ABB i-bus FCC/S 1 1 Series Product Manual page 183

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ABB i-bus KNX
Parameters
Example 2:
Temperature difference from basic-stage heating: 2 K
Setpoint temperature: 23 °C
Actual temperature: 22 °C
Additional stage is inactive as long as the actual temperature is above 21 °C.
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7.5.1.7.1.1.2 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 heating 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.
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7.5.1.7.1.1.3 Dependent Parameter
Extended settings
Options:
Extended settings can be enabled using this parameter. This parameter is displayed on the selec-
tion of the Yes option.
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7.5.1.7.1.1.3.1 Dependent Parameter
Hysteresis
Options:
This parameter is used to specify the hysteresis that is to apply to the setpoint to prevent continu-
ous switching of the controller.
• Upper switching point = setpoint + hysteresis
• Lower switching point = setpoint – hysteresis
No
Yes
Note
No
Yes
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FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 183