ABB Error 71394 — Invalid physical communication channel
ErrorABB 71394 (“Invalid physical communication channel”): “Invalid physical communication channel” is an ABB IRC5 event of major severity. Likely part: DSQC 1003 (ABB controller board (DSQC series)).
Updated 2026-10-23 · LogrobotLM reference
What it means
“Invalid physical communication channel” is an ABB IRC5 event of major severity.
Part to check / replace
ABB 71394 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 →