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FANUC Alarm SYST-034 — WARN HOLD signal from SOP/UOP is lost

FANUC SYST-034 (“WARN HOLD signal from SOP/UOP is lost”): HOLD input signal from SOP/UOP is lost First check: Determine and correct the cause of loss of this signal.

Updated 2026-09-17 · LogrobotLM reference

Description

HOLD input signal from SOP/UOP is lost

Remedy

Determine and correct the cause of loss of this signal.

Related codes

SYST-032WARN ENBL signal from UOP is lostSYST-033WARN SFSPD signal from UOP is lostSYST-035WARN Low or No Battery Power in PSU.SYST-036WARN Semi power failure recovery

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 →