DO571 Output module problem
Greetings to all!
I am working on PM554. In that output expansion module DO571 connected. I have facing problem code 0234946507 i.e. process voltage too loo. PLC is in RUN mode but error light glowing. After error acknowledge error light off but in next power recycle it occur again.
There is bit 'Check Supply' in module paramter section, in default it is in 'On' state. After making it 'Off' error goes. but I want to know use of this bit. No reference found in help file.
Check also that you actually get 24v in the field when your digital Outputs are on. Cabling and relay faults can cause a significant voltage drop.
If the error clears when acknowledged and never occurs until the plc is power is recycled it is quite possiblly a transient problem due to the supply starting. check the voltage as the power is cycled.