34

CAN bus communication

Vacon · NX Liquid-Cooled Drive

What does 34 mean?

A message sent on the CAN bus was not acknowledged by another device. This typically indicates a communication problem between devices on the bus.

Common Causes

  • CAN bus communication error (e.g., bus off).
  • No acknowledgement from CAN network devices.
  • Incorrect CAN bus termination or cabling.
  • Node ID conflict on the CAN network.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure that there is at least one other active device physically present on the CAN bus.

  2. 2

    Verify that all devices on the CAN bus have identical communication configuration, such as baud rate and node ID settings.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Vacon NX Liquid-Cooled Drive