Condenser control using P- or PI-control
If the condenser control type is set to “P-control” (Proportional control), this control will allow some deviation from the reference, because it is just a P-controller with a P-band allowing a difference between the reference and the controlled value where the size of the difference is depending on the output. P-control is fast but not precise, whereas PI-control (Proportional Integration control) is precise. With PI-control the integration function will, so to speak, integrate the fault away.
The Control Type can be set in the controller. Below it is shown how the control type is changed from P-band control to PI-control using the AK-PT 50 PC software: