NETWORK FAULT

What does CnF mean?

This fault indicates a communication error detected on the installed communication option card (e.g., CANopen, DeviceNet, Profibus). The specific fault code values often depend on the particular network card and its configuration. The fault code remains saved even if the cause temporarily disappears and only resets after a power cycle. Persistent communication faults will prevent proper network control of the drive, leading to system shutdown or loss of automation.

Complete Troubleshooting Guide

1. 1

   Check the physical communication bus connection to the option card for security and correct wiring.

2. 2

   Consult the manual for the corresponding communication option card for specific diagnostics and troubleshooting steps related to the network protocol.

3. 3

   Power cycle the drive to reset the fault after rectifying the communication issue, as the fault code is saved and doesn't auto-clear.

4. 4

   Verify the network configuration parameters in both the drive and the PLC/controller.