 2 connections:
Maximum of 200 input words, 100 output
words per slave.
Using 1 connection:
Maximum of 100 input words, 100 output
words per slave.

There are the following restrictions.
• The bytes 7 to 15 cannot be used for start bytes for slaves with more than 8 points.
• More than one master cannot share a slave.
• Slaves with 8 points: Require the leftmost or rightmost byte (does not require 1 word)
• Slaves with 16 points: Require 1 word
• Slave with over 16 points: Require multiple words (the last byte will be the rightmost byte
with an odd number of bytes)

Section 1-4

Comparison with Previous Models
Item

C200HW-DRM21-V1

Remote I/O
communications Master

Max. No. of
slaves connected

With no Configurator (fixed allocations):
50 nodes

Remote I/O
Slave

Fixed allocations

CS1W-DRM21/CJ1W-DRM21
63 nodes for fixed or user-set allocations

With no Configurator (user-set allocations):
63 nodes
DeviceNet words in CIO Area: 32 points
(1 input word, 1 output word)
Select one of the following:
Input area to the Slave:
(1) CIO 3370, (2) CIO 3570, (3) CIO 3770
Output area from the Slave:
(1) CIO 3270, (2) CIO 3470, (3) CIO 3670

User-set allo- No
cations

Set in the allocated DM Area words or the
Configurator.
The following areas can be set:
CIO: CIO 0000 to CIO 6143
WR: W000 to W511
HR: HR000 to HR511
DM: D00000 to D32767
EM: E00000 to E32767 (Banks 0 to C supported)
Using the allocated DM Area words:
Can create OUT 1 and IN 1 for a total of 2
blocks.
Using the Configurator:
Can create OUT 1, OUT 2, IN 1, and IN 2 for
a total of 4 blocks.
100 words max. per block
Using the allocated DM Area words: 200
words total for 2 blocks
Using the Configurator: 300 words total for 3
blocks

Message
communications

Configuration connection method

Execute com- Sending/receiving data: No
mands
Any FINS command: IOWR instruction

Sending/receiving data: SEND/RECV
instructions
Any FINS command: CMND instruction

Max. No. of
nodes for
message
communications

8 nodes

63 nodes

Gateway
function from
serial communications

Not supported

Allows the CX-Programmer connected by a
serial line to remotely control and monitor a
PC on the DeviceNet (scheduled for Ver.
2.1).

Inter-netNot supported
work function

Supported
Allows inter-network communications
between DeviceNet and networks like Controller Link and Ethernet (3 levels max.).

Serial connection

Not supported

Supported (Peripheral Bus or Host Link connection to a CPU Unit or a Serial Communication Board/Unit)

Direct connection to
DeviceNet

Supported

Specifies I/O communications start/stop
after each slave on the scan list starts
(nodes that perform explicit message communications must also be registered in the
scan list).

Sets Master start/stop (using a software
switch or the Configurator).
Performs I/O communications only with
slaves registered in the scan list. (Explicit
message nodes do not have to be registered
in the scan list.)

I/O communications at startup

Section 1-4

Comparison with Previous Models
Item

C200HW-DRM21-V1

CS1W-DRM21/CJ1W-DRM21

Starting and stopping remote Starts or stops remote I/O communications using the Configurator or the software switch
from a Programming Device.
communications during I/O
communications
Remote I/O communications Sets remote I/O communications start or stop when an error occurs in master communicawith a communications error tions (set on DIP switch on the front of the Master).
Communications parameters Can be changed (communications cycle time).
Sending explicit messages
to slaves made by another
company

Supported

Master error history

Yes (Can be read by the Configurator or FINS command.)

Setting communications
cycle time

Supported (by the Configurator)

Supported (with or without the Configurator)

Monitoring current communi- Supported
cations cycle time
Switch that disables commu- The switch that cancels communications
nications error stoppage
error stoppage is different from the one that
starts remote I/O communications.

The same software switch is used to cancel
communications error stoppage and to start
remote I/O communications.

Error with multiple Units
mounted

An error does not occur even with multiple
Units mounted. Operation will continue even
if the same words are allocated to more than
one Unit.

Error code on
the front
panel 7-segment display

A mounting error occurs with fixed allocations.

Error with
Display: E4
multiple Units
mounted
PC initialization error

Display: F5

RAM error

No check for multiple mounted Units.

Used more detailed error codes in initialization phase. Display: H .

Display: F5

Changed to H3 (related to the above).

Incorrect
Display: F5
switch setting

Changed to H5 (related to the above).

Routing table Display: E5
error

Changed to HC (related to the above).

PLC Unit
WDT error

Display: All lit

Display: E7 Unit does not reset. Explicit
server functions run.

EEPROM
error

Display: F8 Stops operation to store the
scan list.

Display: E3 Operation continues for error
history only (scan list stored in flash ROM)

Configuration data
error (scan
list SUM
error)

Display: E8 Continues operation in DISABLED mode.

Display: F7 Stops remote I/O communications in Master communications.

Section 1-5

Outline of the Configurator

1-5

Outline of the Configurator
Allocations for remote I/O communications can be set in any order of node
addresses from the Configurator. Users can also set remote I/O communications connections.
Device (master/slave) registration, I/O allocations, and other operations are
especially easy to perform because of graphic operations, including dragging
and dropping icons.
Any of the following methods can be used to connect the Configurator to
DeviceNet. All the connection methods support the same online connection
functions.
Connection from Dedicated Board/
Card Installed in Computer

Serial Connection from COM
port of Computer

WS02-CFDC1-E
Configurator

ISA Board or PCMCIA Card

WS02-CFDC1-E
Configurator
CS/CJ-series
DeviceNet Unit

COM port
Peripheral bus or Host Link
Peripheral or RS-232C port of
CPU Unit or RS-232C port of
Communications Board/Unit

DeviceNet Network

DeviceNet network
The Configurator is treated as a single
DeviceNet node.

1-5-1

The Configurator is not treated as a
single DeviceNet Node.

Models

Product

Configurator
(Ver. 2. )

Model

Contents

WS02-CFDC1-E

Installation disk
(CD-ROM)

Method of connecting
personal computer to
network
Either one of the following
methods
• Serial connection
• Dedicated PCMCIA Card
• Dedicated ISA Board
(see table below)

Personal
computer
IBM PC/AT or
compatible

Windows 95,
98, Me, NT4.0
or 2000

Note Use the following dedicated Boards and Card.
Model

Contents

3G8F5-DRM21

Dedicated ISA Board and Configurator (Ver.2)
installation disk

3G8E2-DRM21

Dedicated PCMCIA Card and Configurator (Ver.2)
installation disk

Personal
computer
IBM PC/AT or
compatible

OS
Windows 95, 98 or NT4.0
Windows 95 or 98

The main functions of the Configurator are illustrated below. For further
details, refer to the DeviceNet Configurator Operation Manual (W382).

Section 1-5

Outline of the Configurator

Remote I/O master allocations (with creation of a scan list) and
remote I/O slave allocations

Setup functions

Enabling or disabling master or slave function of CS/CJ-series
DeviceNet Unit.
Setting master device parameters except scan list parameters
(i.e., connection settings, device data checks, and
communications cycle time)
Setting other manufacturers' slave and master device
parameters

Main functions of
Configurator

Displaying a device information list
Monitoring functions
Monitoring master status, Unit status, Master error logs, and
communications cycle data

Storage functions

Note

Saving offline device information prepared with master device
parameters or online network device information (Data is saved
as network configuration files.)

1. Master device parameters used in a scan list are created with either of the
following methods.
a) Using the Parameter Wizard
b) Setting all parameters
2. Connect only one Configurator to each Network.
3. Do not use the Configurator in a location with too much electromagnetic
noise, particularly when using a PCMCIA Card. If noise is too extreme, the
computer may run out-of-control, although there will be no negative effects
on the DeviceNet network even if noise causes the computer to run out-ofcontrol.
4. The only DeviceNet masters that can be handled by the Configurator are
OMRON’s CS1W-DRM21, CJ1W-DRM21, CVM1-DRM21-V1, and
C200HW-DRM21-V1.

1-5-2

Configurator Specifications
Item

Operating environment

Personal computer: IBM PC/AT or compatible
CPU: Pentium 166 MHz or higher (with Windows NT)
Memory: 32 Mbytes
Hard disk: A minimum of 15 Mbytes

Windows 95, 98, Me, NT4.0, or 2000

Network connection method

Dedicated
Board/Card

Specification

Hardware

Dedicated Board/Card

3G8F5-DRM21: Dedicated ISA Board
3G8E2-DRM21: Dedicated PCMCIA Card

Serial connection (to
DeviceNet network with
gateway)

• Peripheral or RS-232C port of PC with DeviceNet
Unit mounted.
• RS-232C port of Serial Communications Board/Unit.
Serial communications mode: Peripheral bus or Host
Link

Network status

A single node address is used.

Connectable
number of
Boards/Cards

One/network

Section 1-5

Outline of the Configurator
Item
Main functions

Setup functions

Specification
Master device parameter settings for OMRON’s Master
• Remote I/O master allocations (with a scan list)
The node address order can be set as desired. Two output blocks and two input
blocks can be allocated. (See note.)
• Remote I/O slave allocations
• Setting master remote I/O communications connections
• Setting slave remote I/O communications connections
• Enabling or disabling device data checks through remote I/O communications
(checks on slave vendor ID, device type, and product code data)
• Setting an explicit message monitor timer list
• Setting a COS/cyclic heart beat timer value
• Setting the communications cycle time
Note 1. A device Parameter Wizard is supported for the Master.
2. Using remote I/O master allocations eliminate restrictions on node
addresses. Furthermore, a number of masters can be mounted to the PC
with no allocation area duplication.
Setting parameters for other manufacturers’ slaves (EDS file required).
Setting node addresses and baud rates

Monitoring func- • Listing information on devices connected to the network (in node address order or
tions
remote I/O configuration order, for example)
• Monitoring Unit status data, Master function status data, and slave function status
data
• Monitoring Master error history
CVM1-DRM21-V1 or C200HW-DRM21-V1: Up to 20 records of time, error code,
and error condition data
CS1W-DRM21: Up to 64 records of time, error code, and error condition data
• Monitoring communication cycle time
Storage functions

Saving offline device information prepared with master device parameters or online
network device information. Such data is saved as network configuration files.

Other functions

•
•
•
•

Files that can be written

Reading/writing and preparing EDS files
Checking for duplicate I/O allocations in master parameters
Printing master/slave device parameters
Installing Expansion Modules to expand functions

• Master parameter files (parameters for OMRON Master: 1 file per node)
Note Slave communications are saved as well in the master device parameters file
with the DeviceNet Unit.
• Slave device parameter files (parameters for slaves: 1 file per node)
• Network file (all master/slave parameters for masters/slaves in the device list: 1 file/
network)
• EDS file (DeviceNet device definition file: 1 file/device type)

Section 1-6

Basic Operating Procedures

1-6
1-6-1

Basic Operating Procedures
Network Installation Procedure
Note For details on the network installation procedure, refer to the DeviceNet Operation Manual (W267). Only a general description is given here.
Determine a suitable baud rate for the
system.

(1)

(2)

Determine the node arrangement, the wiring configuration, and the cable lengths.
A) Restrictions on lengths of trunk lines and
branch lines and total drop line length. (Selection
of thick cables or thin cables)
B) Separation from noise sources.

Do (1) and (2) above meet the
DeviceNet specifications?

Check

Yes
(3)

Determine the method for providing a
communications power supply.

(4)

Arrange for the required devices.

Delivery of devices.

(5)

1-6-2

Installation

Hardware Preparations for Communications
1,2,3...

1. Set the initial settings for the DeviceNet Unit:
Unit No. (UNIT No.)
Node address (NODE ADR)
Baud rate (DIP switches 1 to 2)
Communications continue/stop setting for communications errors (DIP
switch pin 3)(with Master communications)
I/O hold/clear for communications errors (DIP switch pin 4)(with Slave
communications)
2. Set the initial settings for slaves:

Section 1-6

Basic Operating Procedures
Node address (Pins 1 to 6)
Baud rate (Pins 7 and 8)
Etc.
3. Mount the Master and wire the network.
Treat as a CPU Bus Unit.
Can mount to a CPU Rack or Expansion Rack.
With fixed allocations: 3 Units max.
With user-set allocations: 16 Units max.

4. Connect a Programming Device to the PC and turn ON the power supply
to the PC.
5. Generate the I/O tables.
Note

1. A slave may not go online if the communications power supply is turned
ON after the slave is turned ON.
2. The communications power supply and slave power supply, the slave power supply and PC power supply, or all three of these power supplies may
be turned ON simultaneously.

1-6-3

Creating Routing Tables
The DeviceNet Unit functions as a Communications Unit in the same way as a
SYSMAC LINK Unit, Controller Link Unit, and Ethernet Unit.
It is therefore necessary to create routing tables for the communications functions to be used, as shown in the table below.

Mounted Units

Using master or
slave functions only

Using explicit
message
communications
(not supported
across networks)

DeviceNet Unit is the
only Communications Unit mounted

Not necessary (See note 1.)

Multiple DeviceNet
Units mounted as
Communications
Units

Not necessary (See
note 1.)

DeviceNet Unit and
other Communications Unit mounted
simultaneously

Local network table necessary (See note 2.)

Note

Using FINS message
Using FINS
communications across
message
networks
communications
not across networks
Local network table (See
note 2.) and relay network
table are necessary.

Local network table necessary (See note 2.)

1. If a local network table already exists in the CPU unit being used, the DeviceNet Unit must be registered in that table.
2. The DeviceNet Unit must be registered in the local network table.
Refer to 6-3 Using FINS Message Communications for information on the
routing tables.
The routing tables are created using CX-Net inside the CX-Programmer.
Refer to the CX-Net Operation Manual (WS02-CXPC1-EV@) for details.

Note

1. A local network table is sometimes necessary even when the DeviceNet
Unit is not operating across networks.
2. If you prepare a local network table inside the CPU Unit, be sure to register
the DeviceNet Unit.
3. Even if a local network table exists inside the CPU Unit, the 7-segment display of the DeviceNet Unit may indicate “HC” and FINS message/explicit

Section 1-6

Basic Operating Procedures

message communications may not be possible unless the DeviceNet Unit
is registered in the local network table.

1-6-4

Procedures Prior to Starting Communications

Using the Master Function
To use the master function, the Master Enable Switch (word n, bit 06) must be
turned ON from a Programming Device. Enable master communications
through CS1W-DRM21 properties if you are using a Configurator.
Note

1. Make sure the scan list is enabled when using the master function. This
will allow you to check whether slaves are online or not from the CPU Unit
so that you will be able to determine whether or not the DeviceNet is communicating properly.
2. Remote I/O communications with a specified slave can be turned OFF
(disconnected) by turning ON (1) the corresponding Disconnect/Connect
Switch (words n+6 to n+9) when a slave is replaced or is registered in the
scan list prior to being connected. These switches are cleared when the
power supply is turned OFF, however, so a bit must be turned back ON (1)
from the ladder program when the power turns ON for it to be valid again.

Fixed Allocations
Use the following procedure to use fixed allocations. Refer to 4-3 Fixed Allocations for details on fixed allocations.
1,2,3...

1. Turn ON the communications, slave, and PC power supplies.
Note Turn ON the communications power supply before turning ON the
slave power supplies or the slaves may not go online.
2. Switch the CPU Unit to PROGRAM mode.
3. Check Unit Status 2 (word n+11, bit 03) from a Programming Device connected to the CPU Unit to see if the master function is ON (enabled). If it
is enabled, skip step 4 below and proceed to step 5.
4. If the master function is OFF (disabled), turn ON the Master Enable Switch
(word n, bit 06) from a Programming Device connected to the CPU Unit.
Note Execute this only when master communications are turned OFF. (If
the Master Enable Switch is turned ON when master communications are ON, a Unit error will occur and a C2 error will be displayed
on the 7-segment display on the front panel.)
5. Turn ON the Master Fixed Allocation Area Setting 1 to 3 Switches (word n,
bits 8 to 10). Master remote I/O communications will begin with the scan
list disabled.
6. Turn ON the Scan List Enable Switch (word n, bit 00). Master remote I/O
communications will begin with the scan list enabled.
7. Switch the CPU Unit to RUN mode.

User-set Allocations Using Allocated DM Area Words
Use the following procedure to set allocations using the words allocated to the
Unit in the DM Area. Refer to 4-4 User-set Allocations for details on user-set
allocations.
1,2,3...

Section 1-6

Basic Operating Procedures

3. Check Unit Status 2 (word n+11, bit 03) from a Programming Device connected to the CPU Unit to see if the master function is ON (enabled). If it
is enabled, skip step 4 below and proceed to step 5.
4. If the master function is OFF (disabled), turn ON the Master Enable Switch
(word n, bit 06) from a Programming Device connected to the CPU Unit.
Note Execute this only when master communications are turned OFF. (If
the Master Enable Switch is turned ON when master communications are enabled, a Unit error will occur and a C2 error will be displayed on the 7-segment display on the front panel.)
5. Input data in advance into the Master User Allocation Setup Table (words
m+1 to m+6) and the Allocation Size Setup Table (specify the position in
words m+5 and m+6)
6. Turn ON the Master User-set Allocation Switch (word n, bit 11). Master remote I/O communications will begin with the scan list enabled.
7. Switch the CPU Unit to RUN mode.
User-set Allocations Using the Configurator
Use the following procedure to set allocations using the Configurator. Refer to
DeviceNet Configurator Operation Manual for details on Configurator operating procedures
1,2,3...

1. Turn ON the communications, slave, and PC power supplies.
Note Turn ON the communications power supply before turning ON the
slave power supplies or the slaves may not go online.
2. Switch the CPU Unit to PROGRAM mode.
3. Create a network configuration file and device parameters file from the
Configurator. (Enable master communications in CS1W-DRM21 properties at this time.)
4. Download the above files to the devices on the network. Remote I/O communications will begin with the scan list enabled.
5. Switch the CPU Unit to RUN mode.

Using Slave Function
To use the slave function, the Slave Enable Switch (word n+1, bit 06) must be
turned ON from a Programming Device. Enable slave communications
through CS1W-DRM21/CJ1W-DRM21 properties if you are using a Configurator.
With fixed allocations or allocations set in the allocated DM Area words, slave
communications must be disabled prior to area allocation and must be
enabled following area allocation. The order of the procedure is thus Slave
Stop Switch (if slave communications are enabled), area allocation, and Slave
Enable Switch.
Note Slave communications must be disabled prior to area allocation when using
fixed allocations or allocations set in the allocated DM Area words, and the
settings must be read to the Unit when slave communications are enabled.
Allocations will not be valid if slave communications are enabled during area
allocation.
Fixed Allocations
Use the following procedure to use fixed allocations. Refer to 5-2 Fixed Allocations for details on fixed allocations.
1,2,3...

1. Switch the CPU Unit to PROGRAM mode.

Section 1-6

Basic Operating Procedures

2. Check Unit Status 2 (word n+11, bit 07) from a Programming Device connected to the CPU Unit to see if the slave function is OFF (disabled). If it is
disabled, skip step 3 below and proceed to step 4.
3. If slave communications are enabled, turn ON the Slave Stop Switch (word
n+1, bit 07).
4. Turn ON the Slave Fixed Allocation Area Settings 1 to 3 Switches (word
n+1, bits 8 to 10).
5. Turn ON the Slave Enable Switch (word n+1, bit 06) from a Programming
Device connected to the CPU Unit.
Note Execute this only when slave communications are turned OFF. (If the
Slave Enable Switch is turned ON when slave communications are
enabled, a Unit error will occur and a C2 error will be displayed on
the 7-segment display on the front panel.)
6. Switch the CPU Unit to RUN mode. Slave remote I/O communications will
begin.
User-set Allocations Using Allocated DM Area Words
Use the following procedure to set allocations using the words allocated to the
Unit in the DM Area. Refer to 5-3 User-set Allocations for details on user-set
allocations.
1,2,3...

1. Switch the CPU UNit to PROGRAM mode.
2. Check Unit Status 2 (word n+11, bit 07) from a Programming Device connected to the CPU Unit to see if the slave function is OFF (disabled). If it is
disabled, skip step 3 below and proceed to step 4.
3. If Slave is enabled, turn ON the Slave Stop Switch (word n+1, bit 07).
4. Input data in advance into the Slave User Allocation Setup Table (words
m+8 to m+13).
5. Turn ON the user Slave User-set Allocation Switch (word n+1, bit 11).
6. Turn ON the Slave Enable Switch (word n+1, bit 06) from a Programming
Device connected to the CPU Unit.
Note Execute this only when slave communications are turned OFF. (If the
Slave Enable Switch is turned ON when slave communications are
enabled, a Unit error will occur and a C2 error will be displayed on
the 7-segment display on the front panel.)
7. Switch the CPU Unit to RUN mode. Slave remote I/O communications will
begin.

User-set Allocations Using the Configurator
Use the following procedure to set allocations using the Configurator. Refer to
DeviceNet Configurator Operation Manual for details on Configurator operating procedures
1,2,3...

1. Switch the CPU Unit to PROGRAM mode.
2. Create a device parameter file from the Configurator. (Enable Slave communications in CS1W-DRM21 properties at this time.) Then download the
file to the DeviceNet Unit.
3. Turn ON the Slave Enable Switch (word n+1, bit 06) from a Programming
Device connected to the CPU Unit.
Note Execute this only when slave communications are turned OFF. (If the
Slave Enable Switch is turned ON when slave communications are
enabled, a Unit error will occur and a C2 error will be displayed on
the 7-segment display on the front panel.)

Section 1-6

Basic Operating Procedures

4. Switch the CPU Unit to RUN mode. Slave remote I/O communications will
begin.

Message Communications Only (Neither Master nor Slave Function Used)
The DeviceNet Unit does not have to be registered in the scan list if it is only
used for message communications. Message communications (send and
receive) can be executed with both master and slave communications disabled.

Section 1-7

List of Usage Methods by Purpose

1-7

List of Usage Methods by Purpose
Situation

Design

Allocating any
words for
remote I/O

Action
108
In order of node Set using the allocated DM Area words.
addresses
(Master User Allocations Setup Table and Allocation Size Setup Table)
Note Allocations using allocated DM Area words:
Order of node addresses and two blocks,
OUT 1 and IN 1.
Not in order of
node
addresses

Page

Set using the configurator.
113
Note Allocations using Configurator: Any node
address order and four blocks, OUT 1, IN 1,
OUT 2 and IN 2. Allocation is much easier
using a wizard.

Using the Unit as a slave

Set using the allocated DM Area words.

122

Performing message communications between PCs to which
DeviceNet Units are mounted

Execute communications instructions from the user 134
program.

Mounting multiple DeviceNet
Units using master communications to a single PC

3 Units max. with fixed allocations
16 Units max. with user-set allocations

Mounting multiple DeviceNet
Units using slave communications to a single PC

3 Units max. with fixed allocations
16 Units max. with user-set allocations

122

Connecting multiple PCs (master Supported by user-set allocations using allocated
communications) in a network
DM Area words or user-set allocations using the
Configurator.

122

Connecting a single Master PC
and multiple Slave PCs in a network

Set multiple PCs to Slave mode from the allocated
DM Area words or the Configurator.
Note Up to 64 Units may be on a network.
(Example: 1 Master PC and 63 Slave PCs)

122

Sending DeviceNet explicit messages

Set the FINS command code to 2801.

138

Setting the node address for a
DeviceNet Unit

Set the rotary switches on the front of the
DeviceNet Unit.

Setting the baud rate for the
DeviceNet Unit

Set the DIP switch on the front of the DeviceNet
Unit.

Stopping remote I/O communica- Set the DIP switch on the front of the DeviceNet
tions for communications errors
Unit.

Holding OUT data in slave I/O
memory for communications
errors

Set the DIP switch on the front of the DeviceNet
Unit.

Section 1-7

List of Usage Methods by Purpose
Situation
Operation

Action

Page

Stopping remote I/O communica- Stop communications using the Configurator or the 62
tions with all Slaves
Remote I/O Communications Stop Switch in the
allocated CIO Area words.
Using a scan list in remote I/O
communications (fixed allocations)

Turn ON the Scan List Enable Switch in the allocated CIO Area words.

Enabling a scan list in remote I/O
communications (user-set allocations by allocated DM Area
words)

Set the allocation areas using the allocated DM
Area words, and turn ON the user-set allocations
user setting switch for the allocated CIO Area
words.

Changing the communications
system configuration

100
Turn ON the Scan List Clear Switch for the allocated CIO Area words, and turn the Scan List
Enable Switch back ON after you change the communications system.

Monitor the Master Status 2 status codes in the
Checking master I/O allocation
status (fixed allocations, user-set allocated CIO Area words from a Programming
allocations by allocated DM Area Device.
words, user-set allocations by the
Configurator)

Checking to see if all slaves are
registered in the scan list

Check the Registered Slave Table in the allocated
CIO Area words.

Checking to see if all slaves are
performing remote I/O communications properly

Check the Normal Slave Table in the allocated CIO 79
Area words.

Checking to see if there is an
error history in the DeviceNet
Unit

Check the error history (registration yes/no) in the
allocated CIO Area words from a Programming
Device.

Monitoring the error history in the Execute the device monitor function from the ConDeviceNet Unit
figurator (Error History Tab).

DeviceNet Configurator Operation Manual

Monitoring status of the
DeviceNet Unit

Execute the device monitor function from the Configurator (Status and Unit Status Tabs).

Checking the current communications cycle time

Execute the device monitor function from the Configurator (Current Communications Cycle Time
Tab).

Adjusting the communications
cycle time

Execute the device parameter edit function from
the Configurator (Communications Cycle Time
Tab).

Saving all parameters, like scan
list data, for masters and slaves
on the network

Save the network configuration from the Configurator.

Replacing a DeviceNet Unit

1. Insert a Memory Card in the CPU Unit and turn 226, 247
ON the Unit Setup File Backup Switch in the
allocated CIO Area words.
2. Replace the DeviceNet Unit.
3. Turn ON the Unit Setup File List Switch in the
allocated CIO Area words.
4. Turn ON Scan List Clear Switch in the allocated
CIO Area words.
5. Make sure the slave is connected, and then turn
ON the Scan List Enable Switch.

SECTION 2
Nomenclature and Installation
This section describes the nomenclature and installation of the DeviceNet Unit.
2-1

2-2

Nomenclature and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-1

Nomenclature and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-2

Status Indicators: MS and NS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-3

Seven-Segment Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1-4

Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the DeviceNet Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-1

System Configuration Precautions . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-2

Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-3

Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-4

External Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 2-1

Nomenclature and Functions

2-1
2-1-1

Nomenclature and Functions
Nomenclature and Functions

CS1W-DRM21
DRM21

Indicators

6543

DCB

UNIT
No. 210FE

A987

65 4

10 9

X101

NODE
ADR 1 0 9

Unit No. switch
This switch sets the unit number of the DeviceNet Unit
as a one-digit hexadecimal value.

X100

65 4

1 2 3 4

DR0

DR1

ESTP

HOLD

Communications connector
Connect the Network communications cable to this
connector. The communications power is also
supplied through this connector.
A parallel connector with screws (XW4B-05C1-H1-D)
is provided for node connection.

CJ1W-DRM21
DRM21

789

x101

NODE
ADR
x100

789

HOLD
ESTP
DR1
DR0

1 2 3 4
ON

ON
4
3
2
1

Indicators
Unit No. switch
This switch sets the unit number of the DeviceNet Unit as a onedigit hexadecimal value.

456

MS
NS

Node address switches
These switches set the node address as a two-digit decimal value.
DIP switch
The pins have the following functions:
Pins 1 and 2: Baud rate
Pin 3: Continue/Stop communications for error (when used as a
Master)
Pin 4: Hold/clear I/O for communications error (when used as a
Slave)
Communications connector
Connect the Network communications cable to this connector. The
communications power is also supplied through this connector.
A parallel connector with screws (XW4B-O5C1-H1-D) is provided
for node connection.

Indicators
The DeviceNet Units are equipped with the following indicators that indicate
the operating status of the node itself and the overall network.
1,2,3...

1. Two status indicators (two-color: Green or red LEDs)
2. A two-digit, 7-segment display
3. Two dot indicators

Section 2-1

Nomenclature and Functions

2. Two-digit, 7-segment display
MS

1. Status indicators
NS

3. Dot indicators

2-1-2

Status Indicators: MS and NS
The MS (Module Status) indicator indicates the status of the node itself and
the NS (Network Status) indicator indicates the status of the network.
The MS and NS indicators can be green or red and they can be OFF, ON, or
flashing (alternating 0.5-s ON and 0.5-s OFF.) The following table shows the
meaning of these indicator conditions.
Indicator
MS

Color

Status

Meaning (likely errors)

Green

Normal operating status
Communications are being performed normally.

Red

A non-recoverable, fatal error has occurred.
(Watchdog timer error, memory error, or system error.)
Replace the DeviceNet Unit.

Flashing A recoverable, non-fatal error has occurred. (Structure
error, switch setting error, PC initialization error, PC interface error, or routing table error.)
Correct the error and reset the Unit.
NS

---

OFF

Power isn’t being supplied or the Unit is being reset.

Green

The Unit is online with the network and remote I/O communications have been established with a slave registered in the scan list or message communications have
been established.

Flashing The Unit is online with the network, but neither remote I/
O communications nor message communications have
been established. Either the scan list is being read, or
both remote I/O communications and message communications are disabled.
Red

A fatal communications error has occurred. Network
communications are not possible.
(Node address duplicated or Bus Off error)

Flashing A non-fatal communications error has occurred. (Communications error, setup error, or verification error)
---

OFF

The Unit is not online with the network.
(There is no network power supply, the Unit is being
reset, a minor failure, or a sending error has occurred.)

Section 2-1

Nomenclature and Functions

2-1-3

Seven-Segment Display
In addition to the MS and NS indicators, DeviceNet Units have a 2-digit, 7segment display that normally indicates the master node address. When an
error occurs, the display will alternate between the error code and the node
address of the faulty slave.
There are dot indicators at the lower-right corner of each digit. The left dot
indicator shows whether or not the master is operating and whether the scan
list is enabled or disabled. The right dot indicator shows whether or not the
slave is operating.
Normal: Master's node address
Error:
Error code and faulty node address

Indicates whether the slave is operating or stopped.
Indicates whether the master is operating or stopped and
whether the scan list is enabled or disabled.

Seven-segment Digits
The following table shows the functions of the 7-segment digits.
Status
Remote I/O communications active and
normal
From power ON to completion of node
address check (master function disabled,
slave function disabled, or both disabled)

Lit
Flashing

Remote I/O communications started

Flashing (until communications actually start)

From completion of the node address
check until the start of remote I/O communications

Flashing

Error

Scan list

Watchdog timer

Not lit

Memory error or
system error

Error code only

Other errors

Alternately displays the error code and
error node address (see diagram below)

Reading

“- -”

Registered

Display
Displays the master’s node address
(00 to 63)

Lit

Flashing

Section 2-1

Nomenclature and Functions

The following diagram shows the alternating error code/ node address display.
OFF (0.1 s)

OFF (0.3 s)
Faulty slave's
node address
(1 s)

Error code
(1 s)

OFF (0.1 s)
Error code
(1 s)

OFF (0.3 s)
Faulty slave's
node address
(1 s)

OFF (0.1 s)

OFF (0.3 s)

Master's node
address (1 s)

OFF (0.3 s)

Master's
error code (1 s)

If there is an error at the DeviceNet Unit.

The master’s error code and master’s node address will be displayed if an
error has occurred at the master.
There is no priority in the error codes; all errors that have occurred will be displayed in order. All error codes begin with letters, so they can be distinguished
from node addresses immediately.
Dot Indicators
The following table shows the functions of the dot indicators.
Indicator

2-1-4

Display

Left dot

Scan list enabled/
disabled, master
function disabled

ON: Master function disabled
Flashing: Scan list disabled mode
OFF: Scan list enabled mode

Right dot

Slave function dis- ON: Slave function disabled
abled
OFF: Slave operating

Switch Settings

Unit No. Switch

Use this switch to set the unit number of the DeviceNet Unit as a CPU Bus
Unit. The unit number setting determines the CIO and DM area words allocated to the Unit as software switches and the status area.

CS1W-DRM21 CJ1W-DRM21
01
EF 2

DCB

789A

3456

210FE

BCD

6543

Content

Setting method: One-digit hexadecimal

A987

Setting range:
Note

0 to F

1. The unit number is set to 0 at the factory.
2. Any unit number from 0 to F can be set as long as it hasn’t been set on
another CPU Bus Unit connected to the same PC.
3. Use a small flat-blade screwdriver to turn the rotary switches; be careful
not to damage the switch.
4. Always turn OFF the PC before changing the unit number setting.
5. If the unit number is the same as one set on another CPU Bus Unit connected to the same PC, a duplicate number error will occur in the PC and
it won’t be possible to start up the DeviceNet network.

Node Address Switches

Use these switches to set the node address of the Unit.

CS1W-DRM21 CJ1W-DRM21
9 01

9 01

Setting method: Two-digit decimal

X101

X100

456

65 4

10 9

456

X101

109

X100

Setting range:

0 to 63

65 4

Section 2-1

Nomenclature and Functions
Note

1. The node address is set to 63 at the factory.
2. Any node address from 0 through 63 can be set as long as it hasn’t been
set on another slave node.
3. If the node address is the same as one set on another node, a node address duplication error will occur and it won’t be possible to start up network communications.
4. Node address 0 cannot be used for FINS message communication. Use a
node address other than 0 for FINS message communication.

DIP Switch

The DIP switch on the front of the DeviceNet Unit is used to set the baud rate,
whether communications will be continued or stopped when a communications error occurs, and whether to hold or clear the remote outputs when a
communications error occurs in the slave function.
CS1W-DRM21
1 2 3 4

Baud rate
Continue/stop communications for communications error (when used as a master)
Hold/clear I/O for communications error (when used as a slave)

CJ1W-DRM21
1 2 3 4
ON

Hold/clear I/O for communications error (when used as a slave)
Continue/stop communications for communications error (when used as a master)
Baud rate

The settings of the DIP switch pins are shown in the following table. All pins
are set to OFF at the factory.
Pin
1

Function
Baud rate

Setting
See the next table.

2
3

Continue/stop remote I/O communica- OFF:
tions for communication errors (when ON:
used as a master)

Continue communications
Stop communications

Hold/clear remote outputs for commu- OFF:
nications error (when used as a slave) ON:

Clear remote outputs
Hold remote outputs

Baud Rate
Pins 1 and 2 are used to set the baud rate as shown in the following table.

Note

Pin 1

Pin 2

OFF

125 kbps

Baud rate

OFF

250 kbps

OFF

500 kbps

Not allowed.

1. Always turn OFF the PC before changing the DIP switch settings.
2. Set the same baud rate on all of the nodes (Master and Slaves) in the Network. Any slaves with baud rates different from the master’s rate won’t be
able to participate in communications and may cause a communications
error between nodes that have been set properly.

Section 2-2

Installing the DeviceNet Unit
Continue/Stop Remote I/O Communications

When the DeviceNet Unit is used as a master, pin 3 is used to set whether or
not communications will stop after a communications error.
Pin 3

Function

OFF

Continue communications.

Stop communications.

If pin 3 is ON, remote I/O communications will be stopped if one of the following errors occurs.
Remote I/O Communications Error Flag (n+12, bit 02 is ON)
Send Timeout Flag (n+10, bit 08 is ON)
Network Power Error Flag (n+10, bit 07 is ON)
Remote I/O communications will remain stopped even if the error is cleared.
(Message communications and slave functions will continue.) To resume communications, turn ON the Remote I/O Communications Start Bit (word n, bit
02) of Software Switches 1. Refer to 3-2 Allocated CIO Area Words for details.
Note The 7-segment display will show “A0” when remote I/O communications stop.
Refer to SECTION 9 Troubleshooting and Maintenance.
If pin 3 is OFF, remote I/O communications will stop if a send timeout or network power error occurs, but will restart automatically when the cause of the
error is cleared.
Hold/Clear Remote Outputs
When the DeviceNet Unit is used as a slave, pin 4 is used to set whether to
hold or clear remote outputs when a communications error occurs.
Note If the DeviceNet Unit is used as a slave, the 7-segment display will show “L9”
when remote I/O communications stop. Refer to SECTION 9 Troubleshooting
and Maintenance.
Communications
Connectors

Color stickers that match communications cable colors are attached to the
communications connectors. Match the colors when connecting communications cables to the connectors. These colors are given in the following table
Color

Signal

Black

Power line, negative voltage (V–)

Blue

Communications line, low (CAN L)

---

Shield

White

Communications line, high (CAN H)

Red

Power line, positive voltage (V+)

For details on communications specifications and wiring, refer to DeviceNet
(CompoBus/D) Operation Manual (W267).
Note Before connecting communications cables, turn OFF the PC power supply, all
slave power supplies, and the communications power supply.

2-2
2-2-1

Installing the DeviceNet Unit
System Configuration Precautions
• I/O words are allocated to CPU Bus Units according to the unit number
setting on the switch located on the front panel of the Unit, not according
to Unit slot numbers. Refer to 3-1 Overview of Word Allocations.

Section 2-2

Installing the DeviceNet Unit

• In the CS-series, up to 16 Units can be mounted to the CS1W-BC
CPU Backplane or CS1W-BI
3 Expansion CPU Backplane.

@@3

• In the CJ-series, up to 16 Units can be mounted to the CPU Unit or
Expansion Unit (but no more than 10 Units on either).

2-2-2

Mounting
CS-series
Mount the DeviceNet Unit to the Backplane using the following procedure.
1,2,3...

1. Hook the claw on the bottom of the Unit onto the Backplane.
Claw

Backplane

2. Insert the Unit into Backplane connectors and securely tighten the screw
at the bottom of the Unit. Tighten the screws to a torque of 0.4 N•m.
3. When removing the Unit, first loosen the screw at the bottom of the Unit.

Fixing screws

Section 2-2

Installing the DeviceNet Unit

Note When mounting the Unit, provide the clearance shown below to facilitate easy
mounting or dismounting.

Duct
20 mm min.
Backplane

20 mm min.
Duct

Philips screwdriver

CJ-series
1. Carefully align the connectors to mount the DeviceNet Unit.
Connectors
PA205R
POWER

RUN

DRM21

INH
PRPHL

PROGRAMMABLE
CONTROLLER

MS
NS

COMM

OPEN

AC100-240V
L2/N
4

PERIPHERAL

RUN
OUTPUT
AC240V
DC24V

PORT

2. Move the yellow sliders on the top and bottom of the Unit until they click
into position, to lock.
Slider

PA205R
POWER

RUN

Lock

DRM21

INH
PRPHL

PROGRAMMABLE
CONTROLLER

COMM

Release

OPEN

BUSY

AC100-240V
L2/N

ON
4

PERIPHERAL

RUN
OUTPUT
DC24V

PORT

Note If the sliders are not securely locked, the DeviceNet Unit functions may not
operate sufficiently.
To dismount the Unit, move the sliders to the “Release” direction.

2-2-3

Handling Precautions
• Always turn OFF the power supply to the PC before mounting or dismounting a Unit or connecting or disconnecting cables.

Section 2-2

Installing the DeviceNet Unit

• Provide separate conduits or ducts for the I/O lines to prevent noise from
high-tension lines or power lines.
• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction if foreign matter enters the Unit.
• Remove the label after the completion of wiring to ensure proper heat dissipation. Leaving the label attached may result in malfunction.
CS1W-DRM21
Remove the label after wiring.

CJ1W-DRM21
Remove the label after wiring.

4
3
2
1

HOLD
ESTP
DR1
DR0

1 2 3 4
ON

Section 2-2

Installing the DeviceNet Unit

External Dimensions
CS1W-DRM21
13.7

35
DRM21

101

MS
NS

6543

EDCB

UNIT
No. 210F

A987

X101

65 4

1 2 3 4

130

109

NODE
ADR 1 0 9

X100

65 4

DR0

DR1

ESTP

HOLD

7
12

These diagrams show the dimensions of the DeviceNet Unit. Refer to the CS1
Series CPU Unit Operation Manual (W339) or the CJ Series CPU Unit Operation Manual (W393) for the dimensions of the Unit when it is mounted to the
Backplane. (All dimensions are in mm.)
CJ1W-DRM21
13.7

MS
NS
UNIT
NO.

4
3
2
1

HOLD
ESTP
DR1
DR0

1 2 3 4
ON

2-2-4

5
11

SECTION 3
Allocated CIO and DM Words
This section describes the words allocated to the DeviceNet Unit in the CIO Area and DM Area. These words both enable
controlling the DeviceNet Unit and accessing Unit and network status.
3-1

3-2

3-3

Overview of Word Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-1

Allocated CIO Area Words. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-2

Allocated DM Area Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Allocated CIO Area Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-1

Software Switches 1 (Word n) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-2

Software Switches 2 (Word n+1) . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-3

Master COS Send Switches (Words n+2 to n+5) . . . . . . . . . . . . . . .

3-2-4

Disconnect/Connect Switches (Words n+6 to n+9) . . . . . . . . . . . . .

3-2-5

Unit Status 1 (Word n+10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-6

Unit Status 2 (Word n+11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-7

Master Status 1 (Word n+12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-8

Master Status 2 (Word n+13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-9

Slave Status 1 (Word n+14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-10 Slave Status 2 (Word n+15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-11 Registered Slave Table (Words n+16 to n+19) . . . . . . . . . . . . . . . . .

3-2-12 Normal Slave Table (Words n+20 to n+23) . . . . . . . . . . . . . . . . . . .

3-2-13 C200H Master Replacement Master Status 1 (Word n+24) . . . . . . .

Allocated DM Area Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3-1

Communications Cycle Time Setup Table . . . . . . . . . . . . . . . . . . . .

3-3-2

Master User Allocations Setup Table . . . . . . . . . . . . . . . . . . . . . . . .

3-3-3

Allocation Size Setup Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3-4

Slave User Allocations Setup Table . . . . . . . . . . . . . . . . . . . . . . . . .

3-3-5

Communications Cycle Time Reference Table . . . . . . . . . . . . . . . .

3-3-6

Master User-set Allocations Reference Table . . . . . . . . . . . . . . . . .

3-3-7

Slave User-set Allocations Reference Table . . . . . . . . . . . . . . . . . . .

3-3-8

Slave Detailed Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 3-1

Overview of Word Allocations

3-1

Overview of Word Allocations
The words shown in the following diagram are allocated according to the unit
number setting. For each Unit, there are 25 words allocated in the CIO Area
and 100 words allocated in the DM Area.
First word allocated in the CIO Area: n = CIO 1,500 + (25 x unit number)
First word allocated in the DM Area: m = D30,000 + (100 x unit number)
DeviceNet Unit

CPU Unit

Unit number: 0
Local memory

CPU Bus Unit
CIO Area
CIO 1500
CIO 1501

Software switches
25 wds

Unit #0

25 wds

(I/O refresh) status

CIO 1524
CIO 1525
CIO 1526
25 wds

Unit #1
CIO 1549

CIO 1875
Unit #15

25 wds
CIO 1899

D30000
D30001
Unit #0

CPU Bus Unit
Allocated DM Area words

Local memory
setup tables

100 wds

(I/O refresh) status

100 wds

D30099
D30100
D30101
Unit #1

100 wds
D30199

D31500
Unit #15

100 wds
D31599

Note The CPU Bus Unit Setup words are not used with a CS/CJ-series DeviceNet
Unit.

Section 3-1

Overview of Word Allocations

3-1-1

Allocated CIO Area Words
Software switches, DeviceNet Unit status, and error data are allocated in the
CIO Area according to the unit number, as shown below. Software switches
are bits used as commands from the CPU Unit to the DeviceNet Unit to
enable executing Unit functions.
Unit number

3-1-2

Allocated words

Unit number

Allocated words

CIO 1500 to CIO 1524

CIO 1700 to CIO 1724

CIO 1525 to CIO 1549

CIO 1725 to CIO 1749

CIO 1550 to CIO 1574

CIO 1750 to CIO 1774

CIO 1575 to CIO 1599

CIO 1775 to CIO 1799

CIO 1600 to CIO 1624

CIO 1800 to CIO 1824

CIO 1625 to CIO 1649

CIO 1825 to CIO 1849

CIO 1650 to CIO 1674

CIO 1850 to CIO 1874

CIO 1675 to CIO 1699

CIO 1875 to CIO 1899

Allocated DM Area Words
The User Allocations Setup Tables and individual slave status by node
address are allocated in the DM area.
Unit number

Allocated words

Unit number

Allocated words

D30000 to D30099

D30800 to D30899

D30100 to D30199

D30900 to D30999

D30200 to D30299

D31000 to D31099

D30300 to D30399

D31100 to D31199

D30400 to D30499

D31200 to D31299

D30500 to D30599

D31300 to D31399

D30600 to D30699

D31400 to D31499

D30700 to D30799

D31500 to D31599

Section 3-2

Allocated CIO Area Words

3-2

Allocated CIO Area Words
Data is stored at the offset positions shown in the figure below starting from
the first word allocated to the Unit in the CIO Area.
The first word can be calculated as follows from the unit number setting:
First word n = CIO 1,500 + (25 x unit number)
Word

Bit 15

Bit 00

Software Switches 1

n+1

Software Switches 2
I/O
CPU Unit ↔ DeviceNet Unit

n+2
n+3
n+4

Direction

Master COS Send Switches (4 words)

n+5
n+6
n+7
n+8

Disconnect/Connect Switches (4 words)

Outputs
CPU Unit → DeviceNet Unit

n+9
n+10

Unit Status 1

n+11

Unit Status 2

n+12

Master Status 1

n+13

Master Status 2

n+14

Slave Status 1

n+15

Slave Status 1

n+16
n+17
n+18

Registered Slave Table (4 words)

Inputs
CPU Unit ← DeviceNet Unit

n+19
n+20
n+21
n+22

Normal Slave Table (4 words)

n+23
n+24

3-2-1

C200H Master Replacement Status (1)

Software Switches 1 (Word n)
All switches execute some function when the user turns them ON. They turn
OFF automatically after the function has been executed. Once a function is
set by turning a switch ON (except for the switches listed below), it is saved
regardless of whether the power is turned OFF and ON again.
• Remote I/O Communications Start Switch (bit 02, 03)
• Remote I/O Communications Stop Switch (bit 04)
Note No functions other than master and slave communications are disabled by
stopping master or slave communications.
If multiple bits are turned ON simultaneously, the requests will generate errors
but they will not alter Unit operation. The corresponding error bits in the following words will turn ON if a request made by a software switch ends in an error.

Section 3-2

Allocated CIO Area Words
• Unit status area 2 (word n+11)
• Master Status 1 (word n+12)
Word n [n = CIO 1,500 + (25 x unit number)]
Bit

Name

Status

Scan List
Enable
Switch

OFF→
ON

User

OFF

Unit

OFF→
ON

User

OFF

Unit

Scan List
Clear
Switch

Controlled
by

Unit operation

Operation conditions
CPU Mas- Scan
list
ter
Unit
oper- func- status
ating tion
mode
ProEnDisgram abled abled
mode

Enables the scan list with fixed allocations.
Note The allocated words are the ones set for use
when with the scan list is disabled.
The following allocated words are the default settings
when the scan list is disabled.
• OUT area: CIO 3200 to CIO 3263 (1 word/1 node address)
• IN area: CIO 3300 to CIO 3363 (1 word/1 node address)
Returns to OFF when the scan list is registered and the
Unit starts operating with the scan list enabled.
EnEnProClears and disables the scan list.
gram abled abled
This switch clears the scan list and operates the Unit
mode
using fixed allocations with the scan list disabled
regardless of the previous operation settings. The fixed
allocations used the last time the scan list was disabled
will be used.
Returns to OFF when the scan list data is cleared and
the Unit starts operating with the scan list disabled.

