FANUC Alarm ARC-055 — No sync Eq

Manufacturer wording — No sync Eq (%s^4,%d^5)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC ARC-055 (“No sync Eq”): An Arc Start instruction specified synchronizing with an Equipment that is not also doing an Arc Start. First check: Determine why the sync Equipment is not starting, or do not use synchonization.

Updated 2026-09-17 · LogrobotLM reference

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 →