Paul Ked Posted April 3, 2012 Report Posted April 3, 2012 I've just been playing with a machine that has an old A1S system (I can just about remember putting it in!) that a customer would like to put back into operation. As I was testing it through I took out a redundant A1SJ71C24 comms module without turning off the power supply Now I can't communicate at all!!! I've tried all the usual power up options and even removed everything bar the PSU and CPU off the backplane and tried but I continue to get the error "The connected PLC could not be recognized" <ES:15061102> The Error LED lights continuous and when switched to Run the Run LED flashes. I've googled it but can't find anything. Any ideas? Cheers Paul Ked Quote
Crossbow Posted April 4, 2012 Report Posted April 4, 2012 Never pull a card under power. That throws the PLC into error. To recover, power cycle the PLC. Worst case, perhaps the base unit was damaged by the discharge. Try another base unit. Quote
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