Default
setting

Scan
list disabled

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Remote I/ OFF→
ON
O Communications Start
Switch

OFF

Remote I/O OFF→
Communi- ON
cations
OFF
Start
Switch

Remote I/ OFF→
ON
O Communications Stop
Switch

OFF
05

Reserved --by system

Controlled
by

User

Unit

User
Unit
User

Unit
---

Unit operation

Operation condi- Default
tions
setting
CPU Mas- Scan
list
ter
Unit
oper- func- status
ating tion
mode
--En--None
abled

Starts remote I/O communications.
Note 1. The switch is ignored if remote I/O communications are already running.
2. This switch is used to restart remote I/O
communications if they are stopped by a
communications error.
3. Communications with a slave will fail even if
remote I/O communications are started if
the Disconnect/Connect Switch (corresponding bit in words n+6 to 9) is ON (1:
Connect).
Returns to OFF at the start of remote I/O communications.
Note This switch will stop remote I/O communications
if DIP switch pin 3 on the front panel (remote I/O
communications start/stop with a communications error) is ON (stop) and there is an ongoing
communications or send error.
--This switch functions the same as bit 02 above.
Note This switch is used to ensure compatibility
between the software switches and C200H
DeviceNet Master (C200HW-DRM21-V1).
--Stops remote I/O communications.
Once remote I/O communications have been stopped,
they will remain stopped until the Unit has been
restarted or the remote I/O communications have been
restarted (i.e., until the Remote I/O Communications
Start Switch is turned ON).
Note 1. The switch is ignored if remote I/O communications are already stopped.
2. Message communications will remain
enabled even if remote I/O communications
have stopped.
Returns to OFF when remote I/O communications
stop.
-----

--Enabled

En--abled

---

Section 3-2

Allocated CIO Area Words
Bit

Name

Master
Enable
Switch

Master
Stop
Switch

Master
Fixed
Allocation Setting 1
Switch

Master
Fixed
Allocation
Setting 2
Switch

Master
Fixed
Allocation Setting 3
Switch

Status

OFF→
ON

Controlled
by

User

OFF
OFF→
ON

Unit
User

OFF
OFF→
ON

Unit
User

OFF
OFF→
ON

Unit
User

OFF
OFF→
ON

Unit
User

OFF

Unit

Unit operation

Enables master communications. (The Unit automatically restarts.)
Once enabled, the Unit will function as a Master
regardless of whether the power is turned OFF and
back ON again until the Master Stop Switch (word n, bit
07) is turned ON.
Note 1. Master communications are enabled in the
default settings.
2. If this bit is turned ON with master communications enabled, a Unit status error will occur
and a C2 error will be displayed on the 7segment display. The 7-segment display will
go out automatically after 30 seconds.
Returns to OFF at the start of master communications.
Stops master communications. (The Unit automatically
restarts.)
Turn this switch ON if the Unit will be used only for
slave communications.
Returns to OFF after master communications stop.
Allocates the following words for use when the scan list
is disabled (default setting). (The Unit automatically
restarts.)
• OUT area: CIO 3200 to CIO 3263 (1 word/1 node address)
• IN area: CIO 3300 to CIO 3363 (1 word/1 node address)
Note The I/O words used with the scan list disabled
are also used with the scan list enabled. (Use
the Scan List Enable Switch (word n, bit 00).)
Returns to OFF after the fixed allocation areas are set.
Functions the same as bit 08 to allocate the following
words. (The Unit automatically restarts.)
• OUT area: CIO 3400 to CIO 3463 (1 word/1 node address)
• IN area: CIO 3500 to CIO 3563 (1 word/1 node address)
Returns to OFF after the fixed allocation areas are set.
Functions the same as bit 08 to allocate the following
words. (The Unit automatically restarts.)
• OUT area: CIO 3600 to CIO 3663 (1 word/1 node address)
• IN area: CIO 3700 to CIO 3763 (1 word/1 node address)
Returns to OFF after the fixed allocation areas are set.

Operation condi- Default
tions
setting
CPU Mas- Scan
list
ter
Unit
oper- func- status
ating tion
mode
ProDis- --Master
gram abled
enabled
mode

EnProgram abled
mode

---

EnDisMaster
Program abled abled Fixed
Allocamode
tion
Setting
1
enabled

ProEnDisgram abled abled
mode

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Master
User-set
Allocations
Switch

OFF→
ON

User

OFF

Unit

OFF→
Temporary Set- ON
ting
Switch for
Communications
Cycle
Time

OFF

Commu- OFF→
nications ON
Cycle
Time Setting
Switch
OFF

Controlled
by

User

Unit

User

Unit

Unit operation

Operation conditions
CPU Mas- Scan
list
ter
Unit
oper- func- status
ating tion
mode
En--ProReads setup data from the Master User Allocations
gram abled
Setup Table (words m+1 to m+7) in the DM Area and
registers the scan list. (The Unit automatically restarts.) mode
Once registered, the Unit will operate with master userset allocations regardless of whether the power is
turned OFF and back ON again until the scan list is
cleared.
Returns to OFF when the scan list is registered and the
Unit starts operating with the scan list enabled.
Note If there is a setting error, an error code will be
stored in the Master User Allocations Setup
Table (words m+1 to m+7) and the Scan List
Register/Clear Failed Flag (word n+12, bit 11)
will turn ON.
------Reads setup data from the Communications Cycle
Time Setup Table (word m) in the DM Area and temporarily changes the cycle time. The settings are not
stored in non-volatile memory in the Unit and will not
be valid again if the power is turned OFF and back ON
or if the Unit is restarted.
Use this to temporarily extend the communications
cycle time with a ladder program to place priority on
message communication.
Note The cycle time can be changed in any CPU Unit
operating mode.
Returns to OFF after the communications cycle time is
changed.
The Communications Cycle Time Reference Table
(words m+15 to m+18) will be cleared before the switch
returns to OFF if the change was successfully completed.
Note The Communications Cycle Time Setting Failed
Flag (word n+12, bit 12) turns ON if there is a
setting error, and the Communications Cycle
Time Reference Table (words m+15 to m +18)
will not be cleared.
----Reads setup data from the communications cycle time Program
setup table (word m) in the DM area to change the
communications cycle time, and to store the communi- mode
cations cycle time in non-volatile memory in the Unit.
The settings will therefore be valid again if the power is
turned OFF and back ON or if the Unit is restarted.
Returns to OFF after the communications cycle time is
changed.
The Communications Cycle Time Reference Table
(words m+15 to m+18) will clear before the switch
returns to OFF if the change was successfully completed.
Note The Communications Cycle Time Setting Failed
Flag (word n+12 bit 12) will turn ON if there is a
setting error. In that case, the Communications
Cycle Time Reference Table (words m+15 to m
+18) will not be cleared.

Default
setting

Master
Fixed
Allocation
Setting
1
enabled

None

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Communications
Cycle
Time
Reference
Table
Clear
Switch

OFF→
ON

User

OFF

Unit

3-2-2

Controlled
by

Unit operation

Clears data in the Communications Cycle Time Reference Table (words m+15 to m+18). The data that is
cleared will be updated with new data.
Returns to OFF after the data in the Communications
Cycle Time Reference Table (words m+15 to m+18)
has been cleared.

Operation condi- Default
tions
setting
CPU Mas- Scan
list
ter
Unit
oper- func- status
ating tion
mode
------None

Software Switches 2 (Word n+1)
All switches are turned ON by the user. The Unit automatically turns them
OFF after the function is executed. Once a function is set by turning a switch
ON (except for the switches listed below), it is saved regardless of whether the
power is turned OFF and back ON again.
• Slave COS Send Switch (bit 12)

• Unit Setup File Restore Switch (bit 14)
• Unit Setup File Backup Switch (bit 15)
If multiple bits are turned ON simultaneously, the requests will generate errors
but they will not alter Unit operation. The corresponding error bits in the following words will turn ON if a request made by a software switch ends in an error.
• Slave Status 1
Word n+1 [n = CIO 1,500 + (25 x unit number)]
Bit

Name

Status

Controlled by

Unit operation

Operation
conditions

Default
setting

CPU Slave
Unit funcoper- tion
ating
mode
00
to
05

Reserved
by system

---

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Controlled by

Unit operation

Operation
conditions

Default
setting

CPU Slave
Unit funcoper- tion
ating
mode
06

Slave
Enable
Switch

OFF→
ON

Slave Stop OFF→
Switch
ON

OFF

User

Enables slave communications. (The Unit automatically Program
restarts.)
To use fixed allocations, turn this switch ON after turning mode
ON a Slave Fixed Allocation Setting Switch (word n+1,
bits 08 to 10). To used user-set allocations, turn this
switch ON after turning ON the User Setting Switch
(word n+1, bit 11).
Once enabled, the Unit will function as a slave regardless of whether the power is turned OFF and back ON
again until the Slave Stop Switch (word n+1, bit 07) is
turned ON.
Note 1. Slave communications are enabled in the
default setting.
2. If this bit is turned ON with Slave enabled, a
Unit status error will occur and a C2 error will
be displayed on the 7-segment display. The
7-segment display will go out automatically
after 30 seconds.

Unit

Returns to OFF at the start of slave communications.

User

Stops slave communications. (The Unit automatically
Prorestarts.) Turn this switch ON if the Unit will be used only gram
for master communications.
mode

Unit

Returns to OFF after slave communications stop.

Disabled

Slave
disabled

Disabled

Slave
disabled

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Controlled by

Unit operation

Operation
conditions

Default
setting

CPU Slave
Unit funcoper- tion
ating
mode
08

OFF→
Slave
Fixed Allo- ON
cation Setting 1
Switch

OFF
09

OFF→
Slave
Fixed Allo- ON
cation Setting 2
Switch

OFF→
Slave
Fixed Allo- ON
cation setting 3
switch

OFF

User

ProAllocates the following words to the slave.
gram
• OUT 1 area (input to the CPU Unit):
mode
CIO 3370 (1 word allocated)
• IN 1 area (output from the CPU Unit):
CIO 3270 (1 word allocated)
• OUT 2 area: Not used
• IN 2 area: Not used
Note 1. Slave communications must be disabled
before this switch is turned ON. After the
switch is turned ON, turn the Slave Enable
Switch (word n+1, bit 06) ON to enable Fixed
Allocation Setting 1.
2. This is the default setting for the Unit.
3. The words allocated by this switch are used
as the I/O area for the slave. (Use the Slave
Enable Switch (word n+1, bit 06).)

Unit

Returns to OFF after fixed allocations have been set.

User

Allocates the following words to the slave.
• OUT 1 area (input to the CPU Unit):
CIO 3570 (1 word allocated)
• IN 1 area (output from the CPU Unit):
CIO 3470 (1 word allocated)
• OUT 2 area: Not used
• IN 2 area: Not used
Note Same as notes 1 to 3 for bit 08.

Unit

Returns to OFF after fixed allocations have been set.

User

Allocates the following words to the slave.
• OUT 1 area (input to the CPU Unit):
CIO 3770 (1 word allocated)
• IN 1 area (output from the CPU Unit):
CIO 3670 (1 word allocated)
• OUT 2 area: Not used
• IN 2 area: Not used
Note Same as notes 1 to 3 for bit 08.

Unit

Returns to OFF after fixed allocations have been set.

Enabled

Program
mode

Disabled

Program
mode

Disabled

Slave
Fixed
Allocation setting 1
enabled

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Controlled by

Unit operation

Operation
conditions

Default
setting

CPU Slave
Unit funcoper- tion
ating
mode
11

User

Reads setup data from the Slave User Allocations Setup ProTable in the DM Area and registers slave user-set alloca- gram
mode
tions.
Once registered, the Unit will operate with slave user-set
allocations regardless of whether the power is turned
OFF and back ON again until slave communications are
disabled (i.e., until Slave Disable Switch (word n+1, bit
07) is turned ON).
Slave communications must be disabled before this
switch is turned ON.
Note After the switch is turned ON, turn the Slave
Enable Switch (word n+1, bit 06) ON to enable
user-set allocations.

Unit

Returns to OFF at the start of operation for slave userset allocations.
Note The Slave Function Enable/Stop Failed Flag
(word n+14, bit 08) in Unit Status 2 will turn ON if
there is a setting error.

Slave
OFF→
COS Send ON
Switch
OFF

User

Sends COS IN data to the master.

Unit

Returns to OFF after transmission is completed regardless of whether it was completed normally or in error.

Reserved
by system

---

Status

Controlled by

Slave User OFF→
ON
Allocations
Switch

OFF

Bit

Name

Unit Setup OFF→
ON
File
Restore
Switch

OFF

Unit operation

Disabled

Slave
Fixed
Allocation setting 1
enabled

---

None

---

Operation conditions
CPU Mas- Scan Slave
list functer
Unit
oper- func sta- tion
ating tion tus
mode

User

Reads Unit settings (scan list, communica- Protions cycle time settings, etc.) from the file gram
mode
on a Memory Card in the CPU Unit and
writes the data as Unit settings. See7-2
Memory Card Backup Functions for details.
(The Unit automatically restarts.)
Note After the file data is read, the Unit
automatically restarts with the new
data.

Unit

Returns to OFF when the Unit restarts if
the data is read properly.
Note The File Read/Write Error Flag
(word n+11, bit 08) in Unit Status 2
will turn ON if there is a setup data
error or a file read error.

---

Default
setting

None

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Unit Setup OFF→
ON
File
Backup
Switch

OFF

Controlled by

Operation conditions
CPU Mas- Scan Slave
list functer
Unit
oper- func sta- tion
ating tion tus
mode

User

Writes user settings (scan list, communica- --tions cycle time settings, etc.) as a file on
the Memory Card in the CPU Unit. See 7-2
Memory Card Backup Functions for details.
Note Files can only be backed up with
the scan list enabled.

Unit

Returns to OFF after the data is written to
a file.
Note The File Read/Write Error Flag
(word n+11, bit 08) in Unit Status 2
will turn ON if data failed to be written to file.

Note

3-2-3

Unit operation

Enabled
(See
note
1.)

---

Default
setting

None

1. When the Master function is enabled, the Unit Setup File cannot be backed
up unless the scan list is enabled.

Master COS Send Switches (Words n+2 to n+5)
One Master COS Send Switch is allocated to each slave node address. If the
switch for a slave is turned ON, then COS output data will be sent to that
slave.
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit09 Bit08 Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00
n+2

n+3

n+4

n+5

More than one of these switches may be turned ON at the same time. The
switches will return to OFF starting at the switches for the slaves to which
COS data has been sent.
If a send error occurs, the corresponding bit will turn ON in Slave Detailed
Status.

3-2-4

Disconnect/Connect Switches (Words n+6 to n+9)
One Disconnect/Connect Switch is allocated to each slave node address. If
the switch for a slave is turned ON, then remote I/O communications to that
slave will be temporarily stopped (i.e., it is disconnected from the network). A
communications error will occur at the end for any slave has been disconnected if the corresponding switch is turned ON during communications.
These switches are used primarily to replace slaves or to reserve a place for a
slave that will be added (when a Unit is registered in the scan list but not yet
connected). A communications error and verification error for the slave that
has been disconnected will not be generated at the master as long as the corresponding switch is ON.
Note These switches do not add or remove slaves from the registered scan list.

Section 3-2

Allocated CIO Area Words

Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit09 Bit08 Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00
n+6

n+7

n+8

n+9

Remote I/O communications will restart if a user turns OFF a bit that is ON.
More than one of these switches may be turned ON at the same time. If the
switch for a slave that is not using remote I/O communications is turned ON, it
will be ignored.
A Unit that has been disconnected can still perform message communications.
Turning ON this bit does not effect the communications cycle time (except that
it increases blank time in the communications cycle).
Note All Disconnect/Connect Switches are cleared and return to OFF
when the power is turned OFF. If required, write the ladder program
to turn them back ON when the power is turned ON.
Bit
–

Name
Disconnect/
Connect
Switch

Status

Controlled
by

Unit operation

User

Stops remote I/O communications for the corresponding Slave.

OFF

User

Starts remote I/O communications for the corresponding Slave.

Section 3-2

Allocated CIO Area Words

3-2-5

Unit Status 1 (Word n+10)

Word n+10 [n = CIO 1,500 + (25 x unit number)]
Bit
00

Name
Unit Error
Flag

Master
Function
Error Flag

Status

Controlled
by

Unit operation

Unit

Displays DeviceNet Unit operating errors.
This bit turns ON if any bit from 01 to 15 in Unit Status 1 turns ON. (OR of
bits 01 to 15)
Usage example: When writing the ladder program for remote I/O communications, set a NC input conditions for this bit to control Slave I/O processing.

OFF

Unit

Indicates that the an error has not occurred or turns OFF when the error
has cleared.

Unit

Indicates that a master error has occurred. (Master Status 1 (See word
n+12.))
The master errors are as follows:
• Verification Error Flag (word n+12, bit 00)
• Structure Error Flag (word n+12, bit 01)
• Remote I/O Communications Error Flag (word n+12, bit 02)
• Invalid Scan List Data Flag (word n+12, bit 04)
• Remote I/O Refresh Error Flag (word n+12, bit 05)

OFF

Unit

Indicates that the error has not occurred or turns OFF when the error has
been cleared.

Reserved by --system

---

Slave Function Error
Flag

Unit

Indicates that a slave error has occurred. (Slave Status 1 (See word
n+14.))
The slave errors are as follows:
• Remote I/O Communications Error Flag for OUT 1/ IN 1 (word n+14, bit
02)
• Remote I/O Communications Error Flag for OUT 2/ IN 2 (word n+14, bit
03)
• Invalid Setup Data Flag (word n+14, bit 04)
• Remote I/O Refresh Error Flag (word n+14, bit 05)

OFF

Unit

Indicates that the error has not occurred or turns OFF when the error has
been cleared.

Unit

Indicates an error in internal memory where the error history is stored.
(The error occurs when the Unit starts up or when the error history is written.)

OFF

Unit

Indicates that the error has not occurred. Once this error has occurred, the
bit will remain ON and will not return to OFF.

Unit

Indicates that a Bus OFF error (communications were stopped by multiple
transmissions) has occurred. When a Bus OFF occurs, the Unit goes
offline and all communications stop (remote I/O communications stop,
slave operation stop, and message communications are disabled).

OFF

Unit

Indicates that the error has not occurred. Once this error has occurred, the
bit will remain ON and will not return to OFF.

Unit

Indicates a duplicate node address check error when the Unit starts up.
The Unit goes offline and all communications stop. (Remote I/O communications stop, slave operation stop, and message communications are disabled.)

OFF

Unit

Indicates that the error has not occurred. Once this error has occurred, the
bit will remain ON and will not return to OFF.

Unit Memory Error
Flag

Bus Off Flag ON

Node
Address
Duplicated
Flag

Section 3-2

Allocated CIO Area Words
Bit
07

Name
Network
Power Error
Flag

Send Timeout Flag

Status

Controlled
by

Unit operation

Unit

Indicates that there is no power from the network power supply.
Note Remote I/O communications stop if DIP switch pin 3 (remote I/O
communications stop/continue setting for a communications error)
on the front panel is ON (stop).

OFF

Unit

Indicates that the error has not occurred or turns OFF when the network
power supply has restarted.

Unit

Indicates that a send timeout occurred due to one of the following factors:
• No slaves present.
• Mismatched baud rate settings.
Note Remote I/O communications stop if DIP switch pin 3 (remote I/O
communications stop/continue setting for a communications error)
on the front panel is ON (stop).

OFF

Unit

Returns to OFF at the start of communications even with just one slave
present.

09
to
11

Reserved by --system

---

Routing
Table Error
Flag

Unit

Incorrect data in the routing tables set in the CPU Unit. Refer to 1-6-3 Creating Routing Tables.

OFF

Unit

Indicates that the error has not occurred if a routing table has been set.

Invalid Message Timer
List Flag

Unit

Indicates that the data in the message monitoring timer list is not correct.

OFF

Unit

Indicates that the data in the message monitoring timer list is correct.
Turns OFF if the Configurator registers a message monitoring timer list
when the error occurs.
The message monitoring timer list shows the time spent waiting for
responses in message communications. It is set from the Configurator.

---

14
to
15

Reserved by --system

3-2-6

Unit Status 2 (Word n+11)

Word n+11 [n = CIO 1,500 + (25 x unit number)]
Bit
00

Name
Online Flag

Status

Controlled
by

Unit operation

Unit

Indicates that the Unit is online. The Unit normally goes online automatically.
Note When executing message communications instructions (SEND/
RECV/CMND) from the ladder program, use an AND of input conditions for the Network Communications Enabled Flag in the CPU
Unit (A20200 to A20207) and this bit.

OFF

Unit

Indicates that the Unit is offline. A Unit will go offline under the following
conditions:
• Operation is stopped by the hardware/software check at startup.
• An error occurred in the duplicate node address check (word n+10, bit
06).
• A Bus OFF error has occurred (word n+10, bit 05).

Section 3-2

Allocated CIO Area Words
Bit
01

Name

Status

Remote I/O ON
Communications Flag

OFF

Controlled
by

Unit operation

Unit

Indicates that remote I/O communications are being performed for the
master function. Normally, the Unit will perform remote I/O communications automatically.
Note This bit only indicates the start of remote I/O communications, and
does not indicate whether data has actually been exchanged with
slaves. Actual data exchange between one or more slaves is monitored from I/O Data Communications Flag (word n+12 bit 15).
Therefore use I/O Data Communications Flag rather than this bit
as the input condition in I/O processing for slaves from the ladder
program.

Unit

Indicates remote I/O communications have stopped. This bit turns OFF in
order to stop communications under the following conditions:
• No slaves are registered in the scan list.
• Invalid Setup Data Flag (word n+12, bit 04)
• A remote I/O communications error or sending error (network power error or send timeout error) occurred with DIP switch pin 3 (remote I/O
communications stop/continue setting for communications errors) on
the front panel turned ON.
• The remote I/O Communications Stop Switch (word n, bit 04) is ON.

---

Reserved by --system

Master
Function
Enabled
Flag

Unit

Indicates that master communications are enabled (Unit is operating as a
Master) (default setting).

OFF

Unit

Indicates that master communications are disabled.

Scan List
Disabled
Flag

Unit

Indicates that the Unit is operating with the scan list disabled (default setting).

Reserved by --system

Automatic
Slave
Connection
Flag

OFF

Unit

Indicates that the Unit is operating with the scan list enabled.

---

Unit

Indicates that the connection type was automatically set in the slave scan
list.
This flag is valid only with slave communications enabled.

OFF

Unit

Indicates that the connection type was set from the Configurator in the
slave scan list.
Note The type of connection in slave communications cannot be specified without the Configurator. If it is not set from the Configurator, it
will be set automatically.

Slave Func- ON
tion Enabled
OFF
Flag
File Read/
ON
Write Error
Flag

Unit

Indicates that slave communications are enabled.

Unit

Indicates that slave communications are disabled (default setting).

Unit

Indicates that an error has occurred when user setup data is read from a
Memory Card in the CPU Unit or when data is written as a file to a Memory Card.

OFF

Unit

Indicates that the error has not occurred. Turns OFF when the Unit has
successfully completed the operation.

09
to
14

Reserved by --system

---

Error History Flag

Unit

Indicates that an error history has been registered. Turns ON at the first
error history for the Unit.

OFF

Unit

Indicates that no errors have been registered in the error history. Turns
OFF when the Unit receives an error history clear request.

Section 3-2

Allocated CIO Area Words

3-2-7

Master Status 1 (Word n+12)

Word n+12 [n = CIO 1,500 + (25 x unit number)]
Bit
00

Name
Verification
Error Flag

Structure
Error Flag

Status

Controlled
by

Unit operation

Unit

Indicates that the data in the slave registered in the scan list is different
from the data from the actual slave. It occurs with the scan list enabled.

OFF

Unit

Indicates that a verification error has not occurred or turns OFF when a
verification error is cleared.

Unit

Indicates that I/O allocations cannot be made with the scan list disabled.

OFF

Unit

Indicates that a structure error has not occurred or turns OFF when a
structure error is cleared.

Unit

Indicates that a remote I/O communications timeout has occurred during
remote I/O communications with slaves.
Remote I/O communications will stop if DIP switch pin 3 (remote I/O communications stop/continue setting for communications errors) on the front
panel is ON (stop).
This error occurs with the scan list enabled or disabled.

Unit

Indicates that a remote I/O communications error has not occurred or
turns OFF when a remote I/O communications error is cleared.

Remote I/O ON
Communications Error
Flag

OFF
03

Reserved by --system

---

Invalid Scan
List Data
Flag

Unit

Indicates that there is incorrect data in the scan list (mismatched checksum). Remote I/O communications in the Unit will stop. (Slave operations
and message communications will continue.)

OFF

Unit

Indicates that the scan list data is correct.
Turns OFF when an incorrect scan list data error occurs and then the correct scan list is registered.

Unit

Indicates that the I/O memory in the CPU Unit that is to be refreshed is not
present during I/O refreshing for the master. It occurs in several situations,
such as when an I/O area is allocated in an EM bank that is not present.

OFF

Unit

Indicates that no master I/O refresh errors have occurred.

---

Unit

Indicates that an error has occurred in one of the following operations:
• Master enable (word n, bit 06)
• Master stop (word n, bit 07)
Once this bit turns ON, it will remain ON until the operation is successfully
completed.

OFF

Unit

Indicates that the error has not occurred. The bit turns OFF when the
operation is successfully completed.

Unit

Indicates that an error has occurred in one of the following operations:
• Master user-set allocations user setting (word n, bit 11)
Once this bit turns ON, it will remain ON until the operation is successfully
completed.
Details on the master user-set allocation results are output to the Master
User Allocations Setup Table.

Unit

Indicates that the error has not occurred. The bit turns OFF when the
operation is successfully completed.

Remote I/O
Refresh
Error Flag

06
to
07

Reserved by --system

Master
Function
Enable/
Disable
Failed Flag

ON
User
Allocation
Area Setting
Failed Flag

OFF

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Unit operation

Unit

Indicates that an error has occurred in one of the following operations:
• Fixed Allocation Setting 1 (word n, bit 08)
• Fixed Allocation Setting 2 (word n, bit 09)
• Fixed Allocation Setting 3 (word n, bit 10)
Once this bit turns ON, it will remain ON until the operation is successfully
completed.

OFF

Unit

Indicates that the error has not occurred. The bit turns OFF when the
operation is successfully completed.

Unit

Indicates that an error has occurred in one of the following operations:
• Scan list enabled (word n, bit 00)
• Scan list clear (word n, bit 01)
Once this bit turns ON, it will remain ON until the operation is successfully
completed.

OFF

Unit

Indicates that the error has not occurred. The bit turns OFF when the
operation is successfully completed.

Communica- ON
tions Cycle
Time
Setting
Failed Flag
OFF

Unit

Indicates that an error has occurred when setting the communications
cycle time (word n, bit 12).
Once this bit turns ON, it will remain ON until the next communications
cycle time is set.

Unit

Indicates that the error has not occurred. The bit turns OFF when the
operation is successfully completed.

13
to
14

Reserved by --system

---

I/O Data
ON
Communications Flag

Unit

Indicates that at least one slave is performing remote I/O communications.
Usage example: When writing the ladder program for remote I/O communications, set a NO input condition for this bit to control slave I/O processing.

Unit

Indicates that remote I/O communications are not being conducted with
any slaves.

ON
Fixed
Allocation
Area Setting
Failed Flag

Controlled
by

Scan List
Register/
Clear Failed
Flag

OFF

3-2-8

Master Status 2 (Word n+13)
The leftmost eight bits indicate the status of master I/O allocations.
Word
n+13

Bit 15

Bit 08 Bit 07

Master I/O Allocation Status

Bit 00
Reserved by system

Master I/O Allocation Status
Code

Details

00 Hex

Unit starting up

01 Hex

Fixed allocation status 1 (with the scan list disabled)

02 Hex

Fixed allocation status 2 (with the scan list disabled)

03 Hex

Fixed allocation status 3 (with the scan list disabled)

11 Hex

Fixed allocation status 1

12 Hex

Fixed allocation status 2

13 Hex

Fixed allocation status 3

20 Hex

User-set allocations in the allocated DM Area words

30 Hex

User-set allocations from the Configurator

80 Hex

Master function disabled

Section 3-2

Allocated CIO Area Words

3-2-9

Slave Status 1 (Word n+14)

Word n+14 [n = CIO 1,500 + (25 x unit number)]
Bit

Name

Status

Controlled
by

Unit operation

00
to
01

Reserved by --system

---

Remote I/O ON
Communications Error
OFF
Flag for
OUT 1/ IN 1

Unit

Indicates that a communications error has occurred in the OUT 1/IN 1
slave I/O connection.

Unit

Indicates that a remote I/O communications error has not occurred or
turns OFF when a remote I/O communications error is cleared.

Unit

Indicates that a communications error has occurred in the OUT 2/IN 2
Slave I/O connection.

Unit

Indicates that a remote I/O communications error has not occurred or
turns OFF when a remote I/O communications error is cleared.

Unit

Indicates that there is incorrect data in slave settings (mismatched checksum). The Unit stops slave communications. (Remote I/O communications and message communications continue.)

OFF

Unit

Indicates that a Unit is operating with the correct slave setup data or without slave communications being set.
Turns OFF when the slave is properly set after a slave setup data error
occurs.

Unit

Indicates that the I/O memory in the CPU Unit that is to be refreshed is not
present during I/O refreshing for the slave function. It occurs in several situations, such as when an I/O area is allocated in a EM bank that is not
present.

OFF

Unit

Indicates that a slave I/O refresh error has not occurred.

---

Unit

Indicates that an error has occurred in one of the following operations:
• Slave function enabled (word n+1, bit 06)
• Slave function disabled (word n+1, bit 07)
Once this bit turns ON, it will remain ON until the operation is successfully
completed.

OFF

Unit

Indicates that the error has not occurred. The bit turns OFF when the
operation is successfully completed.

Unit

Indicates that an error has occurred in the following operation:
• Slave user-set allocations user setting (word n+1, bit 11)
Once this bit turns ON, it will remain ON until the operation is successfully
completed.

Unit

Indicates that the error has not occurred. The bit turns OFF when the
operation is successfully completed.

Unit

Indicates that an error has occurred in one of the following operations:
• Slave Fixed Allocation Setting 1 (word n+1, bit 08)
• Slave Fixed Allocation Setting 2 (word n+1, bit 09)
• Slave Fixed Allocation Setting 3 (word n+1, bit 10)
Once this bit turns ON, it will remain ON until the operation is successfully
completed.

Unit

Indicates that the error has not occurred. The bit turns OFF when the
operation is successfully completed.

Remote I/O ON
Communications Error
OFF
Flag for
OUT 2/ IN 2
Invalid
Setup Data
Flag

Remote I/O
Refresh
Error

06
to
07

Reserved by --system

Slave
Function
Enable/
Disable
Failed Flag

ON
User
Allocation
Area Setting
Failed Flag
OFF

ON
Fixed
Allocation
Area Setting
Failed Flag

OFF

Section 3-2

Allocated CIO Area Words
Bit
11

Name
COS Send
Failed Flag

Status

Controlled
by

Unit operation

Unit

Indicates that an attempt was made to send COS to a Master using the
Slave COS send switch (Slave COS Send Switch in n+1) in Software
Switches 2, but the transmission failed.
The following may cause the failure of COS signal transmission.
• A COS connection was not established with a master.
• Bus OFF error occurred.
• A network power error occurred.
• A send timeout occurred.
Once this bit turns ON, it will remain ON until the operation is successfully
completed.

OFF

Unit

Indicates that the error has not occurred. The bit turns OFF when COS is
successfully sent.

Connection
2 Established Flag

Unit

Indicates that an I/O connection has been established for OUT 2/IN 2.
This bit turns ON even if valid I/O data has not been exchanged.

OFF

Unit

Indicates that an I/O connection has not been established for OUT 2/IN 2.

Connection
1 Established Flag

Unit

Indicates that an I/O connection has been established for OUT 1/IN 1.
This bit turns ON even if valid I/O data has not been exchanged.

OFF

Unit

Indicates that an I/O connection has not been established for OUT 1/IN 1.

Remote I/O ON
Communications Flag for
OUT 2/IN 2 OFF

Unit

Indicates that an I/O connection has been established for OUT 2/IN 2 and
the slave is conducting normal remote I/O communications with the master.

Unit

Indicates that an I/O connection has been established for OUT 2/IN 2 and
the slave is not conducting normal remote I/O communications with the
master.
Usage example: When writing the ladder program for slave remote I/O
communications, used a NO input conditions for this bit to control I/O processing with the master.

Remote I/O ON
Communications Flag for
OUT 1/IN 1 OFF

Unit

Indicates that an I/O connection has been established for OUT 1/IN 1 and
the Slave is conducting normal remote I/O communications with the Master.

Unit

Indicates that an I/O connection has been established for OUT 1/IN 1 and
the slave is not conducting normal remote I/O communications with the
master.
Usage example: When writing the ladder program for slave remote I/O
communications, used a NO input conditions for this bit to control I/O processing with the master.

Section 3-2

Allocated CIO Area Words

3-2-10 Slave Status 2 (Word n+15)
Word

Bit 15

Bit 08 Bit 07

Bit 00

Slave I/O Allocation Status

n+15

Master Node Addresses

Master Node Address

This indicates the node address of the remote master for slave communications.
Name

Range

Master Node
Address

Slave I/O Allocation Status

Details

0000 to 003F Hex
(0 to 63)

This information is valid when the Remote
I/O Communications Flag (word n+14, bit
14 or 15) is ON in Slave Status 1.

This indicates the I/O allocation status of the slave.
Code

Details

00 Hex

Unit starting up

01 Hex

Fixed Allocation Setting 1

02 Hex

Fixed Allocation Setting 2

03 Hex

Fixed Allocation Setting 3

20 Hex

User-set allocations using allocated DM Area words

30 Hex

Set from the Configurator

80 Hex

Slave function disabled

3-2-11 Registered Slave Table (Words n+16 to n+19)
This table indicates the slaves that are registered in the master scan list. The
bits correspond to node addresses. This table is updated when the Unit starts
up and when a scan list is registered.
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit09 Bit08 Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00
n+16

n+17

n+18

n+19

Operation with the Scan
List Disabled

This table indicates the slaves to which a connection has been established at
least once. When registering a scan list using the Scan List Enable Switch
(word n, bit 00), the bits corresponding to the slaves that are registered are
turned ON in this table.

Operation with the Scan
List Enabled

This table indicates the slaves that have been registered in the scan list.

Bit
–

Name
Slave
Registered
Flags

Status

Controlled
by

Unit operation

Unit

With the scan list disabled: Indicates slaves to which a connection has
been established at least once.
With the scan list enabled: Indicates that a slave has been registered in
the scan list.

OFF

Unit

Indicates that a slave has not been registered in the scan list.

Section 3-2

Allocated CIO Area Words

3-2-12 Normal Slave Table (Words n+20 to n+23)
This table indicates the slaves that are communicating normally with the master. The bits correspond to node addresses. The bits for slaves for which normal I/O connections have been made are turned ON in this table. These are
not flags to show the remote I/O communications status.
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit09 Bit08 Bit07 Bit06 Bit05 Bit04 Bit03 Bit02 Bit01 Bit00
n+20

n+21

n+22

n+23

In the following cases, the status of communications up to the most recent
status is saved and then status is cleared when communications are restarted
(i.e., when connection is made again).
• Communications power supply error
• Send timeout
• Remote I/O communications stopped
• When a communications error occurs with DIP switch pin 3 (remote I/O
communications stop/continue setting for communications errors) on the
front panel ON (stop)
This table is updated continuously.
Bit
–

Name
Slave Normal Flags

Status

Controlled
by

Unit operation

Unit

Indicates normal connection.

OFF

Unit

Indicates that not all connections have been made.

3-2-13 C200H Master Replacement Master Status 1 (Word n+24)
To simplify changes to ladder programs for a C200H DeviceNet Master Unit
(C200HW-DRM21-V1), Master Replacement Status 1, which has the same bit
configuration as Master Status Area 1, is provided for C200H DeviceNet Master Units.
Word n+24 [n = CIO 1,500 + (25 x unit number)]
Bit

Name

Status

Controlled
by

C200HWDRM21-V1
status

Details and CS1W-DRM21 status

Unit Memory
Error Flag

ON/OFF

Unit

Switch Setting Error or
EEPROM
Error Flag

This is the same as a Unit memory error (word n+10, bit
04).
Note This bit is also used for incorrect switch settings
for the C200HW-DRM21-V1. The Unit will not start
if the switch settings are incorrect.

Node
Address
Duplicated/
Bus Off Flag

ON/OFF

Unit

Node
Address
Duplicated/
Bus Off Flag

This bit turns ON if any one of the following flags turns
ON:
• Node Address Duplicated Flag (word n+10, bit 06)
• Bus Off Flag (word n+10, bit 05)

Reserved by
system

---

Reserved by
system

Reserved by system

Section 3-2

Allocated CIO Area Words
Bit

Name

Status

Controlled
by

C200HWDRM21-V1
status

Details and CS1W-DRM21 status

Configuration Error
Flag

ON/OFF

Unit

Configuration Error
Flag

This bit turns ON if any of the following flags turn ON:
• Routing Table Error Flag (word n+10, bit 12)
• Invalid Message Timer List Flag (word n+10, bit 13)
• Invalid Scan List Data Flag (word n+12, bit 04)
• Remote I/O Refresh Error Flag (word n+12, bit 05)
Note The C200HW-DRM21-V1 does not support slave
communications. Scan list data errors for slave
communications are not relevant.

Structure
Error Flag

ON/OFF

Unit

Structure
Error Flag

This is the same as the Structure Error Flag in word n+12,
bit 01.

Send Error
Flag

ON/OFF

Unit

Send Error
Flag

This bit turns ON if any one of the following bits turns ON:
• Network Power Error Flag (word n+10, bit 07)
• Send Timeout Flag (word n+10, bit 08)

Communications Error
Flag

ON/OFF

Unit

Communications Error
Flag

This is the same as the Remote I/O Communications
Flag (word n+12, bit 02).

Verification
Error Flag

ON/OFF

Unit

Verification
Error Flag

This is the same as the Verification Error Flag in word
n+12, bit 00.

ON/OFF
I/O Data
Communications Not
Running Flag

Unit

I/O Data
Communications Not
Running
Flag

This operates in the reverse way of the Remote I/O Communications Flag (word n+11 bit 01).

Reserved by
system

---

Scan List
Operation
Completed
Flag

---

Reserved by
system

---

Scan List
Operation
Error Flag

---

Reserved by
system

---

Communica- --tions Error
Stop Cleared
Flag

Message
Communications Permitted Flag

ON/OFF

Unit

Message
Communications Permitted Flag

Invalid Scan ON/OFF
List Data Flag

Unit

Invalid Scan The same operation as the Invalid Scan List Data Flag
List Data Flag (word n+11, bit 04).

Error Flag

ON/OFF

Unit

Error Flag

This bit turns ON if bit 00, 01 or 03 to 07 in this word
(n+24) turns ON.

Remote I/O
Communications Flag

ON/OFF

Unit

Remote I/O
Communications Flag

The same as I/O Data Communications Flag (word n+12
bit 15).

The same as the Online Flag in word n+11, bit 00.
Note When executing message communications
instructions (SEND/RECV/CMND) from the ladder
program, use an AND of input conditions for the
Network Communications Enabled Flag in the
CPU Unit (A20200 to A20207) and this bit.

Note Although the bit configurations are the same, the word addresses are different
(because this is a CS/CJ-series CPU Bus Unit). Change the words using a
replacement operation from the Programming Device.

Section 3-3

Allocated DM Area Words

3-3

Allocated DM Area Words
Data is stored at the offset positions shown in the figure below starting from
the first word allocated to the Unit in the DM Area.
The first word can be calculated as follows from the unit number setting:
First word m = D30000 + (25 x unit number)
Word
m

3-3-1

Bit 15

Bit 00
Communications Cycle Time Setup Table

m+1
to
m+7

Master User Allocations Setup Table (7 words)

m+8
to
m+14

Slave User Allocations Setup Table (7 words)

m+15
to
m+18

Communications Cycle Time Reference Table (4 words)

m+19
to
m+30

Master User-set Allocations Reference Table (12 words)

m+31
to
m+42

Slave User-set Allocations Reference Table (12 words)

m+43
to
m+74

Slave Detailed Status Table (32 words)

m+75
to
m+99

Reserved by system

Direction
Outputs
CPU Unit → DeviceNet Unit

I/O
CPU Unit ↔ DeviceNet Unit

Inputs
CPU Unit ← DeviceNet Unit

Communications Cycle Time Setup Table
This table sets the communications cycle time for the master.
The standard communications cycle time can be updated with these switches.
Temporary Setting Word n, bit 12
Switch for Communications Cycle
Time
Communications
Word n, bit 13
Cycle Time Reference Table Clear
Switch

Returns to the previous setting when the power is turned
OFF or the Unit is restarted.
Also effective the next time
the Unit is started, because
the set value is stored in nonvolatile memory.

Section 3-3

Allocated DM Area Words
Word
m

Name
Communications
Cycle Time Setting

Bit 15

Bit 00

Communications cycle time setting (ms)

Range

Details

0000 to 01F4 Hex Sets the communications cycle time in milli(0 to 500)
seconds. Setting range: 0 to 500 ms
If this bit is set to 0, the optimum time calculated by the Unit will be used. If a value
higher than 500 ms is set, then the Unit will
operate at 500 ms.
If the setting cannot be correctly made for
some reason, the Scan List Register/Clear
Failed Flag (word n+12, bit 11) in Master Status 1 and the Temporary Setting Switch for
Communications Cycle Time (word n, bit 12)
will be turned OFF.

Note If the setting is smaller than the optimum communications cycle time calculated by the Unit and stored internally in the Unit, then the value calculated by
the Unit will be used.

3-3-2

Master User Allocations Setup Table
This table is set by the user to specify the I/O words used by the master. Only
OUT block 1 and IN block 1 can be set using this table.
Word
m+1
m+2
m+3
m+4
m+5
m+6
m+7

Bit 15

Bit 08 Bit 07
Reserved by system

Bit 00
OUT block 1 area

First word in OUT block 1
Reserved by system

IN block 1 area

First word in IN block 1
Reserved by system

Allocation size setup table area

First word in the allocation size setup table
Setting results

Note OUT blocks 1 and 2 and IN blocks 1 and 2 can be set from the Configurator.
I/O allocations can be updated in the master by setting this table and turning
ON the Master User-set Allocations Switch (word n, bit 11). The Unit will
restart automatically and start operating with the scan list enabled.

Section 3-3

Allocated DM Area Words

Note Make sure the CPU Unit is in PROGRAM mode and the master function is
enabled before you set these values.
Name
OUT block 1 area

Range
See Areas and
Word Ranges.

Details
Specifies the OUT block area. The OUT
block is not allocated when set to 00 Hex.

First word in OUT
block 1

Specifies the first word for the OUT block.

IN block 1 area

Specifies the IN block area. The IN block
is not allocated when set to 00 Hex.

First word in IN
block 1

Specifies the first word for the IN block.

Allocation size
setup table area

Specifies the area for the allocation size
setup table. An area is not allocated when
set to 00 Hex.

First word in the
allocation size
setup table
(See note.)

Specifies the first word of the allocation
size setup table.

Setting results

See Setting
Results.

Gives the setting results.

Note See Allocation Size Setup Table (p. 84) for more details on the first
word of the allocation size setup table.
Areas and Word Ranges
Code

Name

Word range

00 Hex

---

The block is not allocated.

01 Hex

CIO Area (CIO)

0000 to 17FF Hex (0 to 6143)

03 Hex

Data Memory (DM)

0000 to 7FFF Hex (0 to 32767)

04 Hex

Work Area (WR)

0000 to 01FF Hex (0 to 511)

05 Hex

Holding Relay (HR)

0000 to 01FF Hex (0 to 511)

08 to 14
Hex

Expansion Data Memory (EM)
Bank 0 to bank C (13 banks)

0000 to 7FFF Hex (0 to 32767) for
all banks

Section 3-3

Allocated DM Area Words
Setting Results
Code

3-3-3

Description

Details

0000
Hex

Completed normally

---

1101
Hex

No area

• Incorrect area setting.
• The allocated size in the allocation size setup
table is 0.

1103
Hex

Address range specifi- The first word is outside the setting range.
cation error

110C
Hex

Parameter error

• The OUT or IN size in the allocation size setup
table exceeds 200 bytes.
• Both the OUT and IN blocks are set for no allocations.
• No slaves are allocated.

1104
Hex

Address range overflow

• The block or the allocation size setup table exceeds the valid word range.
• The block is larger than 1,000 bytes.

2201
Hex

Wrong operating
mode

The CPU Unit is not in PROGRAM mode.

2201
Hex

Unit busy

Service cannot be executed because the Unit is
busy.

2606
Hex

Cannot execute service

The Unit master communications have not been
disabled.

Allocation Size Setup Table
The following allocation size setup tables must be set in the I/O memory in the
CPU Unit to use the Master User Allocations Setup Table.
The number of bytes set in the allocation size setup table are allocated in
word units in order of node addresses for OUT block 1 and then IN block 1.
Set the sizes within a range from 0 to 200 bytes (100 words).
Word

Bit 15

Bit 08 Bit 07

Bit 00

Node address 0 OUT size (bytes)

Node address 0 IN size (bytes)

I+1

Node address 1 OUT size (bytes)

Node address 1 IN size (bytes)
:
:

I+63

Node address 63 OUT size (bytes)

Node address 63 IN size (bytes)

Section 3-3

Allocated DM Area Words
Setting Example

The following example shows the allocation when the size (bytes) for OUT
block 1 and IN block 1 is set in the allocation size setup table using the specified values.
Node address 0: OUT size: 1 byte, IN size: 5 bytes
Node address 1: OUT size: 4 byte, IN size: 3 bytes
Node address 2: OUT size: 1 byte, IN size: 2 bytes
Allocation size setup table

I+1

s+1

I+2

s+2

s+3

OUT block 1

Not usable

IN block 1

15
k

k+1

k+2

k+3

k+4

Not usable

k+5
l: First word of the allocation size setup table
s: First word of OUT block 1
k: First word of IN block 1

Note

Not usable
:

02
:

1. The numbers in the OUT 1 and IN 1 blocks represent node addresses.
2. Bytes are allocated in order in the blocks in word units in the order of node
addresses. If the allocated size is 1 byte, the rightmost byte is used, but the
leftmost byte cannot be used.

3-3-4

Slave User Allocations Setup Table
The I/O areas specified here for the slave OUT 1 area, for slave IN 1 area are
used if the slave function is enabled using the Slave User-set Allocations
Switch (word n+1, bit 11).
Word
m+8
m+9

Bit 15

Bit 08 Bit 07
00 Hex fixed

Bit 00
Slave OUT 1 area

First word of the Slave OUT 1 area

m+10

00 Hex fixed

OUT 1 area size (bytes)

m+11

00 Hex fixed

Slave IN 1 area
First word of the Slave IN 1 area

m+12
m+13
m+14

00 Hex fixed

IN 1 area size (bytes)
Setting results

I/O allocations for the slaves can be updated by setting this table and turning
ON the Slave User-set Allocations Switch (word n+1, bit 11). The Unit restarts
automatically and starts operating with the scan list enabled.
Note Make sure the CPU Unit is in PROGRAM mode and the Unit has stopped
slave communications before you set these values.

Section 3-3

Allocated DM Area Words
Name

Range

Slave OUT 1 area
First word in the Slave
OUT 1 area
OUT 1 area size

Details

See Areas
and Word
Ranges.

Specifies the OUT 1 area. The OUT 1
area is not available if this is set at 0.

00 to C8
Hex
(0 to 200
bytes)

Specifies the size of the OUT 1 area in
bytes. The OUT 1 area is not allocated
when set to 00 Hex.

Specifies the first word in the OUT 1 area.

See Areas
and Word
First word in the Slave IN 1 Ranges.
area

Specifies the IN 1 area. The IN 1 area is
not allocated when set to 00 Hex.

IN 1 area size

00 to C8
Hex
(0 to 200
bytes)

Specifies the size of the IN 1 area in
bytes. The IN 1 area is not allocated
when set to 00 Hex.

Setting results

See Setting
Results.

Shows the setting results.

Slave IN 1 area

Specifies the first word in the IN 1 area.

Areas and Word Ranges
Code
00 Hex

Name

Word range

CIO Area (CIO)

The area is not used.

01 Hex

Data Memory (DM)

0000 to 17FF Hex (0 to 6143)

03 Hex

Work Area (WR)

0000 to 7FFF Hex (0 to 32767)

04 Hex

Holding Relay (HR)

0000 to 01FF Hex (0 to 511)

05 Hex

Expansion Data Memory (EM)

0000 to 01FF Hex (0 to 511)

08 to 14
Hex

Bank 0 to bank C (13 banks)

0000 to 7FFF Hex (0 to 32767) for
all banks

Setting Results
Code
0000 Hex

Description
Completed normally

Details
---

1101 Hex

No area

Incorrect area setting.

1103 Hex

Address range
specification error

The first word is outside the setting range.

110C Hex

Parameter error

• The OUT 1 or IN 1 area size exceeds
200 bytes.
• The OUT 1 and IN 1 area size is 0.
• Both the OUT 1 and IN 1 blocks are set
for no allocations.

1104 Hex

Address range
overflow

The allocated area exceeds the valid word
range.

2201 Hex

Wrong operating
mode

The CPU Unit is not in PROGRAM mode.

