5-9
5 Troubleshooting
NJ-series CPU Unit Hardware User’s Manual (W500)
5-1 Operation after an Error
5
5-1-3 Non-fatal error in CPU Unit
Checking the Status of EtherCAT and EtherNet/IP Ports
For the EtherCAT and EtherNet/IP ports, use the EtherCAT and EtherNet/IP NET ERR indicators to
determine whether an error that affects process data communications has occurred and whether a
minor fault level error or higher-level error has occurred. The indicator lets you check the status
given in the following table.
When an error occurs, you can connect the Sysmac Studio online to the Controller to check current
Controller errors and the log of past Controller errors.
Current Errors
Open the Sysmac Studio’s Controller Error Tab Page to check the current error’s level, source,
source details, event name, event code, details, attached information 1 to 4, cause, and correction.
Errors are not displayed for observations.
Log of Past Errors
Open the Sysmac Studio’s Controller Log Tab Page to check the time of occurrence, level, source,
source details, event name, event code, details, attached information 1 to 4, and corrections for past
errors.
Error logs from CJ-series Special Units are displayed on the Controller Event Log Tab Page.
Detailed information is not displayed. To check detailed information, use the event codes that are
displayed and refer to the error codes that are given in the manual for the relevant Unit. Refer to the
NJ/NX-series Troubleshooting Manual (Cat. No. W503) for the relationship between error codes and
event codes.
Refer to the Sysmac Studio Version 1 Operation Manual (Cat. No. W504) for details on trouble-
shooting with the Sysmac Studio.
Indicator Indicated status
EtherCAT NET ERR EtherCAT Port Status
• Lit: An error for which normal status cannot be recovered through user
actions (i.e., errors for which you must replace the CPU Unit or contact your
OMRON representative) has occurred.
• Flashing: An error for which normal status can be recovered through user
actions has occurred.
• Not lit: An error that affects process data communications has not occurred.
EtherNet/IP NET ERR EtherNet/IP Port Status
• Lit: An error for which normal status cannot be recovered through user
actions (i.e., errors for which you must replace the CPU Unit or contact your
OMRON representative) has occurred.
• Flashing: An error for which normal status can be recovered through user
actions has occurred.
• Not lit: There is no minor fault level or higher-level error.
Checking with the Troubleshooting Function of Sysmac Studio
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