Siemens SIMATIC S7-1200 Function Manual page 84

Using PID_Compact
4.2 PID_Compact V2
Proportional gain
The value specifies the proportional gain of the controller. PID_Compact does not work with
a negative proportional gain. Control logic is inverted under Basic settings > Controller type.
Integral action time
The integral action time determines the time behavior of the integral action. The integral
action is deactivated with integral action time = 0.0.
Derivative action time
The derivative action time determines the time behavior of the derivative action. Derivative
action is deactivated with derivative action time = 0.0.
Derivative delay coefficient
The derivative delay coefficient delays the effect of the derivative action.
Derivative delay = derivative action time × derivative delay coefficient
● 0.0: Derivative action is effective for one cycle only and therefore almost not effective.
● 0.5: This value has proved useful in practice for controlled systems with one dominant
time constant.
● > 1.0: The greater the coefficient, the longer the effect of the derivative action is delayed.
Proportional action weighting
The proportional action may weaken with changes to the setpoint.
Values from 0.0 to 1.0 are applicable.
● 1.0: Proportional action for setpoint change is fully effective
● 0.0: Proportional action for setpoint change is not effective
The proportional action is always fully effective when the process value is changed.
Derivative action weighting
The derivative action may weaken with changes to the setpoint.
Values from 0.0 to 1.0 are applicable.
● 1.0: Derivative action is fully effective upon setpoint change
● 0.0: Derivative action is not effective upon setpoint change
The derivative action is always fully effective when the process value is changed.
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Function Manual, 03/2017, A5E35300227-AC
PID control