Communication Network Interruption

Was bedeutet CnF ?

Indicates an interruption in communication with an NET option card. The fault code remains saved even if the cause disappears and is reset only after a power cycle. This prevents remote control or monitoring, leading to a loss of control over the connected equipment.

• Physical disconnection of the network cable (e.g., Ethernet, Profibus) from the NET option card on the drive.
• Faulty NET option card itself, preventing it from properly processing network messages.
• Incorrect network address or subnet mask configuration (e.g., Parameter P8-01, P8-02) for the option card.
• Loss of power to the network segment or the master device controlling the network communication.
• Excessive network traffic, collisions, or severe EMI (Electromagnetic Interference) leading to missed communication packets.

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1. 1

   1. Power cycle the drive to clear the saved fault code from the display and internal memory.

2. 2

   2. Verify the physical connection of the network cable (e.g., RJ45 connector) to the NET option card on the drive.

3. 3

   3. Check the status LEDs on the NET option card for indications of link activity or error states (e.g., Link/Act LED, Error LED).

4. 4

   4. Confirm the network address (e.g., Parameter P8-01) and communication settings match the network master's configuration.

5. 5

   5. Use network diagnostic tools (e.g., a network scanner, ping command) to verify communication with the drive's option card address.