Delta Electronics Dtc1000 Series Users Manual 5011635004 DCE4

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Temperature Controller

Instruction Sheet

Thank you very much for purchasing DELTA DTC1000/2000 Series Temperature Controller. Please read this

instruction sheet before using your DTC1000/2000 series to ensure proper operation, and please keep this instruction

sheet handy for quick reference.

 Caution

DANGER! Caution! Electric Shock!

DTC1000/2000 series is an OPEN-TYPE device and therefore should be installed in an enclosure free of airborne

dust, humidity, electric shock and vibration. The enclosure should prevent non-maintenance staff from operating the

device (e.g. key or specific tools are required to open the enclosure) in case danger and damage on the device may

occur.

WARNING!

1. Prevent dust or metallic debris from falling into the controller that will cause malfunction. DO NOT modify or

disassemble the controller. DO NO use extra terminals.

2. Do not install and/or use the controller in places subject to:

 dust or corrosive gases and liquid  high humidity and high radiation  vibration and shock

3. Switch off the power when wiring or changing input sensors.

4. Be sure to use compensating wires that match the thermocouple types when extending or connecting the

thermocouple wires.

5. Shorten the wire when wiring a platinum resistance thermometer (RTD) to the controller, and separate power cable

from load wires to prevent interference and conductive influence.

6. Make sure the power cable and signals device are installed correctly before switching on the power of

DTC1000/2000; otherwise serious damage may occur.

7. DO NOT touch the terminals or repair the controller when the power is on to prevent electric shock.

8. Wait at least one minute after the power is off to allow the capacitor to discharge. DO NOT touch any inter

nal circuit

within this period.

9. DO NOT touch the internal terminals no matter the power is on or off.

10. DO NOT place other heating source (e.g. power supply) in parallel with DTC1000/2000 during the installation.

Please keep proper space in between.

 Model Name Explanation

DTC

1234

5

Series name DTC: Delta C series temperature controller

1 Controller position

1: First controller

2: Controller connected in parallel

2 Auxiliary output

groups

0: standard, 2 outputs, no auxiliary output

1: 1 auxiliary output. Not available now.

2: 2 auxiliary outputs. Not available now.

3 4 Optional

00: Standard

01: CT input. Not available now.

02: EVENT input. Not available now.

5 Main output type

R: Relay output SPST, 250VAC, 3A

V: Voltage pulse output 12V +10% ~ -20%

C: Current output 4 ~ 20mA

L: Linear voltage output 0 ~ 10V

Enclosed functions: DC24V input, 2 outputs, relay output for output 2, RS-485 communication.

 Function & Specification

Power supply DC24V. Isolated switching power

Voltage range Rated voltage: 90% ~ 110%

Power consumption Rated 24 VDC, Max. 24 W combined, 3W + 3W x number of DTC2000 controllers (Max. 7)

Thermocouple: K, J, T, E, N, R, S, B, L, U, TXK

Platinum RTD: Pt100, JPt100

Input sensors

Linear DC input: 0 ~ 5V, 0 ~ 10V, 0 ~ 20mA, 4 ~ 20mA, 0 ~ 50mV

Sampling rate Analog input: 0.15 sec. Thermocouple or platinum RTD: 0.4 sec.

Control method PID , programmable PID, Manual, ON/OFF

Relay: SPST, Max. load 250VAC, 3A resistive load

Voltage pulse: 12VDC, Max. output current: 40mA

Current: DC 4 ~ 20mA (Load resistance: < 500Ω)

Output types

Analog voltage: 0 ~ 10V (Load resistance: > 1,000Ω)

Output function Control output, alarm output, proportional output

Proportional output is available only when output 1 is linear voltage/current output.

