Omron NX-ID User Manual page 226

9 Troubleshooting
TS indicator
Green
Not Lit FS (1 s)
Not Lit Lit
9 - 4
Cause
Red
NX Unit Output Synchronization
Error
NX Unit Clock Not Synchronized
Error
Correction
Refer to Event NX Unit Output Synchronization
Error on page 9-15.
Refer to Event NX Unit Clock Not Synchronized
Error on page 9-16.
NX-series Digital I/O Unit User's Manual (W521)