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FANUC Alarm CVIS-221 — Histogram tool: Fail to set reference position.

FANUC CVIS-221 (“Histogram tool: Fail to set reference position.”): An internal histogram error has occurred. First check: Document the events that led to the error, and contact your FANUC or FANUC Robotics technical representative.

Updated 2026-09-17 · LogrobotLM reference

Description

An internal histogram error has occurred.

Remedy

Document the events that led to the error, and contact your FANUC or FANUC Robotics technical representative.

Related codes

CVIS-219Histogram tool is not trained.CVIS-220Histogram tool: Fail to get reference position.CVIS-222Sub tool is not trained.CVIS-223Conditional Execution: Fail to set measurement.

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 →