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FANUC Alarm SRVO-244 — SERVO Chain 1 abnormal(Rbt:…)

Manufacturer wording — SERVO Chain 1 abnormal(Rbt:%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC SRVO-244 (“SERVO Chain 1 abnormal(Rbt:…)”): A single chain 1 (+24V) failure occurred. First check: Repair the circuit of the chain 1 (+24V) on the hardware.

Updated 2026-09-17 · LogrobotLM reference

Description

A single chain 1 (+24V) failure occurred.

Remedy

Repair the circuit of the chain 1 (+24V) on the hardware. Set CHAIN FAILURE detection to TRUE on the SYSTEM/CONFIG screen. Press RESET on the teach pendant.

Related codes

SRVO-242SERVO Chain 1 (EXEMG) abnormalSRVO-243SERVO Chain 2 (EXEMG) abnormalSRVO-245SERVO Chain 2 abnormal(Rbt:…)SRVO-246Chain 1 abnormal(EX_robot)

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 →