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Why after motor is commanded to stop can it wobble at 1hz or so?

Issue:
After motor is commanded to stop it wobbles at 1hz or so?

Product Line:
Altivar drives ATV61 ATV71

Environment:
All

Cause:
Electrical Interference or Noise

Resolution:
Seeing a noise-type or stray voltage on AI1 and AI2 in monitoring. 
 - Go to Inputs/Outputs Cfg Menu > AI1 and AI2 Configuration > AI1 and AI2 Filter and set to 10.
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