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Why would a drive not stop when the run command is removed?

FA278295

23 January 2021

Issue:  
The drive does not stop, when the run command is removed.
 
Product Line:
Altivar 61, Altivar 71, Altivar 312, Altivar 212, Altivar12, Altivar 32
 
Environment:
All serial numbers
 
Cause:
The VFD is not responding to the stop command.
 
Resolution:
1).  Verify how the drive is receiving the stop command.
2).  Verify if the drive is programmed to get the stop command from that source. 
3).  Verify the drive is not in local control.
4).  Check if the run signal is jumpered/bypassed
5).  Check to see if the motor is backfeeding voltage back into the drive.