Chapter 9. DiagnosticsGFK-2950C February 2018 4179.4.20 Corrupted User Program on Power-Up (Group 130)The fault group Corrupted User Program on Power-Up occurs when the CPU detects corrupted userRAM. The CPU will remain in STOP Mode.Action: Non-configurable.1, Corrupted user RAM on power-upThe CPU generates this error when it detects corrupted user RAM on power-up.Recommended Corrections, Listed in Order1) Cycle power without battery or Energy Pack.2) Examine any C applications for errors.3) Replace the volatile memory backup battery on the CPU.4) Replace the CPU.7, User memory not preserved over power cycleThe CPU generates this error when it detects a battery failure that occurred while the controller waspowered down.If this fault occurs on a power cycle when the battery was not detached or replaced, the battery hasfailed and should be replaced.CorrectionReplace the battery on the CPU. For instructions on replacing the battery, refer to the PACSystemsBattery and Energy Pack Manual, GFK-2741.9.4.21 Window Completion Failure (Group 131)The fault group Window Completion Failure is generated by the pre-logic and end-of-sweepprocessing software in the CPU. The fault extra data contains the name of the task that wasexecuting when the error occurred.Action: Non-configurable.0, Window Completion FailureThe CPU generates this error when it is operating in Constant Sweep mode and the constant sweeptime was exceeded before the programmer window had a chance to begin executing.CorrectionIncrease the constant sweep timer value.1, Logic Window SkippedThe logic window was skipped due to lack of time to execute.Correction1) Increase base cycle time.2) Reduce Communications Window time.
