Omron PROFINET NX-PNC202 User Manual page 232

12 Troubleshooting
12-2-2 Checking for Errors and Troubleshooting with the Indicators on
the NX Units
The TS indicator on an NX Unit tells you the status and level of any errors in the NX Unit.
Refer to the manuals for the individual NX Units for details on the other indicators on the NX Units.
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NX-series PROFINET Coupler Unit User's Manual (W623)