ABB Error 39411 — Axis Computer / Drive Unit / link communication fault
ErrorABB 39411 (“Axis Computer / Drive Unit / link communication fault”): At least four consecutive communication packets have been lost between the Axis Computer and the Drive Unit. Likely part: Axis Computer / Drive Unit / Liaison communication (Axis Computer / Drive Unit / link communication).
Updated 2026-10-22 · LogrobotLM reference
What it means
At least four consecutive communication packets have been lost between the Axis Computer and the Drive Unit.
What to check
- Check the communication link, the module grounding and sources of electromagnetic interference; restart, then continue hardware isolation if recurrent.
- Note: Very relevant for diagnosing wiring, grounding and EMC before replacing a Drive Unit.
Part to check / replace
ABB 39411 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
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 →