5 Troubleshooting
5-54
NJ-series CPU Unit Hardware User’s Manual (W500)
* This event code occurs for unit version 1.02 or later of the CPU Unit.
Event name Unsupported Unit Setting Event code 3020 0000hex*
Meaning A setting in the Special Unit is not supported.
Source PLC Function Module Source details I/O bus master Detection
timing
Continuously
Error attributes Level Observation Recovery --- Log category System
Effects User program Continues. Operation Not affected.
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
A setting in the Special Unit is not
supported by the CPU Unit.
Change the setting of the Special Unit
where the error occurred so that all
Special Unit settings are supported by
the CPU Unit.
Refer to the manual for the CPU Unit
and use only Special Unit settings
that are supported.
Attached
information
None
Precautions/
Remarks
None
Event name Illegal Packet Discarded Event code 80010000 hex
Meaning An illegal packet was received during message communications. The illegal packet was discarded.
Source PLC Function Module Source details I/O bus master Detection
timing
Continuously
Error attributes Level Observation Recovery --- Log category System
Effects User program Continues. Operation Not affected.
System-defined
variables
Variable Data type Name
None --- ---
Cause and
correction
Assumed cause Correction Prevention
Noise
• There is data corruption in bus sig-
nals.
Cycle the power to the Controller and
see if this 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.
Attached
information
None
Precautions/
Remarks
None
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