Alarm 12 alarm modes

Communication RS-485 digital communication, 2,400bps ~ 38,400bps

Communication protocol

Modbus protocol, ASCII/RTU format

Internal connection Internal terminals available to transmit 24V power supply and communication signals

Vibration resistance 10 ~ 55Hz, 10m/s2 for 10mins, each in X, Y and Z direction

Shock resistance Max. 300m/s2, 3 times in each 3 axes, 6 directions

Ambient temperature 0 ~ 50°C

Storage temperature -20 ~ +65°C

Altitude < 2,000m

Ambient humidity 35% ~ 85% RH (non-condensing)

Pollution degree 2

 Product Profile & Outline

DTC1000R/V/C/L

1 RUN/STOP switch

2 Wiring and Model name

3 DIN rail clip

4 I/O terminals

5 LED indicators

6 Mounting hole

7 Specification label

8 Extension port

9 Extension clip

10

DIN rail

11

RS-485 communication port

12

Extension clip

13

DC power input

9

0

.

0

3

.

0

60.03.4

25.2

4.0

3

.

0

1

2

3

4

5

6

7

8

9

10

3

11

12

13

DTC2000R/V/C/L

1 Wiring and Model name

2 DIN rail clip

3 I/O terminals

4 LED indicators

5 Mounting hole

6 Specification label

7 Extension port

8 Extension clip

9 DIN rail

9

0

.

0

3

.

0

60.03.4

25.2

4.0

3

.

0

1

2

3

4

5

6

7

8

9

2

10

10

Extension port

 Input

DTC1000/2000 series supports the following input sensors:

Input Sensor Register Value Available Range

0 ~ 50mV linear voltage input 17 0 ~ 50mV

4 ~ 20mA linear current input 16 4 ~ 20mA

0 ~ 20mA linear current input 15 0 ~ 20mA

0 ~ 10V linear voltage input 14 0 ~ 10V

0 ~ 5V linear voltage input 13 0 ~ 5V

Platinum RTD (Pt100) 12 -200 ~ 600°C (-328 ~ 1,112°F)

Platinum RTD (JPt100) 11 -20 ~ 400°C (-4 ~ 752°F)

Thermocouple TXK type 10 -200 ~ 800°C (-328 ~ 1,472°F)

Thermocouple U type 9 -200 ~ 500°C (-328 ~ 932°F)

Thermocouple L type 8 -200 ~ 850oC (-328 ~ 1562°F)

Thermocouple B type 7 100 ~ 1,800°C (212 ~ 3,272°F)

Thermocouple S type 6 0 ~ 1,700°C (32 ~ 3,092°F)

Thermocouple R type 5 0 ~ 1,700°C (32 ~ 3,092°F)

Thermocouple N type 4 -200 ~ 1,300°C (-328 ~ 2,372°F)

Thermocouple E type 3 0 ~ 600°C (32 ~1,112°F)

Thermocouple T type 2 -200 ~ 400°C (-328 ~ 752°F)

Thermocouple J type 1 -100 ~ 1,200°C (-148 ~ 2,192°F)

Thermocouple K type 0 -200 ~ 1,300°C (-328 ~ 2,372°F)

Note 1: The current input is built-in with 249Ω precision resistor. See “How To Set up Current Input” section.

Note 2: Default setting: Pt100 input.

The range of linear input and feedback value is adjustable. Range of input feedback: -999 ~ 9,999. Take 0 ~ 20mA input

as example, -999 refers to 0mA input, and 9,999 refers to 20mA input. If we change the range to 0 ~ 2,000, 0 will refer to

0mA input, and 2,000 will refer to 20mA input. 1 display scale = 0.01mA.

 Output

There are several output types available from DTC1000/2000 series: Control Output (heating/cooling), Alarm Output

and Proportional Output.

y Control Output

DTC1000/2000 series offers 2 outputs for heating or cooling control. If you require dual loop output, the 2 outputs

should be set to different actions (heating or cooling). If you require the 2 outputs are set to the same control action, only

the control cycle of output 1 will be valid, and the 2 outputs will act at the same time.

