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Why does the ATV212 display a flashing StOP when changing from utility to generator power?

Issue:
Why does the ATV212 display a flashing StOP when changing from utility to generator power?

Product Line:
ATV21, ATV212

Environment:
All models and serial numbers.

Cause:
Momentary power loss removes output power to motor.

Resolution:
When F302, supply loss behavior, is enabled, then a brief loss of input power will cause the drive to remove power from the motor and display the flashing StOP alarm.  To restart operation, remove and reapply a new run command signal.  To disable this function and attempt to ride through the momentary loss of power, set F302 back to the factory default of 0.
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