WAGO 750 Series Manual page 161

Serial Interface Modules with Standard Data Format
750-650/000-001, -014, -015, -016
750-651/000-001
750-653/000-001, -006
The above Serial Interface Modules with Standard Data Format have a
total of 6 bytes of user data in both the Input and Output Process Image
(5 bytes of serial data and 1 byte of control/status). The following table
illustrates the Input and Output Process Image, which have a total of 3
words mapped into each image. Word alignment is applied.
Data Exchange Module
750-654, (and the variation /000-001)
The Data Exchange modules have a total of 4 bytes of user data in both the
Input and Output Process Image. The following tables illustrate the Input
and Output Process Image, which has a total of 2 words mapped into each
image. Word alignment is applied.
WAGO-I/O-SYSTEM 750
Linux Fieldbus Coupler
Input and Output Process Image
Byte Destination
Offset
High Byte
0 D0
1 D2
2 D4
Input and Output Process Image
Byte Destination
Offset
High Byte
0 D1
1 D3
Process Data Architecture for MODBUS/TCP
Low Byte
C/S Data byte
D1
D3
Low Byte
D0
D2
I/O Modules • 157
Remark
Control/Status byte
Data bytes
Remark
Data bytes