The control methods include: PID control, ON/OFF control, Manual control and programmable PID control.

y Single Output Control

Heating hysteresis

ON

OFF PV

Figure1: ON/OFF Control

Cooling hysteresis

Heating Cooling

Set Point Set Point

PV

100%

0

Heating

Output

PV

100%

0

Output

Set Point

Cooling

Set Point

Figure 2: PID Control, Cooling) Control

Figure 3: PID Control, Heating Control

y Dual Output Control

OFF PV

Set Point

ON

Heating

Deadband

Heating hysteresis

Figure 4: ON/OFF Control

Cooling hysteresis

Cooling

Deadband: Dead

Bandwidth: Negative

PV

0

PV

0

Deadband: Dead

Bandwidth: Positive

Output

Heating Cooling

Set Point

Output

Heating Cooling

Set Point

Figure 5: PID control

Figure 6: PID Control

y Programmable PID Control & Parameters Setting

The programmable PID control includes 8 patterns (Pattern 0 ~ 7). Each pattern contains 8 steps (Step 0 ~ 7) and

parameters: “link pattern”, “cycle” and “the number of steps”.

Start Pattern: The user can set up which pattern is the start pattern for the programmable control.

Steps: Includes the settings of the two parameters, set point X and execution time T, indicating that the set point (SV)

has to rise to temperature X after the period of execution time T. If the result of the set point X is the same as that of

the previous setting, the process is called “Soak”; otherwise, it is called “Ramp”. Therefore, the programmable control

is also known as Ramp/Soak control. The default setting of the first step is Soak control. The temperature will first rise

to the set point X and remain at X. The total execution time is T.

Link Pattern: The pattern to be executed following the current pattern. If the setting is not 0 ~ 7, the set point will

remain at the last pattern.

Cycle: The additional number of cycles for a pattern. For example, if the parameter is set to 2, it refers to the pattern

has to execute additional twice, totaling the execution to 3 times including the original one.

The Number of Steps: The number of steps in each pattern (range: 0 ~ 7). For example, if the parameter is set to 2,

it refers to the pattern will execute Step 0 ~ Step 2, and other steps will not be executed.

The Execution: Available settings include “run”, “program hold”, “program stop” or “stop”.

1. When this parameter is set to “run”, the program will start its execution from step 0 of the start pattern.

2. When this parameter is set to “program hold”, the program will stop and the temperature will stop at the SV before

the program stops. If the user sets to “run” again, the program will resume the step before the program stops and

execute by the remaining time.

3. When this parameter is set to “program stop”, the program will stop and the temperature will stop at the SV before

the program stops. If the user sets to “run” again, the program will execute again from Step 0 of the start pattern.

4. When this parameter is set to “stop”, the program will stop, and the control output will be disabled.

Proportional Output:

If Output 1 of this DTC1000/2000 series is linear voltage or current, the user can set it to “Proportional Output”.

Proportional output refers to the output varies with the input. For example, if the input range is set to 0 ~ 1,000, and

when the input value is 0, the output will be 0mA or 0V. When the input value is 1,000, the output will be 20mA or 10V.

Figure 7: Proportional Output

Output

PV Low

PV High

Output

10V or 20mA

0V or 4mA

PV Low PV High

Negative

output slope

PV

PV

Positive output slope

10V or 20mA

0V or 4mA

y Alarm Output

DTC1000/2000 series offers 12 alarm modes. When the PV exceeds or falls below SV, the alarm output will be enabled.

See the table below for the 12 modes.

Mode

Alarm Type Alarm Output Operation

0 No alarm OFF

1

Alarm output will be enabled when the temperature reaches upper and lower

limits.

y Alarm will be enabled when the PV exceeds SV + AL-H or falls below SV –

AL-L.

ON

OFF

AL-L SV AL-H

Mode

Alarm Type Alarm Output Operation

2 Alarm output will be enabled when the temperature reaches the upper limit.

y Alarm will be enabled when the PV exceeds SV + AL-H.

ON

OFF

SV AL-H

3 Alarm output will be enabled when the temperature reaches the lower limit.

y Alarm will be enabled when the PV falls below SV – AL-L.

