Omron CJ1W-SCU32 Operation Manual page 316

9 Troubleshooting and Maintenance
Event name System Setup Error
Meaning There is an error in the system settings for the Serial Communications Unit.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
There is an error in the system set-
tings for the Serial Communications
Unit.
Attached Attached information 1: Port number where error was detected
information
Precautions/ None
Remarks
Event name DTR Check Error
Meaning An error was found during the DTR check.
Source PLC Function Module
Error attributes Level
Effects User program
System-defined Variable
variables
None
Cause and Assumed cause
correction
Loopback test jig failure.
Noise
The communications circuits in the
Serial Communications Unit are
faulty.
Attached Attached information 1: Port number where error was detected
information
Precautions/ None
Remarks
9-38
Source details
Minor fault Recovery
Continues. Operation
Data type
---
Correction
Check the system settings for the
Serial Communications Unit and cor-
rect any problems.
Source details
Observation Recovery
Continues. Operation
Data type
---
Correction
Correct any mistakes in wiring the
loopback test jig.
Implement noise countermeasures.
Replace the Unit.
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Event code 34A4 0000 hex
CJ-series Unit Detection
timing
Cycle the power Log category
supply or reset
the Controller.
Operation will be performed using the default setting for
the baud rate if there is an error in the baud rate setting.
Communications are not possible if there is an error in
other system settings.
Name
---
Prevention
Make the correct system settings for
the Serial Communications Unit.
Event code 0475 0000 hex
CJ-series Unit Detection
timing
--- Log category
Not affected.
Name
---
Prevention
Check the wiring of the loopback test
jig.
Use the Unit away from sources of
noise. Implement noise countermea-
sures.
None
At power ON or
Controller reset
System
During loopback
test
System