We'll need several items to forward to R&D which will be used to determine root cause of failure.

1: Please provide a copy of the application file in STA format (Archive Project).
2: What version of Unity or Control Expert are you using?
3: What is the S/N and PV level of the CPU? This info is visible in the LED window below
the display.
4: What version of CPU firmware, and what version of Copro firmware is being used?
You can use the Keypad and select System Info / Firmware .
5: After power cycling the PLC connect to the processor and
Select Help\About Unity Pro XL
Select Technical Support
Browse To a folder where the Diagnostic file will be stored
Select OK

Unity will generate a DIAG file and an Log file and place them into the folder declared above.
Send these files and the information described above to us .

Released for: Schneider Electric USA