CANopen com.

What does COF mean?

This fault indicates a detected communication error on the CANopen communication card. This can be caused by wiring issues, incorrect CANopen node settings, or problems with the CANopen master device. Without resolving this, the drive will lose its CANopen network control capabilities, halting automated operation and remote diagnostics.

• Incorrect CANopen node ID (P5-10) or baud rate (P5-11) configured on the drive.
• Missing or incorrect bus termination resistors (120 Ohm) at the ends of the CANopen network segment.
• Damaged CAN_H and CAN_L wiring leading to signal integrity issues or short circuits.
• CANopen master device failure or incorrect configuration (e.g., not sending NMT messages).
• Excessive network cable length or incorrect cable type for CANopen specifications.

Click steps to track your progress.

1. 1

   1. Verify the drive's CANopen node ID (P5-10) and baud rate (P5-11) against the network configuration.

2. 2

   2. Measure the resistance across the CAN_H and CAN_L lines at the drive's CANopen connector (expect ~60 Ohm with two terminators).

3. 3

   3. Inspect the CANopen cabling for physical damage, proper shielding, and secure connections at all nodes.

4. 4

   4. Use a CANopen network analyzer tool to monitor bus traffic and identify communication errors or missing messages.

5. 5

   5. Ensure the CANopen master device is operational and correctly configured to communicate with the drive's node ID.