Allen Bradley PowerFlex 40, PowerFlex 40P & PowerFlex 400 Drive
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Mar 09, 2024 5:42 am
Cause : Comm Loss comes when communications between the drive and the Modbus or DSI master device have been interrupted. RS485 (DSI) port stopped communicating.
1. Check RS485 wiring connection.
2. Check if a communications adapter or HIM was disconnected.
3. Increase C106 [Comm Loss Time] to an appropriate time for application.
4. Change C105 [Comm Loss Action] to a value other than “0” (fault), if appropriate for the application.
