9 Troubleshooting
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NX-series Safety Control Unit User’s Manual (Z930)
Details on the errors (events) that can occur in the Safety CPU Unit are given in the following tables.
System Errors
Safety CPU Unit
Event name System Error Event code 05200000 hex
Meaning A hardware error was detected during self-diagnosis of the hardware.
Source Depends on where the Sysmac Stu-
dio is connected and the system con-
figuration.
Source details NX Unit Detection timing Continuously
Error attributes Level Minor fault Recovery Cycle the power
supply to the
Unit.
Log category System
Effects User program Continues. Operation The Unit stops operating and the I/O data changes to the
safe states.
System-defined
variables
Variable Data type Name
None None None
Cause and
correction
Assumed cause Correction Prevention
Hardware has failed. Cycle the power supply. If the error
occurs again, replace the Unit.
If cycling the power supply restores
normal operation, there may be
excessive noise near the Unit. Imple-
ment noise countermeasures.
A memory error occurred due to a
transient cause, such as a software
error or excessive noise.
Attached
information
Attached information 1: System information, status code
Attached information 2: System information, status code
Attached information 3: System information, status code
Attached information 4: System information, status code
Precautions/
Remarks
None