FANUC Alarm IBSS-421 — Can't enable multiple Alt.Group

Manufacturer wording — %s:Can't enable multiple Alt.Group
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC IBSS-421 (“Can't enable multiple Alt.Group”): Please see manual IBS SYS FW G4 UM E from Phoenix Contact

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 →