Chapter 5 Relay Ladder Logic Programming 122
-
Three types of PID controller:
Proportional loop (P);
Integral loop (I);
Differential loop (D);
(PID controller diagram)
Proportional controller
According to the difference (or error) EV between the target value and measuring value, this alters the adjustable
value (or variables) ΔPI proportionally, then change the output (result) PI of the program control. Proportion
controller can work promptly, but it can’t make the difference to 0. The feature of the proportion controller:
Correspond to the change (or variation) of the process value instantly.
PDF compression, OCR, web optimization using a watermarked evaluation copy of CVISION PDFCompressor
To Next Page
Loading...
