Programmable Logic Controller

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  • Often abbreviated as PLC
  • A Digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or light fixtures
  • 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-up or non-volatile memory.
  • A PLC is an example of a hard real time system since output results must be produced in response to input conditions within a limited time, otherwise unintended operation will result.

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