Programmable Logic Controller
From Open Source Ecology
Basics
- 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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