LogrobotLM

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FANUC Alarm SVGN-128 — Invalid thickness value specified.

FANUC SVGN-128 (“Invalid thickness value specified.”): A string parameter or a value less than 0.0 was passed into the THK_VAL macro. First check: Re-enter a parameter value greater than or equal to 0.0 into the thickness value macro.

Updated 2026-08-29 · LogrobotLM reference

Description

A string parameter or a value less than 0.0 was passed into the THK_VAL macro.

Remedy · Remède

Re-enter a parameter value greater than or equal to 0.0 into the thickness value macro.

Frequently asked · Questions fréquentes

What does FANUC alarm SVGN-128 mean?
FANUC SVGN-128 (“Invalid thickness value specified.”): A string parameter or a value less than 0.0 was passed into the THK_VAL macro.
How do you troubleshoot FANUC alarm SVGN-128?
Re-enter a parameter value greater than or equal to 0.0 into the thickness value macro.

Related codes / Codes liés

SVGN-126Servo parameters exceed max gun torque.SVGN-127DSP max gun torque update timeout.SVGN-129Invalid thickness tolerance specified.SVGN-130Invalid thickness severity specified.

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →