Re: PLC
A PLC(Programmable Logic Controller )is a logic box in an electronic device used for automation of the industrial processes, such as control of machinery on factory assembly lines.Unlike general purpose computers , the PLC is designed for multiple inputs and output arragements , 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 real time system since output results must be produced in response to input conditions within a bounded time , otherwise unintended operation will result.