What is the key PID feature for Basic and Advanced Control?
The value of a key PID feature is increasingly becoming apparent. I got a preview of the importance when I found the 1980s vintage DCS required a fix for override control that was inherently addressed...
View ArticleChecklist for Cascade Control
Cascade control is an effective way of providing better feedback and feedforward control. The peak error in the primary loop can be reduced by more than an order of magnitude for disturbances...
View ArticleHow do you Effectively Use Anti-Reset Windup Options Tips?
Anti-reset windup (ARW) protection is a standard feature of industrial PID controllers. In some DCS, ARW limits are adjustable besides output limits. The ARW limits may not be at their best values....
View ArticleIs it better to have a Controller with More or Less Knobs Tips?
What are the relative merits of different PID structures, a setpoint (SP) filter, and analog output (AO) setpoint rate (velocity) limits? Should I seek a general solution I can use all the time and...
View ArticleChecklist for PID Migration Tips
Older Distributed Control Systems (DCS) and analog controllers tended to have different tuning setting units and methods of implementing integral and derivative action. A lack of understanding of the...
View ArticleA Unified Approach to PID Control Steps 6-11 Tips
A unified approach to tuning has been found that enables a common and simplified method for setting PID tuning parameters. Key features can be used to eliminate the need for retuning to deal with...
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