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Why will my drive not accept program changes?

Issue: 
Why will my drive will not accept program changes?

Product Line:
ATV12, ATV312, ATV61,ATV71, ATV312, ATV32 

Environment:
All

Cause:
Unable to assign drive parameters, Drive will not accept changes.

Resolution:
Typical reasons that a VFD will not allow a parameter to be changed:
Verify the drive does not have an active run command.  Most parameters changes require the VFD to not be in run status.
Verify the parameter is not incompatible with other parameter settings. 
 
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