2201 Hex

Unit busy

Service cannot be executed because the
Unit is busy.

2606 Hex

Cannot execute
service

The Unit slave communications have not
been disabled.

Section 3-3

Allocated DM Area Words

3-3-5

Communications Cycle Time Reference Table
This table can be used to access the present, maximum and minimum communications cycle times. All the values in this table are cleared from the Unit
and the maximum and minimum values are updated with new values when
the Communications Cycle Time Reference Table Clear Switch (word n, bit
13) is turned ON.
Word

Bit 15

Bit 00

m+15

Communications cycle time setting value (ms)

m+16

Communications cycle time present value (ms)

m+17

Communications cycle time maximum value (ms)

m+18

Communications cycle time minimum value (ms)

Ranges
Name

Range

Communications cycle time setting value (ms)
Communications cycle time
present value (ms)
Communications cycle time maximum value (ms)

Details

0000 to
Provide the communications cycle
01F4 Hex (0 time setting as well as the present,
to 500)
maximum, and minimum communications cycle time in millisec0000 to
onds. The default settings is
FFFF Hex
(0 to 65535) 0000Hex (0).

Communications cycle time minimum value (ms)

3-3-6

Master User-set Allocations Reference Table
The settings (area and size) for a maximum of four blocks (OUT block 1, OUT
block 2, IN block 1, and IN block 2) can be accessed in the master user-set
allocations reference table.
The OUT 1 and IN 1 areas and sizes are valid even if a Configurator is not
being used.
Word
m+19

Bit 15

Bit 08 Bit 07
Reserved by system

Bit 00
OUT block 1 area

m+20

First word in OUT block 1

m+21

No. of bytes in OUT block 1

m+22

Reserved by system

IN block 1 area

m+23

First word in IN block 1

m+24

No. of bytes in IN block 1

m+25

Reserved by system

OUT block 2 area

m+26

First word in OUT block 2

m+27

No. of bytes in OUT block 2

m+28

Reserved by system

IN block 2 area

m+29

First word in IN block 2

m+30

No. of bytes in IN block 2

Section 3-3

Allocated DM Area Words
Ranges
Name

Range

Details

See Areas
and Word
Ranges.

Shows the area.

No. of bytes in OUT
block 1/2

0000 to
03E8 Hex
(0 to 1,000
bytes)

Shows the block size in bytes. The OUT block
has not been allocated if this is set at 00 Hex.

IN block 1/2 area

See Areas
and Word
Ranges.

Shows the area.

0000 to
03E8 Hex
(0 to 1,000
bytes)

Shows the block size in bytes. The OUT block
has not been allocated if this is set at 00 Hex.

OUT block 1/2 area
First word in OUT
block 1/2

First word in IN
block 1/2
No. of bytes in IN
block 1/2

Shows the first word for the block.

Areas and Word Ranges
Code

3-3-7

Name

Word range

00 Hex

---

The block is not used.

01 Hex

CIO Area (CIO)

0000 to 17FF Hex (0 to 6143)

03 Hex

Data Memory (DM)

0000 to 7FFF Hex (0 to 32767)

04 Hex

Work Area (WR)

0000 to 01FF Hex (0 to 511)

05 Hex

Holding Relay (HR)

0000 to 01FF Hex (0 to 511)

08 to 14
Hex

Expansion Data Memory (EM)
Bank 0 to bank C (13 banks)

0000 to 7FFF Hex (0 to 32767) for
all banks

Slave User-set Allocations Reference Table
The slave block settings can be accessed in the Slave User-set Allocations
Reference Table. A maximum of two OUT and two IN areas (OUT 1, IN 1,
OUT 2, and IN 2) can be used for slave communications and their area and
size can be accessed in the table.
The OUT 1 and IN 1 areas and sizes are valid even if a Configurator is not
being used.
Word
m+31

Bit 08 Bit 07
Reserved by system

Bit 00
Slave OUT 1 area

m+32

First word in the slave OUT 1 area

m+33

OUT 1 area size (bytes)

m+34

Reserved by system

Slave IN 1 area

m+35

First word in slave IN 1

m+36

IN 1 area size (bytes)

m+37

Reserved by system

Slave OUT 2 area (Always 0)

m+38

First word in the slave OUT 2 area (Always 0)

m+39

OUT 2 area size (bytes) (Always 0)

m+40

Bit 15

Reserved by system

Slave IN 2 area

m+41

First word in slave IN 2

m+42

IN 2 area size (bytes)

Section 3-3

Allocated DM Area Words
Note OUT2 is not used.
Ranges
Name

Range

OUT 1/2 area

Details

See Areas and Word
First word in the OUT block Ranges.
1/2

Shows the area.

OUT 1/2 area size

00 to C8 Hex
(0 to 200 bytes)

Shows the area by size in
bytes.

IN 1/2 area

See Areas and Word
Ranges.

Shows the area.

00 to C8 Hex
(0 to 200 bytes)

Shows the block size in
bytes.

First word in the IN
blocks1/2
IN 1/2 area size

Shows the first word for the
area.

Areas and Word Ranges
Code

3-3-8

Name

Word range

00 Hex

---

The block is not used.

01 Hex

CIO Area (CIO)

0000 to 17FF Hex (0 to 6143)

03 Hex

Data Memory (DM)

0000 to 7FFF Hex (0 to 32767)

04 Hex

Work Area (WR)

0000 to 01FF Hex (0 to 511)

05 Hex

Holding Relay (HR)

0000 to 01FF Hex (0 to 511)

08 to 14 Hex

Expansion Data Memory (EM)
Bank 0 to bank C (13 banks)

0000 to 7FFF Hex (0 to 32767) for
all banks

Slave Detailed Status
The status of the slaves controlled by the master function of the Unit is provided by node address. Each word provides the status of two slaves.
Word

Bit 15

00, 08

01, 09

02, 10

Bit 00

m+37

Detailed slave status at node address 1

Detailed slave status at node address 0

m+38

Detailed slave status at node address 3

Detailed slave status at node address 2

to
m+68

Bit

Bit 08 Bit 07

Name
Slave Error
Flags

Slave Verification Error
Flags
Slave Configuration
Error Flags

:
Detailed slave status at node address 63

Status

Controlled
by

Detailed slave status at node address 62

Unit operation

Unit

Indicates that a remote I/O communications error has occurred with
the slave. More specifically, this bit turns ON when at least one of
the following errors occurs:
• Verification Error Flag (word n+12 bit 00)
• Structure Error Flag (word n+12 bit 01)
• Remote I/O Communications Error Flag (word n+12 bit 02)

OFF

Unit

Indicates that an error has not occurred or turns OFF when the error
has been cleared.

Unit

Indicates that the data for the slave registered in the scan list is different from the actual Slave. It occurs with the scan list enabled.

OFF

Unit

Indicates that a verification error has not occurred or turns OFF
when a verification error is cleared.

Unit

Indicates that an error that disables I/O allocations has occurred at
the Slave (with the scan list disabled).

OFF

Unit

Indicates that a structure error has not occurred or turns OFF when
the structure error is cleared.

Section 3-3

Allocated DM Area Words
Bit
03, 11

Name

Status

ON
Slave
Remote I/O
Communications Error
Flag

Indicates that an error has occurred in remote I/O communications
with the Slave.
This bit turns ON if a timeout occurs in at least one connection with
multiple connections set.
This error occurs with the scan list enabled or disabled.

Unit

Indicates that a remote I/O communications error has not occurred
or turns OFF when a remote I/O communications error is cleared.

---

Unit

Indicates that COS sent to a slave destination failed.
Use the Master COS Send Switch (n+2/n+3/n+4/n+5 words) to send
COS.
The following may be cause failure of COS signal transmission.
• Remote I/O communications stopped
• A COS connection was not established
• Bus OFF has occurred.
• A network power error has occurred.
• A send timeout has occurred.
Once this bit turns ON, it will remain ON until the operation is successfully completed.

OFF

Unit

Indicates that the error has not occurred. The bit turns OFF when
COS is successfully sent.

Unit

Indicates that the slave is registered in the scan list.

OFF

Unit

The Unit is operating with the scan list disabled or the Unit is not registered in the scan list.

Unit

Indicates that normal remote I/O communications were conducted
with the slaves at all set connections.
This bit turns OFF if a timeout occurs in at least one connection with
multiple connections set.

Unit

Indicates that remote I/O communications failed (no slave present,
no scan list registered, verification error, structure error) or that a
communications error is occurring.

04, 12

Reserved by --system

05, 13

Master COS
Send Failure Flag

07, 15

Scan List
Registration
Flag

Remote I/O ON
Communications Flag
OFF

Unit operation

Unit

OFF

06, 14

Controlled
by

SECTION 4
Remote I/O Master Communications
This section describes the remote I/O communications performed as a DeviceNet master by the Devicenet Unit.
4-1

Master Remote I/O Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1-1

Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1-2

Remote I/O Master Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1-3

Precautions on the Number of Master Units. . . . . . . . . . . . . . . . . . .

4-1-4

Procedure for Using Remote I/O Master . . . . . . . . . . . . . . . . . . . . .

4-2

Scan List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3

Fixed Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

101

4-3-1

Allocated Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

101

4-3-2

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

102

4-3-3

Changing System Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

105

4-3-4

Fixed Allocations Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

105

4-4

User-set Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

107

4-5

Starting and Stopping Remote I/O Communications . . . . . . . . . . . . . . . . . . .

116

4-5-1

Starting Remote I/O Communications . . . . . . . . . . . . . . . . . . . . . . .

116

4-5-2

Stopping Remote I/O Communications . . . . . . . . . . . . . . . . . . . . . .

116

4-5-3

Restarting Remote I/O Communications . . . . . . . . . . . . . . . . . . . . .

116

4-6

Example of Ladder Programming for Remote I/O Communications . . . . . . .

116

4-7

Errors that May Occur in Remote I/O Communications . . . . . . . . . . . . . . . .

118

Section 4-1

Master Remote I/O Communications

4-1

Master Remote I/O Communications
Remote I/O communications are used to automatically transfer data between
slaves and the CPU Unit without any special programming in the CPU Unit
under which the Master Unit is mounted.

Master Communications
CS/CJ-series DeviceNet Unit (master)
CS/CJ-series CPU Unit

Remote I/O communications
DeviceNet

Slaves

Note

1. A CS/CJ-series DeviceNet Unit can function as either a master or slave in
remote I/O communications and it can even function as both a master and
a slave at the same time. Turn ON the Master Enable Switch (word n, bit
06) in the Software Switches in the words allocated in the CIO Area to set
the CS/CJ-series DeviceNet Unit to function as a master. Once this switch
is turned ON and master communications are enabled, the Unit will continue to perform master communications regardless of whether the power is
turned OFF and back ON again. Turn ON the Master Stop Switch (word n,
bit 07) to stop master communications. Master communications are the focus of this section.
2. In the following descriptions, a CS/CJ-series DeviceNet Unit set to function
as a master is referred to as a “Master Unit” and a CS/CJ-series DeviceNet
Unit set to function as a slave is referred to as a “Slave Unit”.

4-1-1

Allocations
All slaves are allocated words in the I/O memory of the CPU Unit to which the
Master Unit is mounted. They are allocated using one of the following methods:
1) Fixed allocations
2) User-set allocations

Section 4-1

Master Remote I/O Communications
Fixed Allocations

Any one of the three areas below can be specified as the words allocated in
the CIO Area for fixed allocations. The output (OUT) block and the input (IN)
block are allocated strictly in order of node addresses in one of the areas
shown below.
CS/CJ Series
OUT
block 1

CIO 3200
CIO 3201
CIO 3262
CIO 3263

IN
block 1

CIO 3300
CIO 3301
CIO 0362
CIO 0363
CIO 3400

OUT
block 2

CIO 3401
CIO 3462
CIO 3463

Select one.

CIO 3500

IN
block 2

CIO 3501
CIO 3562
CIO 3563
CIO 3600
CIO 3601

OUT
block 3

CIO 3662
CIO 3663
CIO 3700

IN
block 3

CIO 3701
CIO 3762
CIO 3763

Address 0
Address 1
Address 62
Address 63

To Slaves

Address 0
Address 1
Address 62
Address 63

From Slaves

Address 0
Address 1
Address 62
Address 63
Address 0
Address 1

To Slaves

From Slaves

Address 62
Address 63
Address 0
Address 1

To Slaves

Address 62
Address 63
Address 0
Address 1

From Slaves

Address 62
Address 63

Words are allocated to slaves starting from address 0 in the output (OUT) and
IN blocks. Each address is allocated at least one byte (rightmost).
• More than one word is allocated for each slave (according to its node
address) with more than16 I/O points.
• The rightmost byte of the word is allocated to each slave that has less
than 16 I/O points.

User-set Allocations
The following methods are used for user-set allocations:
• Using a Master User Allocations Table (allocated DM Area words)
• Using the Configurator
Using the Master User
Allocations Table

In the Master User Allocations Table, set the areas and first words for the output block (OUT 1) and the input block (IN 1) and set the area and first word for
the Allocation Size Setup Table. In the Allocation Size Setup Table, set the
allocation sizes for the slave input and output blocks. Each slave can be allocated two blocks, OUT 1 and IN 1, according to the settings in these tables.

Section 4-1

Master Remote I/O Communications

The OUT and IN blocks will be allocated in order of slave node addresses.
Each block is a maximum of 500 words.
CPU Unit
Specified in allocated DM words
Ascending order starting from address 0
Address
OUT
block 1

To Slaves
Address

IN
block 1

Ascending order starting from address 0
Address
From Slaves
Address

Each address is allocated at least one byte (rightmost).
• More than one word is allocated for each slave with more than16 I/O
points (according to its node address).
• The rightmost byte of the word is allocated to each slave that has less
than 16 I/O points.
Using the Configurator

When using the Configurator, each slave can be allocated four blocks: Output
(OUT) blocks 1 and 2 and input blocks 1 and 2. Each block is a maximum of
500 words.
The position of each block can be set. An order (such as IN block 1, OUT block 2, IN block
2 and OUT block 1) can also be used.
CPU Unit
Output area
OUT
block 1

OUT
block 2

Address

Any address order
To Slaves

Address
Address

Any address order
To Slaves

Address
Input area
IN
block 1

IN
block 2

Address
Address
Address

Any address order
From Slaves
Any address order
From Slaves

Address

Any order can be used for block allocations and for slave allocations within
each block. Each address is allocated at least one byte (rightmost).
• More than one word is allocated for each slave with more than16 I/O
points (using it’s node address).
• The leftmost or rightmost byte of the word is allocated to each slave that
has less than 16 I/O points.

Section 4-1

Master Remote I/O Communications

4-1-2

Remote I/O Master Specifications

Item
Slave allocation methods

Specifications
Fixed allocations

Select one of the following fixed allocation areas using the Fixed Allocated Area Switches 1,
2, and 3 in the software switches in the allocated CIO Area words.
Allocated
words (CIO
Area)

I/O

Size

Fixed Alloca- Fixed Alloca- Fixed Allocation Area Set- tion Area Set- tion Area Setting 1
ting 2
ting 3

Output
(OUT) area

64 words

3200 to 3263

3400 to 3463

3600 to 3663

Input (IN)
area

64 words

3300 to 3363

3500 to 3563

3700 to 3763

Select one of the above areas using the software switches. All are fixed at 1
word per node address. The default setting is Fixed Allocation Area Setting
1.
User-set
allocations

By allocated Set the areas and the first words for the OUT 1 and IN 1 blocks in the scan
DM Area
list Setup Table in the allocated DM Area words. Set the allocation size for
words
each slave using the allocation size Setup Table (any words). Allocations
must be in the order of node addresses.
Allocated
words

By Configurator

Fixed allocations
User-set
allocations

Output (OUT)
area

500 words max. × 1 block

Input (IN)
area

500 words max. × 1 block

Set the areas for the OUT 1/2 and IN 1/2 blocks, the first words, and the allocation sizes for all slaves using the Configurator. Blocks can be set for nodes
in any order.
Allocated
words

No. of Masters that can
be mounted

The input and output areas can be the following sizes starting
from any word in any of the following areas: CIO Area, WR
Area, HR Area, DM, Area, or EM Area.

The input and output areas can be the following sizes starting
from any word in any of the following areas: CIO Area, WR
Area, HR Area, DM, Area, or EM Area.
Output (OUT)
area

500 words max. × 2 blocks

Input (IN)
area

500 words max. × 2 blocks

3 Units max. (Unique words must be allocated using the Allocated CIO Area
Words Software Switches.)

By allocated 16 Units max. (Unique words must be allocated using the user Setup Table in
the allocated DM Area words.)
DM Area
words
By Configurator

16 Units max. (Unique words must be allocated using the Configurator.)

Fixed allocations
63 nodes
Max. No. of
slaves conUser-set
By allocated
nected per
allocations DM Area
DeviceNet Unit
words
By Configurator
2,048 pts (64 input words, 64 output words)
Max. No. of I/O Fixed allocations
points per
User-set
By allocated 16,000 pts (500 input words x 1 block, 500 output words x 1 block)
DeviceNet Unit allocations DM Area
words
By Configurator

32,000 pts (500 input words x 2 blocks, 500 output words x 2 blocks)

Section 4-1

Master Remote I/O Communications
Item

Specifications

2,048 pts (64 input words, 64 output words)
Max. No. of I/O Fixed allocations
per Slave con- User-set
By allocated 3,200 pts (100 input words, 100 output words)
trollable by a
allocations DM Area
DeviceNet Unit
words
By Configurator

4-1-3

3,200 pts (100 input words, 100 output words)

Precautions on the Number of Master Units
The following system configurations can be constructed based on various
numbers of Master Units when DeviceNet Units are used.

Pattern

One Master Unit
connected on a single
network

Configuration

Multiple Master Units connected Multiple Master Units connected
on a single network
to a single PC

Yes
A

Remote I/O communications
❍

❍ (Up to 3 Master Units can be
used.)

By DM
Area
words

❍

❍ (See note.)

❍

By
Configurator

❍

❍ (See note.)

❍

Fixed allocations
Userset
allocations

Precautions

Same as previous networks.

• The communications cycle time • The cycle time of the PC is longer.
is longer.
Note The communications cycle • Make sure that each word allocated in the system is allocated
time for the network in the
to only one Master Unit.
figure above is TA+TB if
sections A and B above are
separate networks with a
communications cycle time
of TA and TB.
• Multiple Master Units cannot
share a single Slave Unit.
• Bus Off errors (communications
stopped by multiple transmissions) may occur if multiple
Master Units with disabled scan
lists are present on a single network.

Note Only one Master Unit can be connected to a network if the user specifies a
COS or cyclic connection from the Configurator. Remote I/O communications
errors may occur is more than one Master Unit is connected for a COS or
cyclic connection.

Master Remote I/O Communications

4-1-4

Section 4-1

Procedure for Using Remote I/O Master

Fixed Allocations for Remote I/O
1,2,3...

1. Turn ON the communications, slave, and PC power supplies.
Note Turn ON the communications power supply prior to turning ON the
slave power supply or the slaves may not go online.
2. Switch the CPU Unit to PROGRAM mode.
3. Turn ON the Master Enable Switch (word n, bit 06). (The master will remain
enabled even if the power is turned OFF and back ON again.)
Note Execute this only when master communications are turned OFF. (If
the Master Enable Switch is turned ON when master communications are enabled, a Unit error will occur and a C2 error will be displayed on the 7-segment display on the front panel.)
4. Perform the following steps to start with the scan list disabled.
Skip to step 5. to re-register and enable the scan list.
Skip to step 6. to start with the scan list enabled without any changes to
the fixed allocations or scan list.
Note The mode can be confirmed from the dots on the 7-segment display
on the Master Unit.
Left dot not lit: Scan list enabled
Left dot flashing: Scan list disabled
a) Turn ON a Master Fixed Allocation Setting Switch (word n, bits 08 to
10).
b) Monitor and check the registered slave data area to see if communications are possible with registered slaves.
c) Turn ON the Scan List Enable Switch (word n bit 00) from a Programming Device.
d) Go to step 6.
5. Perform the following steps to re-register the scan list when starting with
the scan list enabled.
a) Turn ON the Scan List Clear Switch (word n, bit 01) from a Programming Device.
b) Turn ON a Master Fixed Allocation Setting Switch (word n, bits 08 to
10).
c) Monitor and check the registered slave data area to see if communications are possible with registered slaves.
d) Turn ON the Scan List Enable Switch (word n, bit 00) from a Programming Device.
6. Start master remote I/O communications with the scan list enabled. Use
the software switches to start or stop communications.
7. Check to see if both the MS and NS indicators are lit green on the master
and all slaves.
8. Switch the CPU Unit to RUN mode.

User-set Remote I/O Allocations Using DM Area Settings
1,2,3...

Master Remote I/O Communications

Section 4-1

3. Turn ON the Master Enable Switch (word n bit 06). (The master will remain
enabled even if the power is turned OFF and back ON again.)
Note Execute this only when master communications are turned OFF. (If
the Master Enable Switch is turned ON when master communications are enabled, a Unit error will occur and a C2 error will be displayed on the 7-segment display on the front panel.)
4. Set data in the Master User Allocation Setup Table (words m+1 to m+6)
and the Allocation Size Setup Table in the DM Area words allocated to the
Unit from the PC Programming Device.
5. Turn ON the Master User-set Allocations Switch (word n, bit 11).
6. Start master remote I/O communications with the scan list enabled. Use
the software switches to start or stop communications.
7. Check to see if both the MS and NS indicators are lit green on the master
and all slaves.
Note The mode can be confirmed from the dots on the 7-segment display
on the Master Unit.
Left dot not lit: Scan list enabled
Left dot flashing: Scan list disabled
8. Switch the CPU Unit to RUN mode.
User-set Remote I/O Allocations Using the Configurator
1,2,3...

1. Connect the Configurator to the network through a serial line or dedicated
Board/Card.
2. Turn ON the communications, slave, and PC power supplies.
Note Turn ON the communications power supply prior to turning ON the
slave power supply or the slaves may not go online.
3. Switch the CPU Unit to PROGRAM mode.
4. Perform the following steps to allocate areas, create scan lists, and download the settings to the nodes.
a) Create a network configuration offline on the Configurator.
b) Enable master communications in the CS1W-DRM21 properties.
c) Create master device parameters.
d) Save the data as a network component file.
Note If desired, you can also go directly online and download the network
component file to the network devices without saving the file.
e) Read the network component file, go online, and download the file to
the network devices.
5. Start master remote I/O communications with the scan list enabled. Use
the software switches to start or stop communications.
6. Check to see if both the MS and NS indicators are lit green on the Master
Unit and all Slave Units.
Note The mode can be confirmed from the dots on the 7-segment display
on the Master Unit.
Left dot not lit: Scan list enabled
Left dot flashing: Scan list disabled
7. Read the network components using the Configurator.
8. Save the components as a network component file using the Configurator.
9. Switch the CPU Unit to RUN mode.

Note

1. Remote I/O communications with a specified slave can be stopped to effectively disconnect the slave from the network by turning ON the Discon-

Section 4-2

Scan List

nect/Connect Switch for that slave (words n+6 to n+9). This can be done
when a slave is replaced or to register a slave in the scan list in preparations to connect it to the network at a later time. The Disconnect/Connect
Switches, however, are cleared when the power supply is turned OFF, so
the bit must be turned back ON from the ladder program after the power
turns ON in order for it to remain effective.
2. Use Configurator Ver. 2.10 or later for the CJ1W-DRM21.

4-2

Scan List
A scan list is used to register the slaves with which the Master Unit communicates in DeviceNet remote I/O communications. It is the basis on which the
Master Unit communicates with slaves.
The Master Unit does not contain a scan list by default. The CS/CJ-series
DeviceNet Unit, however, has a default setting that allows it to communicate
with all slaves even with the scan list disabled, but this operating mode should
not be used for normal operation. Always create a scan list prior to operating
the Unit.

Scan List Contents

The contents of the scan list is listed in the following table. When a Master
Unit goes online, it compares each of these items with the slaves that are
actually connected to the network. The items that are compared, however, will
depend on the allocation method that is used.

Item

Description

Fixed allocations

User-set allocations
using allocated DM
Area words

User-set allocations
from the
Configurator

Node address

Node address for
every Slave

Compared

Allocated IN/OUT
sizes and allocation

Compared
Settings of the number of bytes allocated
to every slave in a data
area of the Master Unit

Compared

Vendor

Unique manufacturer
ID

Not compared

Set from Configurator

Device type

Unique product type
value

Not compared

Set from Configurator

Product code

Unique product model
value

Not compared

Set from Configurator

Connection type

Applicable DeviceNet
protocol
(See Appendix B
DeviceNet Connections for details.)

Automatically set

Automatically set or
set from Configurator

Connection path

Type of slave I/O data
(See Appendix B
DeviceNet Connections for details.)

Cannot be set

Set from Configurator

Section 4-2

Scan List
Creating the Scan List

The way that a scan list is prepared varies with the allocation method as
shown below.
Fixed allocations

With the CPU Unit in PROGRAM mode:
1. Turn ON the one of the
Master Fixed Allocation
Setting 1 Switches (1 to
3).
2. Turn ON the Scan List
Enable Switch.

Note

User-set allocations
User-set allocations
through the allocated DM through the Configurator
Area words area
With the CPU Unit in PROGRAM mode, turn ON the
Master User Allocations
Setup Switch.

Create a list from the Configurator. (Acquire a list of
online devices, use it to
create a scan list, and then
register the scan list in the
Master Unit.)

1. Be sure to create a scan list before starting actual system operation.
2. It is still possible to communicate with Units (with the scan list disabled) if
a scan list is not created when fixed allocations areas 1 to 3 are used. This
may result in faulty operation because the Master Unit will communicate
with slaves even if they do not start up due to problems, such as equipment
failure if there is no a scan list.

Scan List Enabled and Scan List Disabled
The scan list must be made. The scan list modes are described here.
Scan List Enabled (Used
for Actual Operation)

Remote I/O communications are performed according to the registered scan
list and only with slaves that are on the list. A verification error occurs (word
n+12, bit 00 in the status area turns ON) if a slave registered on the scan list is
not present on the network, if a slave did not start up when remote I/O communications started, or if the number of I/O points did not match the number
registered.

Scan List Disabled (Used
when Changing System
Components)

Remote I/O communications can be performed with fixed allocations instead
of a scan list in order to change a system component. Do not operate without
a scan list during actual system operation. Use this mode only to replace a
Master Unit or to change a system component (change a connected slave or
a node address).
Note a) To disable the scan list, turn ON the Scan List Clear Switch (word
n, bit 01) during remote I/O communications with the scan list enabled (with fixed allocations, user-set allocations using allocated
DM Area words, or user-set allocations using the Configurator). In
all these cases, remote I/O communications are executed using
the fixed allocations area that was last used when the list was disabled. All slaves are targeted for remote I/O communications with
the scan list disabled.
b) Slaves that are connected to the network while communications
are in progress are also targeted for communications. Errors cannot be confirmed, however, even if there are slaves present that
did start up due to problems such as equipment failure because
there is no scan list available to check communications against.
The communications cycle time will also be significantly longer
than the calculated value.
c) The scan list is automatically enabled when user-set allocations
are set using the allocated DM Area words or the Configurator. If
the list is subsequently cleared using a software switch, fixed allocations (1 to 3) will be used for remote I/O communications when
the scan list is disabled. Make sure the system has stopped before

100

Section 4-3

Fixed Allocations

you disable the scan list with a Master Unit that is set for user-set
allocations. Particularly when multiple Master Units are connected
to a single network, communications will not be performed successfully if even one Master Unit on the network is operating with
the scan list disabled. Once the list is disabled, the user-set allocations data registered in the Master Unit is lost.

Backing Up the Scan List
A scan list must be created to switch the DeviceNet Unit to operation with the
scan list disabled or to replace a DeviceNet Unit. It is important to back up the
list using one of the following methods:
Fixed Allocations or Userset Allocations in
Allocated DM Area Words

Save the scan list as a backup file on Memory Card by turning ON the Setup
File Backup Switch (word n+1, bit 15) in the words allocated in the CIO Area.

User-set Allocations from
the Configurator

Save the scan list as a backup file on Memory Card or save it either as a network component file and master parameter file using the Configurator. In the
preceding cases, turn ON the Setup File Restore Switch (word n+1, bit 14) in
the words allocated in the CIO Area to input setup data, such as the scan list
backed up on Memory Card, into a DeviceNet Unit.

4-3

Fixed Allocations

4-3-1

Allocated Words
Words in the CS/CJ-series DeviceNet CIO Area in the CPU Unit are allocated.
An area of words can be selected from one of three fixed allocation areas.
Use a Software Switch to select the allocation area.
Each area is comprised of an OUT area that is used to write output data to
slaves and an IN area that is used for input from slaves in remote I/O communications.
OUT area (word)

IN area (word)

Selection method

Fixed allocation area 1

Area

CIO 3200 to CIO 3263

CIO 3300 to CIO 3363

Turn ON the Master Fixed Allocation Setting
1 Switch (word n, bit 08).

Fixed allocation area 2

CIO 3400 to CIO 3463

CIO 3500 to CIO 3563

Turn ON the Master Fixed Allocation Setting
2 Switch (word n, bit 09).

Fixed allocation area 3

CIO 3600 to CIO 3663

CIO 3700 to CIO 3763

Turn ON the Master Fixed Allocation Setting
3 Switch (word n, bit 10).

A maximum of 3 DeviceNet Units can be included as masters in a single PC
because the three allocation areas above are set individually for fixed allocations. The default setting is fixed allocations area 1.
Each OUT/IN area is allocated to a slave according to its node address as
shown below. Allocated words are determined by the node address in fixed
allocations as shown.
Area 3

Area 2

Area 1

CIO 3600
CIO 3601
CIO 3602

CIO 3400
CIO 3401
CIO 3402

CIO 3661
CIO 3662
CIO 3663

CIO 3461
CIO 3462
CIO 3463

Node
address

Area 1

Area 2

CIO 3200
CIO 3201
CIO 3202

CIO 3300
CIO 3301
CIO 3302

CIO 3500
CIO 3501
CIO 3502

CIO 3700
CIO 3701
CIO 3702

CIO 3261
CIO 3262
CIO 3263

CIO 3361
CIO 3362
CIO 3363

CIO 3561
CIO 3562
CIO 3563

CIO 3761
CIO 3762
CIO 3763

OUT area

IN area

Area 3

101

Section 4-3

Fixed Allocations

Note More than one Master Unit can be included in a single PC with fixed allocations, as shown below (3 Units max.).
Master Unit
Master Unit

Slave
Slave

4-3-2

Procedure

Step 1: Place the CPU Unit in PROGRAM mode.
Step 2: Turn ON the
If the master communications have been disabled (if Master Function Enable
Master Enable Switch
Flag (word n+11, bit 03) is OFF), turn ON the Master Enable Switch (word n,
bit 06) to enable master communications. Once Master communications have
been enabled by turning this switch ON, it will not change even if the power is
turned OFF and back ON again.
Note If the master communications are enabled (if Master Function Enable
Flag (word n+11, bit 03) is ON), skip this step and go onto the next
step. (If the Master Enable Switch is turned ON when master communications are enabled, a Unit error will occur and a C2 error will be
displayed on the 7-segment display on the front panel.)
Step 3: Turn ON the Scan
List Clear Switch

If the Unit is in the Scan List Enable mode (if Scan List Disabled Flag (word
n+11, bit 04) is OFF), turn ON the Scan List Clear Switch (word n, bit 01) to
change to the Scan List Disable mode.
Note If the Unit is already in the Scan List Disable mode (if the Scan List
Disabled Flag (word n+11, bit 04) is ON), skip this step and go onto
the next step. (If the Scan List Clear Switch is turned ON when the
Unit is in the Scan List Disable mode, a Unit error will occur and a C2
error will be displayed on the 7-segment display on the front panel.)

Step 4: Select Fixed
Allocations Area 1 to 3

Turn ON the Master Fixed Allocation Setting 1 to 3 Switch (word n, bits 08 to
10) in the Software Switches in the words allocated in the CIO Area to select
the fixed allocations area from1 to 3. One word will be allocated per node
address in order of node addresses for the output (OUT) block and one word
for the input (IN) block in the CS/CJ-series DeviceNet CIO Area.
First word n = CIO 1500 + (25 x unit number)

Software Switch
address

Fixed allocations
area number

Allocated
OUT area

Allocated
IN area

Word n, bit 08

Master Fixed Allocation
Setting 1 Switch

Fixed allocations area CIO 3200 to
1
CIO 3263

CIO 3300 to
CIO 3363

Word n, bit 09

Master Fixed Allocation
Setting 2 Switch

Fixed allocations area CIO 3400 to
2
CIO 3463

CIO 3500 to
CIO 3563

Word n, bit 10

Master Fixed Allocation
Setting 3 Switch

Fixed allocations area CIO 3600 to
3
CIO 3663

CIO 3700 to
CIO 3763

Step 5: Turn ON the Scan
List Enable Switch

102

Software Switch name

Remote I/O communications will start with the scan list disabled after a fixed
allocations area has been selected. Check to see if communication is proceeding normally with each slave, and then turn ON the Scan List Enable
Switch (word n, bit 00) to communicate with the scan list enabled.

Section 4-3

Fixed Allocations
Fixed Allocations Area 1

OUT blocks are allocated to slaves from CIO 3200 to CIO 3263 and IN blocks
are allocated to slaves from CIO 3300 to CIO 3363.

CS/CJ-series DeviceNet CIO Area
Bit
CIO 3200

OUT block
Bit
Address 0
CIO 3200
Address 1
CIO 3201
Address 2
CIO 3202
to

OUT block

CIO 3260
CIO 3261
CIO 3262
CIO 3263

CIO 3263

Output to Slaves

Address 60
Address 61
Address 62
Address 63

IN block
Bit
CIO 3300
CIO 3301
CIO 3302

Bit
CIO 3300
to

IN block

to
CIO 3363

CIO 3360
CIO 3361
CIO 3362
CIO 3363

Address 0
Address 1
Address 2
to

Input from Slaves

Address 60
Address 61
Address 62
Address 63

Fixed Allocations Area 2
OUT blocks are allocated to slaves from CIO 3400 to CIO 3463 and IN blocks
are allocated to slaves from CIO 3500 to CIO 3563.
OUT block
CS/CJ-series DeviceNet CIO Area
Bit
CIO 3400
to

OUT block

CIO 3463

Bit
CIO 3400
CIO 3401
CIO 3402

Address 0
Address 1
Address 2

CIO 3460
CIO 3461
CIO 3462
CIO 3463

Output to Slaves

Address 60
Address 61
Address 62
Address 63

IN block
Bit
CIO 3500
to

IN block

CIO 3500
CIO 3501
CIO 3502
to

CIO 3563

CIO 3560
CIO 3561
CIO 3562
CIO 3563

Address 0
Address 1
Address 2
to

Input from Slaves

Address 60
Address 61
Address 62
Address 63

103

Section 4-3

Fixed Allocations
Fixed Allocations Area 3

OUT blocks are allocated to slaves from CIO 3600 to CIO 3663 and IN blocks
are allocated to slaves from CIO 3700 to CIO 3763.
OUT block
CS/CJ-series DeviceNet CIO Area
Bit
CIO 3600
to

OUT block

Bit
CIO 3600
CIO 3601
CIO 3602

Address 0
Address 1
Address 2

CIO 3660
CIO 3661
CIO 3662
CIO 3663

CIO 3663

Output to Slaves

Address 60
Address 61
Address 62
Address 63

IN block
Bit
CIO 3700
to

CIO 3700
CIO 3701
CIO 3702

IN block

to
CIO 3763

Address 0
Address 1
Address 2

CIO 3760
CIO 3761
CIO 3762
CIO 3763

Input from Slaves

Address 60
Address 61
Address 62
Address 63

The Slave allocation order is fixed in the output (OUT) and IN blocks starting
from address 0. Each address is allocated at least one byte (rightmost).
• More than one word is allocated for each slave (according to it’s node
address) with more than16 I/O points.
• The rightmost byte of the word is allocated to each slave that has less
than 16 I/O points.
Note The table below shows how fixed allocations areas differ between the
C200HW-DM21-V1 DeviceNet Master Unit of the C200H-series, and the
CS1W-DRM21 DeviceNet Unit of the CS/CJ-series and CJ1W-DRM21
DeviceNet Unit of the CJ-series.
Item
Fixed allocations
area

104

C200HW-DRM21-V1

CS1W-DRM21/CJ1W-DRM21

C200 DeviceNet CIO Area

CS/CJ-series DeviceNet CIO
Area

Output
area

CIO 0050 to CIO 0099

CIO 3200 to CIO 3263
CIO 3400 to CIO 3463
CIO 3600 to CIO 3663

Input area

CIO 0350 to CIO 0399

CIO 3300 to CIO 3363
CIO 3500 to CIO 3563
CIO 3700 to CIO 3763

Section 4-3

Fixed Allocations

4-3-3

Changing System Components
The scan list must be cleared in the following situations:
• Adding a slave
• Removing a slave
• Changing a node address
Turn OFF the Scan List Clear Switch (word n, bit 01) to clear the scan list.
Remote I/O communications will be performed with the scan list disabled
using fixed allocations in the fixed allocations area that was used the last time
the list was disabled. Make sure that communications with all slaves are operating properly after the scan list is cleared and the system component is
changed, and then turn ON the Scan List Enable Switch (word n, bit 00) again
to register all slaves currently online in the scan list. Remote I/O communications will continue during this time with the scan list enabled.

4-3-4

Fixed Allocations Example
This example shows the allocations that are used when Fixed Allocations 1
are used for the following slaves.
Node address

Outputs

Inputs

Product

0 pts

8 pts

8-pt Transistor Input Terminal
(DRT1-ID08)

8 pts

0 pts

8-pt Transistor Output Terminal
(DRT1-OD08)

0 pts

16 pts

16-pt Transistor Input Terminal
(DRT1-ID16)

16 pts

0 pts

16-pt Transistor Output Terminal (DRT1-OD16)

8 pts

8-pt Input and 8-pt Output Environment-resistant Terminal
(DRT1-MD16C)

16 pts

CQM I/O Link Terminal (CQM1DRT21)

32 pts

0 pts

C200 I/O Link Unit (C200HWDRM21) with 32 output pts (2
words)

0 pts

64 pts

Analog Input Terminal with 4
input pts (DRT1-AD04)

7
8
9
10
11

105

Section 4-3

Fixed Allocations
Resulting Slave Allocation
OUT area 1
Node address: Pts
0: 0 pts
1: 8 pts

CIO
Allocation disabled
Address 1

Address 3
Allocation disabled
Address 4

5: 16 pts

Address 5
Address 6
Address 6
Allocation disabled
Allocation disabled
Allocation disabled
Allocation disabled
Not used

6: 32 pts
7: None
8: 0 pts
9: None
10: None
11: None
12: None

IN area 1
Node address: Pts CIO
0: 8 pts
1: 0 pts
2: 16 pts
3: 0 pts
4: 8 pts
5: 16 pts
6: 0 pts
7: None
8: 64 pts
9: None
10: None
11: None
12: None
to
63: None

Allocation disabled for other slaves.
Address 3 allocated 1 word.
*2

Address 4 allocated 1 byte, leftmost byte allocation disabled.
Address 5 allocated 1 word.
Address 6 allocated 2 words.
Same as above.
Allocation disabled for other slaves. Address 8 of IN area already allocated.
Allocation disabled for other slaves. Address 8 of IN area already allocated.
Allocation disabled for other slaves. Address 8 of IN area already allocated.

Allocation disabled for other slaves. Address 8 of IN area already allocated.
Allocation disabled for other slaves. Address 8 of IN area already allocated.

to
Not used

63: None

Allocation disabled for other slaves. Address 0 of IN area already allocated.
Address 1 allocated 1 byte, leftmost byte allocation disabled.

Allocation disabled

2: 0 pts
3: 16 pts
4: 8 pts

Allocation disabled

Allocation disabled for other slaves. Address 8 of IN area already allocated.

*1 Can be used as an internal work word.
* 2 Cannot be used as an internal work word.
Address 0
Allocation disabled
Address 2
Allocation disabled
Allocation disabled
Address 4
Address 5
Allocation disabled
Allocation disabled
Address 8
Address 8
Address 8
Address 8
Not used
to
Not used
Allocation disabled

*2 Address 0 allocated 1 byte, leftmost byte allocation disabled.
*1 Allocation disabled for other slaves. Address 1 of OUT area already allocated.
*2

Address 2 allocated 1 word.

*1 Allocation disabled for other slaves. Address 3 of OUT area already allocated.
*2

Address 4 allocated 1 byte, leftmost byte allocation disabled.
Address 5 allocated 1 word.

Allocation disabled for other slaves. Address 6 of OUT area already allocated.
Allocation disabled for other slaves. Address 6 of OUT area already allocated.
Address 8 allocated 4 words.
Same as above.

Same as above.
Same as above.
Allocation disabled for other slaves.

*1
Allocation disabled for other slaves.

*1 Can be used as an internal work word.
* 2 Cannot be used as an internal work word.

Turn ON the Scan List
Enable Switch

106

Turn ON the Scan List Enable Switch (word n, bit 00, CIO 150000 in this
example). This will create a scan list based on data for slaves that are actually
online and will start remote I/O communications with the scan list enabled.

Section 4-4

User-set Allocations

4-4

User-set Allocations
With a CS/CJ-series DeviceNet Unit, remote I/O communications slaves can
be allocated in any area (CIO, WR, HR, DM, or EM) using one of the following
methods.
• Setting through the allocated DM Area words (Master User Allocations
Table)
• Setting through the Configurator

User-set Allocations Methods
Method

Set through the allocated DM Area
words (Master User Allocations Table)

Set through the Configurator

Allocation areas

CIO: 0000 to 6143
WR: W000 to W511
HR: HR000 to HR511
DM: D00000 to D32767
EM: E00000 to E32767 (Banks 0 to C)

No. of allocated blocks

2 blocks: OUT 1 and IN 1
4 blocks: OUT 1, IN 1, OUT 2 and IN 2
OUT 1 and IN 1 can be created anywhere OUT 1, IN 1, OUT 2, and IN 2 can be crein the above areas.
ated anywhere in the above areas.

Block allocation order

Any order

Node address order

Allocations must be in order of node
Any order
addresses (0 to 63 in ascending order)
Note 1.
Note 1. Not all nodes need to be allocated, reducing the number of
2.
words required.
2. Node addresses do not have
to correspond between blocks.

Start bit for allocations

Allocation size
Slave allocation
limits

All allocations start from bit 00 (Cannot
start from bit 08. All allocations are in 1
word units.)

Node addresses do not have
to correspond between blocks.
One node address cannot be
allocated to different blocks.

Allocations can start from bit 00 or bit 08.
Allocations starting from bit 08 are in
1-byte units only.

Per block

500 words max.

Total size

1,000 words max. for a total of 2 blocks

Slaves with
more than 8
points

The leftmost byte (bits 07 to 15) cannot be used.

Slaves with 8
points

Allocated to the leftmost or rightmost bytes (not allocated a word)

Slaves with 16
points

Allocated one word

Slaves with
more than 16
points

Allocated multiple words (with an odd number of bytes, only the rightmost byte is allocated in the last word)

2,000 words max. for a total of 4 blocks

Note Functions will vary as shown below depending on whether allocations are set
through the allocated DM Area words (Master User Allocations Table) or
through the Configurator.
• Words are always allocated to slaves in order of ascending node addresses when allocations are set with the allocated DM Area words.
The order can be determined by the user when the Configurator is
used. (However, even when using the allocated DM Area words, nodes
do not have to be allocated words, reducing the number of words required.)
• Only two blocks (OUT 1 and IN 1) can be allocated when setting are
made with the allocated DM Area words area, but there are four blocks
(OUT 1/2 and IN 1/2) available with the Configurator.

107

Section 4-4

User-set Allocations

• The first bit for node allocations is always bit 00 when setting allocations with the allocated DM Area words, but can be either bit 00 or bit
08 with the Configurator. (Allocations for slaves with two bytes or more
cannot start at bit 08.
Setting through the Allocated DM Area Words (Master User Allocations Table)
All slaves are allocated words in order of node addresses in two blocks: OUT
block 1 and IN block 1.
Addresses are in ascending order.
Not all nodes need to be allocated
and addresses for nodes with no
allocations are skipped.

OUT areas
Area specified in I/O memory

Bit
First word specified

Bit
Address 0
First word
specified Node addresses
in ascending order
to

Output to Slaves

OUT block 1

Addresses are in ascending order.
Not all nodes need to be allocated
and addresses for nodes with no
allocations are skipped.

IN areas
Bit
First word specified

Bit
First word specified

Address 0
Node addresses
in ascending order

IN block 1
to

Input from Slaves

The block allocation order and block allocation areas can be set. Node
addresses in each block are allocated words in ascending order from 0 to 63.
Node addresses that are not allocated are skipped (not allocated words).
Each address is allocated at least one byte (rightmost byte, 1 word, or multiple
words).
• More than one word is allocated for each slave (according to it’s node
address) with more than16 I/O points.
• The rightmost byte of the word is allocated to each slave that has less
than 16 I/O points.
Note Multiple Master Units can be included in a single PC as shown below
using user-set allocations (16 Units max.).
Master Unit
Master Unit

Slave
Slave

108

Section 4-4

User-set Allocations
Procedure

Step 1: Turn ON the Master Enable Switch
Make sure that master communications have disabled by checking to see if
Master Enable Function Flag (word n+11, bit 03) is OFF and then turn ON the
Master Enable Switch (word n+14, bit 06) to enable master communications.
Once master communications have been enabled by turning this switch ON,
they will remain enabled even if the power is turned OFF and back ON again.
Note Do not turn ON the Master Enable Switch unless master communications are stopped. (If the Master Enable Switch is turned ON when
master communications are enabled, a Unit error will occur and a C5
error will be displayed on the 7-segment display on the front panel.)
Step 2: Setting the Master User Allocations Table
This table specifies the area and first word for each block and the area and
first word for the Allocation Size Setup Table.
• Master User Allocations Table
Bit 15
m+1 wd 0
m+2 wd

OUT block 1 area

Can be set anywhere past here.

IN block 1 area

First word of IN block 1

m+5 wd 0
m+6 wd

First word m = D30,000+(100 x unit no.)
00

First word of OUT block 1

m+3 wd 0
m+4 wd

08 07

Area for Allocation
Size Setup Table

First word of Allocation Size Setup Table

Can be set anywhere past here.

• Areas and Word Ranges for OUT Block 1, IN Block 1, and the Allocation Size Setup Table
Code

Name

Word range

00 Hex

---

The block is not used.

01 Hex

CIO Area (CIO)

0000 to 17FF Hex (0 to 6143)

03 Hex

Data Memory (DM)

0000 to 7FFF Hex (0 to 32767)

04 Hex

Work (WR)

0000 to 01FF Hex (0 to 511)

05 Hex

HR (HR)

0000 to 01FF Hex (0 to 511)

08 to 14 Hex

Expansion Data Memory (EM)
Bank 0 to bank C (13 banks)

0000 to 7FFF Hex (0 to 32767) for all
banks

Step 3: Setting the Allocation Size Setup Table
Specify the area and first word in this table at words m+5 and m+6. IN and
OUT sizes for all nodes are set here as shown in the table below. The setting
range for each node is 0 to 200 bytes (0 to 100 words), although actual size
depends on the allocated slaves. The maximum size per block is 500 words. If
the size set here is larger than 1 byte, the start bit for all slaves is bit 00 and
size is allocated in ascending node address order starting from the beginning
of the OUT 1 and IN 1 areas in word units. If the size is set at 0 bytes for a
node address, it is skipped the words are allocated to the next address.
• Allocation Size Setup Table

109

Section 4-4

User-set Allocations

l is the first word in the Allocation Size Setup Table and is specified at words m+5 and m+6
08 07
00
Bit 15
Node address 0 OUT size (bytes)
Node address 0 IN size (bytes)

I+0
I+1

Node address 1 IN size (bytes)

Node address 1 OUT size (bytes)

I+62 Node address 62 OUT size (bytes)

Node address 62 IN size (bytes)

I+63 Node address 63 OUT size (bytes)

Node address 63 IN size (bytes)

Step 4: Turn ON the Slave User Allocations Switch
Turn ON the Slave User allocations Switch (word n, bit 11). This will make the
DeviceNet Unit read allocation results data for the slaves above from the CPU
Unit and create a scan list based on data for slaves that are actually online
prior to starting remote I/O communications with the scan list enabled.
Note The Master User Allocations Switch not only reads slave allocation
data, but it also enables the scan list.
Master User Allocations Table in
the allocated DM Area words

Bit
m+1 wd

OUT block
Bit

OUT block 1
area

m+2 wd First word of OUT block 1
IN block 1
m+3 wd

Specify the first word.

