Follow us on:

2016 01 Olsen Emerson Implement an effective loop tuning strategy

PID stands for Proportional, Integral, Derivative. Controllers are designed to eliminate the need for continuous operator attention. The set-point is where you would like the measurement to be. Error is defined as the difference between setpoint and measurement. (error) = (set-point) – (measurement) The variable being adjusted is called the

manipulated variable which usually is equal to the output of the controller. The output of PID controllers will change in response to a change in measurement or set-point.
Manufacturers of PID controllers use different names to identify the three modes. These equations show the relationships:
P Proportional Band = 100/gain
I Integral = 1/reset (units of time)
D Derivative = rate = pre-act (units of time)
In the following paper you will see how to tune a PID loop and see its relation in the other loops.

 

Share this on:
Twitter
LinkedIn
UreaKnowHow

UreaKnowHow.com is an independent group of nitrogen fertilizer specialists with an impressive number of years experience in designing, maintaining and operating nitrogen fertilizer plants.

Solution Providers offer their solutions to improve our member’s plants performance.