What is NST on the ATV61 or ATV71? | Schneider Electric Belgium

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What is NST on Altivar and Altivar Process Drives

Issue:
NST on the AC Drives

Resolution:
NSt = Drive state for freewheel stop.
Troubleshooting tips:
1. Check menu 1.7 application function, stop configuration, and freewheel stop assignment. If it is set to a logic 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 the run command 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.
4. If the drive is being controlled over a communication network, must give the drive a run command through come, or will show a nst.

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