ON

OFF

AL-L

SV

4 y Alarm will be enabled when the PV is between SV + AL-L and SV – AL-L.

ON

OFF

AL-L SV AL-H

5

Alarm output will be enabled when the temperature reaches the absolute

value of the upper and lower limits.

y Alarm will be enabled when the PV exceeds AL-H or falls below AL-L.

ON

OFF

AL-L

AL-H

6

Alarm output will be enabled when the temperature reaches the absolute

value of the upper limit.

y Alarm will be enabled when the PV exceeds AL-H.

ON

OFF

AL-H

7

Alarm output will be enabled when the temperature reaches the absolute

value of the lower limit.

y Alarm will be enabled when the PV falls below AL-L.

ON

OFF

AL-L

8

Standby upper/lower limit alarm

y Alarm will be enabled when the PV reaches SV and exceeds SV + AL-H or

falls below SV – AL-L.

ON

OFF

AL-L

AL-H

SV

9 Upper limit standby alarm

y Alarm will be enabled when the PV reaches SV and exceeds SV + AL-H.

ON

OFF

SV AL-H

10 Lower limit standby alarm

y Alarm will be enabled when the PV reaches SV and falls below SV – AL-L

ON

OFF

AL-L SV

11

Upper limit hysteresis alarm

y Alarm will be enabled when the PV exceeds SV + AL-H and disabled when

the PV falls below SV + AL-L.

ON

OFF

AL-H

AL-L

12

Lower limit hysteresis alarm

y Alarm will be enabled when the PV falls below SV – AL-H and disabled

when the PV exceeds SV – AL-L.

ON

OFF

AL-H

AL-L

Note: AL-H and AL-L include AL1H, AL2H, AL1L and AL2L. When Output 1 is set to Alarm Output, use AL1H (1024H) and AL1L

(1025H). When Output 2 is set to Alarm Output, use AL2H (1026H) and AL2L (1027H).

 LED Display

1. When power is normal, POWER LED will be on.

2. After DTC1000/2000 is switched on, all LED will be on. The communication protocol will be displayed in 1 second,

followed by the communication address in the next second.

3. RUN LED is on when the control is executing.

4. ERROR LED is on when errors occur in input, memory or communication.

5. When an output is executing, its corresponding output LED will be on.

6. AT LED flashes when PID parameters are being auto-tuned.

7. RX LED flashes when DTC1000/2000 receives communication signals. TX LED flashes when DTC1000/2000

sends out communication signals.

Communication protocol displayed on LED after the power of DTC1000/2000 is switched on:

AT TX RX O1 O2 Err Run

000: 2,400bps 001: 4,800bps 010: 9,600bps

011: 19,200bps 100: 38,400bps

Parity 00: None 01: Even

10: Odd

0: ASCII

1: RTU

0:2 Stop bits

1:1 Stop bit

Communication address display: AT (bit 6) and Run (bit 0) are combined to binary code.

 Password Function

The default setting of the password is disabled. To enable the password function, enter the 4-character password in the

specific communication address. The password is protected by 3 levels.

1. Level 1: Only LED status, SV and PV can be read. No settings can be modified.

2. Level 2: Only LED status, SV and PV can be read. Only SV can be modified.

3. Level 3: All SV can be read. Only SV and auto-tuning can be modified.

4. Level 4: No password protection.

When a password is set (in 106EH ~ 1070H), the protection will enter Level 1. To enter other levels, enter the

corresponding password (in 106BH ~ 106DH). After DTC1000/2000 is switched off, the protection will return to Level 1.

To unlock the password protection, the user has to remove all the passwords (in 106EH ~ 1070H).

The password protection level can be read in 106EH ~ 1070H:

bit b0 b1 b2 b3 b4 b5 b6

Status Level 1

Level 2

Level 3

Level 1 locked Level 2 locked Level 3 locked Unlocked

bit = 0 refers to no password is set. bit = 1 refers to the password has been set (b0 ~ b2). b3 ~ b6 display the current level status.

 Synchronous Communication Protocol & Auto ID Setup

This function allows the user to set the communication protocol of DTC2000 to the same protocol as set in the first

DTC1000. The station IDs of DTC1000/2000 are arranged in decreasing order. Follow the steps below.

1. Set the auto communication ID of DTC1000 to “1” (communication address: 1022H).

2. Switch off DTC1000 before connecting it to DTC2000. Switch it on again.

3. Default communication protocol: 9,600bps, 7 bits, Even, 1 stop bit, communication address 01.

4. This function will consume 3 ~ 5 seconds more when you switch on your DTC.

 RS-485 Communication

1. Supports transmission speed: 2,400, 4,800, 9,600, 19,200, 38,400bps;

2. Does not support 7, N, 1 / 8, E, 2 / 8, O, 2 communication format;

3. Communication protocol: Modbus ASCII/RTU;

4. Function code: 03H (read Max. 8 words in register), 06H (write 1 word into register), 01H (read Max. 16 bits of

data), 05H (write 1 bit into register).

Address Setting Content Explanation

1000H Present temperature value (PV)

Unit: 0.1 degree. Analog input: 1EU.

The read values below indicate the occurrence of errors:

8002H: Temperature not acquired yet

8003H: Temperature sensor not connected

8004H: Incorrect sensor type

8006H: Unable to acquire temperature, ADC input error

8007H: Unable to read/write the memory

1001H 0 Set point (SV) Unit: 0.1 degree. Analog input: 1EU.

1002H 6,000 Upper-limit of temperature range The content shall not be bigger than the range. Unit: 0.1°

1003H -200 Lower-limit of temperature range The content shall not be smaller than the range. Unit: 0.1°

1004H 12 Input sensor type See the table in “Input” section.

1005H 0 Control method 0: PID, 1: ON/OFF, 2: Manual, 3: programmable PID

1007H 4 Control cycle of Output 1 0 ~ 99, 0: 0.5sec

1008H 4 Control cycle of Output 2 0 ~ 99, 0: 0.5sec (Invalid when the 2 outputs are the same

control.)

1009H 476 Proportional band value 1 ~ 9,999, Unit: 0.1°. Analog input: 1EU

100AH 260 Ti value 0 ~ 9,999

100BH 41 Td value 0 ~ 9,999

100CH 0 Default integration value 0 ~ 1,000, Unit: 0.1%

100DH 0

Offset compensation value for proportional

control (when Ti=0)) 0 ~ 1,000, Unit: 0.1%

100EH 100 COEF setting when in dual control output 1 ~ 9,999, Unit: 0.01

100FH 0

Deadband setting when in dual control

output -999 ~ 9,999, Unit: 0.1° or 1EU

1010H 0 Hysteresis of Output 1 0 ~ 9,999, Unit: 0.1° or 1EU

1011H 0 Hysteresis of Output 2 0 ~ 9,999, Unit: 0.1° or 1EU

1012H 0 Read/write output percentage of Output 1 Unit: 0.1%. “Write” is only applicable in manual mode.

1013H 0 Read/write output percentage of Output 2 Unit: 0.1%. “Write” is only applicable in manual mode.

1014H 0 Upper-limit regulation for analog linear output

1 scale = 2.8μA = 1.3mV

1015H 0 Lower-limit regulation for analog linear output

1 scale = 2.8μA = 1.3mV

1016H 0 Temperature offset regulation value -999 ~ +999, Unit: 0.1° or 1EU

1020H 0 Output mode for Alarm 1 See “Alarm Output” section.

1021H 0 Output mode for Alarm 2 See “Alarm Output” section.

1022H 0 Communication flag auto-set 0: Communication banned, 1: Communication auto-set

1024H 40 Upper limit for Alarm 1 See “Alarm Output” section.

1025H 40 Lower limit for Alarm 1 See “Alarm Output” section.

1026H 40 Upper limit for Alarm 2 See “Alarm Output” section.

1027H 40 Lower limit for Alarm 2 See “Alarm Output” section.

