LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

FANUC Alarm SVGN-056 — STOP $GUNNUN is invalid number.

FANUC SVGN-056 (“STOP $GUNNUN is invalid number.”): Specified number is not valid for $GUNNUM. First check: $GUNNUM can be set only 1 or 2 which is corresponding to GUN1 or GUN2

Updated 2026-09-17 · LogrobotLM reference

Description

Specified number is not valid for $GUNNUM.

Remedy

$GUNNUM can be set only 1 or 2 which is corresponding to GUN1 or GUN2

Related codes

SVGN-054STOP $EQNUM is invalid number.SVGN-055STOP $EQNUM is not Servo Gun.SVGN-057STOP Tip Wear Down Cal. is IMCOMP.SVGN-058STOP UT or UF is different.

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 →