First word
specified

Node address 0
Node address 1

area

m+4 wd
m+5 wd

First word of IN block 1
Size Setup Table
Area

m+6 wd First word of Size Setup Table

Specify the
size.

Allocation Size Setup Table
in allocated DM Area words

Set first word.

Bit
I wd
I+1 wd

Output to Slaves

Specify the
first word.

Address 0
OUT size

Address 0
IN size

Address 1
OUT size

Address 1
IN size

Address 63
OUT size

Address 63
IN size

Node address 63
IN block
Bit
First word
specified

Node address 0
Node address 1
Input from Slaves

to
I+63 wd

Node address 63
Specify the first word.

Note

1. Any order can be used for the OUT 1 and IN 1 blocks.
2. Node addresses do not have to correspond between output block 1 and input block 1.
Example: This is not necessary.
OUT block 1
Node address 01
Node address 02

IN block 1
Node address 01
Node address 02

Node address 03

3. The start bit for node addresses must always be bit 00, and never bit 08.

110

Section 4-4

User-set Allocations
4. Multiple masters cannot share the same slave.
Master

Master

Slave

5. Be sure to use user-set allocations and operate the Master Unit with the
scan list enabled if multiple masters are connected to a single network.
Communications will not be possible if there is more than one master with
the scan list disabled connected to a network.
Changing System Components
In the following situations, the table must be reset, the Master User Allocations Switch (word n, bit 11) turned ON, and the scan list recreated:
• Adding a slave
• Removing a slave
• Changing a node address
• Changing a node allocation
There is no need to clear the scan list.
Example Settings for User-set Allocations through Allocated DM Area Words
This example uses the following settings for unit number 0.
• OUT block 1 area and first word: WR (04 Hex), 50 (0032 Hex)
• IN block 1 area and first word: WR (04 Hex), 100 (0064 Hex)
• Allocation Size Setup Table area and first word: DM (03 Hex), 00100
(0064 Hex)
This example shows user-set allocations for the following slaves.
Node address

Outputs

Inputs

Product

16 pts

0 pts

16-pt Transistor Output Terminal (DRT1OD16)

8 pts

8-pt input and 8-pt Output Environmentresistant Terminal (DRT1-MD16C)

16 pts

CQM I/O Link Terminal (CQM1-DRT21)

0 pts

8 pts

8-pt Transistor Input Terminal (DRT1ID08)

None

160 pts

--160 pts

CS/CJ-series DeviceNet Unit (CS1WDRM21) (Slave Unit)

Master User Allocations Table
OUT block 1 area: WR (04 Hex)
First word of OUT block 1: 50 (0032 Hex)
IN block 1 area: WR (04 Hex)
First word of IN block 1: 100 (0064 Hex)
Area for the Allocation Size Setup Table: DM (03 Hex)
First word of the Allocation Size Setup Table: 00100 (0064 Hex)

111

Section 4-4

User-set Allocations
Allocation Size Setup Table
OUT sizes specified
in the leftmost byte

IN sizes specified in
the rightmost byte

Address 0 OUT: 2 (bytes)

Address 0 IN: 0 (bytes)

Address 1 OUT: 1 (bytes)
Address 2 OUT: 2 (bytes)

Address 1 IN: 1 (bytes)
Address 2 IN: 2 (bytes)

Address 3 OUT: 0 (bytes)
Address 4 OUT: 0 (bytes)
Address 5 OUT: 20 (bytes)

Address 3 IN: 1 (bytes)
Address 4 IN: 0 (bytes)
Address 5 IN: 20 (bytes)

Resulting Slave Allocations
OUT area 1
Address 0
Not used Address 1
Address 2
Address 5

Address 0 allocated two bytes (1 word).
Address 1 allocated 1 byte, leftmost byte is not used.
Address 2 allocated two bytes (1 word).
Address 5 allocated 20 bytes (10 words).

IN area 1
Not used Address 1
Address 2
Not used
Address 3
Address 5

Address 1 allocated 1 byte, leftmost byte is not used.
Address 2 allocated two bytes (1 word).
Address 3 allocated 1 byte, leftmost byte is not used.
Address 5 allocated 20 bytes (10 words).

Turning ON the Master User Allocations Switch
Turn ON the Master User Allocations Switch (word n, bit 11, CIO 150011 in
this example). The Master User Allocations Switch will read the allocation
results data for the above slaves and create a scan list based on data for
slaves that are actually online prior to starting remote I/O communications
with the scan list enabled.

112

Section 4-4

User-set Allocations
Setting through the
Configurator

Slaves can be allocated words in any order for the following blocks: OUT block
1, OUT block 2, IN block 1, and IN block 2.
OUT block 1

Specified area in I/O memory
User-set block order

Bit
First word
specified

Bit
First word specified
to

Address
Address
Address
to

OUT block 1

User-set block order

IN block 1
Bit
First word specified

Bit
First word specified

Output to slaves

Address
Address
Address
Address
User-set block order
Address
Address
Address

IN block 1

Input from slaves

Address
Address
Address
Address
OUT block 2
User-set block order
Bit
First word
specified

Bit
First word specified
to

Address
Address
Address

Output to slaves

OUT block 2

Address
Address
Address
Address
IN block 2

Bit
First word specified
to

User-set block order

Bit
First word specified

Address
Address
Address

IN block 2
to

Input from slaves

Address
Address
Address
Address

The block allocation order, block allocation areas, and order of node
addresses in each block can be set by the user, each address is allocated at
least one byte (rightmost or leftmost byte).
• More than one word is allocated for each slave (according to it’s node
address) with more than16 I/O points.
• The leftmost or rightmost byte of the word is allocated to each slave that
has less than 16 I/O points.

113

Section 4-4

User-set Allocations
Procedure
Step 1

Set the area, start word, and words allocated for each block using the Configurator.
Step 2
Allocate words to all node addresses in each block as shown below using the
Configurator.
OUT block 1
Node address 00

Node address 00: DRT1-OD16 (16 output pts)

Node address 03

Node address 03: DRT1-DA02 (2 analog output points = 32 bits)

IN block 1
Node address 01: DRT1-ID08 (8 input pts)
Node address 01

Node address 02

Node address 02: DRT1-ID08 (8 input pts)

• Each address is allocated at least one byte (rightmost or leftmost
byte).
Note a) The order of all blocks can be set as desired by the user.
OUT block 1

IN block 2

OUT block 2

IN block 1

b) Node addresses do not have to correspond between an output
block and input block.
Example: This is not necessary.
OUT block 1

IN block 1

Node address 01

Node address 02

Node address 03

c) The same node address cannot be allocated more than once.
Example:

114

OUT block 1

OUT block 2

Node address 02

Section 4-4

User-set Allocations

d) The start bit for node addresses can be bit 00 or bit 08. If it is bit
08 however, 2 or more bytes cannot be allocated as shown below.
Start byte

e) Multiple masters cannot share the same slave.
Master

Master

Slave

You can determine whether there are duplicate node addresses in the
I/O allocations (scan lists) that were created simply by conducting a
master parameter file duplicate check from the Configurator.
f) Be sure to use user-set allocations and operate with the scan list
enabled if multiple masters are connected to a single network. A
Bus OFF errors will occur if multiple fixed allocations masters operating with the scan list disabled are present on a single network.
g) Multiple Master Units can be included in a single PC as shown below using user-set allocations (16 Units max.).
Master Unit
Master Unit

Slave
Slave

Note Use Configurator Ver. 2.10 or later for the CJ1W-DRM21.
Example of User-set Allocations Using the Configurator
OUT area

Allocation status
Slave types

Node
address
setting

Node
address

Output

Input

00
Allocation (00)

16 pts

0 pts

CIO 1950

8 pts

CIO 1951 Allocation (01)

16 pts

CIO 1952

8 input pts

0 pts

8 pts

CIO 1953

Allocation

32 output pts

32 pts

0 pts

CIO 1954

Allocation

Output

Input

Node
address
setting

Node
address

48 input pts

0 pts

48 pts

8 input pts

0 pts

8 pts

Combination of 8 output
and 16 input pts

8 pts

16 pts

IN block 1

OUT block 1
15

16 output pts
Combination of 8 input
and output pts
Combination of 16 input
and output pts

Slave types

IN area

00
Allocation (02)

CIO 1900

CIO 1901 Allocation (01) Allocation (03)

Not used

Allocation (02)

15
01000

(10)

OUT block 2
Not used

Allocation (12)

IN block 2

10 wd

Allocation

11 wd

Allocation

12 wd

Allocation

13 wd
14 wd
15 wd

(04)

Not used
Allocation (12)
Not used

Allocation (09)

115

Starting and Stopping Remote I/O Communications

Section 4-5

Configurator Setting Methods
Refer to the DeviceNet Configurator Operation Manual (W382) for setting
methods.

4-5
4-5-1

Starting and Stopping Remote I/O Communications
Starting Remote I/O Communications
Remote I/O communications start automatically after the power is turned ON
or the Unit is restarted.
The I/O Data Communications Flag (word n+12, bit 15) is turned ON when
remote I/O communications is started with at least one slave.

4-5-2

Stopping Remote I/O Communications
Remote I/O communications stop under the following user-controlled conditions. Message communications can still be performed when the remote I/O
communications stop.

Stop Communications
With All Slaves

Remote I/O communications stop when the Remote I/O Communications
Stop Switch (word n, bit 04) is turned ON.

Stop Communications
With a Specified Slave

Remote I/O communications stop when the Disconnect/Connect Switch for
the desired slave (words n+6 to n+9) is turned ON. (Units are disconnected
from remote I/O communication when the Disconnect/Connect Switch is
turned ON.)
Note The communications cycle time is not shorter even though a slave has been
disconnected from remote I/O communications by turning ON the Disconnect/
Connect Switch. (Blank time in the communications cycle will only be
increased.)

4-5-3

Restarting Remote I/O Communications
Remote I/O communications restart under the following conditions,

Restart Communications
with All Slaves

Remote I/O communications restart when the Remote I/O Communications
Start Switch (word n, bit 01 or 03) is turned ON. (Only communications with
slaves stopped using the Disconnect/Connect Switch will be restarted.)

Restart Communications
with Specified Slave

Remote I/O communications restart when the Disconnect/Connect Switch for
the desired slave (words n+6 to n+9) is turned ON. Restoring the unit will have
been completed when the Disconnect/Connect Switch turns OFF.)

4-6

Example of Ladder Programming for Remote I/O
Communications
When writing ladder programming for remote I/O communications, make sure
it performs I/O processing with a Slave under the following conditions:
• The I/O Data Communications Flag (word n+12, bit 15) is ON.
• The Unit Error Flag (word n+10, bit 00) is OFF.
Example: There is no jump and slave I/O is processed when the JMP(004)
instruction input condition is ON in the following instructions. There is a jump
and slave I/O is not processed when the JMP(004) instruction input condition
is OFF.

116

Example of Ladder Programming for Remote I/O Communications

Section 4-6

I/O Data Communications Unit Error Flag
Flag (word n+12, bit 15) (word n+10, bit 00)

Slave I/O processing

Note Even if there is a communications error with the slave, the slave input data is
saved in the allocated area.
To prevent operating errors, make the ladder program so that no slave I/O processing will occur when the Unit Error Flag (word n+10, bit 00) is ON.

117

Section 4-7

Errors that May Occur in Remote I/O Communications

4-7

Errors that May Occur in Remote I/O Communications
The following errors may occur during remote I/O communications.

Condition

Error
occurs in
fixed allocations
with the
scan list
disabled

Error
occurs in
either fixed
or user-set
allocations
with the
scan list
enabled

118

Error

Structure
Error Flag
(word n+12,
bit 04) turns
ON

Verification
Error Flag
(word n+12,
bit 00) turns
ON

Details

Results

Reconnect with
the error slave
and continue
remote I/O communications.

Indicators

7segment
display

MS: Not
related
NS:
Flashes
red

Duplicate I/
O area

The same I/O word is allocated to
two or more slaves. (This occurs
whenever a slave that is allocated
multiple words has one of the
words allocated to the node
address of another Slave.)

I/O area
range
exceeded

A slave is allocated an area outside the fixed allocations area.
(This occurs whenever slaves are
allocated multiple words and a
slave is allocated a word beyond
node address 63 in the fixed allocations area.)

Unsupported
Slave

The I/O size of a slave exceeds
200 bytes (100 words). (This
occurs if either the IN or the OUT
size exceeds 200 bytes.)

No slaves
present

A Slave registered in the scan list
is not present.

I/O size
mismatched

The I/O size registered in the scan
list does not match the I/O size of
the slave.
Note I/O size is compared in 8point (1-byte) units. If I/O
size is registered at 8
points for example, then an
error I/O size mismatch will
not occur with a Slave with
just one input point connected.

Incorrect
vendor

The vendor registered in the scan
list does not match the slave vendor.

Incorrect
The device type registered in the
device type scan list does not match the slave
device type.

Incorrect
product
code

The product code registered in the
scan list does not match the slave
product code.

Incorrect
connection
bus

The connection bus registered in
the scan list is set incorrectly.

UnsupThe slave does not support the
ported con- connection registered in the scan
nection
list.

Section 4-7

Errors that May Occur in Remote I/O Communications
Condition

Fixed or
user-set
allocations

Error

Details

I/O communications error

A timeout occurred during remote
I/O communications. (The Slave
response timed out 6 times in a
row or an error occurred 3 times in
a row.)

Network power error

The network is not supplying communications power.

Send timeout

A communications request was
not successfully completed due to
the following reasons:
• There are no devices on the network.
• Baud settings do not match for
every node.
• CAN controller error

Duplicated node address

The master node address is the
same address as another node.

Bus OFF detected

Bus OFF error was detected.

Master scan list logic error

The master scan list data is incorrect.

Results

Reconnect with
the error Slave
and continue
remote I/O communications.
*1

Indicators

7segment
display

MS: Not
related
NS:
Flashes
red

MS: Not
related
NS: Goes
out

E0
E2

All communications stop (remote
I/O communications stop, slave
operation stops,
and message
communications
are disabled).

MS: Not
related
NS:
Flashes
red

Remote I/O communications stop
(Slave operation
stops, but message communications are
enabled).

MS:
Flashes
red
NS: Not
related

Note Remote I/O communications will stop (7-segment display: A0) if DIP switch
pin 3 on the front panel is turned ON to specify stopping remote I/O communications for I/O communications errors.

119

SECTION 5
Remote I/O Slave Communications
This section describes the remote I/O communications performed as a DeviceNet slave by the DeviceNet Unit.
5-1

5-2

5-3

Slave Remote I/O Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

122

5-1-1

Allocation Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

122

5-1-2

Remote I/O and Slave Communications Specifications . . . . . . . . . .

123

5-1-3

Procedures for Using Remote I/O Slave Communications . . . . . . .

123

Fixed Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

125

5-2-1

Allocated Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

125

5-2-2

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

125

User-set Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

126

5-3-1

Connection Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

127

5-3-2

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

127

5-3-3

Connection Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

130

121

Section 5-1

Slave Remote I/O Communications

5-1

Slave Remote I/O Communications
A CS/CJ-series DeviceNet Unit can function as a Slave Unit in remote I/O
communications and a single CS/CJ-series DeviceNet Unit can function as
both a Master Unit and a Slave Unit. This section describes Slave communications.

Slave Communications
CS/CJ-series DeviceNet Unit (Master)
CS/CJ-series CPU Unit

IN area

OUT area

IN area
CS/CJ-series CPU Unit

OUT area

Remote I/O communications
DeviceNet

CS/CJ-series DeviceNet Unit (Slave)
Slaves

Note

1. In the following descriptions, the areas used to transfer data from the master to the slaves are called OUT areas and the areas used to transfer data
from the slaves to the master are called the IN areas.
2. In the following descriptions, a CS/CJ-series DeviceNet Unit set to function
as a master is referred to as a “Master Unit” and a CS/CJ-series DeviceNet
Unit set to function as a slave is referred to as a “Slave Unit”.

5-1-1

Allocation Methods
All slaves are allocated words in the I/O memory of the CPU Unit to which the
Master Unit is mounted. They are allocated using one of the following methods:
1) Fixed allocations
2) User-set allocations

122

Section 5-1

Slave Remote I/O Communications

5-1-2

Remote I/O and Slave Communications Specifications

Item
Allocation
method

Specifications
Fixed allocations

Select one of the following fixed allocation areas using the Slave Fixed Allocated Area
Switches 1, 2, and 3 in the software switches in the allocated CIO Area words.
Allocated words
(CIO Area)

Note
User-set
allocations

I/O

Fixed Allo- Fixed Allo- Fixed Allocation Area cation Area cation Area
Setting 1
Setting 2
Setting 3

Output (OUT) area 1 word
to the slave from
the master

3370

3570

3770

Input (OUT) area to 1 word
the master from the
slave

3270

3470

3670

Select one of the preceding areas using the software switches. All are fixed at 1 word
per node address. The default setting is Fixed Allocation Area Setting 1.

By allocated DM
Area words

Set the areas, the first words, and slave allocation size for the OUT 1
and IN 1 blocks (total of 2 blocks) using the Slave User Allocation Setup
Table in the allocated DM Area words.
Allocated words

By Configurator

Max. No. of I/ Fixed allocations
O points per User-set
By allocated DM
DeviceNet
allocations Area words
Unit slave
By Configurator

The input and output areas can be the following
sizes starting from any word in any of the following
areas: CIO Area, WR Area, HR Area, DM, Area, or
EM Area.
Output (OUT) area from this slave

100 words

Input (IN) area to this slave

100 words

Set the areas for the OUT 1 and IN 1/2 blocks, the first words, and the
slave allocation sizes using the Configurator.
Allocated words

5-1-3

Size

The input and output areas can be the following
sizes starting from any word in any of the following
areas: CIO Area, WR Area, HR Area, DM, Area, or
EM Area.
Output (OUT) area from this slave

100 words

Input (IN) area to this slave

100 words

32 points (1 input word, 1 output word)
3,200 pts (100 input words, 100 output words)
4,800 pts (100 input words x 2, 100 output words x 1)

Procedures for Using Remote I/O Slave Communications

Fixed Allocations for Remote I/O
1,2,3...

1. Turn ON the communications, slave, and PC power supplies.
Note Turn ON the communications power supply prior to turning ON the
slave power supply or the slaves may not go online.
2. Switch the CPU Unit to PROGRAM mode.
3. Turn ON the Slave Stop Switch (word n+1, bit 07) from the PC Programming Device to stop slave communications.
4. Turn ON one of the Slave Fixed Allocation Setting Switches (1 to 3: word
n+1, bits 08 to 10) from a Programming Device.
5. Turn ON the Slave Enable Switch (word n+1, bit 06) from a Programming
Device to enable slave communications.
6. Switch the CPU Unit to RUN mode.
Slave remote I/O communications will start up.

Note Slave communications must be disabled prior to area allocation and must be
enabled after area allocation. The order of the procedure is 1) stop slave com-

123

Slave Remote I/O Communications

Section 5-1

munications, allocate areas, and then enable slave communications. The allocated areas will not be valid if the procedure is done in any other order.
User-set Remote I/O Allocations Using DM Area Settings
1,2,3...

1. Turn ON the communications, slave, and PC power supplies.
Note Turn ON the communications power supply prior to turning ON the
slave power supply or the slaves may not go online.
2. Switch the CPU Unit to PROGRAM mode.
3. Turn ON the Slave Stop Switch (word n+1, bit 07) from the PC Programming Device to stop slave communications.
4. Allocate areas as follows:
a) Set the Slave User Allocation Setup Table (m+8 to m+13 words) and
the Allocation Size Setup Table in the allocated DM Area words from a
Programming Device.
b) Turn ON the Slave User Allocations Switch (word n+1, bit 11) from a
Programming Device.
5. Turn ON the Slave Enable Switch (word n+1, bit 06) from a Programming
Device to enable slave communications.
6. Switch the CPU Unit to RUN mode.
Slave remote I/O communications will start up.

Note

1. Slave communications must be disabled prior to area allocation and must
be enabled after area allocation. The order of the procedure is 1) stop
slave communications, allocate areas, and then enable slave communications. The allocated areas will not be valid if the procedure is done in any
other order.
2. In fixed allocation or user-set allocations through the allocated DM Area
settings, area allocations must be set with slave communications disabled
and will be transferred to Units when slave communications are enabled.

User-set Remote I/O Allocations Using the Configurator
1,2,3...

124

Section 5-2

Fixed Allocations
Note

1. Enable slave communications in CS1W-DRM21 or CJ1W-DRM21 properties if the Configurator is used.
2. Use Configurator Ver. 2.10 or later for the CJ1W-DRM21.

5-2
5-2-1

Fixed Allocations
Allocated Words
Words in the CS/CJ-series DeviceNet CIO Area in the CPU Unit are allocated.
Words can be selected from one of three fixed allocation areas. Use a Software Switch to select the allocation area.
Each area is comprised of an OUT area that is used to write data to the master IN area and an IN area that is used for inputs from the master OUT area in
remote I/O communications.
Area

OUT area
(master to slave)

IN area
(slave to master)

Selection method

Fixed allocation area 1

CIO 3370

CIO 3270

Turn ON the Slave Fixed Allocation Setting 1 Switch (word n, bit 08).

Fixed allocation area 2

CIO 3570

CIO 3470

Turn ON the Slave Fixed Allocation Setting 2 Switch (word n, bit 09).

Fixed allocation area 3

CIO 3770

CIO 3670

Turn ON the Slave Fixed Allocation Setting 3 Switch (word n, bit 010).

A maximum of 3 DeviceNet Units can be included as slaves in a single PC
because the three allocation areas above are set individually for fixed allocations. The default setting is fixed allocations area 1.

5-2-2

Procedure

Step 1: Stop Slave
Communications

If the Unit is already functioning as a Slave Unit, turn ON the Slave Stop
Switch (word n+1, bit 07) to stop slave communications. This step is not necessary if slave communications have already stopped.

Step 2: Select a Fixed
Allocation Area

Turn ON one of the Slave Fixed Allocation Setting Switches (1 to 3: word n+1,
bits 08 to 10) in the allocated CIO Area words to select a fixed allocation area
between 1 and 3. One words is allocated for the output (OUT) area from the
Slave Unit to the master and another word is allocated for the input (IN) area
from the master to the Slave Unit in the CS/CJ-series DeviceNet CIO Area, as
shown below.
First word n = CIO 1500 + (25 x unit number)

Software switch
address

Software switch name

Fixed allocation area

Allocated output
(OUT) area
(master to slave)

Allocated input (IN)
area
(slave to master)

Word n+1, bit 08

Slave Fixed Allocation
Setting 1 Switch

Fixed allocation area 1

CIO 3370

CIO 3270

Word n+1, bit 09

Slave Fixed Allocation
Setting 2 Switch

Fixed allocation area 2

CIO 3570

CIO 3470

Word n+1, bit 10

Slave Fixed Allocation
Setting 3 Switch

Fixed allocation area 3

CIO 3770

CIO 3670

Step 3: Turn ON the Slave
Enable Switch

Turn ON the Slave Enable Switch (word n+1, bit 06). This will allocated the
fixed allocation areas as slave areas and the DeviceNet Unit will start slave
remote I/O communications. Slave communications will run automatically
after that whenever the power is turned ON.

125

Section 5-3

User-set Allocations
Fixed Allocation Area 1
CS/CJ-series DeviceNet CIO Area
Master

Slave
Bit

Bit

0
OUT area

Output (OUT) area

CIO 3370
15

0
Input (IN) area

CIO 3270

IN area

Fixed Allocation Area 2
CS/CJ-series DeviceNet CIO Area
Bit

Slave
15

0
OUT area

Output (OUT) area

CIO 3570
Bit

Master

0
IN area

Input (IN) area

CIO 3470

Fixed Allocation Area 3
CS/CJ-series DeviceNet CIO Area
Master

Slave
Bit

CIO 3770
Bit

0
Output (OUT) area

CIO 3670

5-3

OUT area
0

Input (IN) area

IN area

User-set Allocations
With a CS/CJ-series DeviceNet Unit, remote I/O communications slaves can
be allocated in any area (CIO, WR, HR, DM, or EM) using one of the following
methods.
• Setting through the allocated DM Area words (Slave User Allocations
Table)
• Setting through the Configurator

User-set Allocations Methods
Method

Set through the allocated DM Area
words (Master User Allocations Table)

Allocation areas

Set through the Configurator

CIO: 0000 to 6143
WR: W000 to W511
HR: HR000 to HR511
DM: D00000 to D32767
EM: E00000 to E32767 (Banks 0 to C)

No. of allocation blocks

2 blocks: OUT 1 and IN 1

Allocation size

Per block

100 words max.

Total size

200 words max. for a total of 2 blocks

400 words max. for a total of 3 blocks

Automatic (connection specified by the
master)

Automatic or user specified

Connection type

Note

126

3 blocks: OUT 1, IN 1 and IN 2

1. Functions will vary as shown below depending on whether allocations are
set through the allocated DM Area words (Slave User Allocations Table) or
through the Configurator.

Section 5-3

User-set Allocations

2. Only two blocks (OUT 1 and IN 1) can be allocated when setting are made
with the allocated DM Area words area, but there are three blocks (OUT 1
and IN 1/2) available with the Configurator.
Setting through the Allocated DM Area Words (Slave User Allocations Table)
Words can be allocated for the OUT 1 area (master to Slave Unit) and IN 1
area (Slave Unit to master) from any specified I/O memory location specified
in the settings in the allocated DM area words.
Specified area in I/O memory
Master

Slave
Bit
15
First word
specified

OUT 1 area

OUT area

Bit
15
First word
specified

5-3-1

IN area

IN 1 area

Connection Types
The type of connection cannot be specified when the allocated DM area
words is used for settings. The master specifies a poll, bit-strobe, COS, or
cyclic connection.

5-3-2

Procedure
Step 1: Stop Slave Communications
If the Unit is already functioning as a slave, turn ON the Slave Stop Switch
(word n+1, bit 07) to stop slave communications. This step is not necessary if
slave communications have already stopped.
Step 2: Set the Slave User Allocations Table
This table is used to specify the areas, first words, and sizes for OUT block 1
and IN block 1.
• Slave User Allocations Table
First word m = D30000 + (100 x unit number)
Allocated DM area words

Details

Word m+8

Bits 00 to 07

Slave OUT 1 area

Word m+9

Bits 00 to 15

First word of the slave OUT 1
area

Word m+10

Bits 00 to 07

Slave OUT 1 area size (in bytes)

Word m+11

Bits 00 to 07

Slave IN 1 area

Word m+12

Bits 00 to 15

First word of the slave IN 1 area

Word m+13

Bits 00 to 07

Slave IN 1 area size (in byte)

Select from following table

127

Section 5-3

User-set Allocations
• Areas and Word Ranges for the OUT 1/IN 1 Areas
Code

Name

Word range

00 Hex

---

The block is not used.

01 Hex

CIO Area (CIO)

0000 to 17FF Hex (0 to 6143)

03 Hex

DM Area (DM)

0000 to 7FFF Hex (0 to 32767)

04 Hex

Word Area (WR)

000 to 01FF Hex (0 to 511)

05 Hex

Holding Area (HR)

000 to 01FF Hex (0 to 511)

08 Hex to
14 Hex

Expansion Data Memory (EM) 0000 to 7FFF Hex (0 to 32767) for all
Bank 0 to C (13 banks)
banks

Step 3: Turn ON the Slave User Allocations Switch
Turn ON the Slave User Allocations Switch (word n+1, bit 11).
Step 4: Turn ON the Slave Enable Switch
Turn ON the Slave Enable Switch (word n+1, bit 06). This will allocated the
above areas as slave areas and the DeviceNet Unit will start slave remote I/O
communications.
Note Once slave communications are enabled by turning ON the Slave Enable
Switch, the Unit will continue to perform slave communications even after the
power is turned OFF and back ON again.
Slave User Allocations Table in the Allocated DM Area Words
Slave output (OUT) area
Bit
Bit
Specify the first word.

Word m+8

Word m+9
Word m+10
Word m+11
Word m+12
Word m+13

OUT 1
area
First word of the OUT 1 area
OUT 1
area size
IN block 1
area
First word of the IN 1 area

IN 1 area size

Master

First word
specified

Specify the size.
to

OUT area

Specify the
first word.

Slave input (IN) area
Specify the size.

Master

Bit
First word
specified

IN area

Specify the first word.
Specify the size.

Example Settings for User-set Allocations through Allocated DM Area Words
This example uses the following settings for unit number 0.
• OUT block 1 area and first word: WR (04 Hex), 50 (0032 Hex), 20-byte
size (14 Hex, 10 words)
• IN block 1 area and first word: WR (04 Hex), 100 (0064 Hex), 10-byte
size (0A Hex, 5 words)

128

Section 5-3

User-set Allocations
• Slave User Allocations Table

OUT block 1 area : WR (04 Hex)
First word of OUT block 1: 50 (0032 Hex)
OUT block 1 size: 20 bytes (14 Hex, 10 words)
IN block 1 area : WR (04 Hex)
First word of IN block 1: 100 (0064 Hex)
IN block 1 size: 10 bytes (0A Hex, 5 words)

• Slave areas
OUT area 1

IN area 1

Step 1: Turn ON the Slave User Allocations Switch
Make sure that slave communications have stopped prior to performing this
operation. Turn ON the Slave User Allocations Switch (word n+1, bit 11:
CIO 150111 in this example). This will allocate the above areas as slave
areas and the DeviceNet Unit will start slave remote I/O communications.
Step 2: Turn ON the Slave Enable Switch
Turn ON the Slave Enable Switch (word n+1, bit 06: CIO 150106 in this example). This will allocate the above areas as slave areas and the DeviceNet Unit
will start slave remote I/O communications.

129

Section 5-3

User-set Allocations
Setting through the
Configuration

A maximum of three blocks can be allocated at any locations in I/O memory
for the output (OUT) area block 1, input (IN) area block 1, and input (IN) area
block 2.
Specified area in I/O memory
Master

User-set block order
Bit
15
First word
specified

Slave output
(OUT) area 1

Bit
15
First word
specified

Slave input
(IN) area 1

15
Bit
First word
specified

OUT area

IN area

Slave input
(IN) area 2

IN area

The block allocation order and block allocation areas can be set as required.
Refer to the DeviceNet Configurator Operation Manual (W382) for details on
the allocation procedure.

5-3-3

Connection Types
The type of connection can be specified if the Configurator is used for settings. The number of applicable allocation areas varies with the type of connection used.
• A maximum of three areas (OUT 1, IN 1, and IN 2) can be used when
multiple connections are specified.
• Two allocation areas (OUT 1 and IN 1) can be used if the automatic connection setting or a single connection is specified.

130

Section 5-3

User-set Allocations
Connection Types and Allocated I/O Areas

The following table shows the relationship between various connection combinations and the allocated areas that are applicable with those connections.
Specified connection
type

OUT 1 area

IN 1 area
Poll IN data

IN 2 area

Poll

Poll OUT data

Not used

Bit-strobe

Not used

Bit-strobe IN data

Not used

COS

COS OUT data

COS IN data

Not used

Cyclic

Cyclic OUT data

Cyclic IN data

Not used

Poll+bit-strobe

Poll OUT data

Poll IN data

Bit-strobe IN data

Poll+COS (See note.)

Poll/COS OUT data

Poll IN data

COS IN data

Poll+cyclic (See note.)

Poll/cyclic OUT data

Poll IN data

Cyclic IN data

COS+bit-strobe

COS OUT data

COS IN data

Bit-strobe IN data

Cyclic+bit-strobe

Cyclic OUT data

Cyclic IN data

Bit-strobe IN data

Note

1. With poll + COS connections, the OUT data is the same for poll and COS.
Set the same OUT areas for poll and COS connections when specifying
the areas with the Configurator. With poll + cyclic connections as well, the
OUT data is the same for poll and cyclic. Set the same OUT areas for poll
and cyclic when specifying the areas with the Configurator.
2. Use Configurator Ver. 2.10 or later for the CJ1W-DRM21.

131

SECTION 6
Message Communications
This section describes message communications using FINS commands sent from the ladder program in the CPU Unit of
the PC.
6-1

6-2

6-3

6-4

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

134

6-1-1

Outline of Message Communications. . . . . . . . . . . . . . . . . . . . . . . .

134

6-1-2

FINS Message Communications . . . . . . . . . . . . . . . . . . . . . . . . . . .

135

6-1-3

Explicit Message Communications . . . . . . . . . . . . . . . . . . . . . . . . .

137

6-1-4

Message Communications Specifications . . . . . . . . . . . . . . . . . . . .

138

6-1-5

Message Communications Error Indications . . . . . . . . . . . . . . . . . .

139

6-1-6

Message Monitoring Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

140

6-1-7

Message Communications Errors . . . . . . . . . . . . . . . . . . . . . . . . . . .

140

FINS Commands and Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

141

6-2-1

FINS Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

141

6-2-2

Sending/Receiving FINS Command/Responses. . . . . . . . . . . . . . . .

142

6-2-3

Units Supporting FINS Communications. . . . . . . . . . . . . . . . . . . . .

143

6-2-4

FINS Command Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

143

Using FINS Message Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

145

6-3-3

Data Send/Receive Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . .

148

6-3-4

Sending FINS Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

150

6-3-5

Using SEND(090), RECV(098), and CMND(490) . . . . . . . . . . . . .

151

Sending Explicit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

158

6-4-1

Sending Explicit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

159

6-4-2

Sending Explicit Messages Using CMND(490). . . . . . . . . . . . . . . .

161

Receiving Explicit Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

165

6-5-1

List of PLC Object Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

166

6-3-6 Connecting Networks for FINS Communications . . . . . . . . . . . . . . . . . . . . .

157

6-5

133

Section 6-1

Overview

6-1

Overview
Message communications enable messages to be set between nodes on a
DeviceNet network when required by system conditions. The messages can
be sent between PCs, between an OMRON PC and a master made by
another company, or between slaves. They can be used to send/receive data;
read time data, error histories, and other data; or control operation, e.g., by
force-setting/resetting bits.
There are two types of messages: FINS messages and explicit messages.

6-1-1

Outline of Message Communications
Item

FINS messages

Explicit messages

Outline

Message communications for
OMRON products that use the
FINS protocol.

General-purpose message communications using the DeviceNet
protocol.

Remote
device

OMRON PCs (with a CS/CJ-series Other manufacturer masters or
DeviceNet Unit)
slaves.
OMRON PCs with C200H or
CVM1/CV-series DeviceNet Master
Unit or CS/CJ-series DeviceNet
Units
OMRON PCs with C200H I/O Link
Units

Features

Provide a greater range of services
than explicit messages by sending
and receiving FINS commands.
Have message compatibility with
other OMRON networks, such as
Controller Link, SYSMAC LINK,
and Ethernet (up to 3 levels)

Enable message communications
with DeviceNet devices from other
manufacturers.
Can receive explicit messages
from OMRON PCs with C200H- or
CVM1/CV-series DeviceNet Master
Units and can send explicit messages to OMRON PCs with C200H
I/O Link Units

Send
FINS communications function
Receive
Message communications functions

Explicit message
communications function

Send
Receive

134

Section 6-1

Overview
Overall Structure
CPU Unit
CMND(490)
instruction

CMND(490)
instruction
(2801 Hex)

DeviceNet Unit

FINS message

FINS

Explicit message

FINS
message
function

Explicit
message
function

OMRON special message communications
FINS message

DeviceNet network

DeviceNet message communications
Explicit message

Note If only the message communications function is being used and the remote I/
O communications function is not being used, message communications are
possible even if the master function is disabled. In this case, it is not necessary to register a scan list.

6-1-2

FINS Message Communications
Messages can be exchanged using FINS commands between DeviceNet
nodes (masters and/or slaves) that support FINS messages.

Type of FINS message
Network
communications
instructions
PC to PC (both must be
CS/CJ-series PCs with a
CS/CJ-series DeviceNet
Unit) (See note 1.)
Note: Inter-network
communications is possible with other
DeviceNet networks,
Controller Link networks,
or other networks. (See
note 2.)

Data send/receive
SEND/RECV instructions

CS/CJ-series PC

CS/CJ-series P

FINS commands
CMND(490) instructions

CS/CJ-series PC

CS/CJ-series PC
Command to
Master Unit

Command

CS/CJ-series PC
Command to
CPU Unit
Command

PC to OMRON Slave

CS/CJ-series PC

Command

Slave
Slave

Data length (excluding
command code)

SEND instruction: 267 words; RECV instruction: 269 words

542 bytes max.

135

Section 6-1

Overview
Note

1. The DeviceNet Unit must be registered in the local network routing table of
the CS/CJ-series PC when two or more Communications Units (including
the DeviceNet Unit) are mounted to a CS/CJ-series PC. The commands
will not be sent if the Unit is not registered in the routing tables.
2. For DeviceNet networks connected to a CS/CJ-series DeviceNet Unit,
message communications can be conducted between networks, including
other DeviceNet networks as well as Controller Link, SYSMAC LINK, and
Ethernet networks. Up to three levels of networks can be crossed. Routing
tables (containing local network tables and relay network tables) must be
registered in the CPU Units of each PC on the network.

Up to 3 network levels, including DeviceNet, can be crossed.
Controller Link Unit

Controller Link Unit
CS/CJ-series DeviceNet Unit
CS/CJ-series CPU Unit

Remote I/O communications
CS/CJ-series DeviceNet Unit
DeviceNet

Controller Link

CS/CJ-series DeviceNet Unit
DeviceNet

Note FINS commands sent and received by the CS/CJ-series DeviceNet
Unit include commands addressed to the CS/CJ-series CPU Unit
and commands addressed to the CS/CJ-series DeviceNet Unit.
FINS message communications is possible between two PCs with CS1WDRM21 or CJ1W-DRM21 DeviceNet Units.
FINS messages cannot be sent or received for PCs with C200H-series
DeviceNet Master Units (C200HW-DRM21-V1) or CVM1/CV-series
DeviceNet Master Units (CVM1-DRM21-V1). Explicit messages, however, can
be received from these PCs.
The following table outlines which CPU Unit support for FINS message communications.
CPU Unit
sending
message

Mounted
DeviceNet
Unit/
DeviceNet
Master Unit

CS Series

CS1WDRM21

CJ Series

CJ1WDRM21

CS Series

FINS message

Instructions
to send/
receive data

Instructions
to execute
any FINS
command

CPU Unit in receiving message
CS
Series

CJ Series

CS1WDRM21

CJ1WDRM21

CS
Series

C200HX/
HG/HE

C200HW- C200HWDRM21DRM21V1
V1

CVM1/CV
Series
CVM1DRM21V1

SEND/RECV

CMND

Can receive

Cannot
receive

C200HWDRM21-V1

Not supported

IOWR

Cannot receive

Can
receive

C200HX/HG/ C200HWHE
DRM21-V1

Not supported

IOWR

Cannot receive

Can
receive

CVM1/CV
Series

SEND/RECV

CMND

Cannot receive

Can
receive

136

CVM1DRM21-V1

Section 6-1

Overview
Sending FINS Message Communications
CS1W-DRM21
CJ1W-DRM21

CS1W-DRM21
CJ1W-DRM21
CS/CJ-series
CPU Unit

C200HW-DRM21-V1

CVM1-DRM21-V1

CVM1/CVseries
CPU Unit

C200HX/HG
/HE (-Z)
CPU Unit

CS/CJ-series
CPU Unit

Command can be sent.

DeviceNet
Command cannot be sent.

X
X

Command cannot be sent.

Receiving FINS Message Communications
CS1W-DRM21
CJ1W-DRM21

CS1W-DRM21
CJ1W-DRM21
CS/CJ-series
CPU Unit

CS/CJ-series
CPU Unit

Command can be received

X
X

C200HW-DRM21-V1

C200HX/HG/
HE (-Z) CPU
Unit

CVM1-DRM21-V1

CVM1/CVseries
CPU Unit

DeviceNet

Command cannot be received
Command cannot be received

Note C200H-series DeviceNet Master Units (C200H-DRM21-V1) and CVM1/CVseries DeviceNet Master Units (CVM1-DRM21-V1) both support FINS message communications but it is executed by a special OMRON method. With
this CS/CJ-series DeviceNet Unit (CS1W-DRM21 or CJ1W-DRM21), the
standard message protocol for DeviceNet (i.e., explicit messages) has been
used for FINS communications. For this reason, FINS communications is not
possible between CS/CJ-series DeviceNet Units (CS1W-DRM21 or CJ1WDRM21) and C200H-series DeviceNet Master Units (C200H-DRM21-V1) or
CVM1/CV-series DeviceNet Master Units (CVM1-DRM21-V1).

6-1-3

Explicit Message Communications
Service requests can be sent to C200H I/O Link Units and other OMRON
slaves, PCs with CS/CJ-series DeviceNet Units, and DeviceNet masters and
slaves made by other manufacturers using explicit messages defined for
DeviceNet.
Service requests to read/write CPU Unit status I/O memory can also be
received from PCs with C200H-series DeviceNet Master Units (C200HWDRM21-V1), PCs with CVM1/CV-series DeviceNet Master Units (CVM1DRM21-V1), PCs with CS/CJ-series DeviceNet Units, and DeviceNet masters
made by other manufacturers using explicit messages.

137

Section 6-1

Overview

Note A specific FINS command (command 2801) is used to send explicit messages.
Item

Sending

Receiving

Network commu- CMND(490) using FINS command code 2801 Hex
nications instruc- can be used to send explicit messages to
tion
DeviceNet devices. (See note.)

Automatically responds to explicit messages
from other devices.

Remote devices
and supported
functions

Masters made by other manufacturers.
PCs with CS/CJ-series DeviceNet Units.
PCs with C200H-series DeviceNet Master Units.
PCs with CVM1/CV-series DeviceNet Master
Units.
All listed devices support status read/write and I/
O memory read/write for the local CPU Unit.

Masters/slaves made by other manufacturers. Supported services determine supported functions.
PCs with CS/CJ-series DeviceNet Units mounted.
Remote CPU Unit status read/write and I/O memory
read/write functions supported.
PCs with C200H I/O Link Units mounted. Remote
CPU Unit I/O memory read/write function supported.

Note A specific FINS command (command 2801) is used to send explicit
messages.
Note This CS/CJ-series DeviceNet Unit (CS1W-DRM21 or CJ1W-DRM21) contains
a PLC Object so that the I/O memory of the CPU Unit of the DeviceNet Unit
can be read/written from other devices. The C200HW-DRT21 I/O Link Unit
also contains a PLC Object so that the I/O memory of the CPU Unit of the I/O
Link Unit can be read/written from other devices. The C200HW-DRM21-V1
and CVM1-DRM21-V1 DeviceNet Master Units, however, do not have PLC
Objects, the I/O memory of the CPU Unit for these Units cannot be read or
written from other devices.

6-1-4

Message Communications Specifications
Item

Specification

Applicable PC

CS/CJ-series

Unit model number

CS1W-DRM21/CJ1W-DRM21

Max. No. of communications nodes per Unit

FINS messages

62 (node address 0 cannot be used for FINS communications)

Explicit mes- 63
sages
Communications instructions

Sending/
receiving
data

SEND and RECV instructions

FINS commands

CMND(490) instruction

Explicit
DeviceNet
messages

CMND(490) instruction

There are FINS commands addressed to the PC and others addressed to
the CS/CJ-series DeviceNet Unit.
Note: FINS commands can be sent to PCs with CS/CJ-series DeviceNet
Units mounted to them. FINS commands cannot be sent to PCs with
C200HW-DRM21-V1 or CVM1-DRM21-V1 DeviceNet Master Units
mounted to them.
Sends explicit messages to masters/slaves made by other manufacturers,
PCs with C200H I/O Link Units, or PCs with CS/CJ-series DeviceNet Units
mounted to them.

Sources:destinations

1:1 (Broadcasting is not supported)

Data length (excluding command code)

SEND: 267 words max.
RECV: 269 words max.
CMND 542 bytes max.

No. of simultaneous instructions

One each for 8 ports (ports 0 to 7)
Refer to the section on CMND(490) in the CS/CJ Series Programmable
Controllers Instructions Reference Manual (W340) for information on ports
(logical ports).

138

Section 6-1

Overview
Item

Specification

Response monitoring time

Default setting:
User setting:

Retries

2s
0.1 to 6553.5 s

0 to 15

FINS message communications
commands

Received from CS/CJseries CPU Unit with CS/
CJ-series DeviceNet Unit

Supported (Data send/receive or FINS commands).

Received from CVM1/CVseries CPU Units with
CVM1/CV-series DeviceNet
Master Unit

Not supported.

Received from CS/CJseries and C200HX/HG/HE
CPU Units with C200Hseries DeviceNet Master
Unit
Received from C200HX/HG/
HE Units with C200H-series
DeviceNet Master Unit
Internetwork connections

Same network type

Supports internetwork communications between DeviceNet networks with
CS/CJ-series DeviceNet Units mounted (up to 3 levels).

Different net- Supports internetwork communications between DeviceNet networks with
work type
CS/CJ-series DeviceNet Units mounted and other networks (Controller
Link, SYSMAC LINK, and Ethernet; up to 3 levels).
Message monitor timer function (explicit
message communications)

6-1-5

The response monitoring time for DeviceNet Units during explicit message
communications (the interval the explicit connection is open) can be set
from the Configurator for each device. (The settings for all devices can be
stored in the DeviceNet Unit. This is called the Message Monitoring Timer
List.)

Message Communications Error Indications
There are two ways to obtain information on communications errors that occur
in message communications: 1) Using the error history in the DeviceNet Unit
and 2) Using DeviceNet Unit displays, indicators, and Master Status Areas.
1,2,3...

1. Each time a communications error occurs, an error code is placed in an error record in the error history kept in the RAM of the DeviceNet Unit. Up to
64 records can be stored in the error history. The time and data the record
occurred is also recorded.
The error history can be read or cleared from the CPU Unit by sending an
FINS command to the DeviceNet Unit (Error History Read/Clear). The contents of the error history can also be monitored from the Configurator.
Code
Code

64 records

Code
FINS command
Read-out
Monitor

CPU Unit
Configurator

2. The MS and NS indicators and the 7-segment display on the front panel of
the DeviceNet Unit can be used together with the Master Status Area 1 in
the CPU Unit to obtain information on a communications error that has occurred. This information can be used as the basis for troubleshooting.

139

Section 6-1

Overview
Example: Routing table error
Flashing red
Not relevant
Master Status Area 1

DeviceNet Unit

6-1-6

CPU
Unit

Message Monitoring Timer
A message monitoring timer monitors responses for the DeviceNet Unit. A
timer can be set for each device that will be communicated with (each message destination).
Message monitoring timers are supported for both explicit message and FINS
message communications. The timers can be set with version 2 or later of the
DeviceNet Configurator. The default setting is 2 seconds (2,000 ms). The setting range is 500 to 30,000 ms.
If the response from the remote communications device (message destination) is slow, the timer setting must be increased. In particular, responses take
time in FINS message communications that cross different network layers, so
this setting must be increased. The next message cannot be sent to the same
communications device during the response waiting time, so the setting
should not be set too high.
The DeviceNet Unit uses this timer to monitor message timeouts. The CPU
Unit performs the monitoring based on the response monitoring time for
CMND, SEND(090), and RECV instructions. There will be no effect, therefore,
if either the message monitoring timer or the response monitoring time for
CMND/SEND/RECV instructions setting only is increased or decreased. Both
must be increased or decreased for there to be an effect.
Set the response monitoring time for the CMND, SEND(090), and RECV
instructions the same as or longer than the message monitoring timer, i.e.,
CMND, SEND(090), RECV instructions ≥ message monitoring timer.
If a lot of timeouts occur, maintain this relationship but lengthen the time for
both.
Note When performing remote programming or monitoring from the CX-Programmer (scheduled to be supported by version 2.1 and later), set the message
monitoring timer in the CS/CJ-series DeviceNet Unit mounted to the PC connected to the CX-Programmer to at least 20 s (20,000 ms). This setting is
required only for the Unit that will perform remote programming.

6-1-7

Message Communications Errors
The following table shows the main errors that occur when messages are sent
or received. Refer to SECTION 9 Troubleshooting and Maintenance for coun-

140

Section 6-2

FINS Commands and Responses

termeasures and errors recorded in error history that are not shown by the
indicators.
Error

Indicators
MS

Network power error

No change

NS
Not lit

Send timeout

Unit status 1
(word n+10)

Error
history
code (Hex)

Bit 07 turns
ON.

0341

Bit 08 turns
ON.

0342

7-segment
display

Routing table error

Flashing red No change

Bit 12 turns
ON.

021A

Node address duplicated

No change

Bit 06 turns
ON.

