PLC Automation

A "Programmable Logic Controller" (PLC) or "Programmable Controller" is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly, amusement rides, or lighting fixtures. PLCs are used in many industries and machines. 

Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. 

A PLC is an example of a hard real time system since output results must be produced in