WAGO WAGO-I/O-SYSTEM 750 XTR User Manual

162 Fieldbus Communication WAGO-I/O-SYSTEM 750 XTR
750-352/040-000 FC ETHERNET G3 XTR
Manual
Version 1.3.0
11.2.3.6 Function Code FC6 (Write Single Register)
This function writes the value of one single output register to a slave device in
word format.
Request
The request specifies the reference number (register address) of the first output
word to be written. The value to be written is specified in the “Register Value”
field. The reference number of the request is zero based; therefore, the first
register starts at address 0.
Example: Write a value of 0x1234 to the second output register
Table 88: Request of Function Code FC6
Byte
Field name
Example
Byte 0, 1
Transaction identifier
0x0000
Byte 2, 3
Protocol identifier
0x0000
Byte 4, 5
Length field
0x0006
Byte 6
Unit identifier
0x01 not used
Byte 7
MODBUS function code
0x06
Byte 8, 9
Reference number
0x0001
Byte 10, 11
Register value
0x1234
Response
The reply is an echo of the inquiry.
Table 89: Response of Function Code FC6
Byte
Field name
Example
...
Byte 7
MODBUS function code
0x06
Byte 8, 9
Reference number
0x0001
Byte 10, 11
Register value
0x1234
Exception
Table 90: Exception of Function Code FC6
Byte
Field name
Example
...
Byte 7
MODBUS function code
0x85
Byte 8
Exception code
0x01 or 0x02
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WAGO WAGO-I/O-SYSTEM 750 XTR Specifications

General

Brand	WAGO
Model	WAGO-I/O-SYSTEM 750 XTR
Category	I/O Systems
Language	English