ABB ACS850 Drive
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Dec 20, 2021 9:13 am
How can resolve problem A2077 EFB COMM LOSS alarm in ABB ACS850 Drive ?
1 Reply
Dec 20, 2021 9:14 am
Cause : Embedded fieldbus interface has been taken into use, and there is a communication break between the drive and the master station.
Check:
• selection of the parameter which
enables/disables EFB communication
(58.01 Protocol ena sel)
• EFB connection at terminal XD2D on
the JCU control unit
• status of the fieldbus master (online/
offline)
• settings of the communication
supervision function (parameter 58.09
Comm loss action).
