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Starting and Stopping the motor with the speed reference.

FA242482

28 September 2021

Issue:
Is it standard practice to use the speed reference to start and stop the drive while keeping the run command enabled?

Product Line:
Altivar Machines

Environment:
All models and serial numbers

Cause:
N/A

Resolution:
No, it is not recommended to start and stop using the speed reference.  When the run command is enabled, the output transistors are biased on.  This can increase the opportunity for voltage transients to cause damage.  It is recommended to use a switch or relay to disable the run command when the drive is not called to run the motor.