Nidec & Control Techniques Commander C200, C300, NE200 & NE300 Drive
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Apr 10, 2024 5:19 am
Cause : Motor frequency has exceeded the over frequency threshold- In open-loop mode, if the Post-ramp Reference (02.001) exceeds the threshold set in the Over Frequency Threshold (03.008) in either direction, an O.SPd trip is produced.
In RFC-A mode, if the Estimated Frequency (03.002) exceeds the Over Frequency Threshold in Pr 03.008 in either direction an O.SPd trip is produced. If Pr 03.008 is set to 0.00 the threshold is then equal to 1.2 x the value set in Pr 01.006.
- Reduce the Frequency Controller Proportional Gain (03.010) to reduce the frequency overshoot (RFC-A mode only).
- Check that a mechanical load is not driving motor.
- Reduce Current Controller Ki Gain (04.014).
