Troubleshooting; Cpu Unit's Err/Alm Indicator Lit Or Flashing - Omron CJ1W-CORT21 Operation Manual

6 Troubleshooting and Maintenance
6-4

Troubleshooting

6-4-1

CPU Unit's ERR/ALM Indicator Lit or Flashing

Error
An I/O setting check error occurred.
Special Unit access is denied.
An I/O Bus check error occurred.
Refer to the NJ-Series CPU Unit Hardware User's Manual (Cat. No. W500) and NJ-Series CPU Unit
Software User's Manual (Cat. No. W501) for more details on these errors.
6-10
• Make sure that the Unit is mounted properly.
• The CPU Bus Unit model registered in the Unit Configuration in the CPU
Unit does not match the actual Unit Configuration. Compare using "Syn-
chronize" operation and use one of the following procedures.
• Correct the Unit number setting
• Correct the project Unit Configuration and transfer to the CPU Unit
• Make sure that the Unit is mounted properly.
• Restart the Unit. If operation is not restored even after the Unit is
restarted, replace the Unit.
• Make sure that the Unit is mounted properly.
• Restart the Unit. If operation is not restored even after the Unit is
restarted, replace the Unit.
CJ-series User Defined CAN Unit Operation Manual for NJ-series CPU Unit (W517)
Probable cause