WAGO-I/O-SYSTEM 750
I/O Modules 329
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
Table 350: Incremental Encoder Interface Modules 750-634
Input Process Image
Byte Destination
Offset
High Byte
Low Byte
Description
0
-
S
not used
Status byte
1 D1
D0
Counter
word
2
-
(D2) *)
not used
(Periodic time)
3 D4
D3
Latch
word
*)
If cycle duration measurement mode is enabled in the control byte, the cycle duration is
given as a 24-bit value that is stored in D2 together with D3/D4.
Output Process Image
Byte Destination
Offset
High Byte
Low Byte
Description
0
-
C
not used
Control byte
1 D1
D0
Counter
setting
word
2 -
-
3 -
-
not used
750-637
The above Incremental Encoder Interface Module has a total of 6 bytes of user
data in both the Input and Output Process Image (4 bytes of encoder data and 2
bytes of control/status). The following table illustrates the Input and Output
Process Image, which have 4 words mapped into each image. Word alignment is
applied.
Table 351: Incremental Encoder Interface Modules 750-637
Input and Output Process Image
Byte Destination
Offset
High Byte
Low Byte
Description
0
-
C0/S0
Control/Status byte of Channel 1
1
D1
D0
Data Value of Channel 1
2
-
C1/S1
Control/Status byte of Channel 2
3
D3
D2
Data Value of Channel 2