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FANUC Alarm SVGN-131 — Invalid gun index specified.

FANUC SVGN-131 (“Invalid gun index specified.”): A string parameter or a value other than 1, 2, or 3 was specified for gun index in a THK_ macro. First check: This parameter is optional but if it is specified, set it as follows: 1: Gun.A only 2: Gun.B only (dual gun case) 3: Gun.A+B (dual gun case)

Updated 2026-09-17 · LogrobotLM reference

Description

A string parameter or a value other than 1, 2, or 3 was specified for gun index in a THK_ macro.

Remedy

This parameter is optional but if it is specified, set it as follows: 1: Gun.A only 2: Gun.B only (dual gun case) 3: Gun.A+B (dual gun case)

Related codes

SVGN-129Invalid thickness tolerance specified.SVGN-130Invalid thickness severity specified.SVGN-133Encoder scale is NULL.SVGN-134Thickness Check Calibration Incomplete.

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 →