0211

Bit 05 turns
ON.

0340

Flashing red Not lit

––

0002

No change

––

0101

Lit red

Bus Off detected
CPU Unit service monitoring error
Other CPU error

Local node not part of network; cannot send

No change

0006

No. of retries limit exceeded; cannot send

0103

Remote device busy; cannot send

0109

Header error; cannot send

0112

Reception buffer full; message destroyed

0117

Illegal message received; received message
destroyed

0118

Local node busy; cannot send

0119

Note

1. The 7-segment display alternately displays the error and the master node
address where the error occurred.
2. The send response message or reception response message will be destroyed if any of the following occur:
• If any communications instructions (SEND(090), RECV(098), or
CMND) are executed from the PC at intervals less than the message
communications time.
• If messages are received from other nodes at intervals less than the
message communications time.
Be sure that the interval between sending messages (i.e., the interval for
executing communications instructions from the PC) and the interval for receiving messages at any one node are longer than the message communications time. Refer to 8-2 Message Communications for details on the
message communications time.

6-2
6-2-1

FINS Commands and Responses
FINS Communications
The FINS communication protocol was developed by OMRON for use with
factory automation control devices. FINS communications enable PC memory
read/write and operation control without extensive programming in the user
program in the PC. FINS communications use an independent system of
addresses that does not rely on the addresses used in the DeviceNet network. This enables communications not only with nodes on the DeviceNet
network, but also with devices and PCs connected via other FA networks,
such as the SYSMAC NET and SYSMAC LINK Networks.

141

Section 6-2

FINS Commands and Responses

Refer to SYSMAC CS/CJ Series Communication Commands Reference Manual (W342) for details on FINS commands.

6-2-2

Sending/Receiving FINS Command/Responses
FINS commands are sent using the CMND(490) instruction for CS/CJ-series
PCs. Send/receive FINS commands and responses and the data formats
used are illustrated in the following diagram. Unless otherwise specified, all
data is hexadecimal.

(For CS/CJ-series PC)

1 byte

Word

Command

Word
Response

2 bytes

540 bytes max.

FINS header
DeviceNet
Unit

Automatically Command
generated
code
and attached

Text
CS/CJ-series CPU Unit

Command
DeviceNet network

Response
2 bytes 2 bytes

538 bytes max.

FINS header
Automatically
generated
and attached

Command Response
code
code

Text

Command Codes

Command codes are represented by a 2-byte hexadecimal code. FINS commands always begin with a 2-byte command code and any parameters that
are required follow the command code.

Response Codes

Response codes are represented by a 2-byte hexadecimal code that indicates
the results of command execution. The first byte provides the main response
code (MRES), which classifies the results, and the second byte provides the
sub-response code (SRES), which provides details on the results.

142

Section 6-2

FINS Commands and Responses

The main response codes are listed below. Refer to SYSMAC CS/CJ Series
Communication Commands Reference Manual (W342) for further details on
response codes, including sub-response codes (SRES).
Main code

Main code

00: Normal completion

20: Read not possible

01: Local node error

21: Write not possible

02: Destination node error

22: Not executable in current mode

03: Communications controller error

23: No Unit

04: Unsupported setting error (service
not supported)

24: Start/stop not possible

05: Routing error

25: Unit error

10: Command format error

26: Command error

11: Parameter error

30: Access right error
40: Abort

6-2-3

Units Supporting FINS Communications
The parameters used for FINS commands depend on the Unit that is processing the command. Command details are provided in Appendix E FINS Commands and Responses for DeviceNet Units for commands and responses
addressed to DeviceNet Units.
Refer to SYSMAC CS/CJ Series Communication Commands Reference Manual (W342) for information on commands and responses addressed to CS/CJseries CPU Units.

6-2-4

FINS Command Lists

Commands Addressed to CS/CJ-series CPU Units
Function
Manipulating data in data
areas and force-setting/
resetting bits:
CIO Area, DM Area, EM
Area, Timer/Counter Area,
Transition Area, Step Area

Name
MEMORY AREA READ

Command
code
01

MEMORY AREA WRITE
MEMORY AREA FILL

MULTIPLE MEMORY AREA READ

MEMORY AREA TRANSFER

COMPOSITE REGISTRATION READ

Manipulating parameters:
PARAMETER AREA READ
PC Setups, I/O tables, rout- PARAMETER AREA WRITE
ing tables, etc.
PARAMETER AREA CLEAR

Manipulating program
areas

Controlling operation

01
02

PROGRAM AREA PROTECT

01
02
03

PROGRAM AREA PROTECT CLEAR

04
05

PROGRAM AREA READ

PROGRAM AREA WRITE

PROGRAM AREA CLEAR

RUN (RUN, DEBUG, MONITOR modes)

STOP (PROGRAM mode)
Reading PC model information

CONTROLLER DATA READ

Reading PC status

CONTROLLER STATUS READ

CONNECTION DATA READ
CYCLE TIME READ

01
02
01
02

01
20

143

Section 6-2

FINS Commands and Responses
Function
Manipulating the PC clock

Name
CLOCK READ

Command
code
07

CLOCK WRITE
Manipulating messages

MESSAGE READ

01
02

MESSAGE CLEAR
FAL/FALS READ
Controlling access rights

Manipulating error data

Manipulating File Memory

ACCESS RIGHT ACQUIRE
ACCESS RIGHT FORCED ACQUIRE

ACCESS RIGHT RELEASE

ERROR CLEAR

ERROR LOG CLEAR

FILE NAME READ

SINGLE FILE READ

SINGLE FILE WRITE

MEMORY CARD FORMAT

FILE DELETE

VOLUME LABEL CREATE/DELETE

FILE COPY

FILE NAME CHANGE

FILE DATA CHECK

MEMORY AREA FILE TRANSFER

PARAMETER AREA FILE TRANSFER

PROGRAM AREA FILE TRANSFER
Force-setting/resetting bits

ERROR LOG READ

FORCED SET/RESET
FORCED SET/RESET CANCEL

0C
23

01
02

Refer to SYSMAC CS/CJ Series Communication Commands Reference Manual (W342) for information on FINS commands addressed to CS/CJ-series
PCs.

144

Section 6-3

Using FINS Message Communications
Commands Addressed to DeviceNet Units
Name

Command
code

Page

RESET

241

CONTROLLER DATA READ

241

CONTROLLER STATUS READ

242

ECHOBACK TEST

243

ERROR LOG READ

244

245

ERROR LOG CLEAR

Command to Send Explicit DeviceNet Messages
Name
EXPLICIT MESSAGE SEND

6-3

Command
code
28

Page
261

Using FINS Message Communications
There are two instructions that can be executed to send and receive data from
CS/CJ-series CPU Units: SEND(090) and RECV(098). There is another
instruction that can be executed to send any FINS command: CMND(490).

6-3-1

Setting Node Addresses
Set the nodes for FINS message communications to node addresses other
than 0. Node address 0 has a special meaning (local node) in message communications. If 0 is set as a node address for the Unit, message communications will not be possible.

6-3-2

Creating Routing Tables
The DeviceNet Unit functions as a Communications Unit in the same way as the
SYSMAC LINK Unit, Controller Link Unit, and Ethernet Unit.
It is therefore necessary to create routing tables for the communications functions to be used, as shown in the table below.

Mounted Units

Using master or slave
functions only

Using explicit
message
communications (not
supported across
networks)

Using FINS message
communications not
across networks

DeviceNet is the only Not necessary (See note 1.)
Communications
Unit mounted
Multiple DeviceNet
Units mounted as
Communications
Units

Not necessary (See
note 1.)

DeviceNet Unit and
other Communications Unit mounted
simultaneously

Local network table necessary (See note 2.)

Note

Local network table necessary (See note 2.)

Using FINS message
communications
across networks

Local network table
(See note 2.) and relay
network table are necessary.

1. If a local network table already exists in the CPU unit being used, the DeviceNet Unit must be registered in that table.
2. The DeviceNet Unit must be registered in the local network table.

145

Section 6-3

Using FINS Message Communications

3. In all cases other than the following two exceptions, a local network table
must be made, and the DeviceNet Unit must be registered in it.
a) When there is only one DeviceNet Unit.
b) When only multiple DeviceNet Units are mounted, with no remote I/O
communications.
4. A local network table is sometimes necessary even when the DeviceNet
Unit is not operating across networks.
5. If you prepare a local network table inside the CPU Unit, be sure to register
the DeviceNet Unit.
6. Even if a local network table exists inside the CPU Unit, the 7-segment display of the DeviceNet Unit may indicate “HC” and FINS message/explicit
message communications may not be possible unless the DeviceNet Unit
is registered in the local network table.

Routing Tables
The routing tables register the communications path from a Communications
Unit on the local PC, such as a DeviceNet Unit, Controller Link Unit, SYSMAC
LINK Unit, or Ethernet Unit, to the network to which the remote PC is connected. The routing tables are made up of two tables, the local network table
and the relay network table, as described below.
Local Network Tables

The local network table lists the unit numbers of the Communications Units
mounted to the PC and the addresses of the Networks to which each Unit
belongs. If multiple Communications Units are mounted to one PC CPU Unit,
the local network table is used to distinguish between network addresses.
The following type of table is used to show which Communications Unit data
must be sent through to reach a destination network address, when sending
data to a network address from one PC’s CPU Unit.
Local Network Address

CPU Bus Unit’s unit number

Local network: The address (1 to 127) of the network to which the Communications Unit belongs.
CPU Bus Unit’s unit number: The unit number of the CPU Bus Unit.
Example
Unit #00
Unit #01
Unit #02

Network address 1
Network address 2
Network address 3

Local Network Table
Address of local
network
1

146

CPU Bus Unit’s
unit number
00

Section 6-3

Using FINS Message Communications
Address of local
network

CPU Bus Unit’s
unit number

The unit number of the DeviceNet Unit as a CPU Bus Unit is the number set
on the rotary switches on the front panel (0 to 15). The network address is the
address of the Network to which the CPU Bus Unit is connected (1 to 127).
The network address is specified when this local network table for the routing
table is created.
Relay Network Tables

Relay network tables show the destination network (final network) and the
network and node address of the first relay point on the way to that network
(the first point to which communications are sent). The relay points are followed on the way to the final network.
Final Network Address

Relay Network Address

Relay Node Address

Final network address: The address of the final network (1 to 127).
Relay network address: The address of the network to which the first relay
point belongs (1 to 127).
Relay node address: The node address of the first relay point.
Procedure for Creating the Routing Table
Use the CX-Net function for creating/sending routing tables in the CX-Programmer, with the following procedure.
1. Select Start/Program/Omron/CX-Server/CX-Net Network Configuration Tool to start the CX-Net.
2. Select Edit/FINS Local from the Routing Table Menu. The following PC
Routing Table Window will appear.

3. Click on the Table View Tab. A table like that shown below will appear.

147

Section 6-3

Using FINS Message Communications

4. Use the left-side table to create the local network table. Input the unit numbers and corresponding local network addresses.
5. Use the right-side table to create the relay network table. Input the final network addresses and corresponding relay network addresses and relay
node addresses.
6. Save the finished routing table.
7. Go online, then load and send the routing table.
Note Use CX-Programmer Ver. 2.1 or later to register the DeviceNet Unit in the
routing tables. Actually, registration is possible using versions prior to CX-Programmer Ver. 2.0, but “DeviceNet” will not be displayed in the list of network
types when creating the routing tables with CX-Net. In this case, select one of
the network types that are displayed (CLK, SLK, etc.). This will enable the
DeviceNet to be registered in the routing table.

6-3-3

Data Send/Receive Instructions

NETWORK SEND: SEND(090)
Description

SEND(090) transfers data beginning at word S in the local PC to addresses
beginning at D at the designated node on the designated Network.

(192)
SEND

Control Data

Variations
↑ SEND

The control data depends on the destination. The following information is for
DeviceNet networks.
Word

148

No. of
words
(specified
in C)

...

Operands
S: 1st
source word
destination word
D: 1st
st
C: 1 control word

Destination node

Local node (source)

Ladder Symbol

Bits 00 to 07

Bits 08 to 15

Number of words: 1 to 267 words ($0001 to $010B)

C+1

Destination network address
(0 to 127, i.e., $01 to $7F, 0 = local
network)

Set to 0.

C+2

Destination unit address1

Destination node address2

Section 6-3

Using FINS Message Communications
Word

Note

Bits 00 to 07

Bits 08 to 15

C+3

Bits 00 to 03:
No. of retries (0 to 15,
i.e., $0 to $F)
Bits 04 to 07:
Set to 0.

Bits 08 to 10:
Transmission port number
($0 to $7)
Bit 11 to 14:
Set to 0.
Bit 15: ON: No response.
OFF: Response returned.

C+4

Response monitoring time ($0001 to $FFFF = 0.1 to 6553.5 seconds)3

1. Indicates a Unit as shown in the following table.
Unit

Setting

CPU Unit

User program in FA computer

CPU Bus Unit

$10 to $1F: Unit numbers 0 to 15
$FE: The local Unit

2. Values of $00 to $3F indicate nodes 0 to 63.
3. Designates the length of time that the PC retries transmission when bit 15
of C+3 is OFF and no response is received. The default value is $0000,
which indicates 2 seconds.

NETWORK RECEIVE: RECV(098)
Description

RECV(098) transfers data beginning at word S from the designated node on
the designated Network to addresses beginning at D at the local node.
Local node (destination)

Ladder Symbol
(098)
(@)RECV

↑ RECV(098)

No. of
words
(specified in C)

...

Control Data

Variations

...

Operands
source word
S: 1st
D: 1st
destination word
st
C: 1 control word

Source node

The control data depends on the source node. The following information is for
DeviceNet Networks.
Word

Bits 00 to 07

Bits 08 to 15

Number of words: 1 to 269, i.e., $0001 to $010D)

C+1

Source network address
(0 to 127, i.e., $00 to $7F, 0 = local
network)

Set to 0.

C+2

Source unit address1

Source node address2

C+3

Bits 00 to 03:
No. of retries (0 to 15 in
hexadecimal,
i.e., $0 to $F)
Bits 04 to 07:
Set to 0.

Bits 08 to 10:
Transmission port number
($0 to $7)
Bit 11 to 14:
Set to 0.
Bit 15: ON: No response.
OFF: Response returned.

C+4

Response monitoring time ($0001 to $FFFF = 0.1 to 6553.5 seconds)3

149

Section 6-3

Using FINS Message Communications
Note

1. Indicates a Unit as shown in the following table.
Unit

Setting

CPU Unit

User program in FA computer

CPU Bus Unit

$10 to $1F: Unit numbers 0 to 15
$FE: The local Unit

6-3-4

Sending FINS Commands

DELIVER COMMAND: CMND(490)
Description

CMND(490) can be used in the user program of the CS/CJ-series CPU Unit to
send FINS commands to read/write I/O memory, read status data, change the
operating mode, and perform other functions at other nodes.
CMND(490) transmits the command beginning at word S to the designated
Unit at the destination node address in the designated network, and receives
the response beginning at word D.
Local node (source)

Ladder Symbol
(490)
(@)CMND

Command

Variations

...

↑ CMND(490)

...

Operands
command word
response word
C: 1 control word

S: 1st
D: 1st
st

Destination node

Interpretation

Command
data

Response
Execution

...

150

Response
data

Section 6-3

Using FINS Message Communications
Word
C

Note

Bits 00 to 07

Bits 08 to 15

Number of command bytes to send: 0 to 542 (i.e., $0000 to $021E)

C+1

Number of response bytes to receive: 0 to 542 (i.e., $0000 to $021E)

C+2

Destination network address
(0 to 127, i.e., $00 to $7F, 0 = local
network)

Set to 0.

C+3

Destination unit FINS address1

Destination node address2

C+4

Bits 00 to 03:
No. of retries (0 to 15,
i.e., $0 to $F)
Bits 04 to 07:
Set to 0.

Bits 08 to 10:
Transmission port number
($0 to $7)
Bit 11 to 14:
Set to 0.
Bit 15: ON: No response.
OFF: Response returned.

C+5

Response monitoring time ($0001 to $FFFF = 0.1 to 6553.5 seconds)3

1. Indicates a Unit as shown in the following table.
Unit

Setting

CPU Unit

User program in FA computer

CPU Bus Unit

$10 to $1F: Unit numbers 0 to 15
$FE: The local Unit

2. Values of $00 to $3E indicate nodes 0 to 63.
3. Designates the length of time in (0.1-s units) that the PC retries transmission when bit 15 of C+3 is OFF and no response is received. The default
value is $0000, which indicates 2 seconds. If baud rate is slow and the response monitoring time is short, an error may occur.
Note Explicit messages can be sent to OMRON slaves and DeviceNet devices
made by other manufacturers by setting the FINS command code to 28 01.
When this is done, set the response monitoring time in C+5 to at least the
value set for the message monitoring timer (default: 2 s). If it is set to less than
the value for the message monitoring timer (default:2 s), communications may
be busy even if the next command is executed after the first one times out.

6-3-5

Using SEND(090), RECV(098), and CMND(490)
SEND(090), RECV(098), and CMND(490) instructions normally use an AND
of the Network Enabled Flag in the CPU Unit (A20200 to A2020007 corresponding to ports 0 to 7) and the Online Flag (word n+11, bit 00) (or the Message Communications Permitted Flag (word n+24, bit 12)) for the DeviceNet
Unit.
Note The Online Flag and the Message Communication Permitted Flag
perform the same operation.
Execution
condition

Network
Enabled Flag

Online Flag

SEND(090), RECV(098), or CMND(490)
word n+11, bit 00

151

Section 6-3

Using FINS Message Communications
Execution
condition

Network
Enabled Flag

Message
Communications
Permitted Flag
SEND(090), RECV(098), or CMND(490)

word n+24, bit 12

Communications Flags
Type

Name

Address
Word

Network Enabled Flag

A202

Network Error Flag

A219

Bit

7 6 5 4 3 2 1 0
Port 7
Port 6
Port 5
Port 4
Port 3
Port 2
Port 1
Port 0

CPU Unit

Content

0: Normal completion
1: Error

Port 7
Port 6
Port 5
Port 4
Port 3
Port 2
Port 1
Port 0

7 6 5 4 3 2 1 0

0: Execution not possible (executing)
1: Execution possible (not executing)

Communications Flag Operation
• The Network Enabled Flag turns OFF when instructions are being sent or
received (from when the instruction is issued until the response is
received) and turns ON when the execution has been completed, whether
normally or with an error.
• The Network Error Flag maintains its status until the next send or receive
is executed.
• The Network Error Flag turns OFF when the next communications
instruction is executed, regardless of whether the previous execution
ended with an error.
• The relationship between the Message Communications Permitted Flag
and the NS indicator and between the Message Communications Permitted Flag and the NS indicators on the front of the DeviceNet Unit is shown

152

Section 6-3

Using FINS Message Communications
in the following table.
Message
Communications
Permitted Flag
ON

OFF

Network Enabled Flag
Communications
instruction
Execution
Error Flag

Network status

NS
indicator

Communications connection made (network normal)

Lit green

Communications connection not made (network
normal, but communications not established)

Flashing
green

Non-fatal communications error (error in one or
more Slaves)

Flashing
red

Offline or power supply is OFF (no power supply,
resetting, minor failure, or send error)

Not lit

Fatal communications error

Lit red

1
0

Instruction
1 executed

Instruction
2 executed

Instruction
3 executed

1
0

Completion
code

Previous
code

00 Normal
end

04 Busy

00 Normal
end

Communications Instructions Completion Codes
The status at the completion of the execution of network communications
instructions is shown at the words indicated in the following table, as FINS
completion codes. During execution of the instructions the status will be 00 or
$0000 and this will be reflected at the end of the execution of the network
communications instruction.
Words
Port #0 to #7
Completion Codes
(A203 to A210)

Functions
A203 to A210 contain the completion codes for the results
of communications instruction execution for ports #0 to
#7, respectively.

Note For the CS/CJ-series, the completion codes are stored as 2 bytes of
data (1 word) upon completion of the execution of SEND(090),
RECV(098), and CMND(490). These codes are the same as the response codes for FINS commands. The first byte of the completion
code is placed in bits 08 to 15 and the second byte is placed in bits
00 to 07.
Timing of Reading Responses
Responses should be read on the rising edge (upward differentiation) of the
Network Enabled Flag, as shown in the following diagram.
Network Enabled
Flag
Processing to read response

Send/Receive Data Areas
The size of the data areas that can be used with SEND and RECV depends
on the PC that is being used. The following table shows the areas that can be
used for CS/CJ-series PCs.
Data Area

Range

CIO Area

CIO 0000 to CIO 6143

Work Area WR

W000 to W511

153

Section 6-3

Using FINS Message Communications
Data Area

Note

Range

Holding Area

H000 to H511

Auxiliary Area

A000 to A959 (*3)

Timer Area

T0000 to T4095

Counter Area

C0000 to C4095

DM Area

D00000 to D32767

EM Area

E00000 to E32767 (*2)

1. A000 to A477 in the Auxiliary Area are write-protected.
2. There can be up to 13 banks of EM Memory. Refer to the operation manual
for the CPU Unit for information on whether it has EM Memory and how
many banks can be used.
3. Do not exceed the boundary of the data areas for the PC you are using.

Programming Examples
Example 1: Sending Data Using SEND
CS/CJ-series DeviceNet Unit No. 0

CPU CS/CJ-series
Unit PC
Node 05

Network 01

CS/CJ-series
DeviceNet Unit
CPU
Unit

CS/CJ-series
PC
Unit address: 00

Node 06

SEND

Operation
• The data from the 5 words D01000 to D01004 from the PC with DeviceNet Unit 1 with node address 05 are sent to D03000 to D03004 in
the PC with DeviceNet Unit 2 with node address 06.
• The completion code is stored in D00006 when execution of SEND
has been completed.
Command Details
The following command is used: [SEND S
S = D01000:
D = D03000:
C = D00000:

First source word at local (source) node
First destination word at destination node
First control word; settings are given below (Hex).

D00000 = 0005:
D00001 = 0001:
D00002 = 0600:
D00003 = 0000:
D00004 = 0064:

154

Number of words to send
Destination network address
Destination node address (06)
Destination unit address (00 = CPU Unit)
Response, communications port 0, no retries
Response monitoring time

Section 6-3

Using FINS Message Communications
Program Example
A202
11

(071)
BSET

#1234

D01000

D01004

Sets 1234 in D01000 to D01004.

(021)
MOV

#0005

D00000

(021)
MOV

#0001

D00001

Places data into control data words to specify the 5
words to be transmitted to the CPU Unit of node 06 of
network 01, through port 0, with response, 0 retries,
and a response monitoring time of 10.0 seconds.

(021)
MOV

#0600

D00002

(021)
MOV

#0000

D00003

(021)
MOV

#0064

D00004

(021)
MOV

#0001

0000

D03000

D00000

First Scan Flag

Execution
condition
000
A202
00
00

1511
00

(090)
SEND

D01000

Network Online Flag
Enabled (Word n+11,
bit 00)
Flag

0000
01

A202
00

Network
Enabled
Flag

A202
08

Network
Execution
Error Flag

(025)
ASL

(021)
MOV

A503
(061)
ASR

0000

D00006

0000

Places 0001 into CIO 0000

Transfers 5 words of data from D01000 to D01004 from
the PC of node 05 to D03000 to D03004 in the PC of
node 06.
Shifts the contents of CIO 0000 one bit to the left.

Stores the completion code in A203 to D00006.
Shifts the contents of CIO 0000 one bit to the right and
retries the next cycle (CIO 000000 ON).

(001)
END

155

Section 6-3

Using FINS Message Communications
Example 2: Sending a FINS Command Using CMND
CS/CJ-series
DeviceNet Unit No. 0

CMND

CS/CJ-series
DeviceNet Unit

CPU
Unit
Node 05

CPU
Unit

Unit address: 00

Node 06

Network 01

MEMORY AREA READ command

Operation
• The PC with DeviceNet Unit 1 with node address 5 reads the data from
the 5 words D01000 to D01004 from the PC with DeviceNet Unit 2 with
node address 06.
• The MEMORY AREA READ command (01 01) is used to read variable
data.
• Command data is written starting from D01000 in the PC with DeviceNet Unit 1 with node address 5 and the response data is written
starting from D02000.
• The completion code is stored in D00006 when execution of SEND
has been completed.
Command Details
The following command is used: [CMND S

S = D01000:
First command word at local node
Settings (Hex)
D01000 = 0101:
Command Code
D01001 = 8203:
Command parameters
D01002 = E800:
Command parameters
D01003 = 0005:
Command parameters
D = D02000:
First response word at local node
C = D00000:
First control word
Settings (Hex).
D00000 = 0008:
D00001 = 000E:
D00002 = 0001:
D00003 = 0600:
D00004 = 0000:
D00005 = 0064:

156

Number of command bytes
Number of response bytes
Destination network address
Destination node address (06)
Destination unit address (00 = CPU Unit)
Response, communications port 0, no retries
Response monitoring time

Section 6-3

Using FINS Message Communications
Example Program
A500
15

(071)
BSET

#0000

D00000

D02999

Sets 0000 in D00000 to D02999.

First Scan Flag

Execution
condition
0000 A202
00
00

15110
00

(021)
MOV

#0008

D00000

(021)
MOV

#000E

D00001

(021)
MOV

#0001

D00002

(021)
MOV

#0600

D00003

(021)
MOV

#0000

D00004

(021)
MOV

#0064

D00005

(021)
MOV

#0101

D01000

(021)
MOV

#8203

D01001

(021)
MOV

#E800

D01002

(021)
MOV

#0005

D01003

(021)
MOV

#0001

(490)
CMND D01000

Online Flag
Port
Enabled (word n+11,
bit 00)
Flag

0000
01

A202
00

Port
Enabled
Flag

D02000
(025)
ASL

A219
00

(021)
MOV

Port
Execution
Error Flag

A203
(026)
ASR

0000

D00000

0000

D00006

0000

Place data into control data words to specify to read
5 words D01000 to D01004 from the PC of node 06
and network 01 to the PC of node 05.

Place the command data for MEMORY AREA READ
into D01000 to D01003.

Places 0001 into CIO 0000

Reads 5 words D01000 to D01004 from the PC of node
06 and network 01 to the PC of node 05 and stored the
data beginning at D02000.
Shifts the contents of CIO 0000 one bit to the left.

Stores the network error response code in A203 to
D00006.
Shifts the contents of CIO 0000 one bit to the right to
reset CIO 000000.

(001)
END

6-3-6

Connecting Networks for FINS Communications
CS/CJ-series DeviceNet Units can perform FINS communications between
networks. DeviceNet networks are handled the same way as other FA networks such as Controller Link or SYSMAC LINK, and the OA network Ethernet.
DeviceNet networks can be connected to the other DeviceNet networks or to
other types of networks.
Note Explicit message communications cannot be performed between networks.

157

Section 6-4

Sending Explicit Messages
Up to 3 levels of networks, including DeviceNet, are possible.
Controller Link Unit
Controller Link Unit
CS/CJ-series DeviceNet Unit
CS/CJ-series CPU Unit

Remote I/O communications
DeviceNet
Controller Link

CS/CJ-series DeviceNet Unit

DeviceNet

CS/CJ-series
DeviceNet Unit

When connecting networks, routing tables must be registered for the PC CPU
Units on all networks.
When connecting two or more communication units (including the DeviceNet
Unit) to a CS/CJ-series CPU Unit, the DeviceNet Unit must be registered in
the CS/CJ-series PC CPU Unit routing table (for the local network table only).
Commands cannot be executed if the DeviceNet Unit is not registered.

6-4

Sending Explicit Messages
CS/CJ-series DeviceNet Units can send explicit messages. FINS command
headers are attached to explicit messages and sent. Explicit messages can
be sent to the following destinations.
• Masters or slaves made by other manufacturers
• Other PCs with a CS/CJ-series DeviceNet Unit.
• PCs (Slaves) with C200H I/O Link Units (See note).
Note Only reading and writing I/O memory is possible for PCs with C200H
I/O Link Units. Status reading/writing is not possible.
Example
CS/CJ-series DeviceNet Unit
CS/CJ-series CPU Unit

Other manufacturer master or slave
or
CS/CJ-series DeviceNet Unit

Explicit messages can be sent
FINS header
Explicit message

DeviceNet
C200H I/O Link Unit
C200HX/HG/HE or
CS/CJ-series
CPU Unit (Slave)
Note: Only I/O memory
read/write possible

158

Section 6-4

Sending Explicit Messages

6-4-1

Sending Explicit Messages
The FINS command code 28 01 can be used to send explicit DeviceNet messages to OMRON slaves and DeviceNet devices made by other manufacturers. The use of explicit messages is illustrated in the following diagram.
Slave or Master
by other
manufacturer

DeviceNet De
viceNet Unit

CPU Unit
Explicit
message

FINS
header

CMND
(490)

DeviceNet
network

Use 28 01 for the
FINS command code.
FINS
header

Response

Explicit
message

FINS
header

Response

The local DeviceNet Unit is specified as the destination in the communications instruction in the PC’s user program (not the OMRON Special Slave or
DeviceNet device made by another manufacturer), and the node address of
the actual destination (i.e., the Slave or Master made by another manufacturer) is specified in the command data for the explicit message send command.
FINS command
CMND
Control data in C+3
Destination node address:
Destination unit address:

Local node address
Unit No. of DeviceNet Unit +10 ( Hex)

PC's
CPU Unit

Explicit message
Slave or Master
not by OMRON

159

Section 6-4

Sending Explicit Messages

The following diagram shows an example of actual node address specifications.
Machine No. of DeviceNet Unit: 2
The node address of the non-OMRON node is set as the
destination node address in the FINS command data.

CMND
S
D
C

PC's
CPU
Unit

8 7
2
0

S
S+1

8
6

0
0

Command code

Node 05
Explicit command block
Node address of the nonOMRON node: 06 Hex
15
C+3

8 7
0

0
F

Explicit message
Destination node address: Destination unit address:
Local node address: 05
FE or 12 ( Hex)

Node 06
(Slave or Master not
by OMRON)

Note Depending on conditions, the destination slave may not always accept an
explicit message. Always perform retry processing when sending explicit messages.

FINS Command: EXPLICIT MESSAGE SEND (28 01)
EXPLICIT MESSAGE SEND will send an explicit DeviceNet message to the
specified class and receive a response.
Command Block
28

Command
code

534 bytes max.
Class ID
Service code

Instance ID

Service data

Destination node address

Response Block
Normal Response
28

534 bytes max.

Command Response No. of bytes
code
code
received

Service data
Service code

Destination node address (remote node)

Error Responses
The following response is returned if an error occurs for the explicit message.
28

Command Response No. of bytes
code
code
received

Error code
Service code 94 (Hex)

Destination node address (remote node)

The following response is returned if the explicit message cannot be sent or
times out.

160

Section 6-4

Sending Explicit Messages
28

Command
code

Parameters

Response
code

Destination node address (command): The node address of the destination
of the explicit message. (The node address of the local DeviceNet Unit is
specified in the control data for the CMND(490) or IOWR instruction, but the
node address of the actual destination is specified here in the FINS command.)
Service code (command, response): A service code defined for DeviceNet.
In a normal response, bit 15 of the service code specified in the command will
be turned ON and returned. In an error response, 94 Hex will always be
returned.
Class ID (command): The class ID of the destination of the explicit message.
Instance ID (command): The instance ID of the destination of the explicit
message.
Service data (command, response): The data defined for the services
codes.
No. of bytes received (response): The number of bytes received from the
destination node address (remote node).
Destination node address (remote node): The node address of the
OMRON Special I/O Slave Unit or Slave manufactured by another company to
which the explicit message was sent is returned.
Error code (response): An error code defined by DeviceNet.
Note

1. This command sends a DeviceNet-defined explicit message to an OMRON
Special I/O Slave Unit or a Slave manufactured by another company and
receives a response.
2. Unlike other FINS commands, this command is addressed to the local DeviceNet Unit. The actual destination of the explicit message is given in the
command data, as described above.
3. If the DeviceNet Unit receives an explicit message, it will automatically return a response.
4. Refer to the DeviceNet Specification for details on parameters for explicit
messages.
5. Contact the Open DeviceNet Vendor Association, Inc. (ODVA) at 8222
Wiles Road, Suite 287, Coral Springs, FL 33067 USA (phone: 954-3405412, fax: 954-340-5413, e-mail: billmoss@ix.netcom.com, Home page:
http://www.odva.org/) to obtain copies of the specification.
6. For details on explicit messages to OMRON Special I/O Slaves, refer to the
CompoBus/D (DeviceNet) Slaves Operation Manual (W347).

6-4-2

Sending Explicit Messages Using CMND(490)
CMND(490) can be used in the CPU Unit ladder program of the CS/CJ-series
DeviceNet Unit to send explicit messages.
FINS command headers are attached to the explicit messages and sent.
After the FINS command header and the FINS completion code are sent, the
explicit message response is received.
The following command is used: [ CMND

S: First command word

161

Section 6-4

Sending Explicit Messages
D: First response word
C: First control data word

Command data is set in order starting with the word specified for the
CMND(490) operand S (first command word) and continuing with words with
higher addresses in I/O memory in the command block format.
Command Format Example: Writing Error Clear Codes to the CPU Unit
Set in this order starting from the word specified for the
CMND(490) operand S (first command word) and
continuing with words with higher addresses.
28

FE FF

Command
code

Service
Instance ID
Code
Service Data
Class ID
Destination
node address

Method for Setting Data from CMND(490) Operand S
Bit
FINS command code
Node address, Service Code
Class ID
Instance ID
Service Data
Service Data

In the same way, response data is set from the starting with the word specified
for CMND(490) operand D (first response word) and continuing with words
with higher addresses in I/O memory in the response block format.
Note Service data that is in word (2-byte) or double-word (4-byte) units, such as
word data and ERROR CLEAR codes, is specified from low to high (U) bytes
in command block format. For example, to specify word data $1234, specify
$34 and then $12. To specify $12345678, specify $78 to $56 to $34 to $12.
The command blocks are shown in the following diagram.

162

Section 6-4

Sending Explicit Messages
Command Block
Eg. For $1234

Eg. For $15678234

Service Data

The format from CMND(490) operand S onwards will be set as follows:
Example: $1234

Example: $12345678

From higher byte

From higher byte
Bit

Bit

From lower byte
Bit

The response format data in service data that is in word (2-byte) or doubleword (4-byte) units, such as word data and ERROR CLEAR codes, is also
specified from low to high bytes in response block format
Example: Sending Explicit Messages Using CMND(490)
DeviceNet Unit No. 0
CMND(490)
instruction

PC's
CPU
Unit
Node address 05
Unit address FE Hex or 10 Hex

Explicit message

Slave node 11

Operation

The vendor code is read from a Slave (OMRON vendor code: 002F Hex)
using the EXPLICIT MESSAGE SEND command, 28 01. The command data
is written starting at DM01000, and the response data is stored starting at
D02000. When execution of CMND(490) has been completed, the completion
code is stored in D00006 and the instruction is executed again.

Command Details

The following command is used: [ CMND
S = D01000:

First command word at local node

Settings (Hex)
D01000 = 2801:
D01001 = 0B0E:
D01002 = 0001:
D01003 = 0001:
D01004 = 0100:
D = D02000:
C = D00000:

Command Code
Slave node address: 11
Service code: 0E
Class ID: 0001
Instance ID: 0001
Attribute ID: 01

First response word at local node
First control word

163

Section 6-4

Sending Explicit Messages
Settings (Hex).
D00000 = 0009:
D00001 = 000A:
D00002 = 0001:
D00003 = 05FE:
D00004 = 0000:
D00005 = 0064:
Response

164

Number of command bytes
Number of response bytes
Destination network address: 1
Destination node address: 05
Destination unit address: FE (or 10)
Response, communications port 0, no retries
Response monitoring time

D02000 = 2801
D02001 = 0000
D02002 = 0004
D02003 = 0B8E:Response source node address 11: 0B Hex
Normal completion 8E Hex
D02004= 2F00: Vendor code stored from high to low byte

Section 6-5

Receiving Explicit Messages
Program Example
A200
11

(071)
BSET

#0000

D00000

D02999

Sets 0000 in D00000 to D02999.

First Scan Flag

Execution
condition
0000 A202
00
00

1511
00

(021)
MOV

#0009

D00000

(021)
MOV

#000A

D00001

(021)
MOV

#0001

D00002

(021)
MOV

#05FE

D00003

(021)
MOV

#0000

D00004

(021)
MOV

#0064

D00005

(021)
MOV

#2801

D01000

(021)
MOV

#0B0E

D01001

(021)
MOV

#0001

D01002

(021)
MOV

#0001

D01003

(021)
MOV

#0100

D01004

(021)
MOV

#0001

0000

D02000

D00000

(490)
CMND D01000

Message
Port
Enabled Communications
Flag
Permitted
Flag
0000
01

A202
00

Port
Enabled
Flag

A219
00

Port
Execution
Error Flag

(025)
ASL

(021)
MOV

A203
(026)
ASR

Place data into control data words to specify sending
9 bytes to node 05 (unit FE) on network 01 and to
receive 10 bytes in return.

0000

D00006

0000

Place the command data for EXPLICIT MESSAGE
SEND into D01000 to D01004.

Places 0001 into CIO 0000

Sends 9 bytes of command data to node 05 (unit FE) on
network 01 and receives 10 bytes of response data and
stores it in D02000.
Shifts the contents of CIO 0000 one bit to the left.

Stores the completion code in A203 to D00006.
Shifts the contents of CIO 0000 one bit to the right and
retry at next cycle (CIO 000000 ON).

(001)
END

6-5

Receiving Explicit Messages
This CS/CJ-series DeviceNet Unit contains a PLC Object. The Unit will
receive messages addressed to the PLC Object, process service requests
addressed to the CPU Unit, and return responses.
The following services are provided by the PLC Object.
• CPU Unit status read/write
• CPU Unit I/O memory read/write
The explicit messages can be received from the following sources:
• Masters made by other manufacturers
• PCs with C200H-series DeviceNet Master Units (C200HW-DRM21-V1)

165

Section 6-5

Receiving Explicit Messages

• PCs with CVM1/CV-series DeviceNet Master Units (CVM1-DRM21-V1)
• PCs with CS/CJ-series DeviceNet Units
Example
CS/CJ-series
C200H-series
DeviceNet Unit
DeviceNet Master Unit C200HX/HG/HE
CPU Unit
CS/CJ-series CPU Unit
Other manufacturer master
Explicit messages can
be received
Explicit message

DeviceNet

Note Status and the I/O memory read/write operations cannot be performed for
PCs with a C200H-series or CVM1/CV-series DeviceNet Master Units. The
CPU Unit of a CS/CJ-series DeviceNet Unit can also send an explicit message to read/write I/O memory of PCs with C200H I/O Link Units.

6-5-1

List of PLC Object Services
PLC Objects provide the following services.

Status Read/Write for CPU Units
Services
CPU Unit Information Read

CPU Unit Write

CPU Unit Status
Read

166

Service
code
0E Hex

10 Hex

40 Hex

Class ID
2F Hex

Instance ID
00 Hex

Request
service data

Contents

Attribute ID =
64 Hex

Reads the operating mode of the
CPU Unit.

Attribute ID =
65 Hex

Reads if there is a fatal or non-fatal
error in the CPU Unit.

Attribute ID =
66 Hex

Reads CPU Unit model.

Attribute ID =
64 Hex,
Attribute Value

Changes the operating mode of the
CPU Unit.

Attribute ID =
65 Hex
Attribute Value

Clears errors.

None

Reads the detailed status of the CPU
Unit.
Operation status: Stop, run, CPU
standby
Operating modes: PROGRAM, MONITOR, RUN
Fatal error information: Error flags,
including memory errors, I/O bus
errors, system errors
Messages: Message No. when MSB
instruction executed by CPU Unit
Error codes: Error code for the most
serious errors
Error messages: Messages stored in
CPU Unit when FAL/FALS instruction
executed

Section 6-5

Receiving Explicit Messages
I/O Memory Read/Write for CPU Units
Service

Service
code

Byte Data Read IC Hex

Class ID

2F Hex

Instance ID

Specifies
area (01 Hex
to 14 Hex)

Request
service
data

Contents

Address, No. Reads the specified node data in byte units.
of read bytes The word data is read in order, from high to
low bytes.
Read data: 200 bytes max.

Word Data
Read

ID Hex

Address, No. Reads the specified node data in word
units. The word data is read in order, from
of read
high to low bytes.
words
Read data: 200 bytes max.

Byte Data Write

IE Hex

Address,
word data

Writes the specified node data in byte units.
The word data is specified in order, from
high to low bytes.
Write data: 200 bytes max.

Word Data Write IF Hex

Address
word data

Writes the specified node data in word
units. The word data is specified in order,
from high to low bytes.
Write data: 200 bytes max.

The commands and responses for the explicit messages that can be sent and
received are described on the following pages.
Note In the following command and response formats, all boxes represents 1 byte.

167

Section 6-5

Receiving Explicit Messages
CPU Information Read (Service Code: 0E Hex)

Reads CPU Unit information, including operating mode, fatal/non-fatal errors,
and the CPU Unit model.
Command Block

Attribute ID

Class ID
Service code

Instance ID

Destination
node address

Response Block

Service Code
Attribute Value
Destination
node address
No. of bytes
received

Parameters

Destination node address (command): The node address of the CS/CJseries DeviceNet Unit from which to read the data, specified in 1-byte (2 digit)
hexadecimal.
Service code (command, response): 0E Hex is specified for commands.
For responses, the highest bit be ON and 8E Hex will be returned.
Class ID (command): Always 002F Hex.
Instance ID (command): Always 0000 Hex.
Attribute ID (command): The read information is specified by the attribute ID.
The attribute IDs are listed in the following table.
Attribute ID (Hex)
64

Contents
CPU Unit operating mode

Attribute value size
1 word (2 bytes)

CPU Unit errors

1 word (2 bytes)

CPU Unit model

22 bytes

• CPU Operating Mode (when Attribute ID = 64 Hex)
Reads the CPU Unit operating mode.
• CPU Unit Errors (when Attribute ID = 65 Hex)
Reads if there are any fatal or non-fatal errors in the CPU Unit.
• CPU Unit Model (when Attribute ID = 66 Hex)
Reads the CPU Unit model.
No. of bytes received (response): The number of bytes received from the
destination node address (remote node) onwards is returned in hexadecimal.
Destination node address (response): The node address of the CS/CJseries DeviceNet Unit that returned the response is returned in hexadecimal.

168

Section 6-5

Receiving Explicit Messages

Read data (response): The specified information is returned in order.
• CPU Unit operating mode (attribute ID = 64 Hex).
The CPU Unit operating mode is returned in 1-word (2-byte) hexadecimal format, as follows:
0001 Hex: PROGRAM mode; 0002 Hex: MONITOR mode;
0004 Hex: RUN mode

PROGRAM mode
MONITOR mode
RUN mode

Note The codes for the above modes are 1-word (2-byte) data and are returned in
low byte first. For example, for PROGRAM mode, the code is returned as 01
Hex followed by 00 Hex.
• CPU Unit Errors (when Attribute ID = 65 Hex)
The CPU Unit fatal/non-fatal error data is returned in 1-word (2-byte) hexadecimal format, as follows:
01 Hex: Error; 00 Hex: No error.

1: Error

• CPU Unit Model (when Attribute ID = 65 Hex)
The CPU Unit model is returned in ASCII.
Size: 2 bytes (Always 1400 Hex) + Model: 20 bytes (fixed). Unused area is
filled with 20 Hex (spaces) and returned.
20 bytes
Byte Byte

Byte Byte Byte
Unit name

CPU Unit Write (Service Code: 10 Hex)
This PLC Object service writes CPU Unit information, including the operating
mode and clearing errors.
Command Block

Class ID

Attribute ID

Service Code
Destination node address

Attribute Value
Instance ID

169

Section 6-5

Receiving Explicit Messages
Response Block

Service Code

Destination node address
No. of bytes received

Parameters

Destination node address (command): The node address of the CS/CJseries DeviceNet Unit to which to write data, specified in 1-byte (2 digit) hexadecimal.
Service code (command, response): 10 Hex is specified for commands. For
responses, the highest bit will turn ON and 90E Hex will be returned.
Class ID (command): Always 002F Hex.
Instance ID (command): Always 0000 Hex.
Attribute ID (command): Information to write is specified by the attribute ID.
The attribute IDs are listed in the following table.
Attribute ID (Hex)

Contents

Attribute value size

CPU Unit operating mode

1 word (2 bytes)

CPU Unit errors

1 word (2 bytes)

• CPU Operating Mode (Attribute ID = 64 Hex)
Changes the CPU Unit operating mode.
The Attribute Values are as follows:
0001 Hex: PROGRAM mode; 0002 Hex: MONITOR mode;
0004 Hex: RUN mode
Note The specified code for the above operating modes are 1-word (2-byte
data, and are specified with the low byte first. For example, for PROGRAM mode, the code is specified as 01 Hex followed by 00 Hex. Accordingly, the low to high bytes for the above codes are set as high
to low bytes in I/O memory, when setting the codes as data for operand S of CMND(490).
• Clearing CPU Unit Errors (when Attribute ID = 65 Hex)
Clears any fatal or non-fatal errors in the CPU Unit. Sets the error clear
code to Attribute Value. The error clear codes are listed in the following
table.
Error code
(Hex)

170

Data cleared

FFFE

Current error (clears the highest priority error)

0008B

Interrupt task error

009A

Basic I/O error

009B

PC Setup error

02F0

Inner Board non-fatal error

0300 to 035F

Special I/O Unit error

00A0 to 00A1

SYSMAC BUS error

0500 to 055F

Special I/O Unit settings error

00E7

I/O verification error
When registered and actual I/O tables are different
When disconnecting or connecting I/O Units

Section 6-5

Receiving Explicit Messages
Error code
(Hex)

Data cleared

00F7

Battery error

0200 to 020F

CS/CJ-series CPU Bus Unit error (last 2 digits are binary code for
the Unit No.)
For parity errors generated when data transferred between CS/CJseries CPU Bus Unit and CPU Unit
For watchdog timer errors in CS/CJ-series CPU Bus Unit

0400 to 040F

CPU Bus settings error (last 2 digits are binary code for the Unit
No.)
System error (FAL): FAL instruction executed

4101 to 42FF

Note Error clear codes are 1-word (2-byte) data, so the above codes are
specified with the low byte first. The low to high bytes for the above
codes are set as high to low bytes in I/O memory, when setting the
codes as data for operand S of CMND(490). For example, to specify
battery error 00F7 Hex, specify the error code as F7 Hex followed by
00 Hex, as shown in the following diagram.

Command Block

Destination
node
address

Class ID

Attribute ID
Attribute Value
Instance ID

Service Code

The settings for operand S and following words for CMND(490) are shown in
the following diagram.
Data set for CMND(490)
Bit
FINS command code
Node address, Service Code
Class ID
Instance ID
Attribute ID, Attribute Value

In this case, error code 00F7 is set from
the high to the low byte.

No. of bytes received (response): The number of bytes received from the
destination node address (remote node) is returned in hexadecimal.
Destination node address (response): The node address of the CS/CJseries DeviceNet Unit from which the response was sent is returned in hexadecimal.

171

Section 6-5

Receiving Explicit Messages
CPU Unit Status Read (Service Code: 40 Hex)

This PLC Object service reads status details (operation status, operating
mode, fatal and non-fatal errors, etc.) from the CPU Unit.
Command Block

Class ID
Service Code
Instance ID

Destination node address

Response Block

Service Code
Detailed status
Destination
node address
No. of bytes
received

Parameters

Destination node address (command): The node address of the CS/CJseries DeviceNet Unit from which to read data, specified in 1-byte (2 digit)
hexadecimal.
Service code (command, response): 40 Hex is specified for commands. For
responses, the highest bit will turn ON and C0 Hex will be returned.
Class ID (command): Always 002F Hex.
Instance ID (command): Always 0000 Hex.
No. of bytes received (response): The number of bytes received from the
destination node address (remote node) is returned in hexadecimal.
Destination node address (response): The node address of the CS/CJseries DeviceNet Unit that returned the response is returned in hexadecimal.
Read data (response): The read data is given in the following table. The data
is returned after the service code in the order shown in the table (high to low).
Operation Status
RUN mode
Fatal error information (L)
Fatal error information (H)
Non-fatal error information (L)
Non-fatal error information (H)
Message exists/does not exist (L)
Message exists/does not exist (H)
Error code (L)
Error code (H)
Error message (16 bytes)

172

Section 6-5

Receiving Explicit Messages

• Operation status: Returns the operation status of the CPU Unit in 1-byte
(2-digit) hexadecimal.
• Operating mode: Returns the operating mode of the CPU Unit in 1-byte
(2-digit) hexadecimal.
0001 Hex: PROGRAM mode; 0002 Hex: MONITOR mode;
0004 Hex: RUN mode
• Fatal error information: Returns the fatal error information for the CPU
Unit in 2 bytes (low to high).

