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Priscilla LawrenceAug 4, 2025
Why is the ERROR/ALARM LED on my NAiS Controller ON?
- JJennifer GreenAug 4, 2025
The ERROR/ALARM LED might be on for several reasons: * The system watchdog timer may have been activated, stopping FP0 operation. To resolve this, set the mode switch from RUN to PROG. and cycle the power OFF and then ON. * The program execution time might be too long. Review your program for instructions like JP or LOOP that could prevent a scan from finishing. * Interrupt instructions might be executed in succession. * You can also try setting the mode switch from PROG. to RUN.
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