Appendix B Modbus TCP Communication
B-3
B_
B.3
Exception Response Code in Modbus TCP
Modbus exception response codes that DVP-15MC series motion controller supports are
shown in the table below.
Exception response code
Indication
16#01
Unsupportive function code
16#02
Unsupportive Modbus address
16#03
Data length exceeds the range
B.4
Modbus Function Codes in Modbus TCP
Function code: 03 to read one single or multiple word register values
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
Byte6
Modbus ID
Low byte
Byte7
Function code
Single byte
Byte8
The start address of word registers to be
read
High byte
Byte9
Low byte
Byte10
The number of word registers
(Counted by Word)
High byte
Byte11
Low byte
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
Содержание DVP-15MC Series
Страница 16: ...1 1 1 Preface Table of Contents 1 1 Explanation of Symbols in This Manual 1 2 1 2 Revision History 1 3...
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Страница 20: ...2 1 2 Overview Table of Contents 2 1 Product Description 2 2 2 2 Functions 2 2 2 3 Profile and Components 2 3...
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