Function Code Fc22 (Mask Write Register); Table 118: Request Of Function Code Fc22; Table 119: Response Of Function Code Fc22; Table 120: Exception Of Function Code Fc22 - WAGO -I/O-SYSTEM 750 Manual

WAGO-I/O-SYSTEM 750
750-882 Media Redundancy ETHERNET Controller

12.2.3.10 Function Code FC22 (Mask Write Register)

This function manipulates individual bits within a register using a combination of
an AND mask, an OR mask, and the register's current content.
Request

Table 118: Request of Function Code FC22

Byte
Byte 0, 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7
Byte 8, 9
Byte 10, 11
Byte 12, 13
Response

Table 119: Response of Function Code FC22

Byte
...
Byte 7
Byte 8, 9
Byte 10, 11
Byte 12, 13
Exception

Table 120: Exception of Function Code FC22

Byte
...
Byte 7
Byte 8
Field name
Transaction identifier
Protocol identifier
Length field
Unit identifier
MODBUS function code
Reference number
AND mask
OR mask
Field name
MODBUS function code
Reference number
AND mask
OR mask
Field name
MODBUS function code
Exception code
Fieldbus Communication 241
Example
0x0000
0x0000
0x0002
0x01 not used
0x16
0x0000
0x0000
0xAAAA
Example
0x10
0x0000
0x0000
0xAAAA
Example
0x85
0x01 or 0x02
Manual
1.5.0