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What is an NST on ATV630 process drive display?

What is an nSt on ATV630 or ATV650 process drive display?

Product Line:
Process drive, ATV630, ATV650


NSt = Drive state for freewheel stop.

NSt = Drive state for freewheel stop.

Trouble shooting tips:
1. Check menu 5, 5.8 generic functions , stop configuration, freewheel stop assignment.  If it is set to a digital input , then that input must be ON before the drive can run.
2. Pushing the STOP key on the HMI will trigger NST if your run command is coming from the terminal inputs.  Cycle drive power to clear it.
3. If a run command is present when power is applied to the drive and tCt (2 wire type) is not set to LEL (level), NST will be triggered.

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