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.

• Physical disconnection or damage to the network communication cable (e.g., Ethernet, Profibus-DP).
• Incorrect network address (e.g., P5-02) or subnet mask configuration on the drive's communication card.
• Faulty or improperly seated communication option card in the drive's expansion slot.
• Network master device not communicating or experiencing a fault itself.
• Missing or incorrect network termination resistors on the bus (e.g., for RS-485 based networks).

Click steps to track your progress.

1. 1

   1. Inspect the network cable connected to the option card for physical damage and ensure it is securely connected.

2. 2

   2. Verify the drive's network address (P5-02) and other network parameters (e.g., P5-03) match the system's configuration.

3. 3

   3. Reseat the communication option card firmly in its expansion slot within the drive.

4. 4

   4. Check the diagnostic LEDs on the communication option card for specific error indicators.

5. 5

   5. Test network communication from the master device to other nodes on the same network segment.