FANUC Alarm SVGN-042 — Lack of $SGGUN
FANUC SVGN-042 (“Lack of $SGGUN”): The number of $SGGUN is less than total number of axes in the servo gun group(s). First check: Increase $SGSYSCFG.$M_GUN_NUM to the minimum value required to accommodate all servo gun axes.
Updated 2026-08-29 · LogrobotLM reference
Description
The number of $SGGUN is less than total number of axes in the servo gun group(s).
Remedy · Remède
Increase $SGSYSCFG.$M_GUN_NUM to the minimum value required to accommodate all servo gun axes. After changing this sysvar, go to control start, and then perform a Cold start, to make the change effective.
Frequently asked · Questions fréquentes
- What does FANUC alarm SVGN-042 mean?
- FANUC SVGN-042 (“Lack of $SGGUN”): The number of $SGGUN is less than total number of axes in the servo gun group(s).
- How do you troubleshoot FANUC alarm SVGN-042?
- Increase $SGSYSCFG.$M_GUN_NUM to the minimum value required to accommodate all servo gun axes. After changing this sysvar, go to control start, and then perform a Cold start, to make the change effective.
Related codes / Codes liés
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 →