Delta D25886 User Manual Page 280

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Appendix A
DVP-MC operating manual A-17
Data order Name Byte
Byte n+2 Low byte of CRC check sum Low byte
Byte n+3 High byte of CRC check sum High byte
Data structure of abnormality response message:
Data order Name Byte
Byte0 Modbus ID Single byte
Byte1 0x80+ function code Single byte
Byte2 abnormality response code Single byte
Byte3 Low byte of CRC check sum Low byte
Byte4 High byte of CRC check sum High byte
Note: The byte number in response message is determined by the DVP10MC11T device address number to
be read in the request message. Thus n of “Byte n” in response message can be calculated through
reading DVP10MC11T device address number.
¾ Example: To read the address content of 0x1000, 0x1001 in DVP10MC11T via function code 03.
0x1000, 0x1001 are the Modbus address of D0 and D1 in DVP10MC11T respectively.
Suppose the value of D0 is 0x0100; D1 is 0x020
Request message: “ 01 03 10 00 00 02 C0 CB”
Response message: “01 03 04 01 00 02 00 FA AF”
Function code: 06 to write single word-device register value
Data structure of request message:
Data order Name Byte
Byte0 Modbus ID Single byte
Byte1 Function code Single byte
Byte2 High byte
Byte3
DVP10MC11T device address where to write the value
Low byte
Byte4 High byte
Byte5
The written value
Low byte
Byte6 Low byte of CRC check sum Low byte
Byte7 High byte of CRC check sum High byte
Data structure of response message:
Data order Name Byte
Byte0 Modbus ID Single byte
Byte1 Function code Single byte
Byte2 High byte
Byte3
DVP10MC11T word device address where to write the
value
Low byte
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