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How do I wire and troubleshoot the TMC4AI2 Analog Input Cartridge?

Published date: 26 August 2019

Issue
How do I wire and troubleshoot the TMC4AI2 Analog Input Cartridge? I am not getting a value for current input, how do I troubleshoot?

Product Line
Modicon TMC4 Cartridges for M241 PLC

Environment
Physical PLCs

Resolution
Ensure that if you are using 0..20mA or 4..20mA Current Input (which is set from the "I/O Configuration Tab), that both AI0_I and AI0_V (or AI1_I and AI1_V) are wired.
See the wiring diagram below:


While logged in, you can check the Diagnostic bits of the cartridge.
In EcoStruxure Machine Expert (or SoMachine) from the "I/O Mapping" tab the diagnostic bits are addressed by default as follows:  
  • %IX8.2 - 24V Fault (when TRUE)
  • %IX8.5 - Channel 0 has out of range voltage/current (when TRUE)
  • %IX8.6 - Channel 1 has out of range voltage/current (when TRUE) 
Reference:
"Modicon TMC4 - Cartridges, Hardware Guide"
https://www.schneider-electric.com/en/download/document/EIO0000001776/
The wiring diagram is on p47  

 

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