ZIEHL-ABEGG Ucontrol PXDM35A - Controller Configuration (Controller Type) and Controller Action

Handbook Ucontrol type-lines PXDM Date 06/04
TBL02_55-GB06/04 Part.-No. 00153239-GB
Page 79 / 105
Mode
Contorller type KP component / % KI component/ % KD component/ % TI component/ %
1.01
Speed controller = no control function
2.01.. P 50 50 50 3
3.01.. P 50 50 50 3
4.01 . PID 50 50 50 3
5.01.. PID 50 50 50 3
6.01.. PID 50 50 50 3
Factoy setting, depending on selected
Mode
9.9 Controler configuration (controller type) and controller action )
The controller configuration is automatically carried out during selection of the application related mode of operation. The
factory presets in accordance with the mode of operation are based on many years of experience, which is suitable for
many applications. Under special circumstances, these can be individually adapted.
The
type of control determines the method with which the controlled value behaves in case of a difference between the
target and current values. For this, the control technology has standard algorithms, which consist of a combination of
three methods:
Selection P, PID
P control (Proportional component, proportion of the absolute deviation)
I control (Integral component, proportion of the sum of all deviations))
D control (Differential component, proportion of the last difference)
If needed, the most suitable combination for the respective control system can be
determined from these proportions.
With pure P controllers (controller type P), the following described settings do not
have any function!
P-component = reaction time
Setting range 0-200 %
smaller = more slowly
bigger = faster
I-component = accuracy,
correction time
Setting range 0-200 %
smaller = faster
bigger = more slowly
D-component = stability by
slower
correction time
Setting ragne 0-200 %
smaller = faster
bigger = more slowly
Integration time = correction time
Setting range 0-200 %
smaller = faster
bigger = more slowly
Experimental values:
During temperature regulation or condensing pressure control with sluggish control systems with many delays, a pure P-
controller is most suitable. This diminishes the control precision.
In air velocity control or pressure control for air conditioning with a fast control system and quick reaction times, PID
control is most suitable. The regulation precision is highest in this type of control.
In some cases, in which a sluggish control system is present but a precise target value regulation is necessary, a PI
variant (0 % for KD) can be the solution.
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