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5.5.5 Example of modbus RTU General commands
5.5.4 70 (0x46) Read/Write Module Command Sets
5.5.5.1 (00257) Protocol, EDAM ASCII & Modbus select
¾
(00257) Read protocol and return modbus RTU is select (01).
Request : 01 01 01 00 00 01 [FC 36]
Response: 01 01 01 01 [90 48]
This function code is used to read the settings of the module or change the
settings of the module.
The following sub-function codes are supported:
Sub-Function
Description
code
00 (0x00) Read module name
04 (0x04) Set the module address
05 (0x05) Read the communication settings
06 (0x06) Set the BaudRate, communication protocol and CRC check
32 (0x20) Read the firmware version
33 (0x21) Set Digital Input Count Edge
34 (0x22) Read Digital Input Count Edge
39 (0x27) Set Power-On output value
40 (0x28) Read Power-On output value
41 (0x29) Set DIO active status
42 (0x2A) Read DIO active status
53 (0x35) Read the response delay time
54 (0x36) Set the response delay time
128 (0x80) Set Digital input/output LED Configuration
129 (0x81) Read Digital input/output LED Configuration
Sec.
5.5.8.1
5.5.8.2
5.5.8.3
5.5.8.4
5.5.8.5
5.5.8.6
5.5.8.7
5.5.8.8
5.5.8.9
5.5.8.10
5.5.8.11
5.5.8.13
5.5.8.12
5.5.8.14
5.5.8.15
Error Response:
If the function specified in the message is not supported, then the module
Response as follows:
Offset
00
01
02
Function
Address
Function code
Exception code
Length
1 Byte
1 Byte
1 Byte
Description
1 to 247
0xC6
= 02 - invalid sub-function code
¾
(00257) Set to EDAM ASCII protocol and return successful
Request : 01 05 01 00 00 00 [CC 36]
Response: 01 05 01 00 00 00 [CC 36]
¾
(00257) Read protocol and return (0x00) EDAM ASCII is select
Request : 01 01 01 00 00 01 [FC 36]
Response: 01 01 01 00 [51 88]
5.5.5.2 (00272)Load factory calibration parameters
¾
(00272) Load factory calibration parameters and wait 1sec for response.
Request : 01 05 01 0F FF 00 [BD C5]
Response: 01 05 01 0F FF 00 [BD C5]
5.5.5.3 (02208)CRC checking status
(02208) Read CRC checking status and return CRC disable (00)
Request : 01 01 08 9F 00 01 [CF 84]
Response: 01 01 01 00 [51 88]
¾
(02208) Set CRC checking to enable and return successful
Request : 01 05 08 9F FF 00 [BE 74]
Response: 01 05 08 9F FF 00 [BE 74]
¾
(02208) Set CRC checking to disable and return successful
Request : 01 0F 08 9F 00 01 01 00 [BB C3]
Response: 01 0F 08 9F 00 00 [A6 45]
5.5.5.4 (02210)Reset the module to initial power-on status
¾
(02210) Reset the module to initial power-on status and return
successful
Request : 01 05 08 A1 FF 00 [DF B8]
Response: 01 05 08 A1 FF 00 [DF B8]
If a CRC mismatch occurs, the module will not respond.
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