10
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750-654, 750-654/000-001 [Data Exchange Module]
Process
Image
WAGO-I/O-SYSTEM
750
I/O
Modules
RxD+
RxD-
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
TxD+
TxD-
M
S
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
EN
+5V
10k
10k
Internal
Output byte 0
Output byte 1
Output byte 2
Output byte 3
Output byte 4
Input byte 0
Input byte 1
Input byte 2
Input byte 3
Input byte 4
Control byte
Status byte
control unit
Fig. 2.1.1-5: Internal Structure
g065403e
2.1.1.8 Process Image
Using the module 750-654, a 6 byte input and output process image can be
transferred to the fieldbus coupler / controller via one logical channel. The
data sent and received are stored in up to 5 output and input bytes (D0 ... D4).
One control byte (C) and one status byte (S) are used to control the data flow.
Attention
The representation of the process data of some I/O modules or their variations
in the process image depends on the fieldbus coupler/-controller used. Please
take this information as well as the particular design of the respective
control/status bytes from the section "Fieldbus Specific Design of the Process
Data" included in the description concerning the process image of the
corresponding coupler/controller.
Input data
Output data
S
Status byte
C
Control byte
D0
Input byte 0
D0
Output byte 0
D1
Input byte 1
D1
Output byte 1
D2
Input byte 2
D2
Output byte 2
D3
Input byte 3
D3
Output byte 3
D4
Input byte 4
D4
Output byte 4
Control byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0 X X X X X X X
