Hi all, After downloading my latest changes I get a message on the screen saying      "CPU Error Detected. Communications with the CPU cannot be established..." See attached screenshot for details. I have tried resetting the modules, have checked all the wiring, grounding etc. and can't find anything amiss there. Also, I can revert to an older version of the PLC and it will run for a short time before getting the Error message again. I'm not an expert with Unitronics but can't s