Omron SYSMAC CJ1W-EIP21 - Manual (Page 370)

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Checking Status with the Network Configurator Section 14-1
Error History Tab Page The Error History Tab Page displays the error log stored in the EtherNet/IP
Unit or built-in EtherNet/IP port. Errors that occurred in the past are recorded,
and can be cleared or saved in a computer file as required.
In some cases, error records are cleared when the power is turned OFF, and
in other cases the records are retained. For details on the error log, refer to
14-4 Error Log Function.
Controller Error History
Tab Page The error history of the CPU Unit for the EtherNet/IP Unit or built-in EtherNet/
IP port is displayed on this tab page. The error history shows errors that have
occurred. It can be cleared or saved in a file in the computer.