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ABB Error 34312 — Drive Unit / Ethernet cabling fault

Error

ABB 34312 (“Drive Unit / Ethernet cabling fault”): Drive Unit missing for a configured joint. Likely part: Drive unit / Ethernet cabling.

Updated 2026-10-22 · LogrobotLM reference

What it means

Drive Unit missing for a configured joint.

What to check

  • Check the presence of the unit, its position, the cables between drive units, the logic power supply and 24 V; also check the power supply messages.
  • Note: Very useful after replacing or modifying a power module.

Part to check / replace

ABB 34312 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

34100Drive system fault34200Axis Computer / Drive Units fault34201Drive Unit 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 →