I/O Modules
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173
Process Data Architecture for MODBUS/TCP
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Input Process Image
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Diagnostic
bit S 3
Channel 2
Diagnostic
bit S 2
Channel 2
Diagnostic
bit S 1
Channel 1
Diagnostic
bit S 0
Channel 1
Output Process Image
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
not
used
not
used
controls
DO 2
Channel 2
controls
DO 1
Channel 1
4 Channel Digital Output Modules
750-504, -516, -519, -531, 753-504, -516, -531, -540
Output Process Image
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
controls
DO 4
Channel
4
controls
DO 3
Channel
3
controls
DO 2
Channel
2
controls
DO 1
Channel
1
4 Channel Digital Output Modules with Diagnostics and Input Process
Data
750-532
The 750-532 digital output modules have a diagnostic bit for each output
channel. When an output fault condition occurs (i.e., overload, short circuit, or
broken wire), a diagnostic bit is set. The diagnostic data is mapped into the
Input Process Image, while the output control bits are in the Output Process
Image.
Input Process Image
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Diagnost
ic bit S 3
Channel
4
Diagnost
ic bit S 2
Channel
3
Diagnost
ic bit S 1
Channel
2
Diagnosti
c bit S 0
Channel
1
Diagnostic bit S = '0'
no Error
Diagnostic bit S = '1'
overload, short circuit, or broken wire
