Programmable logic controller: Difference between revisions

Revision as of 20:34, 16 May 2003

Revision as of 19:26, 19 May 2003

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A '''programmable logic controller''' or '''PLC''' is ana small [[computer]] designedused tofor replace a bulky cabinet full[[automation]] of relayreal-world logic.processes, such Whereas automated systems would use hundreds or thousandscontrol of relays,machinery aon singlefactory PLCassembly can be programmed as a replacementlines.

PLCs often replace bulky cabinets full of electro-mechanical relay logic. Where older automated systems would use hundreds or thousands of relays, a single PLC can be programmed as a replacement.

The program in a PLC responds to inputs with customized outputs. A simple program could maintain the level of water