EFB fault 2

What does 6685 mean?

This is a generic fault reserved for the embedded fieldbus (EFB) protocol application, indicating an unspecified error within the EFB communication stack or protocol execution. The precise cause and resolution are dependent on the specific fieldbus protocol implemented.

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.