What does error code 16 mean in KM-FPS?

What is the stopper cylinder entry rear limit sensor and what does it do?

What is X11 machine code and how can it help with error 16?

Can you explain how to check the X
The solution for the stopper cylinder entry rear limit sensor being abnormal and displaying "please check X11" is to verify the sensor's wiring and ensure that the X11 connector is properly connected. If the