Temperature Controller - Staveb AG

Configuration and Basic Operation 3-25Table 3.F When I (Integral Time) is AdjustedWhen I isincreasedSetPointPVIt takes a long time for the process valueto reach the set point. It takes time toachieve a stable state, however there islittle overshoot/undershoot and hunting.When I isdecreasedSetPointOvershoot/undershoot and hunting occur,and the curve rises quickly.PVTable 3.G When D (Derivative Time) is AdjustedWhen D isincreasedSetPointPVOvershoot/undershoot and stable timeare reduced, however, fine hunting occurson changes in the curve it self.When D isdecreasedSetPointPVOvershoot/undershoot increase, and ittakes time for the process value to reachthe set point.Alarm OutputsAlarm TypesA single alarm can be used on Bulletin 900-TC32 controllers that support thisfunction. See Table 1.A.The controller alarm output conditions are determined by the combination ofthe selected Alarm Type, Alarm Value, Alarm Hysteresis, and Set Pointparameters.Configure the Alarm Type in the Alarm 1 Type parameter (Initial Settingfunction group). Note: The default is 2: upper-limit alarm (deviation).Alarm output operation is based on 11 pre-defined Alarm Type conditionsusing the Set Value number. Table 3.H describes the Alarm Type, Alarm Value,Upper-Limit Alarm, and Lower-Limit Alarm parameters.Publication 900-UM003C-EN-E - January 2004