Mitsubishi FR-A Series- FR-A800, FR-A770/A701, FR-A700, FR-A800-E, FR-A741 Drive
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Apr 01, 2024 4:49 am
Cause : Communication fault (inverter) comes when the inverter trips when communication error occurs consecutively for the permissible number of retries or more when Pr.335 RS-485 communication retry count "9999" during RS-485 communication from the RS-485 terminals. The inverter also trips if communication is broken for the period of time set in Pr.336 RS-485 communication check time interval.
- Check the RS-485 terminal wiring.
- Perform wiring of the RS-485 terminals properly.
