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FANUC Alarm VISN-004 — WARN Circle not found in the image

FANUC VISN-004 (“WARN Circle not found in the image”): FOUND_CIRCLE cannot determine the circle parameters because the location tool in the vision process failed to find the circle in the image. First check: Use the vision training menus to determine why the circle was not found, and retrain the location tool if necessary.

Updated 2026-09-17 · LogrobotLM reference

Description

FOUND_CIRCLE cannot determine the circle parameters because the location tool in the vision process failed to find the circle in the image.

Remedy

Use the vision training menus to determine why the circle was not found, and retrain the location tool if necessary. Add logic to the vision KAREL program to call the FOUND_OK built-in to check if the vision process found the circle before calling FOUND_CIRCLE. Do not call FOUND_CIRCLE if FOUND_OK returns FALSE.

Related codes

VISN-002PAUSE Offset unknown-feature missingVISN-003WARN Feature not found in the imageVISN-005WARN Line not found in the imageVISN-006WARN Ellipse not found in the image

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