Despatch MIC1422 Controller User Manual

Page 65

SECTION 13: RaPID FEATURE

13.1 RaPID Description

The RaPID (Response assisted PID) range of controllers have been designed with a
unique "fuzzy" logic algorithm which dramatically reduces overshoot and improves
settling times on start-up, setpoint changes and disturbances by 70%, without
complicating set-up and usage.

The fuzzy logic based algorithm enhances the traditional PID function, continuously
reblending the P, I and D control building blocks on line. Instead of learning from an
event and reacting after it has happened (which is how all self-tuning PID controllers
work, ) the RaPID controllers can react as an event occurs, thereby improving the
quality of control and speed of response in any application.

To access the RaPID Mode, access the Setup Mode. Press the SCROLL key until rAP
is displayed.

To engage the RaPID feature, press the UP key. The AT light will turn green. To
disengage the RaPID feature, access the RaPID Mode, and press the DOWN key. The
AT light will turn off.

To return to Control Mode, press the SCROLL key until CtrL is displayed, then press
the DOWN key.

For a detailed description of the RaPID feature, refer to Appendix C.

NOTE: If either Pb1 or Pb2 is zero, the RaPID feature cannot be engaged.