1: System error (FALS)
1: Cycle time over
1: Program error
1: I/O setting error
1: No. of I/O points exceeded
1: Inner Board fatal error
1: Number duplicate use error
1: I/O Bus error
1: Memory error

• Non-fatal error information: Returns the non-fatal error information for
the CPU Unit in 2 bytes (low to high).

Unspecified (reserved for system use)
1: Special I/O Unit error
1: CPU Bus settings error
1: Battery error
1: SYSMAC BUS error
1: Special I/O Unit
1: CS1-series CPU Bus Unit error
1: Inner Board error
1: I/O verification error
1: PC system error
1: Unspecified (reserved for system use)
1: Basic I/O Unit error
1: Interrupt task error
1: Unspecified (reserved for system use)
1: System error (FAL)

173

Section 6-5

Receiving Explicit Messages

• Message Exists/Does Not Exist: When the MSG instruction is executed
by the CPU Unit, the bit corresponding to the message number will turn
ON and be returned in 2 bytes (from low to high bytes).

Message No. 0 (1: exists; 0: does not exist)
Message No. 1 (1: exists; 0: does not exist)
Message No. 2 (1: exists; 0: does not exist)
Message No. 3 (1: exists; 0: does not exist)
Message No. 4 (1: exists; 0: does not exist)
Message No. 5 (1: exists; 0: does not exist)
Message No. 6 (1: exists; 0: does not exist)
Message No. 7 (1: exists; 0: does not exist)

• Error Code: The highest priority error code of the errors existing when
the command is executed will be returned in 2-byte decimal (from low to
high bytes). If there are no errors, the error code will be 0000.
Note For information on the severity of error codes, refer to the CS1 Series
CPU Unit Operation Manual (W339) or the CJ Series CPU Unit Operation Manual (W393).
• Error Messages: If the above error codes have occurred when FAL/FALS
instructions are executed with registered messages, those messages are
returned in 16-byte ASCII. If there are no registered messages or if the
error codes have not occurred due to execution of FAL/FALS instructions,
the code is returned in ASCII with 20 Hex (space) in 16 bytes.

Byte Data Read (Service Code: 1C Hex)
Byte Data Read reads any I/O memory area data in a CPU Unit with a CS/CJseries DeviceNet Unit mounted. The read word data is in byte units. The
response block is returned from high to low bytes.
Command Block

Class ID

Address L
Address H

Service Code
Destination node address

174

Instance ID

No. of bytes read

Section 6-5

Receiving Explicit Messages
Response Block

Service
Code

Word data L

Word data H

Destination
node address
No. of bytes
received

Parameters

Read data (200 bytes max.)

CPU Unit memory area
for read

Word range

CIO

0000 to 6143

D00000 to D32767

W000 to W511

H000 to H511

08 to 14

EM, banks 0 to C

En_00000 to En_32767
(n: 0 to C)

Address L, Address H (command): The address of the first word from which
to read the data is specified in hexadecimal as shown below.
Address L: The lower 2 digits when the first word address is given in 4-digit
hexadecimal.
Address H: The higher 2 digits when the first word address is given in 4-digit
hexadecimal.
No of Read Bytes (command): The number of bytes of read data is specified
in 1-byte (2-digit) hexadecimal. The range is 01 to C8 Hex (1 to 200 decimal).
No. of bytes received (response): The number of bytes received from the
destination node address (remote node) is returned in hexadecimal.
Destination node address (response): The node address of the CS/CJseries DeviceNet Unit that returned the response is returned in hexadecimal.
Read data (response): The specified area, word, and byte data is returned in
order from word H (high byte: bits 8 to 15) to word L (low byte: bits 0 to 7). If
an odd number is specified for the number of read bytes, the last 1 byte of
data will be read to the high word.
Important Points

The actual address L, address H, and number of read bytes that can be specified depends on the model of the CPU Unit of the CS/CJ-series DeviceNet
Unit and the type of memory area. Do not exceed the boundary of the data
areas for the PC you are using.

175

Section 6-5

Receiving Explicit Messages
Word Data Read (Service Code: 1D Hex)

Word Data Read reads I/O memory area data in CPU Units with a CS/CJseries DeviceNet Units. The read word data is in word units. The response
block is returned from low to high bytes.
Command Block

Address L

Class ID

Address H

Service Code
Instance ID

Destination node address

No. of words
read

Response Block

Service
Code

Word data H

Word data L

Destination
node address
Read data (200 bytes max.)

No. of bytes
received

Parameters

Destination node address (command): The node address of the CS/CJseries DeviceNet Unit that reads the data, specified in 1-byte (2 digit) hexadecimal.
Service code (command, response): ID Hex is specified for commands. For
responses, the highest bit will turn ON and 9D Hex will be returned.
Class ID (command): Always 002F Hex.
Instance ID (command): The type of memory area that will read the data is
specified in hexadecimal as shown in the following table.
Instance ID (Hex)

CPU Unit memory area
for read

Word range

CIO

0000 to 6143

D00000 to D32767

W000 to W511

H000 to H511

08 to 14

EM, banks 0 to C

En_00000 to En_32767
(n: 0 to C)

Address L, Address H (command): The address of the first word to read the
data from is specified in hexadecimal as shown below.
Address L: The lower 2 digits when the first word address is given in 4-digit
hexadecimal.
Address H: The higher 2 digits when the first word address is given in 4-digit
hexadecimal.

176

Section 6-5

Receiving Explicit Messages

No of Read Words (command): The number of words of read data is specified in 1-byte (2-digit) hexadecimal. The range is 01 to 64 Hex (1 to 100 decimal).
No. of bytes received (response): The number of bytes received from the
destination node address (remote node) is returned in hexadecimal.
Destination node address (response): The node address of the CS/CJseries DeviceNet Unit that returned the response is returned in hexadecimal.
Read data (response): The specified area, word, and byte data is returned in
order from word L (low byte: bits 0 to 7) to word H (high byte: bits 8 to 15).
Important Points

The actual address L, address H, and number of write data bytes that can be
specified depends on the CPU Unit of the CS/CJ-series DeviceNet Unit and
the Memory Area. Do not exceed the boundary of the data areas for the PC
you are using.

Byte Data Write (Service Code: 1E Hex)
Byte Data Write writes data to I/O memory area in CPU Units with CS/CJseries DeviceNet Units mounted. The write word data is in byte units. The
command block is specified from high to low bytes, as shown in the following
diagram.
Command Block

Word data H

Class ID

Word data H

Instance ID
Service Code
Address L
Destination node address

Word data L

Address H
Write data (200 bytes max.)

Response Block

Service Code

Destination
node address
No. of bytes
received

Parameters

Destination node address (command): The node address of the CS/CJseries DeviceNet Unit to which to write the data, specified in 1-byte (2 digit)
hexadecimal.
Service code (command, response): IE Hex is specified for commands. For
responses, the highest bit will turn ON and 9E Hex will be returned.
Class ID (command): Always 002F Hex.

177

Section 6-5

Receiving Explicit Messages

Instance ID (command): The type of memory area to which the data will be
written is specified in hexadecimal as shown in the following table.
Instance ID (Hex)

CPU Unit memory area
for write

Word range

CIO

0000 to 6143

D00000 to D32767

W000 to W511

H000 to H511

08 to 14

EM, banks 0 to C

En_00000 to En_32767
(n: 0 to C)

Address L, Address H (command): The address of the first word to which
the data will be written is specified in hexadecimal as shown below.
Address L: The lower 2 digits when the first word address is displayed in 4digit hexadecimal.
Address H: The higher 2 digits when the first word address is displayed in 4digit hexadecimal.
Write data (response): The specified area and write data is returned in order
from word H (higher byte: bits 8 to 15) to word L (lower byte: bits 0 to 7). If an
odd number is specified, the last 1 byte of data will be written to word H.
No. of bytes received (response): The number of bytes received from the
destination node address (remote node) onwards is returned in hexadecimal.
Destination node address (response): The node address of the CS/CJseries DeviceNet Unit that returned the response is returned in hexadecimal.
Important Points

The actual address L, address H, and number of write data words that can be
specified depends on the type of CPU Unit with CS/CJ-series DeviceNet Unit
mounted and the type of memory area. Do not exceed the boundary of the
data areas for the PC you are using.

Word Data Write (Service Code: 1F Hex)
Word Data Write writes data to any I/O memory area in CPU Units with CS/
CJ-series DeviceNet Units mounted. The write word data is in word units. The
response block is returned from low to high bytes.
Command Block

Word data L

Class ID

Word data L

Instance ID
Service Code
Address L
Destination node address

Word data H

Address H

Write data (200 bytes max.)

178

Word data H

Section 6-5

Receiving Explicit Messages
Response Block

Service Code

Destination
node address
No. of bytes
received

Parameters

Destination node address (command): The node address of the CS/CJseries DeviceNet Unit to which the data is written, specified in 1-byte (2 digit)
hexadecimal.
Service code (command, response): IF Hex is specified for commands. For
responses, the highest bit will turn ON and 9F Hex will be returned.
Class ID (command): Always 002F Hex.
Instance ID (command): The memory area to which the data is written is
specified in hexadecimal as shown in the following table.
Instance ID (Hex)

CPU Unit memory area
for write

Word range

CIO

0000 to 6143

D00000 to D32767

W000 to W511

H000 to H511

08 to 14

EM, banks 0 to C

En_00000 to En_32767
(n: 0 to C)

Address L, Address H (command): The address of the first word to which
the data is written is specified in hexadecimal as shown below.
Address L: The lower 2 digits when the first word address is displayed in 4digit hexadecimal.
Address H: The higher 2 digits when the first word address is displayed in 4digit hexadecimal.
Write data (response): The specified area and write data is returned in order
from word L (lower byte: bits 0 to 7) to word H (higher byte: bits 8 to 15).
No. of bytes received (response): The number of bytes received from the
destination node address (remote node) is returned in hexadecimal.
Destination node address (response): The node address of the CS/CJseries DeviceNet Unit that returned the response is returned in hexadecimal.
Important Points

The actual address L, address H, and number of read words that can be specified depends on the mode of CPU Unit for the CS/CJ-series DeviceNet Unit
and the type of memory areas. Do not exceed the boundary of the data areas
for the PC you are using.

179

SECTION 7
Other Functions
This section describes connecting to CX-Programmer via the DeviceNet and the Memory Card backup function.
7-1

7-2

Connecting to the CX-Programmer via the DeviceNet. . . . . . . . . . . . . . . . . .

182

7-1-1

Setting Node Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

183

7-1-2

Setting the Message Monitoring Timer of the DeviceNet Unit . . . .

183

7-1-3

Setting the Frame Length when Using the CX-Programmer via the DeviceNet185

7-1-4

Response when Using the CX-Programmer via the DeviceNet . . . .

185

Memory Card Backup Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

186

7-2-1

Outline of Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

187

7-2-2

File Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

188

181

Section 7-1

Connecting to the CX-Programmer via the DeviceNet

7-1

Connecting to the CX-Programmer via the DeviceNet
With CX-Programmer Ver. 2.1 or later, a serial connection can be made to a
PC containing a CS/CJ-series DeviceNet Unit to form an online connection,
via the DeviceNet, to other PC CPU Units on the network.
• CS-series CPU Unit
• CJ-series CPU Unit
• Programmable Slave
DeviceNet Unit

CX-Programmer Ver. 2.1
or later

Serial -->
DeviceNet
gateway

Serial connection (Host Link or
peripheral bus)
Online connection (enabling all online functions,
including remote programming and monitoring)

DeviceNet

CS-series CPU
Unit

CJ-series CPU
Unit

Programmable
Slave

It is also possible to form an online connection (for remote programming or
monitoring) with the PC CPU Units shown above on the DeviceNet network
from another network.
CX-Programmer
Ver. 2.1 or later
Ethernet --> DeviceNet
gateway

Ethernet
Ethernet Unit

DeviceNet Unit

Online connection (enabling all online functions,
including remote programming and monitoring)
DeviceNet
DeviceNet Unit

Programmable
Slave
CS/CJ-series

182

Section 7-1

Connecting to the CX-Programmer via the DeviceNet

7-1-1

Setting Node Addresses
When the CX-Programmer is connected online, it uses FINS message communications. It is thus necessary to set the node address to a number other
than 0 for DeviceNet Units mounted to the target PC, DeviceNet Units
mounted to a PC which is connected by a serial connection to the CX-Programmer, or DeviceNet Units mounted to a PC relaying between networks.
If a DeviceNet Unit with the address node 0 exists in the online connection
path, connection will not be possible.

7-1-2

Setting the Message Monitoring Timer of the DeviceNet Unit
When connecting the CX-Programmer via the DeviceNet, set the message
monitoring timer inside the following DeviceNet Units to 20,000 ms (20 s).
• The DeviceNet Unit mounted to the PC with the serial connection to the
CX-Programmer.
• The DeviceNet Unit mounted to the PC relaying between networks.
CX-Programmer Ver.
2.1 or later

DeviceNet Unit

CX-Programmer Ver.
2.1 or later

Ethernet
Serial connection (Host
Link or peripheral bus)

Ethernet Unit

DeviceNet Unit

DeviceNet

Set the message
monitoring timer of
this DeviceNet Unit
to 20,000 ms (20 s).

Set the message
monitoring timer of this
DeviceNet Unit to
20,000 ms (20 s).

DeviceNet

Use the Configurator to set the message monitoring timer.
Setting the Message
Monitoring Timer
1,2,3...

Use the following procedure to set the message monitoring timer.
1. Select Device/Parameter/Edit and then click the Message Timer Tab.

183

Connecting to the CX-Programmer via the DeviceNet

Section 7-1

2. Double-click on the node address (#) that you want to change, or select the
node address and click on the Edit Button. A dialogue box like the one below will appear.

3. Input the value, then click on the OK Button.
Note To set the same value for all of the devices, select the node addresses to be set, then click on Copy to All Device.
Note

1. The default setting for the message monitoring timer is 2,000 ms (2 s). If it
is used without being changed, a communications error will result when the
CX-Programmer is operated. The setting range is 500 to 30,000 ms. Set in
units of ms.
2. The message monitoring timer serves as a timeout monitor for message
communications (both explicit and FINS). Settings can be made for each
device to which messages are to be sent. When the response from the target device is slow, the setting value must be increased. This is often the
case when FINS messages are sent across networks, because the response time is typically slow. However, when the setting is increased, subsequent messages cannot be sent to the same device until it is finished
waiting for the response.
Whereas the DeviceNet Unit monitors the message time-out with this timer, the CPU Unit monitors with the response monitor time set in the CMND/
SEND/RECV instruction. There is thus no effect when only one of them,
i.e., only the message monitoring timer or only the response monitor time
in the CMND/SEND/RECV instruction, is increased or decreased. Set the

184

Section 7-1

Connecting to the CX-Programmer via the DeviceNet

response monitor time in the CMND/SEND/RECV instruction to be the
same as or slightly longer than the time for the message monitoring timer
(Response monitor time in the CMND/SEND/RECV instruction ≥ message
monitoring timer.) If time-outs occur frequently, increase both of the settings equally, while maintaining the relationship between them.

7-1-3

Setting the Frame Length when Using the CX-Programmer via the
DeviceNet
When using the CX-Programmer via the DeviceNet, set the frame length in
the Network Settings under Change PLC from the CX-Programmer to 542
bytes or less.
When using the peripheral bus, the value must be changed because the
default setting is 1,004 bytes. The Host Link (SYSMAC WAY) does not need
to be changed because the factory setting is 540 bytes.
The frame length setting is made with the following window. Click on the Settings Button to the right of Network Type in the Change PLC Dialog Box to
access this window.

Set this value
to 542 or less.

Refer to the operation manual for the CX-Programmer for details.

7-1-4

Response when Using the CX-Programmer via the DeviceNet
To assure appropriate remote I/O response in the DeviceNet field network, the
DeviceNet Unit is designed to prioritize remote I/O communications over message communications. For this reason, when the CX-Programmer is connected via the DeviceNet Unit, its response suffers by up to a nine-fold drop
(for a communications speed of 500 Kbps) in comparison with connection by
a peripheral bus.
The following methods can be used to improve this response.
1,2,3...

1. Temporarily disable remote I/O communications.
Operate the CX-Programmer after disabling remote I/O communications
by turning ON the Remote I/O Communications Stop Switch (word n, bit
04) in the allocated CIO Area words. This will limit the drop in response to

185

Memory Card Backup Functions

Section 7-2

a maximum of four-fold (for a communications speed of 500 Kbps) in comparison with connection by a peripheral bus.
2. Temporarily extend the communications cycle time.
Operate the CX-Programmer after extending the cycle time in the Communications Cycle Time Setup Table (word m) in the DM Area, and turning ON
the Temporary Setting Switch for Communications Cycle Time (word n, bit
12).
Extending the communications cycle time 1.5 times will result in a 20%30% improvement in response. However, whereas the CX-Programmer response will increasingly improve by extending the communications cycle
time, the remote I/O communications response will suffer.
Note The CX-Programmer response decreases in accordance with decreases in
the DeviceNet communications speed. At a speed of 125 Kbps, response will
suffer by up to a twenty-fold drop in comparison with connection by a peripheral bus.
Accordingly, a DeviceNet communications speed of 500 Kbps is recommended when the CX-Programmer is connected to the network via the
DeviceNet Unit.

7-2

Memory Card Backup Functions
The DeviceNet Unit stores the following setup data in the internal non-volatile
memory (EEPROM).
• Master scan lists
• Slave scan lists
• Message monitoring timer lists
• Communications cycle time settings
• Master/Slave functions enabled/disabled settings
Note Backup is possible only when scan lists are enabled.
With the CS/CJ-series DeviceNet Unit, all this setup data can be backed up to
and restored from a Memory Card mounted to the CPU Unit. (See note.)
Note The data can be backed up to a Memory Card only. It cannot be backed up to
a EM file.
If all setup data for a DeviceNet Unit that starts normally is saved on a Memory Card, that data can be read and used when replacing DeviceNet Units,
making the replacement process smooth.
Device parameter files (.dvf files) created using the Configurator can be saved
from the computer to the Memory Card and can be restored to the DeviceNet
Unit mounted to the CPU Unit. This means that setup data created using the
Configurator (scan lists and other parameters) can be downloaded to
DeviceNet Units simply by taking the Memory Card to site.

186

Section 7-2

Memory Card Backup Functions
DeviceNet Unit

Unit Setup File Backup Switch

CPU Unit

Unit Setup File Restore Switch
Configurator (computer)

All setup
data

Memory Card
Backup

Save file

Restore

7-2-1

Load file

Outline of Functions

1. Backing Up Unit Setup Files
Saves all internal Unit setup data to the Memory Card mounted to the CPU
Unit.
Method: Turn ON the Setup File Backup Switch (word n+1, bit 15) to save the
internal Unit setup data to the Memory Card as a Unit Setup File.
DeviceNet Unit

CPU Unit

Unit Setup File Backup switch

Memory Card

data
Backup

2. Restoring Unit Setup Files
Restoring Unit Setup Files involves reading the data and setting it to a Unit.
The data saved to the Memory Card mounted to the CPU Unit is read to the
Unit.
Method: Turn ON the Unit Setup File Restore Switch (word n+1, bit 14) to read
the Unit setup data file on the Memory Card and to enable these settings as
the Unit settings.

187

Section 7-2

Memory Card Backup Functions
DeviceNet Unit

CPU Unit

All setup
data

Unit Setup File Restore Switch

Memory Card
Restore

Note If there is an error in the setup data or if the file could not be read, the File
Read/Write Error bit in Unit Status 2 (word n + 11, bit 08) will turn ON.

3. Saving Files from Configurator to Memory Card
Device parameter files (.dvf files) for this DeviceNet Unit that have been created using the Configurator can be saved on the Memory Card via the HMCAP001 Memory Card Adaptor as file name DNnnBKUP.dvf (where nn is the
Unit number in 2-digit hexadecimal). This DeviceNet Unit can be mounted to
the CPU Unit and, by turning ON the Unit Setup File Restore Switch (word n,
bit 14), the setup data can be restored to the DeviceNet Unit.
Note The file name when saving setup data to the Memory Card must be DNnnBKUP.dvf (where nn is the Unit number in 2-digit hexadecimal). For example,
for unit number 00, the file name must be DN00BKUP.dvf. If the file is saved
under another name, the data cannot be restored from the Memory Card to
the DeviceNet Unit.
DeviceNet Unit

CPU Unit
Unit Setup File Restore Switch
HMC-AP001 Memory Card Adaptor
Memory Card
Memory Card

All
setup
data

Configurator (computer)

Restore
Saving device
parameter file
Saved as file name DNnnBKUP.dvf, where nn
is the Unit number in 2-digit hexadecimal.)

7-2-2

File Names
The following files are created on the Memory Card.
Directory (fixed): Route and directory.
File name (fixed): DNnnBKUP.dvf (nn: Unit number in 2-digit hexadecimal).
Note The data in the above files is compatible with the data in the DeviceNet Unit
device parameter file.

188

SECTION 8
Communications Timing
This section describes the time required for remote I/O communications and message communications.
8-1

8-2

Remote I/O Communications Characteristics. . . . . . . . . . . . . . . . . . . . . . . . .

190

8-1-1

Communications Cycle Time and Refresh Time . . . . . . . . . . . . . . .

190

8-1-2

I/O Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

192

8-1-3

More than One Master in Network . . . . . . . . . . . . . . . . . . . . . . . . . .

194

8-1-4

System Startup Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

195

Message Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

196

8-2-1

Message Communications Time. . . . . . . . . . . . . . . . . . . . . . . . . . . .

196

8-2-2

Calculating the Maximum Message Response Time . . . . . . . . . . . .

197

189

Remote I/O Communications Characteristics

8-1

Section 8-1

Remote I/O Communications Characteristics
This section describes the characteristics of remote I/O communications
when the DeviceNet Unit is used as a master in combination with OMRON’s
slaves. Use this section for reference when planning operations that require
precise I/O timing.
The equations provided here are valid under the following conditions:
1,2,3...

1. The DeviceNet Unit is operating with the scan list enabled.
2. All of the required Slaves are participating in communications.
3. No errors are being indicated at the DeviceNet Unit
4. Messages aren’t being produced in the Network (from another company’s
configurator, for example).

Note The values provided by these equations may not be accurate if another company’s Master or Slave is being used in the Network.

8-1-1

Communications Cycle Time and Refresh Time
This section explains the communications cycle time, communications time
per slave, and refresh time required for calculating processing time by the
DeviceNet Unit.

Communications Cycle Time
The communications cycle time is the time from the completion of a Slave’s
remote I/O communications processing until remote I/O communications with
the same Slave are processed again. The communications cycle time is used
to calculate the maximum I/O response time.
The communications cycle time depends on the number of Masters in the
Network and on whether or not message communications are being performed. The following explanation is for a network with one Master. For networks with several Masters, refer to More than One Master in Network in the
following section.
The following graph shows communications cycle time for the number of
slaves when there are both 16-point output and 16-point input slaves.
Inputs: Bit strobe, Outputs: Poll connection

Communications cycle time (ms)

Communications Cycle
Time Graph

Number of Slaves
: Communications cycle time: 500 kbps (ms)
: Communications cycle time: 250 kbps (ms)
: Communications cycle time: 125 kbps (ms)

190

Remote I/O Communications Characteristics
Communications Cycle
Time Calculation

Section 8-1

Use the equations shown below to calculate the communications cycle time
(TRM) for a network with one Master. Note that if the result of this calculation is
less than 2 ms, the actual communications cycle time will be 2 ms.
TRM= Σ (Communications time per Slave)
+ High-density Unit processing time
+ Explicit message processing time
+ COS/Cyclic connection time (ms)
+ 0.01 × N + 1.0 [ms]
Communications Time per Slave:
This is the communications time required for a single Slave.
“Σ (Communications time per Slave)” represents the total of the “Communications time per Slave” for all the Slaves in the network.
High-density Unit Processing Time:
3.5 ms
This is added if there are any Slaves in the network that use at least 8 bytes
for input, output, or both.
Explicit Message Processing Time:
(0.11 × TB) × n [ms]
Only added when explicit communications (sending or receiving) are performed.
n= Number of explicit messages (both sending and receiving) that occur in
one cycle time
TB =
The baud rate factor
(500 kbps: TB = 2; 250 kbps: TB = 4; 125 kbps: TB = 8)
COS/Cyclic Connection Time:
{(0.05+0.008 × S) × TB} × n (ms)
S: Total number of inputs and outputs in the COS/cycle connection (bytes)
TB: The baud rate factor
(500 kbps: TB = 2; 250 kbps: TB = 4; 125 kbps: TB = 8)
n: Number of nodes occurring simultaneously within 1 communications cycle
time in the COS/Cyclic connection
N: Number of Slaves

Communications Time/Slave
The communications time per Slave is the communications time required for a
single Slave.
The following equations show the communications time/Slave (TRT) for each
kind of Slave Unit.
Output Slaves with Less
Than 8 Bytes of Output

TRT = 0.016 ×TB × SOUT1 + 0.11 × TB + 0.07 [ms]
SOUT1 : The number of Output Slave output words
The baud rate factor
TB :
(500 kbps: TB = 2; 250 kbps: TB = 4; 125 kbps: TB = 8)

Input Slaves with Less
Than 8 Bytes of Input

TRT = 0.016 ×TB × SIN1 + 0.06 × TB + 0.05 [ms]
SIN1 : The number of Input Slave input words
The baud rate factor
TB :
(500 kbps: TB = 2; 250 kbps: TB = 4; 125 kbps: TB = 8)

Mixed I/O Slaves with Less
Than 8 Bytes of Input or
Output

TRT = 0.016 × TB × (SOUT2 + SIN2) + 0.11 × TB + 0.07 [ms]
SOUT2 : The number of Mixed I/O Slave output words
SIN2 : The number of Mixed I/O Slave input words
The baud rate factor
TB :
(500 kbps: TB = 2; 250 kbps: TB = 4; 125 kbps: TB = 8)

191

Section 8-1

Remote I/O Communications Characteristics
TRT = TOH + TBYTE-IN ×
TOH :
TBYTE-IN :
BIN :
TBYTE-OUT :
BOUT :

Slaves with More Than 8
Bytes of Input or Out put

Baud rate
500 kbps
250 kbps
125 kbps

BIN + TBYTE-OUT × BOUT [ms]
Protocol overhead
The input byte transmission time
The number of input words
The output byte transmission time
The number of output words
TOH

0.306 ms
0.542 ms
1.014 ms

TBYTE-IN
0.040 ms
0.073 ms
0.139 ms

TBYTE-OUT
0.036 ms
0.069 ms
0.135 ms

For Input Slaves take BOUT to be 0, and for Output Slaves take BIN to be 0.

Refresh Time
The refresh time is the time required for I/O data to be exchanged between
the PC’s CPU Unit and the DeviceNet Unit. The CPU Unit’s cycle time is
increased when a DeviceNet Unit is mounted, as shown below.
Processing item
I/O refresh

Note

8-1-2

Processing time
DeviceNet Unit I/O refreshing time (ms)
0.7 + 0.001 × the number of words refreshed (See note 1.)

1. The number of words refreshed is the total number of words in the I/O area
that are used by the Slaves, including any unused words between words
actually used by the Slaves. For example, if there are only two Input Slaves
with node addresses 1 and 5, the 5 input words for nodes 1 through 5
would be refreshed even though the input words for nodes 2, 3, and 4 are
unused.
2. If message communications are being performed, just add the number of
words used in message communications to the above number of words for
whenever messages are being processed.
3. When the message communications are performed, an event execution
time must be added to the PC cycle time.
4. For details about refresh time or PC cycle time, refer to operation manual
of the PC.

I/O Response Time

Maximum I/O Response Time
Communications Cycle
Time ≥ PC Cycle Time

The maximum I/O response time will be as shown below if the DeviceNet Unit
takes in data immediately after I/O refreshing and if the communications cycle
time is longer than the PC cycle time.
Instruction
execution

PC
ON input data
notice delayed
Communications cycle

Slave

192

Transfers to the
shared RAM
when PC scan is
completed.

Instruction
execution
Takes into the
PC's internal
memory.

Instruction
execution

Section 8-1

Remote I/O Communications Characteristics
TIN:
TOUT:
TRM:
TPC:

The Input Slave’s ON (OFF) delay
The Output Slave’s ON (OFF) delay
Network’s communications cycle time (See page 191.)
The PC’s cycle time (See note below.)

Note The PC’s cycle time will be delayed as shown below for one DeviceNet Unit. For details, refer to Refresh Time on page 192.
0.7 ms + (number of occupied words × 0.001 ms)
The maximum I/O response time (TMAX) is the total of the following terms:
TMAX = TIN + TRM × 2 + TPC × 3 + TOUT
Communications Cycle
Time < PC Cycle Time

The maximum I/O response time will be as shown below if the DeviceNet Unit
takes in data immediately after I/O refreshing and if the communications cycle
time is shorter than the PC cycle time.
Instruction
execution

Instruction
execution

Transfers to the
shared RAM when
communications
cycle is completed.
Communications cycle

Slave

TIN:
TOUT:
TRM:
TPC:

The Input Slave’s ON (OFF) delay
The Output Slave’s ON (OFF) delay
Network’s communications cycle time (See page 191.)
The PC’s cycle time (See note below.)

1. Refer to the CompoBus/D (DeviceNet) Slaves Operation Manual (W347)
for details on the Input and Output Slaves’ delay times.
2. Refer to Refresh Time on page 192 and to the PC’s Operation Manual for
details on the PC’s cycle time.

193

Section 8-1

Remote I/O Communications Characteristics
Minimum I/O Response Time

The minimum I/O response time occurs when the Slave’s I/O refreshing is
executed just after the input signal is received by the DeviceNet Unit and the
output signal is output at the beginning of the next I/O refresh cycle.

Instruction
execution

Master Unit processing

Input
Output

(TPC+TRF)

The Input Slave’s ON (OFF) delay
TIN:
TOUT: The Output Slave’s ON (OFF) delay
TRT-IN: Input Slave’s communications time/Slave (See page 191.)
TRT-OUT: Output Slave’s communications time/Slave (See page 191.)
The PC’s cycle time
TPC:
The PC’s DeviceNet Unit refresh time (See page 192.)
TRF:
The minimum I/O response time (TMIN) is the total of the following terms:
Note

8-1-3

TMIN = TIN + TRT-IN + TPC + TRF + TRT-OUT + TOUT
1. Refer to the CompoBus/D (DeviceNet) Slaves Operation Manual (W347)
for details on the Input and Output Slaves’ delay times.
2. Refer to Refresh Time on page 192 and to the PC’s Operation Manual for
details on the PC’s cycle time.

More than One Master in Network
The following equation shows the remote I/O communications cycle time
(TRM) when there is more than one master in the network. An example for two
masters is used.
First, the network is divided into two groups: Master A and the slaves in
remote I/O communications with it and master B and the slaves in remote I/O
communications with it.

Slave A

Group A

Group B

Master A

Master B

Slave B

Slave C

Slaves in remote I/O communications with Master A

194

Slave D

Slave E

Slave F

Slaves in remote I/O communications with Master B

Section 8-1

Remote I/O Communications Characteristics

Note Although in the above diagram the Slaves are separated into two groups for
convenience, the actual physical positions in the Network are irrelevant.
Next, we can refer to 8-1-1 Communications Cycle Time and Refresh Time
and calculate the communications cycle time for each group as if they were
separate Networks.
Group B

Group A

Master B

Master A

Slave A

Slave C

Slave B

Slave D

Group A communications
cycle time: TRM-A

Slave E

Slave F

Group A communications
cycle time: TRM-B

In Networks with two Masters, the communications cycle time for the entire
Network will be the sum of the communications cycle times for the groups.
TRM = TRM-A + TRM-B
Although this example shows only two Masters in the Network, the total communications cycle time for any Network can be calculated by dividing it into
groups and adding the communications cycle times of all groups.

8-1-4

System Startup Time

Master Function
This section describes the system startup time for a network operating with
the scan list enabled. The system startup time is the delay from the time that
the DeviceNet Unit (master) is turned ON until remote I/O communications
begin. Here, we assume that the scan list is enabled and that remote I/O communications are set to start automatically at startup.
The following table shows the system startup times for two cases. In the first
case, the DeviceNet Unit starts up just after all of the Slaves’ power supplies
are turned ON. In the second case, the DeviceNet Unit is restarted while communications are in progress.
Case

Program Example

Slave’s indicator status

System
startup time

The Master is
started just after
Slave startup.

The NS indicator is OFF or flashing green.

5 seconds

Just the Master is
restarted.

The NS indicator is flashes red while the Mas- 7 seconds
ter is OFF.

Just the Slaves are
restarted.

---

9 seconds

As shown in the preceding table, it takes time for DeviceNet communications
to start up. This programming uses flags in the Master status area to prevents
the Slaves’ I/O processing from being performed until remote I/O communications start up.

195

Section 8-2

Message Communications

This programming is for a DeviceNet Unit with a unit number of 00.
1512
15

1510
00

Remote I/O
Communications
(n+12, bit 15)
Unit Error
(n+10, bit 00)

Slaves' I/O
processing

Note Refer to 3-2 Allocated CIO Area Words for details on the Master Status Area.

Slave Function
It takes approximately four seconds from the time that the Devicenet Unit is
turned ON or restarted as a slave until remote I/O communications with the
master begin.

8-2
8-2-1

Message Communications
Message Communications Time
The message communications time is the time required from the time a Master Unit starts to send a message over the Network to another node until the
Master Unit completes sending the message (data for SEND(192)/
RECV(193) and FINS commands for CMND(194)/IOWR).
The following equation can be used to compute the approximate message
communications time.
Message communications time =
Communications cycle time x ((No. of message bytes + 15) ÷ 6 + 1)
No. of message bytes: No. of data bytes following the FINS command code
The communications cycle time depends on whether or not remote I/O communications are being used.
Message Communications Only (No Remote I/O Communications)
The following equation can be used to compute the message communications
time when remote I/O communications are not being used.
Communications cycle time =
2 (see note) + 0.11 × TB + 0.6 [ms]
TB :

The baud rate factor
(500 kbps: TB = 2; 250 kbps: TB = 4; 125 kbps: TB = 8)
Note The communications cycle time will be 2 ms even if remote I/O communications are not being used.
Remote I/O and Message Communications
Performing message communications in addition to remote I/O communications will increase the message communications time.
Communications cycle time=
Communications cycle time for remote I/O communications only
+ 0.11 × TB + 0.6 [ms]
TB :

196

The baud rate factor
(500 kbps: TB = 2; 250 kbps: TB = 4; 125 kbps: TB = 8)
(Varies depending on the baud rate.)

Section 8-2

Message Communications
Note

8-2-2

1. If the CPU Unit attempts to send another message or receives a message
from another node within the message communications time, the second
message or the message being received from another node may be destroyed. Never execute a second communications instruction before the
message communications time has elapsed and never send messages to
any one node at intervals less than the message communications time.
2. If send or receive messages are destroyed, error records will be placed in
the error history of the Master Unit. If an error occurs, read the error history
using the FINS command or monitor the error history from the Configurator.
3. The above equations can be used to find the approximate message communications time, but this is a typical time, not the maximum time. The
message communications time will vary depending on the frequency of
message communications, the load on the remote node, the communications cycle time, and other factors. For any one Master Unit, the message
communications time can be greatly increased due to heavy loads and the
user program must be written to allow for this.

Calculating the Maximum Message Response Time
The message response time is the time required from the time a DeviceNet
Unit starts to receive an I/O memory read request message (BYTE DATA
READ explicit message) until the DeviceNet Unit completes sending the
response message to the client.
The message response times described below are based on the following
conditions:
1,2,3...

1. Only one DeviceNet Unit is mounted.
2. The I/O memory read request is returned from CS/CJ-series PC in two cycle time.
3. Baud rate: 500 Kbps
4. Communications cycle time: 3 ms (no remote I/O communications)
5. PC’s cycle time: 10 ms
6. DeviceNet Unit’s refresh time: 2 ms (See note.)
Note The PC’s cycle time will be delayed as shown below for one DeviceNet Unit. For details, refer to Refresh Time on page 192.
0.7 ms + (number of occupied words × 0.001 ms)

Request from One Client (BYTE DATA READ)
Instruction
execution

Instruction
execution

BYTE DATA READ processing time:
PC's cycle time x 2

Shared memory

DeviceNet internal buffer

Communications cycle
Read
request
Client

Read result

197

Section 8-2

Message Communications

Shown below is the response time required to return data for 100 words.
• BYTE DATA READ request sending time: TBRS
DeviceNet header (4 bytes) + Parameters (3 bytes) = 7 bytes (no fragment)
Therefore, TBRS = 1 communications cycle time (TRM) = 3 ms
• PC’s processing time: TPC x 2
TPC x 2 = PC’s cycle time x 2 = 10 x 2 = 20 ms
• BYTE DATA READ response receiving time: TBRR
DeviceNet header (3 bytes) + Number of words to be read x 2 = 203 bytes
Therefore, TBRR = 1 + 203 bytes/6 communications cycle time = 35 communications cycle time
• DeviceNet Unit refresh time: TRF = 2 ms
The message response time will be as follows:
= TRM + TPC x 2 + TRM x 35 + TRF x 2 =3+20+105+4
= 132 ms
Shown below is the response time required to return data for 100 words to 8
clients.
• BYTE DATA READ request sending time: TBRS
DeviceNet header (4 bytes) + Parameters (3 bytes) = 7 bytes (no fragment)
Therefore, TBRS = 1 communications cycle time (TRM) = 3 ms
• PC’s processing time: TPC x 6 + TPC x 2 = TPC x 8
The following time is required to process data with other clients before the
PC starts processing.
7 other clients/2 = Approximately cycle time x 3
If one processing requires twice the cycle time, the time will be as follows:
Cycle time x 3 x 2 = Cycle time x 6
PC’s processing time: TPC x 2 = Cycle time x 2
Total time will be as follows:
Cycle time x 8
• BYTE DATA READ response receiving time: TBRR
DeviceNet header (3 bytes) + Number of words to be read x 2 = 203 bytes
Therefore, TBRR = 1 + 203 bytes/6 communications cycle time = 35 communications cycle time
• DeviceNet Unit refresh time: TRF = 2 ms
The message response time will be as follows:
= TRM + TPC x 8 + TRM x 35 + TRF x 2 x 8 =3+80+105+32
= 220 ms
Note The above equations can be used to find the approximate message response
time, but this is the typical time, not the maximum time. The message
response time will vary depending on the frequency of message communications, the load on the remote node, the communications cycle time, and other
factors. For any one DeviceNet Unit, the message communications time can
be greatly increased due to heavy loads and the user program must be written
to allow for this.

198

SECTION 9
Troubleshooting and Maintenance
This section describes error processing, periodic maintenance operations, and troubleshooting procedures needed to keep
the DeviceNet network operating properly. We recommend reading through the error processing procedures before
operation so that operating errors can be identified and corrected more quickly.
9-1

9-2

9-3

9-4

Troubleshooting with the DeviceNet Unit Indicators . . . . . . . . . . . . . . . . . . .

200

9-1-1

Determining Operating Status from the Indicators. . . . . . . . . . . . . .

200

9-1-2

Troubleshooting Errors Occurring in the DeviceNet Unit . . . . . . . .

201

Error Log Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

218

9-2-1

Error Log Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

218

9-2-2

Error Codes and Detail Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

219

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

222

9-3-1

CPU Unit’s ERR/ALM Indicator Lit or Flashing. . . . . . . . . . . . . . .

222

9-3-2

Remote I/O Communications Disabled . . . . . . . . . . . . . . . . . . . . . .

222

9-3-3

I/O Link Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

223

9-3-4

Communications Error Operation Settings. . . . . . . . . . . . . . . . . . . .

224

9-3-5

Scan List Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

224

Maintenance and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

225

9-4-1

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

225

9-4-2

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

225

9-4-3

Replacing Faulty Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

226

199

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators

9-1
9-1-1

Troubleshooting with the DeviceNet Unit Indicators
Determining Operating Status from the Indicators
The following table shows the status of the MS and NS indicators and the 7segment display during normal operation.
Indicator status

Network/Unit status

Comments

7-segment

OFF

Initializing with PC

Initialization processing with the PC is in progress.
Restart the DeviceNet Unit if this status continues
for an extended period of time. Replace the CPU
Unit and/or DeviceNet Unit if the problem is not corrected by restarting.

ON
(green)

OFF

Master’s node Checking for node address
duplication
address
(flashing)

The node address duplication check is performed
after initialization.

ON
(green)

Flashing
(green)

Master’s node Waiting for remote I/O comaddress
munications
(flashing)

The Unit will have this status until remote I/O communications are performed with the master or slave
function. (When both functions are operating, the
Unit will have this status until remote I/O communications are performed with either function.)

Master’s node Waiting for message commuaddress
nications connection

The Unit will have this status when both the master
and slave functions are disabled and the Unit is
waiting for a connection by message communications.

ON
(green)

Master’s node Remote I/O or message com- This is the normal display when the master and/or
address
munications in progress.
slave is active.

ON
(green)

- - (flashing)

200

Scan list operation in
progress.

The scan list is being saved in flash memory or the
scan list is being cleared.

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators

9-1-2

Troubleshooting Errors Occurring in the DeviceNet Unit

Error category

Error

Indicators
MS

7-segment

Master function
Software settings errors

Remote I/O communications stopped by
a communications error
CPU Unit status error
Unit status error
Structure error
Incorrect setting
Multiple switches ON
Master funcStructure
I/O area duplication
tion
errors
I/O area range exceeded
Unsupported slave
Verification
Non-existent slave
errors
Illegal vendor
Illegal connection path
I/O size mismatch
Illegal device
Illegal product code
Unsupported connection
Remote I/O communications error
Network errors Network power supply error
Transmission timeout error
Memory
Message monitoring timer list logic error
access errors Slave scan list logic error
Master scan list logic error
Memory access error
Network errors Node address duplication
Bus Off detected
CPU Unit
Unit number duplication
exchange
CPU Unit faulty (H2)
DeviceNet Unit faulty
Node address setting error
Communications speed setting error
CPU Unit faulty (H6)
I/O table not registered
CPU Unit memory faulty
CPU Unit faulty (Hb)
Routing table logic error
I/O refresh error
CPU Unit service monitoring error
CPU Unit watchdog timer error
Slave function Remote I/O communications error
Unit errors
Special Unit error
CPU Unit
CPU Unit fatal error
exchange
Output OFF error

Note

---

C0
C2
C4
C5
C6
d0
d1
d2
d5
d6
d6
d6
d6
d6
d6
d9
E0
E2
E6
E7
E8
E9
F0
F1
H1
H2
H3
H4
H5
H6
H7
HA
Hb
HC
Hd
HE
HF
L9
OFF
-----

------------------------------------Red (flashing)

----------Red (flashing)

Error
log
(Hex)
0346

----------0343
0343
0343
0344
0344
0344
0344
0344
0344
0344
Red (flashing) 0345
OFF or
0341
Red (flashing) 0342
--021A
--021A
--021A
--0602
--Red (lit)
0211
--0340
Red (flashing) OFF
----Red (lit)
OFF
--Red (flashing) OFF
----000F
0006
--0012
0011
021A
0347
0002
0001
--Red (flashing) 0345
Red (lit)
OFF
0601
-------------

Page

202
207
207
207
208
208
202
203
203
203
204
204
205
205
205
206
206
208
209
210
211
211
212
209
210
213
213
213
213
213
214
214
214
214
215
215
216
216
217
217

1. The 7-segment display will alternate between the Unit’s node address and
the code given in the tables in this section.
2. When a (master function) structure error or verification error occurs, only
the most recent error is displayed for each slave. If the Unit is set to stop

201

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators

remote I/O communications for a communications error, two errors can be
displayed: The slave’s communications error and its most recent error.

Master Errors
Remote I/O
Communications Stopped
by a Communications
Error

7-segment
A0

MS indicator
---

NS indicator
---

Error log (Hex)
0346

Likely Cause
Pin 3 on the master’s DIP switch is set to stop communications in the event of
a communications error and communications have been stopped due to a
remote I/O communications error, network power supply error, or transmission
timeout.
DeviceNet Unit Response
Remote I/O communications as a master will stop. Remote I/O communications as a slave and message communications will continue.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (the Error Flag) will be ON as well as bit 05 or 06 (the Sending Error
Flag or Communications Error Flag).
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+10 (Unit Error Flag) will be ON together with one of the following
combinations:
• Bit 02 of n+12 (the Remote I/O Communications Error Flag) and bit 01 of
n+10 (the Master Function Error Flag) ON.
• Bit 07 of n+10 (the Network Power Error Flag) ON.
• Bit 08 of n+10 (the Send Timeout Flag) ON.
Correction
Perform error processing according to the cause:
• Remote I/O communications error (See error d9.)
• Network power supply error (See error E0.)
• Transmission timeout error (See error E2.)
Correct the cause of the error and then restart remote I/O communications by
toggling bit 02 of n (the Remote I/O Communications Start Switch.)
Structure Error:
I/O Area Duplication

7-segment
d0

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0343

Likely Cause
The slave’s I/O areas overlap. (Occurred with the scan list disabled.)
Errors will occur in the active slaves.
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the structure error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (the Error Flag) and bit 04 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 01 of n+12 (the Structure Error Flag) and bits 00 and 01 of n+10 (the Unit
Error Flag and Master Function Error Flag) will be ON.

202

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators
Correction
Set the slaves’ node addresses again.
Structure Error:
I/O Area Range Exceeded

7-segment
d1

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0343

Likely Cause
The slave’s I/O area isn’t within the allowed range. (Occurs with the scan list
disabled.)
DeviceNet Unit Response
Records the error in the error log. The master will periodically attempt to
reconnect with the slave with the structure error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (the Error Flag) and bit 04 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 01 of n+12 (the Structure Error Flag) and bits 00 and 01 of n+10 (the Unit
Error Flag and Master Function Error Flag) will be ON.
Correction
Set the slaves’ node addresses again or use user-set allocations.
Structure Error:
Unsupported Slave

7-segment
d2

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0343

Likely Cause
The size of the slave’s input and/or output area exceeded 200 bytes. (Occurs
with the scan list disabled.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the structure error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 04 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 01 of n+12 (Structure Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Use slaves with input and output areas of 200 bytes max.
Verification Error:
Non-existent Slave

7-segment
d5

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0344

Likely Cause
A slave registered in the scan list doesn’t exist or the local node’s (master’s)
node address is registered in the scan list. (Occurs with the scan list enabled.)
DeviceNet Unit Response
Records the error in the error log.
• If a slave is involved, the master will periodically attempt to reconnect.
• If the master is involved, it will not send an OPEN frame to itself.

203

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators

Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Check the following:
• Matching master and slave baud rates
• Proper cable lengths (trunk and branch lines)
• Broken or loose cables
• Installation of terminators at both ends of the trunk line
• Excessive noise
Verification Error:
Illegal Vendor

7-segment
d6

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0344

Likely Cause
The Configurator is set to check the vendor and the slave’s vendor does not
match the registered scan list. (Occurs with the scan list enabled.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the verification error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Inspect the slave and then create the scan list again.
Verification Error:
Illegal Connection Path

7-segment
d6

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0344

Likely Cause
The connection path was set with the Configurator and there is a mistake in
the connection path setting in the scan list. (Occurs with the scan list
enabled.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the verification error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.

204

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators
Correction
Inspect the slave and then create the scan list again.
Verification Error:
I/O Size Mismatch

7-segment
d6

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0344

Likely Cause
The slave’s I/O data size does not match the registered scan list. (Occurs with
the scan list enabled.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the verification error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Inspect the slave and then create the scan list again.
Verification Error:
Illegal Device

7-segment
d6

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0344

Likely Cause
The Configurator is set to check the device type and the slave’s device type
does not match the registered scan list. (Occurs with the scan list enabled.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the verification error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Inspect the slave and then create the scan list again.
Verification Error:
Illegal Product Code

7-segment
d6

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0344

Likely Cause
The Configurator is set to check the product code and the slave’s product
code does not match the registered scan list. (Occurs with the scan list
enabled.)