102AH Read/write status b1: ALM2, b2: °C, b3: °F, b4: ALM1, b5: O2, b6:O1, b7: AT

102CH 0 Positive/negative proportional output 0: positive, 1: negative

102EH LED status b0: RUN, b1: ERR, b2: O2, b3: O1, b4: RX, b5:TX b6: AT

102FH Software version V1.00 is indicated as 0x100

1030H 0 No. of start pattern 0 ~ 7

1032H Remaining time of the executed step Unit: second

1033H Remaining time of the executed step Unit: minute

1034H No. of currently executed step 0 ~ 7

1035H No. of currently executed pattern 0 ~ 7

1037H 1,000 Upper limit of proportional output 0 ~ 100% upper limit of analog output, Unit: 0.1%

1038H 0 Lower limit of proportional output 0 ~ 100% lower limit of analog output, Unit: 0.1%

1040H~

1043H 7 Number of steps in a pattern 0 ~ 7 = N refers to the pattern will be executed from Step 0

to Step N.

1050H~

1053H 0 Additional number of cycles for a pattern 0 ~ 199 refers to the pattern will be executed for 1 ~ 200

times.

1060H~

1063H 0 No. of the link pattern for the current

pattern

0 ~ 8, 8 refers to end of the program. 0 ~ 7 refers to the

next pattern No. following the current pattern.

1068H 1 Run/Stop setting 0: Stop, 1: Run, 2: Program end, 3: Program hold

1069H 0 Control selection of Output 1 0: Heating, 1: Cooling, 2: Alarm, 3: Proportional output

106AH 0 Control selection of Output 2 0: Heating, 1: Cooling, 2: Alarm

106BH 0

Unlock Level 1 password protection.

Read/write allowed Shall be the same as Level 1 password (106E)

106CH 0

Unlock Level 2 password protection. Use

Level 3. Shall be the same as Level 2 password (106F)

106DH 0

Unlock Level 3 password protection. Use

Level 2 Shall be the same as Level 3 password (1070)

106EH 0

Unlock Level 1 password protection/Set up

password Unlock password before setting it up.

106FH 0

Unlock Level 2 password protection/Set up

password Unlock password before setting it up.

1070H 0

Unlock Level 3 password protection/Set up

password Unlock password before setting it up.

1071H 1 Read/write communication address 1 ~ 247

1072H 0 Read/write communication format 1: RTU, 0: ASCII

1073H 2 Read/write communication speed 0 ~ 4: 2,400 ~ 38,400

1074H 1 Read/write communication data length 0: 8 bits, 1: 7 bits

1075H 1 Read/write parity bit 0: None, 1: Even, 2: Odd

1076H 1 Read/write stop bit 0: 2 stop bits, 1: 1 stop bit

2000H~

203FH 0 SV temperature for Pattern 0 ~ 7.

SV for Pattern 0 is set in 2000H ~ 2007H Unit: 0.1°

2080H~

20BFH 0 Execution time for Pattern 0~7.

Time for Pattern 0 is set in 2080H ~ 2087H 0 ~ 900 (1 scale = 1 minute)

5. Address and content of the bit register (read bits are stored starting from LSB, and written data is FF00H, set the

bit as 1. 0000H sets the bits data to “0”).

0811H Temperature unit display 0:°F, 1: °C (Default)

0813H Read/write auto-tuning status 0: End (Default), 1: Start

0814H Run/Stop setting 0: Stop, 1: Run (Default)

0815H Program hold flag 1: Program hold

0816H Program stop flag 1: Program stop

6. Communication format: Command 01: read bit, 05: write bit, 03: read word, 06: write word.

y ASCII Mode

Read Command Read Response Message Write Command Write Response Message

Start word ’:’

’:’

Start word ’:’

’:’

Start word ’:’

’:’

Start word ’:’

’:’

Machine address 1 ‘0’

‘0’

Machine address 1 ‘0’

‘0’

Machine address 1 ‘0’

