LogrobotLM

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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 2026-09-17 · LogrobotLM reference

Description

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

Remedy

Verify the master robot number in the slave program header.

Related codes

SYST-199Def Prog NOT change (TP disbl)SYST-200Only Master TP may FWD/BWDSYST-202Incorrect $rmt_master on Slave robotSYST-203Robot #… 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. How this reference is built →