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Why won't the ATV320 drive output full voltage at 60hz?

Issue:
Why won't the ATV320 drive output full voltage at 60hz? 

Product Line:
ATV320

Environment:
All serial numbers

Cause: 
Drive ramps to speed (60z) . The max drive output voltage is only 10 volts with "no" drive fault. 

Resolution:  
Set  MPC  to COS 
DRI- > CONF > FULL > DRC- > ASY   
MPC   [Motor param choice] >  [Mot Power]  = (nPr) , change to COS   [Mot Cos] (COS)
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