Omron CJ1W-SCU22, Operation Manual, Page: 316 / 478

9 Troubleshooting and Maintenance
9-38
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Event name System Setup Error Event code 34A4 0000 hex
Meaning There is an error in the system settings for the Serial Communications Unit.
Source PLC Function Module Source details CJ-series Unit Detection
timing At power ON or
Controller reset
Error attributes Level Minor fault Recovery Cycle the power
supply or reset
the Controller. Log category System
Effects User program Continues. Operation 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.
System-defined
variables Variable Data type Name
None --- ---
Cause and
correction Assumed cause Correction Prevention
There is an error in the system set-
tings for the Serial Communications
Unit. Check the system settings for the
Serial Communications Unit and cor-
rect any problems. Make the correct system settings for
the Serial Communications Unit.
Attached
information Attached information 1: Port number where error was detected
Precautions/
Remarks None
Event name DTR Check Error Event code 0475 0000 hex
Meaning An error was found during the DTR check.
Source PLC Function Module Source details CJ-series Unit Detection
timing During loopback
test
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
Loopback test jig failure. Correct any mistakes in wiring the
loopback test jig. Check the wiring of the loopback test
jig.
Noise Implement noise countermeasures. Use the Unit away from sources of
noise. Implement noise countermea-
sures.
The communications circuits in the
Serial Communications Unit are
faulty. Replace the Unit. None
Attached
information Attached information 1: Port number where error was detected
Precautions/
Remarks None