FANUC Alarm HOST-300 — Can't connect to CNC

Manufacturer wording — Can't connect to CNC(%s)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC HOST-300 (“Can't connect to CNC”): Robot cannot connect to CNC. First check: Check the communication setup.

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 →