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
Ensure that there is at least one other active device physically present on the CAN bus.
- 2
Verify that all devices on the CAN bus have identical communication configuration, such as baud rate and node ID settings.
Verified technical data. Last updated: March 2026
Related Faults
Source: Vacon NX Liquid-Cooled Drive