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6 Troubleshooting
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
6-2 Troubleshooting
6
6-2-4 Error Descriptions
*1 For details, refer to I/O Operation for Major Fault Level Controller Errors on page 6-8.
Event name Main Memory Check Error Event code 10080000 hex
Meaning An error was detected in the memory check of the main memory in the CPU Unit.
Source PLC Function Module Source details None Detection
timing
Continuously
Error attributes Level Major fault Recovery Cycle the power
supply.
Log category System
Effects User program Stops. Operation
Stops.
*1
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
Conductive material has gotten
inside.
If there is conductive material nearby,
blow out the CPU Unit with air.
Do not do any metal working in the
vicinity of the control panel. Use the
control panel only when it is closed.
Noise
• Data corruption in memory
• Microcomputer malfunctioning
• Memory write circuit malfunctioning
If the error did not result from the
above causes, cycle the power to the
Controller and see if that clears the
error.
If the error occurs frequently, check
the FG, power supply lines, and other
noise entry paths, and implement
noise countermeasures as required.
Implement noise countermeasures.
There is a software error.
• Data corruption was caused by cos-
mic rays or radiation.
If the error did not result from the
above causes, and cycling the power
to the Controller or resetting the Con-
troller does not clear the error,
replace the CPU Unit.
None
The CPU Unit has failed.
• Memory element failure
• Memory peripheral circuit failure
Perform regular inspections.
Attached
information
Attached information 1: System information
Precautions/
Remarks
None
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