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ATV61 - Cannot change the speed display from Hertz to percentage

Issue:
Programming changes to my drive are being lost and the parameters return to the previous settings.

Product line:
All Altivar drives and Altistart soft starters.

Environment:
All models, All serial numbers.

Cause:
Unexpected behavior

Resolution:
If a run command is present, or if the drive is in freewheel mode (NST), programming changes can not be made on the drive for most parameter.   Be certain that the drive state is ready (RDY) before making programming changes to the drive.
 
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