FANUC Alarm PTPG-004 — Critical IO is invalid
FANUC PTPG-004 (“Critical IO is invalid”): This error is usually caused by a system failure. First check: Check TPE instructions.
Updated 2026-08-29 · LogrobotLM reference
Description
This error is usually caused by a system failure.
Remedy · Remède
Check TPE instructions. Cycle power on controller.
Frequently asked · Questions fréquentes
- What does FANUC alarm PTPG-004 mean?
- FANUC PTPG-004 (“Critical IO is invalid”): This error is usually caused by a system failure.
- How do you troubleshoot FANUC alarm PTPG-004?
- Check TPE instructions. Cycle power on controller.
Related codes / Codes liés
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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →