Temperature Controller - Staveb AG

Parameter Functions and Definitions 5-35Note 2: In this state, the measurement point is within the ST stable range.Note 3: In this state, the change width of the PV every 60 seconds is at the STstable range or less.New PID constants are not calculated by self-tuning (ST) for the currentlyconfigured set point in the following instances:• When the PID constants have been changed manually with ST set toON.• When auto-tuning (AT) has been executed.. αConditions of Use: Control must be configured for 2-PID control method,and the ST parameter must be set to OFF.Function: This parameter allows you to configure the 2-PID constant foralpha (α). Normally, use this parameter at its default.Table 5.AK AlphaConfigurable Range Units Default Value0.00…1.00 None 0.65Related Parameters• PID/ON/OFF (Initial Setting function group) (p. 5-22)• ST (Initial Setting function group) (p. 5-23)MV (Manipulated Variable) Upper Limit,MV (Manipulated Variable) Lower LimitConditions of Use: The control method must be 2-PID control, and the STparameter must be set to OFF.Function: The MV Upper Limit and MV Lower Limit parameters allow youto configure the upper and lower limits allowed for the manipulated variable. Ifthe current manipulated variable calculated by the Bulletin 900-TC32 exceedsyour configured MV upper or lower limit value, then the current valuePublication 900-UM003C-EN-E - January 2004