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FANUC Alarm PRIO-191 — AB-RIO Board Init Error

FANUC PRIO-191 (“AB-RIO Board Init Error”): There was a problem initializing the AB-RIO hardware. First check: - z No Board: check that board is installed and dip switches are set properly.

Updated 2026-09-17 · LogrobotLM reference

Description

There was a problem initializing the AB-RIO hardware. The PRIO-191 alarm code will include a cause code with the reason.

Remedy

- z No Board: check that board is installed and dip switches are set properly. - z Failed to load/start/clear FW (firmware): firmware file is missing or corrupt or possibly a problem with the hardware.

Related codes

PRIO-188Sim. Skip output not definedPRIO-189WAIT will time outPRIO-192AB-RIO No Board FoundPRIO-193AB-RIO Failed to Load FW

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 →