264 • I/O Modules
Process Data Architecture for MODBUS/TCP
WAGO-I/O-SYSTEM
750
BACnet/IP Controller
750-638, 753-638
The above Counter Modules have a total of 6 bytes of user data in both the In-
put and Output Process Image (4 bytes of counter data and 2 bytes of con-
trol/status). The two counter values are supplied as 16 bits. The following ta-
bles illustrate the Input and Output Process Image, which has a total of 4
words mapped into each image. Word alignment is applied.
Input Process Image
Byte Destination
Offset
High Byte
Low Byte
Remark
0
-
S0
Status byte of Counter 1
1
D1
D0
Counter Value of Counter 1
2
-
S1
Status byte of Counter 2
3
D3
D2
Counter Value of Counter 2
Output Process Image
Byte Destination
Offset
High Byte
Low Byte
Remark
0
-
C0
Control byte of Counter 1
1 D1 D0
Counter
Setting Value of Counter 1
2
-
C1
Control byte of Counter 2
3 D3 D2
Counter
Setting Value of Counter 2