EFB fault 3

What does 6686 mean?

This is another generic fault reserved for the embedded fieldbus (EFB) protocol application, indicating an unspecified error within the EFB communication stack or protocol execution. Like EFB fault 2, its exact meaning is dependent on the specific fieldbus protocol in use.

Complete Troubleshooting Guide

1. 1

   Consult the detailed documentation for the specific EFB protocol being used to interpret the meaning of 'EFB fault 3'.

2. 2

   Investigate any unusual activities or status reports from the fieldbus master.

3. 3

   If the documentation does not provide clear guidance, contact your local ABB representative.