A7991 fault in siemens sinamics V90 drive

A7991 alarm in siemens sinamics V90 drive indicates Motor data identification is activated. This means the drive is scheduled to automatically measure the motor's electrical characteristics at the next run command. 

Cause: The motor data ident. routine is activated. The motor data identification routine is carried out at the next power-on command.

Remedy: The alarm automatically disappears after the motor data identification routine has been successfully completed.
If a POWER ON or a warm restart is performed with motor data identification selected, the motor data identification request will be lost. If motor data identification is required, it will need to be selected again manually following ramp-up.

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