ABB i-bus KNX Product Manual page 122

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ABB i-bus KNX
Parameters
7.6.9.1.2.2 —
Dependent parameter
P-proportion
Options:
The standard value depends on the option selected in the Additional-stage cooling parameter in the
Application parameters parameter window.
The P-proportion stands for the proportional range in a control. It fluctuates around the setpoint and in a PI
control is used to change the speed of the control. The smaller the value set, the faster the control reacts.
However, the value should not be set too small because otherwise there may be a risk of overshoot.
7.6.9.1.2.3 —
Dependent parameter
I-proportion
Options:
The standard value depends on the option selected in the Additional-stage cooling parameter in the
Application parameters parameter window.
The I-proportion stands for the integral time in a control. The integral proportion causes the room
temperature to approach the setpoint slowly and also to reach it finally. Depending on the system type
used, the integral time may need to have different values. In principle the following applies: The more
sluggish the overall system, the larger the integral time is.
7.6.9.1.2.4 —
Dependent parameter
Extended settings
Options:
Extended settings can be enabled using this parameter. This parameter is displayed on the selection of
the Yes option.
120 2CDC508220D0211 Rev. A | VC/S 4.x.1
01.0...01.5...10.0 K
0...100...255 min
No
Yes