Programmable Logic Controller

The Programmable Logic Controllers are the industrial digital computers which have been ruggedized as well as adapted for the control of production processes, such as robotic devices, assembly lines or any activity that needs high reliability control as well as ease of programming with process fault diagnosis. These are first industrialized in the automobile manufacturing industry to render flexible, ruggedized and effortlessly programmable controllers to substitute hard-wired relays, sequencers and timers. Programmable Logic Controllers are the example of a "hard" real-time system since output outcomes must be created in response to input conditions.