Programmable logic controller: Difference between revisions

Revision as of 10:56, 31 July 2002

Revision as of 10:56, 31 July 2002

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=== PID Loops ===

PLCs often also include logic for single-variable generic industrial feedback loop, a "proportional, integral, dervativederivative" loop, or "[[PID loop]]." A PID loop is the standard solution to many industrial control processes that require proportional control. The basic idea is that the controller reads a sensor. Then it subtracts the read value from a "setpoint" to determine an "error".

The error is then treated in three different ways: