Temperature Controller - Staveb AG

3-24 Configuration and Basic Operation4. Select Integral Time by pressing the M key.Figure 3.465. Press the U or D key to set the Integral Time parameter to 250.Figure 3.47Integratedtime6. Select Derivative Time by pressing the M key.Figure 3.487. Press the U or D key to set the Derivative Time parameter to 45.Figure 3.49Derivativetime8. To return to the Operation function group, press the key.Note: The newly configured value or parameter is loaded into controllermemory if you do not operate any key on the front panel for at least 2 secondsor by pressing the or M key.Note: When PID values I (integral time) and D (derivative time) are set to 0,control is executed according to proportional operation and the default setpoint becomes the center value of the proportional band. In this case, a relatedparameter is Manual Reset Value (Adjustment function group)The following diagrams provide a basic explanation of how adjusting the P, I,and D parameter values impact system operation.Table 3.E When P (Proportional Band) is AdjustedWhen P isincreasedSetPointPVThe curve rises gradually, and a longstable time is achieved, preventingovershoot.When P isdecreasedSetPointPVOvershoot and hunting occur, howeverthe set point is quickly reached afterwhich the curve stabilizes.Publication 900-UM003C-EN-E - January 2004