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FANUC Alarm SYST-020 — WARN Program not verified by PNS

FANUC SYST-020 (“WARN Program not verified by PNS”): Program specified by PNS is different from current selected program. First check: Select a correct program from the program select menu on the teach pendant

Updated 2026-09-17 · LogrobotLM reference

Description

Program specified by PNS is different from current selected program. This error occurs in R-J Mate only

Remedy

Select a correct program from the program select menu on the teach pendant

Related codes

SYST-018WARN Continuing from different lineSYST-019WARN Program not selectedSYST-021WARN System not ready, press resetSYST-022WARN PNS not zero, cannot continue

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 →