Delta D25886 User Manual Page 282

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Appendix A
DVP-MC operating manual A-19
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 response message:
Data order Name Byte
Byte0
Modbus ID
Single byte
Byte1
Function code
Single byte
Byte2 High byte
Byte3
The start address of DVP10MC11T word device where
to write the value.
Low byte
Byte4 High byte
Byte5
The address number of DVP10MC11T word device
where to write the value.
Counted by Words
Low byte
Byte6
Low byte of CRC check sum
Low byte
Byte7
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:How many bytes of data in request message are determined by the number of word-device address
where to write the value in the response message. Thus n of “Byte n” in request message can be
calculated through the number of device address where to write the value.
¾ Example: Write 0x0100 and 0x0200 to 0x1000 and 0x1001 address in DVP10MC11T respectively via
function code 0x10. 0x1000 and 0x1001 are Modbus address of D0 and D1 in DVP10MC11T.
Request message: “ 01 10 10 00 00 02 04 01 00 02 00 3E F3”
Response message: “01 10 10 00 00 02 45 08”.
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