In the event that you encounter an ECxx error, you must perform the following action.
Power cycle the PLC exactly one time.
Connect to the PLC with Unity
Select Help\About Unity Pro\ Technical Support
Generate the file and send it along to Technical Support.
The file will be sent to R&D for further analysys
After performing the previous step you can attempt to recover the PLC by performing a download of the application.
Finally, if the ECxx error is repeatable you should replace the CPU.
Legacy KB System (APS) Data: RESL212325 V1.0, Originally authored by DaSo on 08/16/2013, Last Edited by DaSo on 08/16/2013
Related ranges: Modicon Quantum