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ATV58 drive with the message display center is faulting on Communication Failed K/P Stop Not Active?

Issue:
ATV58 drive with the message display center is faulting on Communication Failed K/P Stop Not Active?

Product Line:
Altivar ATV58 with the optional Message display keypad only

Environment:
All

Cause:
The main MDC is red showing a fault Communication Failed K/P Stop Not Active

Resolution:
Trouble shooting tips.
1st make sure that the drive is powered up.  This Message Display Center is powered up by an external +24vdc power supply.  If the main drive is not powered up and the remote MDC is powered up you will get the Communication Failed K/P Stop Not Active fault.
 
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