Temperature Controller - Staveb AG

Configuration and Basic Operation 3-19The result of a controller AT (auto-tuning) cycle can be viewed/monitored inthe Proportional Band (P), Integral Time (I), and Derivative Time (D)parameters in the Adjustment function group.Figure 3.30Adjustment function groupProportional bandDerivative timeIntegrated timeAT Description and Display ConsiderationsAT (auto-tuning) is started when you configure the AT Execute/Cancelparameter to ON. During execution of AT, the No. 1 display for the ATExecute/Cancel parameter blinks (see Figure 3.31). When AT ends, the ATExecute/Cancel parameter turns OFF, and the No. 1 display stops blinking.Figure 3.31AT execute/cancelDuring AT executionNo. 1 displayIf you move to the Operation function group during AT execution, the No. 2display blinks to indicate that AT is being executed.Figure 3.32PV/SPDuring AT executionNo. 2 displayNote: Only the Communications Writing, RUN/STOP, and ATExecute/Cancel parameters can be changed during AT execution. Otherparameters cannot be changed.Publication 900-UM003C-EN-E - January 2004