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ABB Error 71424 — DeviceNet Lean bus off

Error

ABB 71424 (“DeviceNet Lean bus off”): DeviceNet Lean bus off: the bus controller has entered the bus off state due to an excessive frame error rate. Likely part: Bus DeviceNet Lean / Câblage (Bus DeviceNet Lean / Câblage).

Updated 2026-10-22 · LogrobotLM reference

What it means

DeviceNet Lean bus off: the bus controller has entered the bus off state due to an excessive frame error rate. All communication on the bus is interrupted.

What to check

  • Check the bus power supply and both termination resistors.
  • Check the quality of the cable and drop lines, and that the maximum length is respected.
  • Look for a faulty unit by disconnecting the nodes one by one.
  • Restart the cabinet after correction.
  • Note: Global network symptom: triggers in a cascade with several 71367.

Part to check / replace

ABB 71424 points to the hardware below — start here before ordering.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.

Related codes

41555I/O unit / Bus cable / Process equipment fault71058I/O unit communication lost7129924 V DeviceNet power supply fault

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →