Omron Sysmac NJ-series User Manual page 495

15 Troubleshooting
 Controller Log Tab Page
This tab page displays the Controller event log that is stored in the CPU Unit. The error history
shows errors that have occurred. It can be saved in a file in the computer. Refer to the operation
manual of the CPU Unit for details on error information.
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NJ/NX-series CPU Unit Built-in EtherNet/IP Port User's Manual (W506)