205

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Troubleshooting with the DeviceNet Unit Indicators
DeviceNet Unit Response

Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the verification error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Inspect the slave and then create the scan list again.
Verification Error:
Unsupported Connection

7-segment
d6

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0344

Likely Cause
The device does not support the I/O service specified in the scan list. (Occurs
with the scan list enabled.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the verification error.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 07 (Comparison Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 00 of n+12 (Comparison Error Flag) and bits 00 and 01 of n+10 (Unit Error
Flag and Master Function Error Flag) will be ON.
Correction
Inspect the slave and then create the scan list again.
Remote I/O
Communications Error

7-segment
d9

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0345

Likely Cause
A timeout occurred during remote I/O communications using the master function. (The response from the slave timed out 6 consecutive times.)
DeviceNet Unit Response
Records the error in the error log.
The master will periodically attempt to reconnect with the slave with the error,
but remote I/O communications will stop if the master is set to stop communications.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 06 (Communications Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bit 02 of n+12 (Remote I/O Communications Error Flag) and bits 00 and 01 of
n+10 (Unit Error Flag and Master Function Error Flag) will be ON.
Correction
Check the following:

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Troubleshooting with the DeviceNet Unit Indicators
• Matching master and slave baud rates
• Proper cable lengths (trunk and branch lines)
• Broken or loose cables
• Installation of terminators at both ends of the trunk line
• Excessive noise

Software Switch Setting Errors
CPU Unit Status Error
7-segment
C0

MS indicator
---

NS indicator
---

Error log (Hex)
---

Likely Cause
The software settings operation couldn’t be performed because the CPU Unit
wasn’t in PROGRAM mode.
DeviceNet Unit Response
The only response is the error code displayed on the 7-segment display. The
error display will be cleared the next time that a settings operation is completed normally.
Correction
Switch the CPU Unit to PROGRAM mode and try the operation again.
Unit Status Error
7-segment
C2

MS indicator
---

NS indicator
---

Error log (Hex)
---

Likely Cause
The setting operation failed because the Unit could not perform the requested
process in its current status. The most common causes of Unit status errors
during settings operations are listed below:
• The master was stopped and a software switch operation relating to the
master function was performed. (This does not include the master enable
operation.)
• The scan list was enabled and a software switch operation was performed
that can only be performed while the scan list is disabled. (Scan list
enable and fixed allocation setting operations)
• The scan list was disabled and a software switch operation was performed that can only be performed while the scan list is enabled. (Clear
scan list and Backup Unit settings file operations)
• The slave was stopped and a software switch operation relating to the
slave function was performed. (This does not include the slave enable
operation.)
DeviceNet Unit Response
The only response is the error code displayed on the 7-segment display. The
error display will be cleared the next time that a settings operation is completed normally.
Correction
Change the Unit’s status to allow the operation and try the operation again.
Structure Error
7-segment
C4

MS indicator
---

NS indicator
---

Error log (Hex)
---

207

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators
Likely Cause

The setting operation failed because a structure error occurred.
DeviceNet Unit Response
The only response is the error code displayed on the 7-segment display. The
error display will be cleared the next time that a settings operation is completed normally.
Correction
Correct the cause of the structure error. (See errors d0 to d2.)
Incorrect Setting
7-segment
C5

MS indicator
---

NS indicator
---

Error log (Hex)
---

Likely Cause
There was an error in the parameters specified in the user settings and the
requested settings could not be made.
DeviceNet Unit Response
The only response is the error code displayed on the 7-segment display. The
error display will be cleared the next time that a settings operation is completed normally.
Correction
Check the parameters in the user settings and try the operation again.
Multiple Switches ON
7-segment
C6

MS indicator
---

NS indicator
---

Error log (Hex)
---

Likely Cause
Two or more software switches were ON simultaneously or a second software
switch was turned ON before a prior operation was completed.
DeviceNet Unit Response
The only response is the error code displayed on the 7-segment display. The
error display will be cleared the next time that a settings operation is completed normally.
Correction
Execute software switch operations one at a time.

Network Errors
Network Power Error
7-segment
E0

MS indicator
---

NS indicator

Error log (Hex)

OFF or Red (flashing)* 0341

Note The NS indicator will flash red if the error occurs during remote I/O communications, otherwise the indicator will be OFF.
Likely Cause
The communications power supply is not being supplied properly from the
network.
DeviceNet Unit Response
Records the error in the error log.
As long as power isn’t being supplied remote I/O communications will remain
stopped and errors will be returned in response to requests for message
transmissions. The indicator status, scanning, and message processing will

208

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators

return to normal when the network power supply is restored, although scanning will not resume if the DeviceNet Unit is set to stop remote I/O communications when a communications error occurs.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 05 (the Sending Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 07 of n+10 (the Unit Error Flag and Network Power Error Flag) will
be ON.
Correction
Check the network power supply and the wiring of the network cables.
Transmission Timeout
Error

7-segment
E2

MS indicator
---

NS indicator

Error log (Hex)

OFF or Red (flashing)* 0342

Note The NS indicator will flash red if the error occurs during remote I/O communications, otherwise the indicator will be OFF.
Likely Cause
A transmission request was not completed normally for one of the following
reasons:
• There is not even one device such as a slave in the network.
• The communications speed settings are not the same in all of the nodes.
• CAN controller error
DeviceNet Unit Response
Records the error in the error log.
As long as transmission timeout is in effect, remote I/O communications will
remain stopped and errors will be returned in response to requests for message transmissions. The indicator status, scanning, and message processing
will return to normal when the network power supply is restored, although
scanning will not resume if the DeviceNet Unit is set to stop remote I/O communications when a communications error occurs.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 05 (the Sending Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 08 of n+10 (the Unit Error Flag and Send Timeout Flag) will be
ON.
Correction
Check the following:
• Matching master and slave baud rates
• Proper cable lengths (trunk and branch lines)
• Broken or loose cables
• Installation of terminators at both ends of the trunk line
• Excessive noise
Node Address Duplication
Error

7-segment
F0

MS indicator
---

NS indicator
Red (lit)

Error log (Hex)
0211

Likely Cause
The master’s node address is also set on another node.

209

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators
DeviceNet Unit Response
Records the error in the error log.

• The Unit will go off–line and communications will be disabled. Error
responses will be returned to all communications requests.
• The exchange of data with the CPU Unit will continue.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 01 (the Node Address Duplicated/Bus Off Flag) will
be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 06 of n+10 (the Unit Error Flag and Duplicated Node Address
Flag) will be ON.
Correction
Check the node addresses set on other nodes in the network. Correct the settings to eliminate the duplication and restart the DeviceNet Units.
Bus Off Detected
7-segment
F1

MS indicator
---

NS indicator
Red (lit)

Error log (Hex)
0340

Likely Cause
A Bus Off condition was detected.
DeviceNet Unit Response
Records the error in the error log.
• The Unit will go off–line and communications will be disabled. Error
responses will be returned to all communications requests.
• The exchange of data with the CPU Unit will continue.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 01 (the Node Address Duplicated/Bus Off Flag) will
be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 05 of n+10 (the Unit Error Flag and Bus Off Flag) will be ON.
Correction
Check the following:
• Matching master and slave baud rates
• Proper cable lengths (trunk and branch lines)
• Broken or loose cables
• Installation of terminators at both ends of the trunk line
• Excessive noise

Memory Access Errors
Message Monitoring
Timer List Logic Error

7-segment
E6

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
021A

Likely Cause
There is an error in the contents of the message monitoring timer list stored in
non-volatile memory.

210

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators
DeviceNet Unit Response

Records the error in the error log.
Operation will continue using the default message monitoring timer values.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 03 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 13 of n+10 (the Unit Error Flag and Incorrect Message Monitoring
Timer List Data Flag) will be ON.
Correction
Use the Configurator to register the message monitoring timer list again.
Slave Scan List Logic
Error

7-segment
E7

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
021A

Likely Cause
There is an error in the contents of the slave scan list stored in non-volatile
memory.
DeviceNet Unit Response
Records the error in the error log.
• The slave remote I/O communications will be stopped.
• Message processing and the exchange of data with the CPU Unit will
continue. Normal operation will resume when the slave scan list is written
normally. (Start the slave remote I/O communications.)
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 03 of n+10 (the Unit Error Flag and Slave Error Flag) and bit 04 of
n+14 (Invalid Setup Data Flag) will be ON.
Correction
Disable the slave, reset the allocations, and the enable the slave again or use
the Configurator to reset the slave scan list.
Master Scan List Logic
Error

7-segment
E8

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
021A

Likely Cause
There is an error in the contents of the master scan list stored in non-volatile
memory.
DeviceNet Unit Response
Records the error in the error log.
• The master remote I/O communications will be stopped.
• Message communications and the exchange of data with the CPU Unit as
a slave will continue. Normal operation will resume when the master scan
list is written normally. (Start the master remote I/O communications.)
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 03 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 01 of n+10 (the Unit Error Flag and Master Function Error Flag)
and bit 04 of n+12 (the Invalid Scan List Data Flag) will be ON.

211

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators
Correction

Clear the scan list and register the scan list again or use the Configurator to
reset the master scan list.
Memory Access Error
7-segment
E9

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
0602

Likely Cause
An error occurred in the Unit’s non-volatile memory itself. This error will occur
in the following cases.
1,2,3...

1. An error occurs reading the identity information during initialization
2. All 64 error log records cannot be used during initialization or registering
an error log record
3. An error occurs while reading or writing the error log
4. An error occurs while reading or writing the master function enabling data
or the master scan list
5. An error occurs while reading or writing the slave function enabling data or
the slave scan list
6. An error occurs while reading or writing the message monitoring timer
7. An error occurs while reading or writing the communications cycle time set
value
8. An error occurs while reading the identity information during Identity object
server processing

Note This error does occur for checksum errors while reading data.
DeviceNet Unit Response
Registers an error record with error code 0602 in the RAM error log area.
For error 1:
Normal operation continues
For error 2 or 3:
Remaining writes to EEPROM are all ignored. Other than that, normal operation continues. (Error records continue to be written to RAM.)
For error 4:
The master remote I/O communications are stopped. Other operations continue.
For error 5:
The slave scanning is stopped and other operations continue.
For error 6:
The default values are used for the message monitoring timer and operation
continues.
For error 7:
The communications cycle time is set automatically and operation continues.
For error 8:
Operation continues.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 00 (the Incorrect Switch Settings/EEPROM Error
Flag) will be ON.

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Troubleshooting with the DeviceNet Unit Indicators
CIO Area Flags Allocated to DeviceNet Unit

Bits 00 and 04 of n+10 (the Unit Error Flag and Unit Memory Error Flag) will
be ON.
Correction
Replace the Unit if the error recurs.

CPU Unit Exchange Errors
Unit Number duplication
7-segment
H1

MS indicator
Red (flashing)

NS indicator
OFF

Error log (Hex)
---

Likely Cause
The unit number is duplicated on another Unit.
DeviceNet Unit Response
Stops operation.
Correction
Set the unit numbers correctly and restart the DeviceNet Units.
CPU Unit Faulty (H2)
7-segment
H2

MS indicator
Red (flashing)

NS indicator
OFF

Error log (Hex)
---

DeviceNet Unit Response
Stops operation.
Correction
Replace the CPU Unit if the error recurs when the CPU Unit is restarted.
DeviceNet Unit Faulty
7-segment
H3

MS indicator
Red (lit)

NS indicator
OFF

Error log (Hex)
---

DeviceNet Unit Response
Stops operation.
Correction
Replace the DeviceNet Unit if the same error recurs when the Unit is mounted
to another CPU Unit.
Node Address Setting
Error

7-segment
H4

MS indicator
Red (flashing)

NS indicator
OFF

Error log (Hex)
---

Likely Cause
The node address set on the rotary switches is out-of-range (64 or higher.)
DeviceNet Unit Response
Stops operation.
Correction
Set the node address correctly and restart the DeviceNet Units.
Communications Speed
Setting Error

7-segment
H5

MS indicator
Red (flashing)

NS indicator
OFF

Error log (Hex)
---

Likely Cause
The communications speed is set incorrectly.

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Troubleshooting with the DeviceNet Unit Indicators
DeviceNet Unit Response
Stops operation.
Correction

Set the communications speed correctly and restart the DeviceNet Units.
CPU Unit Faulty (H6)
7-segment
H6

MS indicator
Red (flashing)

NS indicator
OFF

Error log (Hex)
000F

DeviceNet Unit Response
Records the error in the error log. (The time information is set to all zeroes.)
Stops operation.
Correction
Replace the CPU Unit if the error recurs when the CPU Unit is restarted.
I/O Table Not Registered
7-segment
H7

MS indicator
Red (flashing)

NS indicator
OFF

Error log (Hex)
0006

Likely Cause
The CPU Unit’s I/O table is not registered.
DeviceNet Unit Response
Records the error in the error log.
Stops operation.
Correction
Create the I/O table.
CPU Unit Memory Faulty
7-segment
HA

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
0012

Likely Cause
A parity error occurred while reading the routing table.
DeviceNet Unit Response
Records the error in the error log and continues processing
The routing table is treated as missing.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 03 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 12 of n+10 (the Unit Error Flag and Routing Table Error Flag) will
be ON.
Correction
Register the routing table in the CPU Unit again and restart the CPU Unit.
Replace the CPU Unit if the error recurs.
CPU Unit Faulty (Hb)
7-segment
Hb

MS indicator
Red (flashing)

NS indicator
---

Likely Cause
A timeout occurred while reading the routing table.

214

Error log (Hex)
0011

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators
DeviceNet Unit Response

Continues processing but data exchange with the CPU Unit is stopped.
The routing table is treated as missing.
Records the error in the error log.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 03 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 12 of n+10 (the Unit Error Flag and Routing Table Error Flag) will
be ON.
Correction
Register the routing table in the CPU Unit again and restart the CPU Unit.
Replace the CPU Unit if the error recurs.
Routing Table Logic Error
7-segment
HC

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
021A

Likely Cause
There is an error in the contents of the routing table.
DeviceNet Unit Response
Records the error in the error log.
The routing table is treated as missing and processing continues.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 03 (the Structure Error Flag) will be ON.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 12 of n+10 (the Unit Error Flag and Routing Table Error Flag) will
be ON.
Correction
Refer to 1-6-3 Creating Routing Tables. Set the routing table in the CPU Unit
correctly and restart the DeviceNet Units.
I/O Refresh Error
7-segment
Hd

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
0347

Likely Cause
The I/O areas set in the master scan list or slave scan list do not exist in the
CPU Unit. This error can occur when the Unit is mounted to a different CPU
Unit with a different number of EM banks or EM that has been converted to
file memory.
Note This error may occur during remote I/O communications, too.
DeviceNet Unit Response
Records the error in the error log.
Stops remote I/O communications for the function (master or slave) using the
non-existent area.
There is a possibility that this error will occur again. If it does occur again,
restart remote I/O communications to return the system to normal operation.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
Bit 14 (Error Flag) and bit 03 (the Structure Error Flag) will be ON.

215

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators
CIO Area Flags Allocated to DeviceNet Unit

Bit 00 of n+10 (Unit Error Flag) will be ON together with one of the following
combinations:
• Bit 05 of n+12 (the Master I/O Refresh Error Flag) and bit 01 of n+10 (the
Master Function Error Flag) ON.
• Bit 05 of n+14 (Remote I/O Refresh Error Flag) and bit 03 of n+10 (the
Slave Error Flag) ON.
Correction
Check the master scan list and slave scan list and reset with a correct allocation.
CPU Unit Service
Monitoring Error

7-segment
HE

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
0002

Likely Cause
Servicing from the CPU Unit is not at fixed intervals. Servicing is normally
monitored at 11 s.
DeviceNet Unit Response
• Records the error in the error log.
• Stops master and slave remote I/O communications.
Performs the following processing if it receives FINS frames that must be
passed along to the CPU Unit:
• Returns an error response (0302 Hex) to commands requiring a response.
• Discards other frames and stores an error record (010B Hex) in the error log.
Note There is a possibility that this error will occur again. If it does occur
again, restart remote I/O communications to return the system to
normal operation.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
There is no status notification because communications with the CPU Unit are
disabled.
CIO Area Flags Allocated to DeviceNet Unit
There is no status notification because communications with the CPU Unit are
disabled.
Correction
Inspect the CPU Unit’s operating environment.
CPU Unit Watchdog Timer
Error

7-segment
HF

MS indicator
Red (flashing)

NS indicator
---

Error log (Hex)
0001

Likely Cause
An error occurred in the CPU Unit.
Note The CPU Unit’s watchdog timer error can occur during initialization.
DeviceNet Unit Response
• Records the error in the error log.
• Stops master and slave remote I/O communications.
Performs the following processing if it receives FINS frames that must be
passed along to the CPU Unit:

216

Section 9-1

Troubleshooting with the DeviceNet Unit Indicators

• Returns an error response (0302 Hex) to commands requiring a response.
• Discards other frames and stores an error record (010B Hex) in the error log.
Flags Allocated for C200H DeviceNet Master Unit (CIO n+24)
There is no status notification because communications with the CPU Unit are
disabled.
CIO Area Flags Allocated to DeviceNet Unit
There is no status notification because communications with the CPU Unit are
disabled.
Correction
Replace the CPU Unit.
CPU Unit Fatal Error
7-segment
---

MS indicator
---

NS indicator
---

Error log (Hex)
---

DeviceNet Unit Response
Output data is set to 0. (With the master, these are output bits. With the slave,
these are input bits to the other master.)
Output OFF Error
7-segment
---

MS indicator
---

NS indicator
---

Error log (Hex)
---

Likely Cause
The Output OFF Bit (A50015) was turned ON in the CPU Unit.
DeviceNet Unit Response
Output data is set to 0. (With the master, these are output bits. With the slave,
these are input bits to the other master.)

Slave Errors
Remote I/O
Communications Error

7-segment
L9

MS indicator
---

NS indicator
Red (flashing)

Error log (Hex)
0345

Likely Cause
A timeout occurred during remote I/O communications using the slave function.
DeviceNet Unit Response
Records the error in the error log.
If slave has outputs, the status of those outputs is determined by the hold/
clear outputs setting for communications errors.
CIO Area Flags Allocated to DeviceNet Unit
Bits 00 and 03 of n+10 (the Unit Error Flag and Slave Error Flag) and bits 02
and 03 of n+14 (the Remote I/O Communications Error Flag for OUT1/IN1
and Remote I/O Communications Error Flag for OUT2/IN2) will be ON.
Correction
Check the following:
• Matching master and slave baud rates
• Proper cable lengths (trunk and branch lines)
• Broken or loose cables

217

Section 9-2

Error Log Functions
• Installation of terminators at both ends of the trunk line
• Excessive noise

Unit Errors
Special Unit Error
7-segment
OFF

MS indicator
Red (lit)

NS indicator
OFF

Error log (Hex)
0601

DeviceNet Unit Response
Records the error in the error log.
Stops the Unit.
Correction
Restart the CPU Unit. Replace the DeviceNet Unit if the error recurs.

9-2

Error Log Functions
Errors detected by the DeviceNet Unit are stored in the error log along with
the date and time of their occurrence. The error log can be read, cleared, and
monitored using FINS commands or a Configurator.

9-2-1

Error Log Table

Each time an error occurs, one error record is recorded in the DeviceNet
Unit’s RAM error log table. The table can record up to 64 records. If another
error occurs when the table is full, the oldest record will be erased to make
room for the new error record.
The error log table records the following information.
• Error code
• Detail code
• Time of occurrence (The CPU Unit’s time is used for the time stamp.)

Error Log Storage Area

When an error is detected, information on the error and the time stamp are
stored in the Unit’s internal RAM as an error log record. Serious errors are
recorded in EEPROM as well as RAM. The error log records in EEPROM are
retained even when the Unit’s power is turned OFF or the Unit is restarted.
The error log records in EEPROM are copied to RAM when the DeviceNet
Unit is turned ON.
When the error log is read with a FINS command or from the Configurator,
only the error log records in RAM are read. When the error log is cleared with
a FINS command or from the Configurator, the error log records in RAM and
EEPROM are erased.
Note Refer to 9-2-2 Error Codes and Detail Codes for a table listing the error codes.

Reading and Clearing the
Error Log

The error log table can be read or cleared by sending a FINS command to the
DeviceNet Unit. Use the DeviceNet Unit’s unit address as the FINS command’s destination unit address. (The unit address is the unit number+10
Hex.)
Refer to the SYSMAC CS/CJ Series Communication Commands Reference
Manual (W342) for details on using the FINS commands. Refer to the Appendix E FINS Commands and Responses for DeviceNet Units for details on
FINS commands addressed to the DeviceNet Unit.

218

Section 9-2

Error Log Functions

When using the Configurator, the error log can be monitored with the master
error history read operation. With the Configurator, the error log can only be
monitored and the data cannot be saved.
Time Information

The CPU Unit’s time information is used for the time stamps in the DeviceNet
Unit’s error log records. If the time information cannot be read from the CPU
Unit, the time stamp will contain all zeroes.
The DeviceNet Unit’s time stamps will not be correct or consistent unless the
time has been correctly in the CPU Unit. Moreover, if the battery is replaced in
a CS/CJ-series CPU Unit, the time must be set again the next time that power
is turned ON.

9-2-2

Error Codes and Detail Codes
Error

Error
code
(Hex)

Detail code
First byte

Second byte
00 Hex

Record
stored in
EEPROM

0001

CPU Unit watchdog timer error

00 Hex

0002

CPU Unit service monitoring error (The servicing time from the CPU Unit is not fixed.)

Monitoring time (ms)

Yes

0006

Other CPU error

Bit 14 ON:
Bit 11 ON:
Other bits:

Yes

000F

CPU Unit initialization error

00 Hex

Yes

0011

Event timeout

MRC

SRC

Yes

0012

CPU Unit memory error

01 Hex: Read error
02 Hex: Write error

03 Hex: Routing table
Yes
04 Hex: CPU Bus Unit settings error
05 Hex: Special Unit CIO
or DM allocation

Duplicate unit number setting
Unit not in registered I/O table
Reserved for system

Yes

219

Section 9-2

Error Log Functions
Error
code
(Hex)
0101
0105
0106
0107
0108
0109
010B

Error

Detail code
First byte

Second byte

Transmission failed because the local node is
not participating in the network.

FINS message communications command:
Bit 15: OFF
Bits 14 to 8: SNA
Transmission failed because of a node address
Bits 7 to 0: SA1
setting error.
FINS
message communications response:
Transmission failed because of a node address
Bit 15: ON
duplication error.
Bits 14 to 8: DNA
Transmission failed because the other node is
Bits 7 to 0: DA1
not participating in the network.
Explicit message communications command:
Transmission failed because there is no Unit
Bit 15: OFF
with the specified unit number.
Bits 14 to 8: 0
Bit 7: ON
Transmission failed because the other node is
Bits 6 to 0: Node address of command source
busy.
Explicit message communications response:
Transmission failed because of a CPU Unit
error. Frame discarded due to one of the follow- Bit 15: ON
Bits 14 to 8: 0
ing:
Bit 7: ON
• A cyclic service monitoring timeout occurred.
Bits 6 to 0: Node address of command source
• A CPU Unit watchdog timer error occurred.
• Another CPU Unit error occurred.

010D

Transmission failed because the destination
address is not registered in the routing table.

010E

Transmission failed because the routing table
has not been registered.

010F

Transmission failed because of a routing table
error.

0110

Transmission failed because of too many repetitions.

0111

Transmission failed because the command
exceeded the max. command length.

0112

Transmission failed because of a header error.

0117

Packet discarded because the internal reception buffer is full.

Record
stored in
EEPROM
No

0118

Illegal packet discarded.

0120

Unexpected routing error

0123

Packet discarded because the internal transmission buffer is full.

0124

Routing failed because maximum frame length
was exceeded.

0125

Packet discarded because of response timeout.

021A

Setting table logic error

00 Hex

03 Hex: Routing table
0A Hex: Master scan list
0B Hex: Slave scan list
0C Hex: Message monitoring timer list

Yes

0211

Node address duplication (cause)

00 Hex

Local node address

0300

Packet discarded because of parameter error.

Same as the code (such as 0101 Hex) in the discarded FINS/explicit message packet.

0340

Bus Off detected

00 Hex

0341

Network power supply error

00 Hex

0342

Transmission timeout

00 Hex

220

00 Hex

Section 9-2

Error Log Functions
Error
code
(Hex)

Error

Detail code
First byte

Second byte

Record
stored in
EEPROM

0343

Structure error

01 Hex: I/O area duplication
02 Hex: I/O area range
exceeded
03 Hex: Unsupported
slave

Slave’s node address

0344

Verification error

01 Hex: Non-existent
slave
02 Hex: Illegal header
03 Hex: Illegal device
type
04 Hex: Illegal product
code
05 Hex: Unsupported
connection
06 Hex: I/O size mismatch
07 Hex: Illegal connection path

Slave’s node address

0345

Remote I/O communications error

01 Hex: Master
02 Hex: Slave

Master:
Slave’s node address
Slave:
Master’s node address

0346

Remote I/O communications stopped because
of a remote I/O communications error.

01 Hex: Remote I/O
Remote I/O comm. error:
communications error
Slave’s node address
02 Hex: Network power Power supply error:
supply error
Local (master’s) node
address
03 Hex: Transmission
timeout
Transmission timeout:
Local (master’s) node
address

0347

I/O refreshing error

01 Hex: Master
02 Hex: Slave

0348

Message discarded because a new request
was received.

Same as the code (such as 0101 Hex) in the discarded FINS/explicit message packet.

No
Yes

0601

Special Unit error

Uncertain contents

0602

Special Unit memory error

01 Hex: Read error
02 Hex: Write error

00 Hex

06 Hex: Error log
09 Hex: Identity data
0A Hex: Master scan list
0B Hex: Slave scan list
0C Hex: Message monitoring timer list
0D Hex: Communications
cycle time setting

Yes
(See
note.)

Note The error information is not written to EEPROM when a memory error occurs
in the error log area (EEPROM).

221

Section 9-3

Troubleshooting

9-3
9-3-1

Troubleshooting
CPU Unit’s ERR/ALM Indicator Lit or Flashing
Use the following table to troubleshoot the network when the DeviceNet Unit
is mounted and the CPU Unit’s ERR/ALM indicator is lit or flashing.
Error

Probable cause

An I/O verification error occurred.

• Make sure that the Unit is connected properly.
• Check the I/O table with the I/O Table Verification operation and correct it
if necessary. After correcting it, perform the I/O Table Create operation.

A CPU Bus Unit setting error occurred.

• The CPU Bus Unit model registered in the I/O table does not match the
model of CPU Bus Unit actually mounted. Check the I/O table with the I/O
Table Verification operation and correct it if necessary.
• After correcting the I/O table, perform the I/O Table Create operation.

A CPU Bus error occurred.

• Make sure that the Unit is connected properly.
• Restart the Unit. Replace the Unit if it doesn’t restart.

An I/O Bus error occurred.

• Make sure that the Unit is connected properly.
• Restart the Unit. Replace the Unit if it doesn’t restart.

Note Refer to the CS1 Series CPU Unit Operation Manual (W339) or the CJ Series
CPU Unit Operation Manual (W393) for more details on these errors.

9-3-2

Remote I/O Communications Disabled
Use the following table to troubleshoot the network when remote I/O data
communications won’t start. (The I/O Data Communications Flag remains
OFF in Master Status 1.)
Error

Probable cause

All of the DeviceNet Unit’s indicators are OFF.

• Check whether power is being supplied to the PC.
• Check whether the DeviceNet Unit is mounted in the Backplane correctly.
• When a watchdog timer (WDT) error has occurred in the PC, follow
the procedures described in the PC’s manual to correct the problem.
• All of a CS1W-DRM21 or CJ1W-DRM21 Unit’s indicators will be OFF
when a CPU Bus Unit error has occurred. Check for a CPU Bus Unit
error.
• Restart the Unit. Replace the Unit if it doesn’t restart.

The DeviceNet Unit’s MS indicator is ON and
green, but the NS indicator remains OFF.
(The NS indicator normally goes ON about 2 s
after the MS indicator.)

• If the DeviceNet Unit’s 7-segment display is displaying an error code,
refer to the tables in 9-1 Troubleshooting with the DeviceNet Unit Indicators.
• Make sure that the master’s unit number setting is correct.
• Make sure that the unit number is not duplicated on another Special
Unit.
• Check the I/O table with the I/O Table Verification operation and correct it if necessary. After correcting it, perform the I/O Table Create
operation.
Restart the Unit. Replace the Unit if it doesn’t restart.

222

Section 9-3

Troubleshooting
Error

Probable cause

The DeviceNet Unit’s MS indicator is ON and
green, but the NS indicator continues to flash
green.
(The NS indicator normally goes ON 2 s after
the MS indicator.)

• If the DeviceNet Unit’s 7-segment display is displaying an error code,
refer to the tables in 9-1 Troubleshooting with the DeviceNet Unit Indicators.
• Restart the Unit. Replace the Unit if it doesn’t restart.

The DeviceNet Unit’s MS and NS indicators are • Check that the DeviceNet Unit’s baud rate matches the baud rates set
on all of the slaves. If they don’t match, set all of the baud rates to the
ON and green, but the 7-segment display continsame value.
ues to flash the master’s node address.
(The node address normally stops flashing
• Make sure that there are121-Ω terminators connected at both ends
within 8 s after the NS lights.)
of the trunk line. Connect 121-Ω terminators if the wrong resistance
is being used.
• Check whether all of the slaves’ settings are correct.
• Check whether the communications cables are wired correctly.
• Check whether the power supply cables and power supply are wired
and set correctly.
• Check for broken wires in the communications and power supply cables attached to the connectors.
• Check whether the slaves are operating properly.
When an OMRON slave is being used, refer to the DeviceNet Slaves
Operation Manual (W347).
• If another company’s slave is being used, refer to that slave’s user’s
manual.

9-3-3

I/O Link Problems
Use the following table to troubleshoot I/O Link problems.
Error

Probable cause

The I/O isn’t simultaneous.

Observe the following precautions when writing application programs:
• The simultaneity of node-units of data is ensured between the PC and
DeviceNet Unit.
• In OMRON slaves, the simultaneity of word-units of data is ensured.
• If another company’s slave is being used, refer to that slave’s user’s
manual for details.

At startup, OFF outputs are output from the
slaves.

When the master is operating in scan list enabled mode and the PC is
set to maintain the status of I/O area bits, those held output points will
be output from the output slaves at startup.
Be sure to perform the Create Scan List operation and operate the
master with the scan list enabled.
Refer to the CS1 Series CPU Unit Operation Manual (W339) or the CJ
Series CPU Unit Operation Manual (W393) for details on maintaining I/
O area data with the IOM Hold Bit.

223

Section 9-3

Troubleshooting

9-3-4

Communications Error Operation Settings
Use the following table to correct problems with the DIP switch setting for continuing/stopping communications for errors.
Error

Probable cause

Communications are stopped even though
there is no communications error.

When pin 3 on the DIP switch is ON, communications will be stopped if a
communications error, transmission timeout, or network power supply error
occurs.
While communications are stopped, the 7-segment displays will alternately
display error code A0 and the error code of the communications error that
caused the stoppage.
After a network power supply error or transmission timeout is corrected, the
indicators will show just the communications stoppage code (A0).

• When communications can’t be restarted with slaves that were communiCommunications are stopped by the DIP
cating normally before the stoppage, stop the communications again.
switch setting, but don’t resume after togCheck that the slave has started up and perform the “clear communicagling the Clear Communications Error Stoptions error stoppage” operation.
page Bit.
• It may be necessary to perform the operation twice if the network contains
another company’s slave that take a long time to join the network.

9-3-5

Scan List Problems
Use the following table to troubleshoot scan list problems.
Error

Probable cause

A scan list couldn’t be created by the “create scan list” operation.
A scan list couldn’t be cleared by the “clear
scan list” operation.

Neither the create scan list nor clear scan list operations can be performed
until the I/O Data Communications flag goes ON. (The I/O Data Communications flag will be OFF for a short time after the power is first turned ON
and after the scan list clear operation is executed.)
Make sure that the I/O Data Communications flag is ON before attempting
to execute the create scan list or clear scan list operations.

Restart the DeviceNet Unit, execute the clear scan list operation, and then
The “create scan list” or “clear scan list”
operation was executed, but the master’s 7- the create scan list operation if necessary.
segment displays still display “- -”.
Replace the DeviceNet Unit if this doesn’t correct the problem.
(The “- -” display usually lasts for 1 s after
the “create scan list” operation or 0.1 s after
the “clear scan list” operation.)

224

Section 9-4

Maintenance and Replacement

9-4

Maintenance and Replacement
This section describes the routine cleaning and inspection recommended as
regular maintenance as well as the Unit replacement procedure required if a
DeviceNet Unit fails.

9-4-1

Cleaning
Clean the DeviceNet Units regularly as described below in order to keep the
network in its optimal operating condition.
• Wipe the Unit daily with a dry, soft cloth.
• When a spot can’t be removed with a dry cloth, dampen the cloth with a
neutral cleanser (2% solution), wring out the cloth, and wipe the Unit.
• A smudge may remain on the Unit from gum, vinyl, or tape that was left on
for a long time. Remove the smudge when cleaning.

!Caution
9-4-2

Never use volatile solvents such as paint thinner, benzene, or chemical wipes.
These substances could damage the surface of the Unit.

Inspection
Be sure to inspect the system periodically to keep it in its optimal operating
condition. In general, inspect the system once every 6 to 12 months, but
inspect more frequently if the system is used with high temperature or humidity or under dirty/dusty conditions.

Inspection Equipment

Prepare the following equipment before inspecting the system.
Required Equipment
Have a standard and Phillips-head screwdriver, multimeter, alcohol, and a
clean cloth.
Equipment Required Occasionally
Depending on the system conditions, a synchroscope, oscilloscope, thermometer, or hygrometer (to measure humidity) might be needed.

Inspection Procedure

Check the items in the following table and correct any items that are below
standard.
Item
Environmental
conditions

Installation

Standard

Equipment

Ambient and cabinet temperature 0°C to 55°C

Thermometer

Ambient and cabinet humidity
(with no condensation or icing)

Hygrometer

10% to 90%

Dust/dirt accumulation

None

---

Are the Units installed securely?

No looseness

---

Are the communications connec- No looseness
tors fully inserted?

---

Are the external wiring screws
tight?

No looseness

---

Are the connecting cables
undamaged?

No damage

---

225

Section 9-4

Maintenance and Replacement

9-4-3

Replacing Faulty Units
Replace a faulty DeviceNet Unit as soon as possible. Refer to the DeviceNet
Slaves Operation Manual (W347) for details on replacing slaves. We recommend having spare Units available to restore network operation as quickly as
possible.

Precautions

Observe the following precautions when replacing a faulty Unit.
• After replacement make sure that there are no errors with the new Unit.
• When a Unit is being returned for repair, attach a sheet of paper detailing
the problem and return the Unit to your OMRON dealer.
• If there is a faulty contact, try wiping the contact with a clean, lint-free
cloth dampened with alcohol.
Note To prevent electric shock when replacing a Unit, be sure to stop communications in the network and turn OFF the power supplies to all of the nodes (master and slaves) before removing the faulty Unit.

Settings after Replacing
DeviceNet Units

When the master is being used, the scan list (network file) must be registered
after replacing the DeviceNet Unit.
All of the settings data stored in the DeviceNet Unit can be saved to the CPU
Unit’s Memory Card1 and later read from the Memory Card2. It will be much
easier to replace the Unit if you save all of the settings data when the Unit is
operating normally.

Note

1. Toggle (OFF to ON) the Unit Setup File Backup Switch (word n+1, bit 15).
2. Toggle (OFF to ON) the Unit Setup File Restore Switch (word n+1, bit 14).
3. The backup file is saved to the CPU Unit’s Memory Card with the filename
DNnnBKUP.dvf. (The number “nn” is the unit number in 2-digit hexadecimal.)
Default Remote I/O Allocations
Turn ON power to all slaves and then turn ON the Scan List Enable Switch (bit
00). The scan list will be registered.
User-set Remote I/O Allocations
The scan list can be written to the DeviceNet Unit from the CPU Unit’s Memory Card or a network file saved on a disk.
Using the Settings Data Stored in the CPU Unit’s Memory Card
Use the following procedure to write all of the settings data from the Memory
Card to the DeviceNet Unit.

1,2,3...

1. Turn ON power to the PC.
2. Switch the CPU Unit to PROGRAM mode.
3. Toggle (OFF to ON) the Unit Setup File Restore Bit (word n+1, bit 14).
Using a Network File Stored on a Floppy Disk or Hard Disk
Use the following procedure to write the settings to the DeviceNet Unit from a
network file saved on a disk.

1,2,3...

1. Turn ON power to the DeviceNet Unit and the Configurator.
2. Place the Configurator online and read the network file that was previously
saved.
3. Use the Edit Device Parameters operation, specify the DeviceNet Unit that
has been replaced, and write the settings from the network file to the DeviceNet Unit.

226

Maintenance and Replacement

Section 9-4

Creating a New Network File
Use the following procedure to write the settings to the DeviceNet Unit from a
network file saved on a disk.
1,2,3...

1. Turn ON power to the DeviceNet Unit, slaves, and the Configurator.
2. Place the Configurator online and display the Device List.
3. Specify the DeviceNet Unit that has been replaced, and use the Edit Device Parameters operation to register slaves and allocate I/O.
4. Write the settings to the devices.

Note

1. When using user-set remote I/O allocations, always save the network file
to a floppy disk or hard disk to restore operation quickly if the DeviceNet
Unit needs to be replaced.
2. When the CPU Unit is replaced, be sure that all data in the DM Area, HR
Area, and other memory areas is transferred to the new CPU Unit before
starting operation.

227

Appendix A
Allocation Differences from C200H
DeviceNet Master Units
The following table shows the CS1W-DRM21/CJ1W-DRM21 DeviceNet Unit allocation areas that correspond
to the C200HW-DRM21-V1 DeviceNet Master Unit allocation areas.
Note The following table does not include the allocation areas that exist only in CS/CJ-series DeviceNet Units.
Refer to this table when using ladder programs in the CS1W-DRM21/CJ1W-DRM21 that have been used in
C200HW-DRM21-V1 DeviceNet Master Units and make adjustments as required.
Use the CX-Programmer replacement operation to change ladder program addresses. When using a CX-Programmer Ver. 1.2 or earlier, use the global replace utility function to globally replace addresses.

Software Switches
Unit No.: Set on rotary switches on front panel (0 to 15).
Name

C200H DeviceNet Master
Unit
Word address
CS/CJ
Series

Bit

C200HX/
HG/HE,
C200HS

CS/CJ-series
DeviceNet Unit
CS/CJseries
word
address

Contents for CS/CJseries DeviceNet Unit

Bit

Differences from C200Hseries DeviceNet Master
Unit

OFF → ON
Registers to scan list the
slaves recognized during
operation in scan list disabled mode and starts
operation in scan list
enabled mode (PC Unit in
PROGRAM mode).

No differences.
Different usage: Switch
returns to OFF when processing completed.

OFF → ON
Disables scan list registration and starts operation in
disabled mode (PC Unit in
PROGRAM mode).

No differences.
Different usage: Unit switch
returns to OFF when processing completed.

OFF → ON
Restarts remote I/O communications stopped with
communications error
based on settings.

Includes bit 03 remote I/O
communications start
switch functions in CS/CJseries DeviceNet Unit.
Different usage: Unit switch
returns to OFF when processing completed.

Remote I/O
Communications
Start Switch

OFF → ON
Starts communications

Includes bit 02 communications error stop clear switch
functions in CS/CJ-series
DeviceNet Unit.
Different usage: Unit switch
returns to OFF when processing completed.

Remote I/O
Communications
Stop Switch

OFF → ON
Different usage: Unit switch
Stops remote I/O communi- returns to OFF when processing completed.
cations

Scan List
Enable
Switch

IR 2000 + Unit No. 0 00
(10 × unit to 9: IR 100
No.)
+(10 × unit
No.)
Unit No. A
to F: IR 400
+(10 × unit
No. – 10)

CIO 1500 + 00
(25 × unit
No.)

Scan List
Clear
Switch

Remote I/O
Communications
Start Switch

229

Appendix A

Allocation Differences from C200H DeviceNet Master Units

Status Areas
Master Status Area 1
An area with the exact same bit configuration as Master Status area 1 used for C200H DeviceNet Master Units,
was set up. This area is called the Master Replacement Status 1.
• The following table compares the C200H DeviceNet Master Unit Master Status Area 1 and the CS/CJseries DeviceNet Unit Master Replacement Status 1.
Names for
C200H
DeviceNet
Master
Unit
Master
Status
Area 1

C200H DeviceNet Master Unit
Word address
CS/CJ
Series

C200HX/
HG/ HE,
C200HS

Switch Set- IR 2001+
ting Error or (10 × unit
No.)
EEPROM
Error Flag

Unit No. 0
to 9: IR
101+(10 ×
unit No.)
Unit No. A
to F: IR
401+(10 ×
unit No. –
10)

Bit

Names for
CS/CJseries
DeviceNet
Unit Master
Replacement Status 1

CS/CJ-series
DeviceNet Unit
CS/CJseries
word
address

Details and CS1W-DRM21/CJ1WDRM21 status

Bit

This is the same as a Unit memory
error (word n+10, bit 04).
Note This bit is also used for incorrect switch settings for the
C200HW-DRM21-V1. The Unit
will not start if the switch settings are incorrect.

Node
Address
Duplicated/
Bus Off
Flag

This bit turns ON if any one of the following flags turns ON:
• Node address duplicated (word
n+10, bit 06)
• Bus Off (word n+10, bit 05)

Reserved
for system
use

Reserved by system

Configuration Error
Flag

This bit turns ON if any of the following
flags turn ON:
• Routing table error (word n+10, bit
12)
• Invalid message timer list (word
n+10, bit 13)
• Invalid Scan List Data (word n+12,
bit 04)
• Remote I/O refresh error (word
n+12, bit 05)
Note The C200HW-DRM21-V1 does
not support slave communications. Scan list data errors for
slave communications are not
relevant.

Structure
Error Flag

This is the same as the Structure Error
Flag in word n+12, bit 01.

Send Error
Flag

This bit turns ON if any one of the following bits turns ON:
• Network power error (word n+10,
bit 07)
• Send timeout (word n+10, bit 08)

Unit Error
Flag

Reserved
for system
use

Node
Address
Duplicated/
Bus Off
Flag

230

CIO 1524+
(25 × unit
No.)

Appendix A

Allocation Differences from C200H DeviceNet Master Units
Names for
C200H
DeviceNet
Master
Unit
Master
Status
Area 1

C200H DeviceNet Master Unit

CS/CJ
Series

C200HX/
HG/ HE,
C200HS

Communications
Error Flag

IR 2001+
(10 × unit
No.)

Unit No. 0
to 9: IR
101+(10 ×
unit No.)
Unit No. A
to F: IR
401+(10 ×
unit No. –
10)

Word address

Bit

Names for
CS/CJseries
DeviceNet
Unit Master
Replacement Status 1

CIO 1524+
(25 × unit
No.)

Bit

This is the same as the Remote I/O
Communications Error Flag (word
n+12, bit 02).

Verification
error

This is the same as the Verification
Error Flag in word n+12, bit 00.

I/O Data
Communications Not
Running
Flag

This operates in the reverse way of
the Remote I/O Communications Flag
(word n+11 bit 01).

Scan List
Operation
Completed
Flag

Reserved
for system
use

---

Scan List
Operation
Error Flag

Reserved
for system
use

---

Communications
Error Stop
Cleared
Flag

Reserved
for system
use

---

Message
Communications
Enable Flag

Message
Communications Permitted Flag

The same as the Online Flag in word
n+11, bit 00.
Note When executing message communications instructions
(SEND/RECV/CMND) from the
ladder program, use an AND of
input conditions for the Network
Communications Enabled Flag
in the CPU Unit (A20200 to
A20207) and this bit.

Scan List
Disabled
Flag

The same as operation as the Scan
List Disabled Flag (word n+11, bit 04).

Error Flag

This bit turns ON if bit 00, 01 or 03 to
07 in this word (n+24) turns ON.

I/O Data
Communications Flag

I/O Data
Communications
Flag

The same as I/O Data Communications Flag (word n+12 bit 15).

I/O Data
Communications Not
Running
Flag

Communications
Error Flag

CS/CJseries
word
address

Details and CS1W-DRM21/CJ1WDRM21 status

Verification
Error Flag

CS/CJ-series
DeviceNet Unit

231

Appendix A

Allocation Differences from C200H DeviceNet Master Units

Master Status Area 2
Name

C200H DeviceNet Master Unit
Word address

Error History
Flag

Bit

CS/CJ-series
DeviceNet Unit

Contents for CS/CJseries DeviceNet Unit

Differences
from C200H
DeviceNet
Master Unit

Bit

CS/CJ Series C200HX/HG/
HE, C200HS

CS/CJ-series
word
address

D06032+ (2 × DM6032+ (2 × 00
unit No.)
unit No.)

CIO 1511 +
15
(25 × unit No.)

1: When error history is
stored in Master Unit
0: When error history is
not stored in Master Unit

No difference.

CIO 1513 +
08 to
(25 × unit No.) 15

1: When scan list has
been created using Configurator and operating in
scan list enabled mode
(user-set allocations)
0: When operating in scan
list disabled mode or when
operating in scan list
enabled mode based on
the scan list registered by
software switch settings
(fixed allocations)

Shown in 1byte code for
CS1WDRM21/
CJ1WDRM21

Contents for CS/CJseries DeviceNet Unit

C200H
DeviceNet
Master Unit

Master I/O
Allocation
Status

Communications Cycle Time Present Value
Name

C200H DeviceNet Master Unit
Word address
CS/CJ
Series

Communications cycle
time present
value

Bit

C200HX/HG/
HE, C200HS

D06033+ (2 × DM6033+ (2 × 00 to
unit No.)
unit No.)
15

CS/CJ-series
DeviceNet Unit
CS/CJ-series
word
address
m+16

Bit

00 to
15

Stored in
The present value of the
hexadecimal.
communications cycle
time is stored in 4-digit
BCD. The unit is ms. The
digits below decimal place
are rounded up.

Registered Slave Table
Name

C200H DeviceNet Master Unit
Word address

Registered slave
table

232

CS/CJ Series

C200HX/HG/HE,
C200HS

4 words starting
with 2002 + (10 ×
unit No.)

Unit No. 0 to 9: 4
words starting with
IR 102 +(10 × unit
No.)
Unit No. A to F: 4
words starting with
IR 402 +(10 × unit
No. – 10)

For CS/CJ-series
DeviceNet Unit
Bit

00 to
15

CS/CJ-series
word address
4 words starting
with n+16

C200H DeviceNet
Master Unit
Bit

00 to
15

No differences.

Appendix A

Allocation Differences from C200H DeviceNet Master Units

Normal Slave Table
Name

C200H DeviceNet Master Unit
Word address
CS/CJ Series

Normal
slave
table

4 words starting
with CIO 2006 +
(10 × unit No.)

For CS/CJ-series
DeviceNet Units
Bit

C200HX/HG/HE,
C200HS
Unit No. 0 to 9: 4 00 to
words starting with 15
IR 106 +(10 × unit
No.)
Unit No. A to F: 4
words starting with
IR 406 + (10 × unit
No. – 10)

Word address

C200H DeviceNet Master Unit

Bit

CS/CJ Series
4 words starting
with n+20

00 to
15

With the C200HW-DRM21-V1,
normal slave information is held,
and when remote I/O communications are started again, the information is cleared to OFF, even in
the following cases:
Network power supply error
Send timeout
Remote I/O communications
stopped
When remote I/O communications are stopped due to a communications error, only the bits for
the slaves that caused the stoppage will turn OFF. Also, the “corresponding Slave remote I/O
communications timeout” in the
detailed information for that slave
(m+37 to m+68 bit 11 or bit 03) will
turn ON. The communications timeout bits for all other slaves will
remain OFF.
For the CS1W-DRM21 or CJ1WDRM21, however, all normal slave
information will turn OFF when the
remote I/O communications are
stopped, including for a communications error.

Replacing Ladder Programs from C200HW-DRM21-V1
If ladder programs have already been created for C200H DeviceNet Master Unit (C200HW-DRM21-V1)
mounted to CS/CJ-series CPU Units, the ladder programs must be changed when replacing the C200HWDRM21-V1 with this Unit.

Remote I/O Communications and Status Monitor Ladder Programs
• When using a CX-Programmer Ver. 2.0, use its replacement function to globally replace addresses.
• When using a CX-Programmer Ver. 1.2 or earlier, use the global replace utility function to globally replace
addresses.

233

Appendix A

Allocation Differences from C200H DeviceNet Master Units
Replace the addresses as shown in the following table.
Area type
First word of IN area in fixed remote I/O allocations

C200HW-DRM21-V1
IR 350

First word of OUT area in fixed remote I/O alloca- Word 50
tions

IR 2000 +10 × unit
No.

