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What would cause an EPF1 fault on the ATV32 and ATV320 drives?

Issue:
What would cause an EPF1 fault on the ATV32 and ATV320 drives?

Product Line:
Altivar ATV32 and ATV320 drive

Environment:
All 

Cause:
External fault logic input is active?

Resolution:
Needs to check the digital inputs to see if there is a log input assigned to Ext fault. 
FLT menu 
ETF= External Fault assignment for logic input. 
LET= External Fault config Trip on High or Low 
EPL=External Fault mgt Freewheel stop etc

 
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