ABB i-bus FCC/S 1 1 Series Product Manual page 212

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ABB i-bus KNX
Parameters
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7.5.1.9.1.2.2 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.
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7.5.1.9.1.2.3 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.
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7.5.1.9.1.2.4 Dependent Parameter
Use control value for fan automation
This parameter is only visible if the Free configuration option has been selected for the Additional-
stage cooling parameter in the Application parameters parameter window.
Options:
This parameter can be used to specify whether the control value for this stage is also to be used
as the control value for the fan automation.
• No: The control value is not used for the fan automation
• Yes: The control value is used for the fan automation. If this stage is active and the fan is in the
automatic mode, the control value is also used as a control value to actuate the fan.
If the related stage has a free configuration, the device does not know whether the stage actu-
ated is a fan coil unit or not. However, because the fan automation only makes sense for the fan
coil unit stages, an assignment must be made here.
If a free configuration is selected for all 4 control stages and none of the stages is also parame-
terized for fan automation, the fan automation remains without function.
01.0...01.5...10.0
0...100...255
No
Yes
Note
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 212