Omron NJ501-1 Series User Manual page 209

Event name Unsupported Unit Setting
Meaning A setting in the Special Unit is not supported.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
A setting in the Special Unit is not
supported by the CPU Unit.
Attached None
information
Precautions/ None
Remarks
* This event code was added for unit version 1.02 of the CPU Unit.
Event name Illegal Packet Discarded
Meaning An illegal packet was received during message communications. The illegal packet was discarded.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
Noise
• There is data corruption in bus sig-
nals.
Attached None
information
Precautions/ None
Remarks
NJ-series CPU Unit Hardware User's Manual (W500)
Source details
Observation Recovery
Continues. Operation
Data type
---
Correction
Change the setting of the Special Unit
where the error occurred so that all
Special Unit settings are supported by
the CPU Unit.
Source details
Observation Recovery
Continues. Operation
Data type
---
Correction
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.
5 Troubleshooting
Event code 30200000hex*
I/O bus master Detection
timing
--- Log category
Not affected.
Name
---
Prevention
Refer to the manual for the CPU Unit
and use only Special Unit settings
that are supported.
Event code 80010000 hex
I/O bus master Detection
timing
--- Log category
Not affected.
Name
---
Prevention
Implement noise countermeasures.
Continuously
System
5
Continuously
System
5-43