‘0’

Machine address 1 ‘0’

‘0’

Machine address 0 ‘1’

‘1’

Machine address 0 ‘1’

‘1’

Machine address 0 ‘1’

‘1’

Machine address 0 ‘1’

‘1’

Command 1 ‘0’

‘0’

Command 1 ‘0’

‘0’

Command 1 ‘0’

‘0’

Command 1 ‘0’

‘0’

Command 0 ‘3’

‘1’

Command 0 ‘3’

‘1’

Command 0 ‘6’

‘5’

Command 0 ‘6’

‘5’

‘1’

‘0’

‘0’

‘0’

‘1’

‘0’

‘1’

‘0’

‘0’

‘8’

Length of response data

(byte) ‘4’

‘2’

‘0’

‘8’

‘0’

‘8’

‘0’

‘1’

‘0’

‘1’

‘0’

‘1’

‘0’

‘1’

Read staring address of

data/bit

‘0’

‘0’

‘1’

‘7’

Write data address

‘1’

‘0’

Write data address

‘1’

‘0’

‘0’

‘0’

‘F’

‘0’

‘0’

‘F’

‘0’

‘F’

‘0’

‘0’

Data content in

1000H/081xH

‘4’

‘1’

‘3’

‘F’

‘3’

‘F’

‘0’

‘0’

‘0’

‘E’

‘0’

‘E’

‘0’

Read length of data/bit

(word/bit)

‘2’

‘9’

‘0’

To write data content

‘8’

‘0’

Write data content

‘8’

‘0’

LRC1 check ‘E’

‘D’

‘0’

LRC1 ‘F’

‘E’

LRC1 ‘F’

‘E’

LRC0 check ‘A’

‘D’

Data content in 1001H

‘0’

LRC0 ‘D’

‘3’

LRC0 ‘D’

‘3’

End word 1 CR

CR

LRC1 check ‘0’

‘E’

End word 1 CR

CR

End word 1 CR

CR

End word 0 LF

LF

LRC0 check ‘3’

‘4’

End word 0 LF

LF

End word 0 LF

LF

End word 1 CR

CR

End word 0 LF

LF

y LRC Check

LRC check sums up from “machine address” to “data content”, e.g. 01H + 03H + 10H+ 00H + 00H + 02H = 16H. Obtain 2’s

complement EA.

y RTU Mode

Read Command Read Response Message Write Command Write Response Message

Machine address

01H

01H

Machine address 01H

01H

Machine address

01H

01H

Machine address 01H

01H

Command 03H

01H

Command 03H

01H

Command 06H

05H

Command 06H

05H

10H

08H

10H

08H

10H

08H

Read start address

of data 00H

10H

Length of response

data (byte) 04H

02H

Write data address

01H

10H

Write data address

01H

10H

00H

00H

01H

17H

03H

FFH

03H

FFH

Read length of data

(bit/word) 02H

09H

Data content 1

F4H

01H

Write data content

20H

00H

Write data content

20H

00H

CRC low byte C0H

BBH

03H

CRC low byte DDH

8FH

CRC low byte DDH

8FH

CRC high byte CBH

A9H

Data content 2

20H

CRC high byte E2H

9FH

CRC high byte E2H

9FH

CRC low byte BBH

77H

CRC high byte 15H

88H

y CRC Program Example

unsigned int reg_crc = 0xffff; i = 0;

while (length--)

{

reg_crc ^= RTUData[i];

i ++;

for (j = 0; j < 8; j++)

{

if (reg_crc & 0x01) reg_crc = (reg_crc >> 1) ^ 0xA001;

else reg_crc = reg_crc >> 1;

}

}

return(reg_crc);

 Installation

How to connect maximum 8 DTC1000/2000 controllers by using DIN rail.

 How to Set Up Current Input

For general input For current input (4 ~ 20mA, 0 ~ 20mA)

JUMPER

PIN HEADER

JP1

DEFAULT SETTING

JUMPER

PIN HEADER

JP1

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