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A0912 alarm in siemens micromaster 430 or MM430 drive

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(@click2electro)
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How can resolve problem A0912 alarm in siemens micromaster 430 or MM430 drive ?

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Posts: 8753
Admin
Topic starter
(@click2electro)
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Joined: 3 years ago

Cause : Vdc-min controller active. Vdc min controller will be activated if DC-link voltage (r0026) falls below minimum level (P2172). The kinetic energy of the motor is used to buffer the DC-link voltage, thus causing deceleration of the drive

So short mains failures do not necessarily lead to an undervoltage trip.

 

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