FANUC Alarm ARC-105 — STOPL Cannot read WSTK input signal
FANUC ARC-105 (“STOPL Cannot read WSTK input signal”): Cannot received WSTK signal from serial communication power supply. First check: Confirm which type of weld equip is used.
Updated 2026-09-17 · LogrobotLM reference
Description
Cannot received WSTK signal from serial communication power supply.
Remedy
Confirm which type of weld equip is used. Confirm the connection with serial communication power supply. Confirm the setting of serial port.
Related codes
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 →