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A7C1 warning in ABB DCS880 drive

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A7C1 warning in ABB DCS880 drive indicates FBA A communication error. This means Cyclical communication between PLC and fieldbus adapter module A or between drive and fieldbus adapter module A is lost.

  1. Check the status of the fieldbus communication.
  2. Check the settings of groups 50 Fieldbus adapter (FBA), 51 FBA A settings, 52 FBA A data in and 53 FBA A data out.
  3. Check the cable connections. The fieldbus termination.
  4. Check the fieldbus adapter.
  5. Check that the master is able to communicate.
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