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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

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