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FANUC Alarm MOTN-481 — CS: Can't execute simul-motion

FANUC MOTN-481 (“CS: Can't execute simul-motion”): The robot could not synchronize with external/virtual clock First check: The following items are considered to this alarm.

Updated 2026-09-17 · LogrobotLM reference

Description

The robot could not synchronize with external/virtual clock

Remedy

The following items are considered to this alarm. Please check them and fix the cause. 1: It is possible for clock speed to be faster than the robot motoion. Please make the clock speed do more slowly than current one. 2: It is possible for motion sentence in TP program to be slower than the colck speed. If the program speed can be faster than current one, make it faster than current program speed. 3: It is possible for motion sentence in TP program to be slower than the colck speed. If the program speed can be faster than current one, make it faster than current program speed.

Related codes

MOTN-473CS: Both of EXT. & VR. clock validMOTN-474CS: Can't CLSM with the optionMOTN-482CS: Can't start simul-motionMOTN-483CS: Can't do simul-motion on the way

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 →