Delta Electronics DVP15MC11T User Manual

Appendix A. Modbus Communication
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 Example
To read the contents of address 0x0000 and 0x0001 in DVP15MC11T via function code 03.
0x0000 and 0x0001 are the Modbus addresses of %MW0 and %MW1 in DVP15MC11T
respectively.
Suppose the value of %MW0 is 0x0001 and %MW1 is 0x0002:
Request message: 01 03 00 00 00 02 C4 0B
Response message: 01 03 04 00 01 00 02 2A 32
 Function code 06 writes one single word register value
 Data structure of a request message:
Byte NO. Name Byte
Byte0
Modbus ID Single byte
Byte1
Function code Single byte
Byte2
DVP15MC11T register address where to
write the value
High byte
Byte3
Low byte
Byte4
The written value
High byte
Byte5
Low byte
Byte6
Low byte of CRC check sum Low byte
Byte7
High byte of CRC check sum High byte
 Data structure of a response message:
Byte NO. Name Byte
Byte0
Modbus ID Single byte
Byte1
Function code Single byte
Byte2
DVP15MC11T word register address where
to write the value
High byte
Byte3
Low byte
Byte4
The written value
High byte
Byte5
Low byte
Byte6
Low byte of CRC check sum Low byte
Byte7
High byte of CRC check sum High byte
 Data structure of an exception response message:
Byte NO. Name Byte
Byte0
Modbus ID Single byte
Byte1
0x80+ function code Single byte
Byte2
Exception response code Single byte
Byte3
Low byte of CRC check sum Low byte
Byte4
High byte of CRC check sum High byte
 Example
Write 0x0100 to the address 0x0000 in DVP15MC11T via function code 06.
Request message: 01 06 00 00 01 00 88 5A
Response message: 01 06 00 00 01 00 88 5A
 Function code 0x10 writes multiple word register values
 Data structure of a request message:
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Delta Electronics DVP15MC11T Specifications

General

Brand	Delta Electronics
Model	DVP15MC11T
Category	Controller
Language	English