A brief introduction to the controller

A controller refers to a master command device that controls the starting, speed regulation, braking, and reverse of an electric motor by changing the wiring of the main circuit or control circuit and changing the resistance value in the circuit in a predetermined order. Composed of program counters, instruction registers, instruction decoders, timing generators, and operation controllers, it is the "decision-making body" that issues commands, that is, it completes the coordination and command of the entire computer system's operations.