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A004 alarm in siemens master drive

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(@click2electro)
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Cause : Alarm startup of 2nd SLB comes when startup of the 2nd SIMOLINK ring does not function due to faulty connection.

  1. Check the fiber optic cable ring for any disconnections.
  2. Check whether an SLB in the ring is without voltage.
  3. Check whether an SLB in the ring is faulty.
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