EFB comm loss

What does 6681 mean?

A communication break has occurred in the embedded fieldbus (EFB) communication link. This means the drive has lost its connection with the fieldbus master, leading to a loss of control and monitoring capabilities via the EFB, which can halt automated processes.

Complete Troubleshooting Guide

1. 1

   Check the operational status of the fieldbus master (e.g., online, offline, error status).

2. 2

   Inspect all physical cable connections to the EIA-485/X5 terminals 29, 30, and 31 on the control unit for secure and correct wiring.

3. 3

   Verify termination resistors and addressing on the fieldbus network.