What is the primary function of an elevator's controller?

The primary function of an elevator's controller is to manage the operational functions of the elevator. This includes overseeing the movement of the elevator car, controlling the door operations, and ensuring that the elevator responds appropriately to input from passenger buttons and safety systems. The controller interprets signals from the push buttons, safety devices, and other components to determine how to operate the elevator in a safe and efficient manner. By coordinating the different functions, the controller plays a crucial role in the reliable and smooth operation of the elevator system.

While functions like communication with passengers, tracking maintenance schedules, and enhancing energy efficiency are important aspects of an elevator's overall operation, these are secondary to the primary responsibility of the controller to manage and execute the elevator's movements and functions effectively.