COF

CANopen Communication Fault

Schneider Electric · Altivar 312 Variable Frequency Drive

What does COF mean?

This fault indicates a detected communication problem on the CANopen network. It means the drive is unable to send or receive data from other devices on the bus, leading to loss of control or monitoring via CANopen.

Complete Troubleshooting Guide

  1. 1

    Check the physical CANopen bus connections for loose wires, shorts, or breaks.

  2. 2

    Verify the CANopen communication parameters (baud rate, node ID) are correctly configured on the drive and all connected devices.

  3. 3

    Check that CANopen network termination resistors are correctly installed and of the appropriate value.

  4. 4

    Consult the CANopen option card manual for specific troubleshooting steps.

Source: Schneider Electric Manual