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6 Troubleshooting
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
6-1 Operation after an Error
6
6-1-3 Non-fatal Errors in the CPU Unit
Checking the Level of a Controller Error
You can use the POWER, RUN, and ERROR indicators to determine the event level for an error.
The following table shows the relationship between the Controller’s indicators and the event level.
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.
Refer to the Sysmac Studio Version 1 Operation Manual (Cat. No. W504) for details on trouble-
shooting with the Sysmac Studio.
Checking the Indicators
Indicator
Event level
POWER (green) RUN (green) ERROR (red)
Lit Not lit Lit Major fault level
Lit Lit Flashing (1-s intervals) Partial fault level
Minor fault level
Lit Lit Not lit Observation
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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