FANUC Alarm MARL-031 — WARN %s Semaphore timeout
FANUC MARL-031 (“WARN %s Semaphore timeout”): This alarm indicates that there is a problem with the serial line used for the active gripper device. First check: You must clear the serial line by changing it in the PORT I/O menu from No Use to Host Comm and then back to No Use.
Updated 2026-08-29 · LogrobotLM reference
Description
This alarm indicates that there is a problem with the serial line used for the active gripper device.
Remedy · Remède
You must clear the serial line by changing it in the PORT I/O menu from No Use to Host Comm and then back to No Use. Follow these steps:
Frequently asked · Questions fréquentes
- What does FANUC alarm MARL-031 mean?
- FANUC MARL-031 (“WARN %s Semaphore timeout”): This alarm indicates that there is a problem with the serial line used for the active gripper device.
- How do you troubleshoot FANUC alarm MARL-031?
- You must clear the serial line by changing it in the PORT I/O menu from No Use to Host Comm and then back to No Use. Follow these steps:
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 →