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9.4.20
Corrupted User Program on Power-Up (Group 130)
The fault group Corrupted User Program on Power-Up occurs when the CPU detects corrupted user
RAM. The CPU will remain in STOP Mode.
Action: Non-configurable.
1, Corrupted user RAM on power-up
The CPU generates this error when it detects corrupted user RAM on power-up.
Recommended Corrections, Listed in Order
1) 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 cycle
The CPU generates this error when it detects a battery failure that occurred while the controller was
powered down.
If this fault occurs on a power cycle when the battery was not detached or replaced, the battery has
failed and should be replaced.
Correction
Replace the battery on the CPU. For instructions on replacing the battery, refer to the PACSystems
Battery 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-sweep
processing software in the CPU. The fault extra data contains the name of the task that was
executing when the error occurred.
Action: Non-configurable.
0, Window Completion Failure
The CPU generates this error when it is operating in Constant Sweep mode and the constant sweep
time was exceeded before the programmer window had a chance to begin executing.
Correction
Increase the constant sweep timer value.
1, Logic Window Skipped
The logic window was skipped due to lack of time to execute.
Correction
1) Increase base cycle time.
2) Reduce Communications Window time.
GFK-2950C
February 2018
Chapter 9. Diagnostics
417
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