ABB i-bus FCC/S 1 1 Series Product Manual page 177

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ABB i-bus KNX
Parameters
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7.5.1.6.1.2.4.5 Dependent Parameter
Max. control value
Options:
The maximum control value from the PI controller specifies the maximum value that the controller
outputs. If a maximum value below 255 is selected, then this value is not exceeded even if the con-
troller calculates a higher control value.
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7.5.1.6.1.2.4.6 Dependent Parameter
Min. control value (basic load)
Options:
The minimum control value from the PI controller specifies the minimum value that the controller
outputs. If a minimum value greater than zero is selected, then this value is not dropped below
even if the controller calculates a lower control value.
This parameter is used to set a basic load, e.g. for the operation of floor heating. Even if the con-
troller calculates the control value zero, heating medium flows through the floor heating to prevent
the floor from cooling down completely.
In the Temperature controller parameter window it can be set whether this basic load is to be ac-
tive permanently or is to be switched via the Basic load group object. In addition, it can be set here
whether the basic load is also to be active if the controller is switched off.
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7.5.1.6.1.2.4.7 Dependent Parameter
Activate temperature limitation
Options:
A controller limit temperature can be activated using this parameter. Using the limit temperature,
the controller's control value for this stage can be set to 0 on reaching a parameterized tempera-
ture. In this way, exceeding (heating) or dropping below (cooling) this temperature can be pre-
vented.
An example of the usage of the limit temperature is floor heating, where exceeding a specific tem-
perature must be prevented to protect the material of the floor.
• No: The limit temperature is deactivated.
• Yes: The limit temperature is activated. The following dependent parameters are also dis-
played.
0...100
0...100
No
Yes
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 177