Software switches

This Unit (CS1WDRM21)

Remarks

Completely compatiCan be allocated to
CIO 350 from Config- ble.
urator or in allocated
DM Area words
Completely compatiCan be allocated to
CIO 50 from Configu- ble.
rator or in allocated
DM Area words
CIO 1500 +25 × unit
No.

Only word address
changed.

Communications error stop clear

Bit 02

Remote I/O communications start

Bit 03

Remote I/O communications stop

Bit 04

IR 2000 +10 × unit
No.+ 1

CIO 1500 +25 × unit
No.+ 24

Only word address
changed.

Scan list registration
by Configurator

D06032+2 × unit
No.+1, bit 15

CIO 1500 +25 × unit
No.+ 13
Note: Allocated as
status code.

Cannot be accessed
from ladder program.

Error history

D06032+2 × unit
No.+1, bit 00

CIO 1500 +25 × unit
No.+bit 15 of 11

First word of registered slave table

IR 2000 +10 × unit
No.+2

CIO 1500 +25 × unit
No.+16

Only word address
changed.

First word of normal slave table

IR 2000 +10 × unit
No.+6

CIO 1500 +25 × unit
No.+20

Only word address
changed.

Master status area 1
Master status area 2

Message Communications in Ladder Programs
Instructions
Message communications instructions

C200HW-DRM21-V1
IOWR instructions

Instruction execution con- Message Communicaditions
tions Enabled Flag
(IR 2000 +10 × unit No.+
1, bit 12)

This Unit (CS1WDRM21)

Remarks

Change instructions and message
CMND instructions
(SEND/RECV also possi- data.
ble for FINS data communications)
AND condition for 1. Message Communications
Permitted Flag (CIO 1500
+25 × unit No.+24, bit 12)
and
2. Network Communications Enabled Flag
(A20200 to A20207: Correspond to ports 0 to 7)

Change execution conditions.
Note: The Message Communications
Permitted Flag (CIO 1500 +25 × unit
No.+ 24, bit 12) is the same even when
online as (CIO 1500 +25 × unit No.+
11, bit 00)

Note If there is a routing table in the CS/CJ-series CPU Unit, the DeviceNet Unit must be registered in it when
replacing the C200HW-DRM21-V1 with the CS1W-DRM21 or CJ1W-DRM21. If the DeviceNet Unit is not
registered, it will result in a routing table error, and the 7-segment display of the DeviceNet Unit will indicate “HC”.

234

Appendix B
DeviceNet Connections
DeviceNet has several different protocols for remote I/O communications between Master and Slave devices.
Connections are units used to monitor those protocols.
There are four kinds of DeviceNet remote I/O communications protocols (connections): Poll, bit–strobe, COS
(change of state), and cyclic. CS/CJ-series DeviceNet Units support all four types.
The connection used by the DeviceNet Unit is automatically selected if the Configurator is not used.
If the Configurator is used, the connection can be automatically selected by the DeviceNet Unit or the user can
specify the connections for each slave. Up to two connections can be set. COS and cyclic connections cannot
be specified at the same time. The characteristics of each connection are outlined in the following table.
Connection

Characteristics

Poll

Used for basic I/O.

Bit-strobe

Used for input of 8 bytes or less. Sends broadcasting requests from master and receives input
from slaves.

COS (Change of
State)

Communications occur at regular cycles (heartbeat timer) and the con- Note: COS and cyclic
nection is determined by the master or slave sending the data.
connections cannot be
Data can be sent only when required, which reduces the network com- used at the same time.
munications load.
This connection can be used to send data to the master or slave if the
master or slave data changes. For DeviceNet Units, the transmission
timing can be decided in the user program.
The following points apply for CS/CJ-series DeviceNet Units:
If the Master COS Send Switch is turned ON, remote I/O communications output data can be sent every time from the master using COS to
the slaves that support COS.
If the Slave COS Send Switch is turned ON, remote I/O communications
output data can be sent every time from the slave using COS to the
master (input data from the perspective of the master).
Even if the software switch is not turned ON, the COS communications
using regular cycles (heartbeat timer) can be performed simultaneously.
Note: This CS/CJ-series DeviceNet Unit is the only OMRON slave that
supports COS.

Cyclic

Communications timing is determined by regular cycles (heartbeat
timer).
Masters and slaves send output or input data in regular cycles.

Note 1. The C200HW-DRM21-V1 and CVM1-DRM21-V1 DeviceNet Master Units use bit-strobe connections
with slaves with 8 or less input points and poll connections with other slaves. The DeviceNet Unit automatically chooses the connection.
2. There can be only one master on each network if COS or cyclic connections are used.

235

Appendix B

DeviceNet Connections

Connections Using Allocations
Allocation method
Without Configurator

With Configurator

Contents

Fixed allocation (scan Only 1 connection, automatically selected by
list disabled or
the DeviceNet Unit. (Either a polling or bitenabled)
strobe connection is used.)
User-set allocations
using allocated DM
Area word settings

Only 1 connection, automatically selected by
the DeviceNet Unit based on the I/O area
set in the Master User Allocations Table.

User-set allocations
using Configurator

The user can select the connection to be
used for each node address with the Configurator e.g., poll could be used for data and
COS could be used for status. Automatic
selection or user selection can be specified.
Two connections can be used simultaneously for one slave (but COS and cyclic
cannot be used simultaneously.)

Setting Connection Type
The settings for remote I/O communications connections differ depending on the allocation method, as outlined
below.

Fixed Allocation or User-set Allocations Using Allocated DM Area Words
The Master CS/CJ-series DeviceNet Unit automatically selects either poll or bit-strobe, whichever makes the
communications cycle time shortest.

User-set allocations Using Configurator
The Master CS/CJ-series DeviceNet Unit can make an automatic selection, the same as above, or the user
can select up to two connections for a Slave. The setting method is outlined below.
1. Select the Master Node in the Network Configuration Window in the Configurator.
2. Select Device – Parameters – Edit – All Masters and select the corresponding Slave. Click the Detailed
Settings Button.
3. On the Connection Tab Page shown below, select a check box.
• Automatic selection
• User selection
Select up to two connections from poll, bit–strobe, COS and cyclic. COS and cyclic connections cannot be
used at the same time.
COS send switch OFF to ON
Time

I/O refresh
CPU Unit user program
COS send instruction
DeviceNet Unit
Communications cycle
time

Communications cycle
time

Slave
I/O using normal connection

236

COS output

Communications cycle
time

Appendix B

DeviceNet Connections

Note 1. Output data using poll connections and output data using COS or cyclic connections are transmitted
using the same frame. Therefore set the same output size (bytes) when combining poll and COS or
poll and cyclic.
2. The COS/cyclic heartbeat timer is the smallest transmission interval for COS or cyclic connections.
It can be set for each corresponding slave.
Refer to DeviceNet Configurator Operation Manual (W382) for details on Configurator operation.

Connection Path
Connection path are parameters that specify the type of I/O data in the slaves. Depending on the type of slave,
the internal I/O data type may be able to be selected. If it can, the connection path and I/O data type in the
slave specified for remote I/O communications.
The connection path settings will differ depending on the allocation method, as outlined below.

Fixed Allocation or User-set Allocations Using DM
Connection path settings cannot be made.

User-set Allocations Using Configurator
The Configurator can be used to set the type of I/O data in the slave, using the connection path. The user can
use this method to set the I/O data type in the master and the remote I/O communications slave.
The connection path is saved by the Configurator to the CS/CJ-series DeviceNet Unit scan list and when the
remote I/O communications are started, the connection path is set to the slave via the DeviceNet network.
Master

I/O data
Connection

Connection path
Slave

Data 1

Data 2

237

Appendix B

DeviceNet Connections

Master COS Send Switch
COS transmission is possible only for User-set allocations using the Configurator.
When required, remote I/O output data can be output from the master to a specified slave.
Output data can be sent at the communications cycle timing to the specified slave by other connections
selected automatically or by the user (only when using the Configurator).
In this case, the communications timing is not dependant on the communications cycle time but it is dependant
on the CPU Unit cycle time.
Note When there are a lot of masters or slaves using COS communications, or when the number of transmissions using COS is high, it has a large impact on the remote I/O communications performance for each
normal communications cycle time and responses may be delayed. Therefore, give ample consideration
to the system performance when using COS.
DeviceNet Units use the Master COS Send Switch in the allocated CIO Area words to execute COS transmissions from the master to slaves. The procedure is outlined below.
Step 1
Before executing COS transmission, the connection for the destination slave must be set to COS in the master
scan list, using the Configurator.
Step 2
If the bit allocated to each node address from n + 2 words to n + 5 words is turned from OFF to ON, the output
data is sent to that node address at a timing independent of the communications cycle time.
COS send switch OFF to ON
I/O refresh

Time

CPU Unit user program
COS send instruction
DeviceNet Unit

Communications
cycle time

Slave

I/O using normal connection

COS output

Multiple bits can be turned OFF to ON simultaneously and output data can be sent to multiple node addresses
simultaneously.

238

Appendix B

DeviceNet Connections

The following diagram shows the transmission timing. After the COS send instruction has been sent to the
DeviceNet (at the I/O refresh timing for the CPU Unit), the COS transmission is executed to each slave immediately after the refresh (remote I/O communications), which each slave is performed during the communications
cycle. Therefore, when there are a lot of destination slaves, the COS send timing may be delayed in order of
the node addresses.
Multiple COS send switches (node address #1, #2, #3) turned OFF to ON
I/O refresh

Time

CPU Unit user
program

COS send instruction
DeviceNet Unit

Node #1 Node #2 Node #3 Node #4 Node #1

Communications cycle time

COS
COS
COS
Node #2
Node #3
Node #4
#1
#2
#3

Communications cycle time

Slave # 1
Slave # 2
Slave # 3

: I/O using normal connection
: Output using COS (sent to fit in between
normal cycles)

239

Appendix C
FINS Commands and Responses for
DeviceNet Units
List of Command Codes
Command type

Command code

Reference page

RESET

0403

241

CONTROLLER DATA READ

0501

241

CONTROLLER STATUS READ

0601

242

ECHOBACK TEST

0801

243

ERROR LOG READ

2102

244

ERROR LOG CLEAR

2103

245

Refer to SYSMAC CS/CJ Series Communication Commands Reference Manual (W342) for details on end codes.

RESET (0403)
Resets (restarts) the DeviceNet Unit.

Command Block
Resets the DeviceNet Unit.

Command code

Response Block
There are no responses for this command

End Code
End code (hex)
1001

Contents
The command length exceeds maximum
command length.

Explanation
• Resets the DeviceNet Unit.
• A communications error has occurred at the Slave but the Slave will
restore after the DeviceNet Unit has started up.
• The remote device communicating the message may have timed out but
communications can be performed normally after the DeviceNet Unit has
started up.

READ CONTROLLER INFORMATION (0501)
Reads the following DeviceNet Unit information.
• Model
• Version
• Node address

241

Appendix C

FINS Commands and Responses for DeviceNet Units
• Baud rate

Command Block

Command code

Response Block
05

Command
code

End code

20 bytes

Model

Version

Node
Baud
address rate

End Codes
End code (hex)

Contents

0000

Normal end

1001

Command length exceeds maximum
command length.

Parameter Details
[Model, Version] (Response)
The DeviceNet Unit model and version are returned as outlined below in 20byte ASCII code. If the data is less than 20 bytes, the remaining bytes will be
filled by 20 Hex (space).
• Model:
CS1W-DRM21
Or:
CJ1W-DRM21
Version:
V1.00V1.02V1.01

@@@@@@@@@@ (@: space)

@@@@@@@@@@ (@: space)
@@@@@ (@: space)

• Node Address:
The following DeviceNet Unit node addresses are returned: 00 to 3F hex.
• Baud Rate:
0 hex: 125 kbps
1 hex: 250 kbps
2 hex: 500 kbps

READ CONTROLLER STATUS (0601)
Reads the internal status of the DeviceNet Unit.

Command Block

Command code

242

Appendix C

FINS Commands and Responses for DeviceNet Units
Response Block

Command End code Operation Unit
code
status
status 1

Unit
status 2

Master
function
status 1

Slave
function
status 1

Master
function
status 2

Slave
function
status 2

End Codes
End code (hex)

Contents

0000

Normal end

1001

Command length exceeds maximum command length.

2606

Service cannot be executed.

Parameter Details
[Operation status, Units status 1, Unit status 2, Master function status 1, Master function status 2, Slave function status 1, Slave function status 2]
(response)
• Operation Status
Fixed at 01 hex.
• Units status 1, Unit status 2, Master function status 1, Master function status 2, Slave function status 1, Slave function status 2
The same value as the status in the allocated CIO Area words is returned.

ECHOBACK TEST (0801)
Performs an echo back test (communications test between nodes) between
specified nodes.

Command Block
538 bytes
max.
Command
code

Test data

Response Block

538 bytes
max.
Command
code

End code

Test data

End Codes
End code (hex)

Contents

0000

Normal end

1001

Command length exceeds maximum command length.

1002

The command length is insufficient for the smallest command.
There is no test data.

Parameter Details
[Test Data] (Command, Response)

243

Appendix C

FINS Commands and Responses for DeviceNet Units

For commands, the data to be sent to the specified node is specified, with a
maximum of 538 bytes.
For responses, The test data that was sent by the command is returned.

Explanation
An error has occurred if the test data sent by the command and the tests data
returned by the response are different.

READ ERROR HISTORY (2102)
Reads the error history saved in the DeviceNet Unit.

Command Block

Command Beginning
code
record no.

No. of
records

Response Block

Command End code
code

Max. no.
of stored
records

No. of
stored
records

No. of
read
records

Error log
data (for
1 record)

End Codes
End code (hex)
0000

Contents
Normal end

1001

Command length exceeds maximum command length.

1002

The command length is insufficient for the smallest command.

1103

Outside address range error
The Read start record No. is larger than the number of records
currently stored.

110C

Parameter error
No. of read records= 0.

Parameter Details
[Read Start Record No.](Command)
Specifies the record number where the read is to start in 2-byte (4-digit) hexadecimal. The record number is specified from 0000 to 0003F hex (0 to 63 decimal), with the first word being 0000 hex.
[Read Record No.](Command, response)
For commands, specifies the number of records to be read. The specification
range is 0001 to 0040 hex (1 to 64 decimal).
For responses, the number of records actually read is returned.
[Max. No. of Records] (Response)
The maximum number of errors that can be recorded in DeviceNet Unit error
history. Fixed to 0040 hex (40 decimal) for DeviceNet Units.
[No. Stored] (Response)
The number of error history records stored at the point when the command
was executed. The range is 0000 to 0040 hex (0 to 64 decimal).
[Error History Data] (Response)

244

Appendix C

FINS Commands and Responses for DeviceNet Units

Returns the error history for the number specified by Read Record No., in
order from the Read Start Record No. The total number of Error History Data
bytes is 10 × Read Record No.
One record of error history data is structured in 10 bytes as shown in the following diagram.
1st byte

Error code

10th byte

Detailed
information

Minute Second Day

Time

Year Month

• Error Codes, Detailed Information
Shows the contents of the error stored in that record. Refer to 9-2 Error
Log Functions for details.
• Minutes, Seconds, Day, Time, Year, Month
Shows the date and time that the error stored in that record occurred.

Explanation
• Reads the error history data recorded in the DeviceNet Unit from the
specified point for the specified number of records.
• Up to 64 records are recorded in the DeviceNet Unit and the oldest data
will be the first to be replaced when the maximum is reached.

Important Points
• If there are fewer error history records than the Read Record No., the
records up to the last (latest) record stored at the point of command execution and then the processing/communications will end normally. The
actually number of records read will be returned as the Read Record No.
• If more than the current number of records is specified for Read Record
No., the end code 1103 hex will be returned.
• If the Read Record No. is 0000, the processing will end normally even if
there are no error records.
• If the Read Start Record No. is specified as 0000, the end code 110C hex
is returned.

ERROR HISTORY CLEAR (2103)
Command Block

Command
code

Response Block

Command
code

End code

245

Appendix C

FINS Commands and Responses for DeviceNet Units
End Codes
End code (hex)

Contents

0000

Normal end

1001

Command length exceeds maximum command length.

Important Point
The Error History Clear command clears the RAM and EEP-ROM error history tables.

246

Appendix D
Memory Card Backup Functions
The DeviceNet Unit stores the following setup data in the internal non-volatile memory (EEPROM).
• Master scan lists
• Slave scan lists
• Message monitoring timer lists
• Communications cycle time settings
• Master/Slave functions enabled/disabled settings
Note Backup is possible only when scan lists are enabled.
With the CS1 DeviceNet Unit, all this setup data can be backed up to and restored from a Memory Card
mounted to the CPU Unit (see note).
Note The data can be backed up to a Memory Card only. It cannot be backed up to a EM file.
If all setup data for a DeviceNet Unit that starts normally is saved on a Memory Card, that data can be read and
used when replacing DeviceNet Units, making the replacement process smooth.
Device parameter files (.dvf files) created using the Configurator can be saved from the computer to the Memory Card and can be restored to the DeviceNet Unit mounted to the CPU Unit. This means that setup data created using the Configurator (scan lists and other parameters) can be downloaded to DeviceNet Units simply by
taking the Memory Card to site.
DeviceNet Unit

CPU Unit

Unit Setup File Backup Switch
Unit Setup File Restore Switch
Configurator (computer)

All setup
data

Memory Card
Backup
Restore

Save file

Load file

247

Appendix D

Memory Card Backup Functions

Outline of Functions
1. Backing Up Unit Setup Files
Saves all internal Unit setup data to the Memory Card mounted to the CPU Unit.
Method: Turn ON the Setup File Backup Switch (word n+1, bit 15) to save the internal Unit setup data to the
Memory Card as a Unit Setup File.
DeviceNet Unit

CPU Unit

Unit Setup File Backup switch

Memory Card

data
Backup

2. Restoring Unit Setup Files
Restoring Unit Setup Files involves reading the data and setting it to a Unit. The data saved to the Memory
Card mounted to the CPU Unit is read to the Unit.
Method: Turn ON the Unit Setup File Restore Switch (word n+1, bit 14) to read the Unit setup data file on the
Memory Card and to enable these settings as the Unit settings.
DeviceNet Unit

CPU Unit

All setup
data

Unit Setup File Restore Switch

Memory Card
Restore

Note If there is an error in the setup data or if the file could not be read, the File Read/Write Error bit in Unit
Status 2 (word n + 11, bit 08) will turn ON.

248

Appendix D

Memory Card Backup Functions

3. Saving Files from Configurator to Memory Card
Device parameter files (.dvf files) for this DeviceNet Unit that have been created using the Configurator can be
saved on the Memory Card via the HMC-AP001 Memory Card Adaptor as file name DNnnBKUP.dvf (where nn
is the Unit number in 2-digit hexadecimal). This DeviceNet Unit can be mounted to the CPU Unit and, by turning ON the Unit Setup File Restore Switch (word n, bit 14), the setup data can be restored to the DeviceNet
Unit.
Note The file name when saving setup data to the Memory Card must be DNnnBKUP.dvf (where nn is the Unit
number in 2-digit hexadecimal). For example, for unit number 00, the file name must be DN00BKUP.dvf.
If the file is saved under another name, the data cannot be restored from the Memory Card to the
DeviceNet Unit.
DeviceNet Unit

CPU Unit
Unit Setup File Restore Switch
HMC-AP001 Memory Card Adaptor
Memory Card
Memory Card

All
setup
data

Configurator (computer)

Restore
Saving device
parameter file
Saved as file name DNnnBKUP.dvf, where nn
is the Unit number in 2-digit hexadecimal.)

249

Appendix E
Multi-vendor Applications
This appendix provides precautions and reference material needed when using DeviceNet (CompoBus/D)
Units as DeviceNet components in a multi-vendor environment.

Connecting another Company’s Slaves to an OMRON Master
If a Slave has an EDS file, it can be installed in OMRON’s Configurator to enable handling it just like an
OMRON Slave. (OMRON’s Configurator already has installed all of the Slave EDS files currently registered
with the ODVA.)
In particular, be sure to determine the number of words in the OMRON Master Unit that the Slave requires for
input and output.
For Connection Object Interface 2 (Polled I/O Connection), the number of I/O words allocated in the OMRON
Master can be found from the “Produced Connection Size” and “Consumed Connection Size” as shown below.
Up to 32 words can be allocated to inputs and another 32 words to outputs.

Produced Connection Size
This is the amount of memory (usually in bytes) allocated as input.

Consumed Connection Size
This is the amount of memory (usually in bytes) allocated as output.
If the connection size is an even number of bytes, the number of allocated words is: (bytes ÷ 2).
If the connection size is an odd number of bytes, the number of allocated words is: [(bytes +1) ÷ 2)].
If the connections size is zero (0), no words are allocated.
For Connection Object Interface 3 (Bit Strobed I/O Connection), the number of input words allocated in the
OMRON Master can be found from the “Produced Connection Size” as shown below.

Produced Connection Size
This is the amount of memory (usually in bytes) allocated as input.
If the connection size is an even number of bytes, the number of allocated words is: (bytes ÷ 2).
If the connection size is an odd number of bytes, the number of allocated words is: [(bytes +1) ÷ 2)].

Connecting an OMRON Slave to another Company’s Configurator
When another company’s configurator (a device that makes environment settings on DeviceNet Masters and
Slaves) is connected, it will be able to read settings from OMRON Masters and Slaves but not change them.
When another company’s configurator is being used, we recommend creating an OMRON Slave EDS file (a file
that contains each Slave’s parameters and operating information). Refer to the OMRON Slave device profile as
well as the Configurator’s manual for details on creating an EDS file.

251

Appendix E

Multi-vendor Applications

Master Unit Device Profile
General data

Compatible DeviceNet Specifications

Volume I - Release 2.0
Volume II - Release 2.0

Vendor name

OMRON Corporation

Vendor ID = 47

Device profile name

Communication Adapter

Profile number = 12

Manufacturer catalog number

Manual number (W267, W347)

Manufacturer revision

1.0

Physical conform- Network current consumption
ance data
Connector type

Communications
data

24 VDC, 30 mA max.
Open plug

Physical insulation

Yes

Supported indicators

Module, Network

MAC ID setting

Rotary switch

Default MAC ID

Baud rate setting

DIP switch

Supported baud rates

125 kbps, 250 kbps, and 500 kbps

Predefined Master/Slave connection set

Group 2 client
Group 2 only client
Group 2 server

Dynamic connection support (UCMM)

Yes

Explicit message fragmentation support

Yes

Object Mounting
Identity Object (01 Hex)
Object class

Attribute

Not supported

Service

Not supported

Attribute

1 Vendor

Item
Object instance

ID content

Service

Object instance

Attribute

Yes

4 Revision

Yes

2.1

5 Status (bits supported)

Yes

---

6 Serial number

Yes

Unique for each Unit

7 Product name

Yes

CS1W-DRM21 or CJ1WDRM21

8 State

---

DeviceNet Service

Parameter option

05 Reset

None

0E Get Attribute Single

None

252

Not supported
Not supported

Attribute

Not supported

Service

Value
47

3 Product code

Service

Vendor specification addition

Set (write)
No

2 Product type

Message Router Object (02 Hex)
Object class

Get (read)
Yes

Not supported
No

Appendix E

Multi-vendor Applications
DeviceNet Object (03 Hex)
Item
Object class

ID content
DeviceNet service

Parameter option

0EGet Attribute Single

ID content

Service

1 MAC ID

Value

Service

Attribute

Yes

Set (write)

1 Revision

Item
Object class

Get (read)

Attribute

Get (read)
Yes

Set (write)

Value

2 Baud rate

Yes

3 BOI

Yes

0
0

4 Bus–off counter

Yes

5 Allocation information

Yes

6 MAC ID switch changed No

7 Baud rate switch
changed

8 MAC ID switch value

9 Baud rate switch value

DeviceNet service

Parameter option

0E Get Attribute Single

4B Allocate Master/Slave Connection Set

4C Release Master/Slave Connection Set

Connection Object (05 Hex)
Object class

Attribute

Not supported

Service

Not supported

Max. number of instances

203

253

Appendix E

Multi-vendor Applications

Object instance 1

Section

Information

Max. No. of instances

Instance
type

Explicit Message

Production trigger

Cyclic

Transport
type

Server

Transport
class

Attribute

Service

254

ID content

Get
(read)

Set
(write)

Value

1 State

Yes

---

2 Instance type

Yes

3 Transport class trigger

Yes

83 hex

4 Produced connection ID

Yes

---

5 Consumed connection ID

Yes

---

6 Initial comm. characteristics

Yes

21 hex

7 Produced connection size

Yes

553

8 Consumed connection size

Yes

Format 16-16: 557
Format 8-8: 555
Format 16-8, 8-16: 556

9 Expected packed rate

Yes

---

12 Watchdog time-out action

Yes

1 or 3

13 Produced connection path length

Yes

14 Produced connection path

Yes

empty

15 Consumed connection path length

Yes

16 Consumed connection path

Yes

empty

17 Production inhibit time

Yes

---

DeviceNet service

Parameter option

05 Reset

0E Get Attribute Single

10 Set Attribute Single

Appendix E

Multi-vendor Applications

Object instance 2

Section

Information

Max. No. of instances

Instance
type

Polled I/O

Production trigger

Cyclic

Transport
type

Server

Transport
class

Attribute

Service

ID content

Get
(read)

Set
(write)

Value

1 State

Yes

---

2 Instance type

Yes

3 Transport class trigger

Yes

82 hex

4 Produced connection ID

Yes

---

5 Consumed connection ID

Yes

---

6 Initial comm. characteristics

Yes

7 Produced connection size

Yes

See note 1.

8 Consumed connection size

Yes

See note 2.

9 Expected packed rate

Yes

---

12 Watchdog time-out action

Yes

13 Produced connection path length

Yes

14 Produced connection path

Yes

20 94 24 01 hex

15 Consumed connection path length

Yes

16 Consumed connection path

Yes

20 94 24 01 hex

17 Production inhibit time

Yes

---

DeviceNet service

Parameter option

05 Reset

0E Get Attribute Single

10 Set Attribute Single

Note 1. Number of input bytes used by Slave.
2. Number of output bytes used by Slave.

255

Appendix E

Multi-vendor Applications

Object instance 3

Section

Information

Max. No. of instances

Instance
type

Bit Strobed I/O

Production trigger

Cyclic

Transport
type

Server

Transport
class

Attribute

ID content
1 State

Service

Yes

Set
(write)
No

Value
---

2 Instance type

Yes

3 Transport class trigger

Yes

82 hex

4 Produced connection ID

Yes

---

5 Consumed connection ID

Yes

---

6 Initial comm. characteristics

Yes

7 Produced connection size

Yes

See note 1.

8 Consumed connection size

Yes

9 Expected packed rate

Yes

---

12 Watchdog time-out action

Yes

13 Produced connection path length

Yes

14 Produced connection path

Yes

empty

15 Consumed connection path length

Yes

16 Consumed connection path

Yes

20 94 24 01 hex

17 Production inhibit time

Yes

---

DeviceNet service

Parameter option

05 Reset

0E Get Attribute Single

10 Set Attribute Single

Note 1. Number of input bytes used by Slave.

256

Get
(read)

Appendix E

Multi-vendor Applications

Object instance 4

Section

Information

Max. No. of instances

Instance
type

COS/cyclic I/O

Production trigger

Cyclic

Transport
type

Client

Transport
class

0 (no ACK)/2 (with ACK)

Attribute

ID content
1 State

Service

Get
(read)
Yes

Set
(write)
No

Value
---

2 Instance type

Yes

3 Transport class trigger

Yes

02 hex (with Cyclic
ACK)
12 hex (with COS
ACK)
00 hex (no Cyclic
ACK)
10 hex (no COS ACK)

4 Produced connection ID

Yes

---

5 Consumed connection ID

Yes

FFFF hex (no ACK)

6 Initial comm. characteristics

Yes

01 hex (with ACK)
0F hex (no ACK)

7 Produced connection size

Yes

See note 1.

8 Consumed connection size

Yes

---

9 Expected packed rate

Yes

---

12 Watchdog time-out action

Yes

13 Produced connection path length

Yes

14 Produced connection path

Yes

20 94 24 01 hex

15 Consumed connection path length

Yes

0 (no ACK)
4 (with ACK)

16 Consumed connection path

Yes

empty (no ACK)
20 2B 24 01 (with
ACK)

17 Production inhibit time

Yes

---

DeviceNet service

Parameter option

05 Reset

0E Get Attribute Single

10 Set Attribute Single

Note 1. Number of input bytes used by Slave.

257

Appendix E

Multi-vendor Applications

Object instance 5
and above

Section

Information

Max. No. of instances

Instance
type

Explicit Message/ I/O Message

199

Production trigger

Cyclic

Transport
type

Server

Transport
class

0/2/3

Attribute

ID content

Get
(read)

1 State

Service

Yes

Set
(write)
No

Value
---

2 Instance type

Yes

See note 1.

3 Transport class trigger

Yes

See note 2.

4 Produced connection ID

Yes

---

5 Consumed connection ID

Yes

---

6 Initial comm. characteristics

Yes

---

7 Produced connection size

Yes

---

8 Consumed connection size

Yes

---

9 Expected packed rate

Yes

---

12 Watchdog time-out action

Yes

---

13 Produced connection path length

Yes

---

14 Produced connection path

Yes

---

15 Consumed connection path length

Yes

---

16 Consumed connection path

Yes

---

17 Production inhibit time

Yes

---

DeviceNet service

Parameter option

05 Reset

0E Get Attribute Single

10 Set Attribute Single

1. The following table shows the instance type by communications type.
Communications type

Instance type

Explicit Message

I/O

2. The following table shows the transport class trigger by connection type.
Format

Transport class trigger

Poll client

22 hex

COS (M) client

12 hex (with ACK)/10 hex (no ACK)

COS (M) server

92 hex (with ACK)/90 hex (no ACK)

Cyclic (M) client

02 hex (with ACK)/00 hex (no ACK)

Cyclic (M) server

82 hex (with ACK)/80 hex (no ACK)

Bitstrobe client

22 hex

Explicit client

22 hex

Explicit server

83 hex

PC Object (2F Hex)
Object class

258

Attribute

Not supported

Service

Not supported

Appendix E

Multi-vendor Applications

DeviceNet service
Object
Service
instance 1
(CIO area)

Object
instance 3
(DM area)

Service

Object
instance 4
(WR area)

Service

Object
instance 5
(HR area)

Service

Object
instance 6
(AR area)

Service

Object
instance 7
(TIM/CNT
area)

Service

Service
Object
instance 820 (EM0 to
EMC area)

Parameter option

1CBlock String Read

Logical Area Address Length

1DBlock StringN Read

Logical Area Address Length

1EBlock String Write

Logical Area Address

1FBlock StringN Write

Logical Area Address

1CBlock String Read

Logical Area Address Length

1DBlock StringN Read

Logical Area Address Length

1EBlock String Write

Logical Area Address

1FBlock StringN Write

Logical Area Address

1CBlock String Read

Logical Area Address Length

1DBlock StringN Read

Logical Area Address Length

1EBlock String Write

Logical Area Address

1FBlock StringN Write

Logical Area Address

1CBlock String Read

Logical Area Address Length

1DBlock StringN Read

Logical Area Address Length

1EBlock String Write

Logical Area Address

1FBlock StringN Write

Logical Area Address

1CBlock String Read

Logical Area Address Length

1DBlock StringN Read

Logical Area Address Length

1EBlock String Write

Logical Area Address

1FBlock StringN Write

Logical Area Address

1CBlock String Read

Logical Area Address Length

1DBlock StringN Read

Logical Area Address Length

1EBlock String Write

Logical Area Address

1FBlock StringN Write

Logical Area Address

1CBlock String Read

Logical Area Address Length

1DBlock StringN Read

Logical Area Address Length

1EBlock String Write

Logical Area Address

1FBlock StringN Write

Logical Area Address

259

Appendix E

Multi-vendor Applications
Note The refresh area types are shown in the following table.
PC area
CIO

260

Refresh area type
1

Refresh address
CIO 0000 to CIO 6143

D00000 to D32767

W000 to W511

H 000 to H511

EM (bank 0)

E0_00000 to E0_32767

EM (bank 1)

E1_00000 to E1_32767

EM (bank 2)

E2_00000 to E2_32767

EM (bank 3)

E3_00000 to E3_32767

EM (bank 4)

E4_00000 to E4_32767

EM (bank 5)

E5_00000 to E5_32767

EM (bank 6)

E6_00000 to E6_32767

EM (bank 7)

E7_00000 to E7_32767

EM (bank 8)

E8_00000 to E8_32767

EM (bank 9)

E9_00000 to E9_32767

EM (bank 10)

EA_00000 to EA_32767

EM (bank 11)

EB_00000 to EB_32767

EM (bank 12)

EC_00000 to EC_32767

Appendix F
DeviceNet Explicit Message Send Command
for Other Manufacturer Nodes
Command

Command code

Explicit message send

2801

Explicit Message Send (2801)
Sends a DeviceNet explicit message to a specified object and receives a
response.

Command Block

534 bytes max.
Class ID
Service code

Command
code

Instance ID

Service data

Destination node address

Response Block
• When a normal response has been returned for the executed explicit
message:

534 bytes max.
Command
code

End code

No. of bytes
received

Service data
Service code
Source node address (local node)

• When an error response has been returned for the executed explicit message:

Command
code

End code

No. of bytes
received

Error code
Service code 94 (hex)
Source node address (local node)

• When the explicit message execution failed or timed out:

Command
code

End
code

261

DeviceNet Explicit Message Send Command for Other Manufacturer Nodes

Appendix F

Parameter Details
[Send Destination Node Address] (Command)
Specifies the node address of the explicit message destination.
The local node DeviceNet Unit is specified for CMND and IOWR instruction
control data for Explicit Message Send commands and the actual destination
node is specified here.
[Service Code] (Command, response)
For commands, the service code defined by the DeviceNet is specified.
For normal responses, the value for when bit 15 of the service code specified
in the command turns ON is returned. For error responses, 94 hex, which indicates an error, is returned.
[Class ID] (Command)
Specifies the class ID for the explicit message destination.
[Instance ID] (Command)
Specifies the instance ID for the explicit message destination.
[Service Data] (Command, response)
For commands, specifies the data defined by the service code.
For responses, returns the reception data defined by the service code.
[No. of Bytes Received] (Response)
Returns the number of bytes received after Source (local node) Node
Address.
[Source (local node) Node Address] (Response)
Returns the local node DeviceNet node address that was the source of the
explicit message.
[Error Code] (Response)
Returns the error code defined by the DeviceNet.

Explanation
• The Explicit Message Send command sends a DeviceNet-defined explicit
message to an OMRON Special I/O Slave Unit or a Slave manufactured
by another company and receives a response.
• Unlike other FINS commands, the Explicit Message Send command
specifies the local node DeviceNet Unit as the CMND and IOWR instruction control code destination. The actual destination node is specified
using the Destination Node Address in the Explicit Message Send command.
Always specify the local node DeviceNet Unit in the CMND or IOWR
instruction control code. If another node Master unit is specified an error
will occur.
• If the DeviceNet Master Unit receives an explicit message, it will automatically return a response.
Note 1. Refer to DeviceNet Specifications for explicit message parameter details.
2. For information on explicit messages for OMRON slave, refer to DeviceNet (CompoBus/D) Slave
Manual (W347).
3. Contact the Open DeviceNet Vendor Association, Inc. (ODVA) at 8222 Wiles Road, Suite 287, Coral
Springs, FL 33067 USA (phone: 954-340-5412, fax: 954-340-5413, e-mail: billmoss@ix.netcom.com,
Home page: http://www.odva.org/) to obtain copies of the specification.

262

Index
A
adaptors
remote, 4, 10
allocations
See also I/O allocations
applicable Units, 6
applications
precautions, xiv

C
C200HW-DRM21-V1
changing ladder programs, 79
comparison, 29
cables
I/O Unit Connecting Cable, 14
CIO Area
See also I/O allocations
cleaning, 225
commands
delivering commands through a network, 150
explicit message commands, 168
FINS commands lists, 143, 241
communications, 22, 190, 191
connection types, 127, 130, 235
connectors, 51
cycle time, 81, 190, 232
See also cycle time
errors, 224
flags, 152
hardware preparation, 36
high-speed, 20
instructions, 8, 151
completion codes, 153
message communications, 3, 8, 15, 26, 41, 133, 196
data area sizes, 153
data send/receive instructions, 148
errors, 139, 140
explicit messages, 137
commands
BYTE DATA READ, 174
BYTE DATA WRITE, 177
CPU INFORMATION READ , 168
CPU UNIT STATUS READ, 172
CPU UNIT WRITE , 169
WORD DATA READ, 176
WORD DATA WRITE, 178
list of PLC object services, 166
receiving, 165
send command for other manufacturer nodes
EXPLICIT MESSAGE SEND (2801), 261
sending, 158, 159
sending using CMND(490), 161
FINS messages, 135, 141
command lists, 143
commands
ECHO BACK TEST (0801), 243
ERROR HISTORY CLEAR (2103), 245
READ CONTROLLER INFORMATION

(0501), 241
READ CONTROLLER STATUS (0601),
242
READ ERROR HISTORY (2102), 244
RESET (0403), 241
connecting networks, 157
sending/receiving, 142, 150
Units supporting, 143
maximum message response time, 197
monitoring timer, 140
overview, 134
programming examples, 154
specifications, 138
structure, 135
time, 196
timing for reading responses, 153
using, 145
procedures prior to starting, 38
remote I/O, 3, 15, 23
errors, 118, 222
example ladder programming, 116
restarting, 116
See also Master Units
See also Slave Units
specifications, 123
starting, 116
stopping, 116
scan lists, 99
software switches, 9
status, 9
time/Slave, 20, 26, 191
timing, 189
Configurator
See also DeviceNet Configurator
connections, 20, 235
connection path, 237
supported, 22, 26
using allocations, 236
CPU Units
errors, 213
indicators, 222
I/O memory read/write, 167
status read/write, 166
CX-Programmer, 18
cycle time, 190
communications, 20, 190
reference table, 87
setup table, 81
specifications, 26, 232

D
DeviceNet Configurator, 15, 17, 27
connecting an OMRON slave to another company’s configurator, 251
connections, 236
functions, 33, 35
making slave allocations, 94, 113, 130
models, 33
outline, 33
saving files to Memory Card, 188, 249

263

Index
specifications, 34
dimensions, 55
DM Area
See also I/O allocations
dot indicators
See also seven-segment display

E
EC Directives, xvi
EEPROM
data, 26, 186, 247
errors, 201
codes, 219
display, 48
communications, 224
error flags, 71, 74, 76, 79
error log functions, 218
error log table, 218
master, 202
memory access, 210
message communications, 139, 140
network, 208
remote I/O communications, 118
scan lists, 224
slave, 217
software switch, 207
Unit, 218
explicit message communications
See also communications

F
features, 15
multi-vendor network, 15
FINS communications
command codes, 241
completion codes, 153
connecting networks, 157
See also communications
fixed allocations
See also I/O allocations
flags
See also communications
functions, 6, 27, 46
DeviceNet Configurator, 4, 15
master, 3, 6, 195
Memory Card backup, 186, 247
slave, 4, 7, 16, 196

I
I/O allocations, 92
allocation size setup table, 84
fixed, 38, 39, 101, 125
allocated words, 101, 125
changing system components, 105
CIO Area, 93
connections, 236
example, 105

264

procedure, 102, 125
using remote I/O master, 97
using remote I/O slave, 123
methods, 122
user-set, 16, 82, 85, 107, 126
connection types, 127, 130
connections using, 236
master user-set allocations reference table, 87
methods, 93, 107, 126
procedure, 38, 40, 127
setting through allocated DM area words, 108, 127
setting through Configurator, 113, 130
slave user-set allocations reference table, 88
using remote I/O master, 97, 98
using remote I/O slave, 124
word allocations, 22
CIO Area, 59, 60
C200 master replacement master status 1 (word
n+24), 79
disconnect/connect switches (words n+6 to n+9),
69
master COS send switches (words n+2 to n+5),
69, 238
master status 1 (word n+12), 74
master status 2 (word n+13), 75
normal slave table (words n+20 to n+23), 79
registered slave table (words n+16 to n+19), 78
slave status 1 (word n+14), 76
slave status 2 (word n+15), 78
software switches 1 (word n), 60
software switches 2 (word n+1), 65
unit status 1 (word n+10), 71
unit status 2 (word n+11), 72
DM Area, 59, 81
allocation size setup table, 84
communications cycle time reference table, 87
communications cycle time setup table, 81
master user allocations setup table, 82
master user-set allocations reference table, 87
slave detailed status, 89
slave user allocations setup table, 85
slave user-set allocations reference table, 88
overview, 58
I/O Link Units, 4
C200H I/O Link Unit, 5, 12
CQM 1 I/O Link Unit, 11
errors, 223
I/O memory
read/write for CPU Units, 167
I/O response times
maximum, 192
minimum, 194
CS1-series and C200HX/HG/HE/HS PCs, 194
I/O Terminals, 4
environment-resistant, 4, 12
water-resistant, 12
I/O Units
connecting cable, 14
See also Master Units
See also Slave Units
indicators

Index
display section, 27
Master Unit, 200
meaning, 47
message communications errors, 139
seven-segment display, 48
status
MS and NS, 47
troubleshooting, 200, 222
inspection, 225
installation, 51
instructions
CMND(490), 150, 151
RECV(098), 149, 151
SEND(090), 148, 151

L
ladder programs
replacing, 233

M
maintenance, 225
cleaning, 225
inspection, 225
Master Units, 6, 9
connecting another company’s slave to an OMRON master, 251
device profile, 252
errors, 202
I/O allocations, 82
See also I/O allocations
indicators, 200
multiple, 19, 194
node address display, 48
number of, 96
precautions, 96
remote I/O
communications, 92
procedures, 97
specifications, 24, 95
status, 200
status areas, 230
system startup time, 195
user-set allocations reference table, 87
using master function, 38
memory access
errors, 210
Memory Card, 19, 27, 186, 247
message communications
See also communications
message monitoring timer, 140
message response time, 197
mounting, 52
objects, 252
MULTIPLE I/O TERMINAL Units, 5, 13
multi-vendor environment, 251
multi-vendor network
See also features

N
networks
connecting for FINS communications, 157
errors, 208
installation procedure, 36
inter-network connections, 18
multiple masters, 194
multiple PCs on a single network, 19

O
objects, 252
Connection Object, 253
DeviceNet Object, 253
Identity Object, 252
Message Router Object, 252
PC Object, 258
See also PLC object services
operation
basic operation procedures, 36
operating environment
precautions, xiii
operating status
Master Unit, 200
overview, 2

P
PLC object services, 166
precautions, xi
applications, xiv
general, xii
handling, 53
Master Units
number of, 96
operating environment, xiii
safety, xii
system configuration, 51
previous models
comparison, 29
replacing ladder programs, 233
programming
examples, 154
See also instructions
See also ladder programs

R
refresh time, 192
remote I/O
communications characteristics, 190
See also communications
replacement, 226
replacing ladder programs, 233
See also setup
routing tables, 146
local network tables, 146
relay network tables, 147
RS-232C Units, 5, 12

265

Index

S
safety precautions, xii
scan lists, 99
errors, 224
setup
saving setup files, 19, 186, 247
seven-segment display
meaning, 48
Slave Units, 7, 9, 20
communications time, 191
connecting an OMRON slave to another company’s configurator, 251
connecting another company’s slave to an OMRON master, 251
environment-resistant, 12
errors, 217
faulty node address display, 48
general-purpose, 10
I/O allocations, 85
See also I/O allocations
monitoring, 18
multiple, 19
programmable, 12
programming, 18
remote I/O
communications, 122
procedures, 123
specifications, 25, 123
See also adaptors
See also I/O Link Units
See also I/O Terminals
See also MULTIPLE I/O TERMINAL Units
See also RS-232C Units
See also terminals
special, 12
status, 89
system startup time, 196
user-set allocations reference table, 88
using slave function, 39
water-resistant, 12
specifications
default settings, 26
general, 21
network length, 20
other functions, 27
remote I/O, 24, 25, 95
startup procedures
communications, 38
startup times, 195
status
areas
comparison with previous models, 230
indicators, 47
Master Unit, 200
read/write for CPU Units, 166
switches, 27, 46
procedures prior to starting communications, 38
settings, 49
errors, 224

266

software switches
comparison with previous models, 229
See also I/O allocations
setting errors, 207
system
configuration, 3
startup times, 195

T
tables
error log, 218
local network, 146
normal slave, 233
registered slave, 232
relay network, 147
routing, 146
terminals
analog input, 4, 11
analog output, 4, 11
B7AC Interface Terminal, 12
remote I/O, 10
See also I/O Terminals
sensor, 4, 11
temperature input, 5, 11
timer
message monitoring, 140
timing
communications, 189
reading responses, 153
troubleshooting, 199, 222

U
Units
applicable, 7
usage, 42
user-set allocations
See also I/O allocations

V
VME Master Boards, 3

W
waterproof, 12
word allocations
See also I/O allocations

Revision History
A manual revision code appears as a suffix to the catalog number on the front cover of the manual.

Cat. No. W380-E1-2

Revision code
The following table outlines the changes made to the manual during each revision. Page numbers refer to the
previous version.
Revision code

Date

October 2000

July 2001

Revised content
Original production
Major revisions to add the CJ-series DeviceNet Unit. “CS1” was changed to “CS” or “CS/CJ” as appropriate and the following changes were made. Other changes are as follows:
Page ix: Manual contents updated and manuals added to table.
Page xiv: Precaution added on providing double safety mechanisms.
Page xv: EMC standards updated.
Page xvi: Impedances, manufacturer, and dimensions changed.
Page 2: Changed to “DeviceNet Unit” to clarify meaning.
Page 3: Corrected callout at upper right of page.
Pages 8 and 25: Number of node for FINS communications changed.
Pages 8, 16, 17, 18, 19: Notes added.
Pages 10, 11, 15: Products added.
Page 15: OS updated in table.
Page 16: Graphics changed.
Page 17: Bottom graphic and description changed.
Page 31: Routing table item added to table.
Page 33: Maximum words per slave item added to table.
Page 34: Corrected CIO 3770 number.
Page 36, 37: Added PCI Board info to graphic and tables.
Page 39: Note added.
Page 41: Routing table section added.
Pages 42, 43, 44: Slight change in procedure.
Page 48: Graphic added.
Pages 48, 49, 50: Information added from previous sections 8-2, 8-3, and graphics changed.
Page 51: Graphics changed.
Page 52: Note added, graphic added.
Page 55: CJ-series explanation added.
Page 56: Graphic added.
Page 60: Information added to Software Switches 1 description.
Pages 62, 63, 64, 65: Table items added.
Page 95: Address numbers changed in graphic.
Page 101: Note in item 7 corrected (Right changed to Left).
Page 101: Same note in item 6 corrected (Right changed to Left).
Page 102: Note 2 added concerning Configurator Ver. 2.10.
Page 105: Change made to Step 2 of 4-3-2, and Step 3 added.
Page 107: Table changed.
Page 109: Allocation tables changed.
Page 114: Changes made to Changing System Components section.
Page 118: Note added concerning Configurator Ver. 2.10.
Page 119: Changes made to 4-5-1.
Page 119: Changes made to 4-5-2.
Page 120: Note added.
Page 127: Note 2 added concerning Configurator Ver. 2.10.
Page 133: Note 2 added concerning Configurator Ver. 2.10.
Page 140: Explanation of node address 0 added to table.
Page 142: Revision made to note in section 6-1-6.
Pages 146, 147, 148, 149: Sections 6-3 to 6-3-2 newly added.
Pages 157, 158: Section 6-4 moved from previous location in section 6-6.
Page 160: Note content changed.
Page 174: Reference to manual changed in Note.
Pages 181, 182, 183, 184, 185: Sections 7-1 to 7-1-4 newly added.
Pages 185, 186, 187: Sections 7-2 to 7-2-2 moved from Appendix.
Page 193: PC cycle time delay calculation in two Notes changed from 0.25 ms + 1.5 ms to 0.7 ms.
Page 194: Table item changed from (TPC-TRF) to (TPC+TRF).
Page 197: PC cycle time delay calculation changed from 0.25 ms + 1.5 ms to 0.7 ms.
Page 200: Information from previous sections 8-2, 8-3 moved to pages 48, 49, 50.
Page 222: Reference to Slaves Operation Manual changed.
Page 225: Reference to Slaves Operation Manual changed.
Page 225: DNnnBKUP.DAT changed to DNnnBKUP.dvf in Note 3.
Page 232: Note added.

267

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