ABB i-bus KNX Product Manual page 85

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ABB i-bus KNX
Parameters
—
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 controller calculates
a higher control value.
—
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 controller
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 active
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.
—
Dependent parameter
Activate temperature limitation
Options:
A controller temperature limitation can be activated using this parameter. Using the temperature limitation,
the controller's control value for this stage can be set to 0 on reaching a parameterized temperature.
In this way, exceeding (heating) or dropping below (cooling) this temperature can be prevented.
An example of the usage of the temperature limitation is floor heating, where exceeding a specific
temperature must be prevented to protect the material of the floor.
•
no: The temperature limitation is deactivated.
•
yes: The temperature limitation is activated. The following dependent parameters are also displayed.
0...100 %
0...100 %
No
Yes
VC/S 4.x.1 | 2CDC508220D0211 Rev. A 83