Re: [foxboro] Any suggested parameter settings for using PIDA with theSample Ready feature for composition control?




Neil,

In sample mode, a controller only updates the output when there is a new
measurement (true with "continuous" measurements as well). That's the
advantage of sample mode. It prevents wind-up between samples. That doesn't
mean there's no integral action.

The best thing to do is use the analyzer control to set an intermediate
controller that does have a continuous measurement, like a tray temperature
for distillation control.

Jerry Hidahl

 
 
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