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F556 Torque proving fault in ABB DCS880 drive

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F556 fault in ABB DCS880 drive indicates Torque proving issue. This means the acknowledge signal for torque proving is missing.

  1. Check the setting of 44.19 M1 brake torque proving time.
  2. Check the Adaptive Program, application program or overriding control providing the torque proving OK signal. See 06.11.b04 Auxiliary control word 2.
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