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 → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm SYST-201 — Master mismatch

FANUC SYST-201 (“Master mismatch”): The master robot number does not match with the one specified in the slave header. First check: Verify the master robot number in the slave program header.

Updated 2026-08-29 · LogrobotLM reference

Description

The master robot number does not match with the one specified in the slave header.

Remedy · Remède

Verify the master robot number in the slave program header.

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-201 mean?
FANUC SYST-201 (“Master mismatch”): The master robot number does not match with the one specified in the slave header.
How do you troubleshoot FANUC alarm SYST-201?
Verify the master robot number in the slave program header.

Related codes / Codes liés

SYST-199Def Prog NOT change (TP disbl)SYST-200Only Master TP may FWD/BWDSYST-202Incorrect $rmt_master on Slave robotSYST-203Robot #%d has become online

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 →