FCU_PID

The FCU_PID component is a regulator with proportional, integral and derivative actions.

The FCU_PID component

The FCU_PID component has the following slots:

Enable: enables or disables the component–if the component is disabled (the Enable slot is set to false), the Out slot is set to 0;
Analog Output Enable: the binary input slot with the information about control type;
- Available settings: true, false;

True: sets the analog control. The component uses available actions:

proportional with gain equal to the value of Kp slot;
integral, according to the constant set in the Ki slot;
derivative, according to the constant set in the Kd slot.

False: sets the binary control. The component works using only proportional gain. In this type of control, the proportional gain is set in the Gain For Relay Outputs slot.

Cv: the controlled value;
Sp: allows to set the setpoint for the controlled value;
Out: the output slot of the component;
Gain For Relay Outputs: allows to set the gain used to calculate the Out slot if the component controls binary outputs (the Analog Output Enable slot is set to false);
Kp: allows to set the value of the proportional gain constant;
Ki: allows to set the value of the integral constant (setting to 0 disables the integral action);
Kd: allows to set the value of the derivate constant (setting to 0 disables the derivate action);
Max: allows to set the maximum value of the output of component;
Min: allows to set the minimum value of the output of component;
Bias: allows to set the bias value–this value is added to the Out slot if Ti slot is set to 0;
Max Delta: allows to set the maximum amount the Out slot can change by in the exTime (setting to 0 disables this function);
Direct: allows to set the acting process;
- Available settings: true (direct-acting process), false (reverse acting process);
Ex Time: allows to set the period of loop execution;
Tstat Enable: enables/disables the Tstat function;
Tstat Diff: allows to set the differential value for the Tstat function;

Note: The Tstat function allows to reset the integral action if the absolute value of the difference between the Cv slot and Sp slot is lower than the value from the Tstat Diff slot. In this case, the sum of error (used for calculating the integral gain) is set to 0.

Pgain: allows to set the value of the output signal, which was calculated by the proportional action;
Igain: allows to set the value of the output signal, which was calculated by the integral action;
Dgain: allows to set the value of the output signal, which was calculated by the derivate action.