Control Word Timeout

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The drive has not received a valid control word from the external controller (e.g., PLC via fieldbus) within the expected timeframe. This indicates a communication failure, causing the drive to stop or trip for safety reasons.

• Interruption or failure of the fieldbus communication link (e.g., disconnected cable, network switch fault).
• The fieldbus master controller (e.g., PLC) has stopped sending a valid control word within the configured timeout period.
• Incorrect fieldbus configuration parameters in the drive (e.g., P8-01, Fieldbus Address; P8-02, Baud Rate) or in the master.
• Drive parameter P8-10 (Control Word Timeout) is set to a value that is too short for the network latency or PLC cycle time.
• Faulty fieldbus option card in the drive preventing reception or processing of control words.

Klikk på steg for å spore fremgangen.

1. 1

   1. Inspect the fieldbus communication cable (e.g., Ethernet, Profibus) for physical damage, loose connections, or incorrect shielding at both the drive and the master controller.

2. 2

   2. Verify the operational status of the fieldbus master (e.g., PLC), checking its diagnostic LEDs and internal diagnostic buffer for communication errors.

3. 3

   3. Confirm that all fieldbus parameters in the drive (e.g., P8-01, Fieldbus Address; P8-02, Baud Rate) precisely match the settings in the master controller.

4. 4

   4. Monitor the drive's fieldbus status (e.g., P8-03, Fieldbus Status Word) and confirm that control words are being received consistently from the master.

5. 5

   5. Increase the drive parameter P8-10 (Control Word Timeout) to a longer duration (e.g., 5-10 seconds) if transient network delays are suspected, after confirming network stability.