Programmable logic controller: Difference between revisions

Revision as of 22:46, 25 February 2004

Revision as of 22:23, 26 February 2004

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== PID loops ==

PLCs may include logic for single-variable generic industrial feedback loop, a ";proportional, integral, derivative" loop, or "[[PID controller]]."

A PID loop is the standard solution to many industrial control processes that require proportional control. Proportional control dictates that large deviations should be corrected by large amounts and small deviations should be corrected by small amounts. A PID loop could be used to control the pH level of water in a swimming pool.