Omron CJ1W-SCU32 Operation Manual page 315

Event name Error Log Data Error
Meaning An error occurred in the error log data.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
There is a source of noise nearby.
Non-volatile memory failure
Attached None
information
Precautions/ None
Remarks
Event name Protocol Data Error
Meaning A protocol data checksum error has occurred.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
The communications connector with
the CX-Protocol was disconnected or
the power supply to the Controller
was interrupted during transfer of the
protocol data from the CX-Protocol.
The Serial Communications Unit
failed.
Attached None
information
Precautions/ None
Remarks
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Source details
Minor fault Recovery
Continues. Operation
Data type
---
Correction
Implement noise countermeasures.
If the above cause does not apply,
replace the Unit.
Source details
Minor fault Recovery
Continues. Operation
Data type
---
Correction
Transfer the protocol data again from
the CX-Protocol.
If this error occurs after transferring
the protocol data again, replace the
Serial Communications Unit.
9 Troubleshooting and Maintenance
Event code 04740000 hex
CJ-series Unit Detection
timing
Cycle the power Log category
supply.
The Unit will stop if the error was detected in the self
check when the power supply was cycled or the Controller
was reset. Operation continues if the error occurs during
operation.
Name
---
Prevention
Use the Unit away from sources of
noise.
None
Event code 14800000 hex
CJ-series Unit Detection
timing
Cycle the power Log category
supply or reset
the Controller.
The Serial Communications Unit will not operate in Proto-
col Macro Mode. This error has no affect on operation in
Host Link mode.
Name
---
Prevention
Do not interrupt the power supply to
the Controller during transfer of proto-
col data.
None
Continuously
System
At power ON or
Controller reset
System
9
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