Delta DVP-15MC Series, Operation Manual

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DVP-15MC Series Motion Controller Operation Manual
B-4
B
Byte NO. Name Byte
Byte7
Function code Single byte
Byte8
The number of read word registers.
(Counted by Byte)
Single byte
Byte9
The content value in a word register
High byte
Byte10 Low byte
…
The content value in a word register
High byte
Byte n Low byte

Exception response message data structure:
Byte NO. Name Byte
Byte0
Transaction identifier
High byte
Byte1
Low byte
Byte2
Protocol identifier
High byte
Byte3
Low byte
Byte4
Modbus data length
High byte
Byte5 Low byte
Byte6
Modbus ID Single byte
Byte7
16#80+ function code Single byte
Byte8
Exception response code Single byte

Example
To read the content value in the addresses 16#0000 and 16#0001 inside DVP-15MC series
motion controller via function code 03. 16#0000 and 16#0001 are the Modbus address of
%MW0 and %MW1 inside DVP-15MC series motion controller respectively. Suppose that the
value of %MW0 is 16#0100 and the value of %MW1 is 16#0200.
Request message: 00 00 00 00 00 06 01 03 00 00 00 02
Response message: 00 00 00 00 00 07 01 03 04 01 00 02 00

Function code: 06 to write one single word register value

Request message data structure:
Byte NO. Name Byte
Byte0
Transaction identifier
High byte
Byte1
Low byte
Byte2
Protocol identifier
High byte
Byte3
Low byte
Byte4
Modbus data length
High byte
Byte5
Low byte