WAGO 750-872/020-000 Manual page 222

214 • Process Data Architecture for MODBUS/TCP
Digital Output Modules
4 Channel Digital Output Modules
750-504, -516, -519, -531, 753-504, -516, -531, -540
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.
Diagnostic bit S = '0'
Diagnostic bit S = '1'
Bit 7 Bit 6 Bit 5
Bit 7 Bit 6 Bit 5
Bit 7 Bit 6 Bit 5
Bit 7 Bit 6 Bit 5
Input Process Image
Bit 4 Bit 3
Diagnostic Diagnostic
bit S 3
Channel 2 Channel 2
Output Process Image
Bit 4 Bit 3
not used not used
Output Process Image
Bit 4 Bit 3
controls
DO 4
Channel
4
Input Process Image
Bit 4 Bit 3
Diagnost
ic bit S 3
Channel
4
no Error
overload, short circuit, or broken wire
Bit 2 Bit 1
Diagnostic
bit S 2 bit S 1
Channel 1
Bit 2 Bit 1
controls
DO 2
Channel 2
Bit 2 Bit 1
controls controls
DO 3 DO 2
Channel Channel
3 2
Bit 2 Bit 1
Diagnost Diagnost
ic bit S 2 ic bit S 1
Channel Channel
3 2
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Bit 0
Diagnostic
bit S 0
Channel 1
Bit 0
controls
DO 1
Channel 1
Bit 0
controls
DO 1
Channel
1
Bit 0
Diagnosti
c bit S 0
Channel
1