ABB i-bus FCC/S 1 1 Series Product Manual page 139

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ABB i-bus KNX
Parameters
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7.4.1.2.1.1.14.4 Dependent Parameter
Weighting of external measurement 2
This parameter is only visible if in the Number of temperature input objects parameter, the 2 option
has been selected.
Options:
This value specifies the weighting with which the external measurement 2 is to flow into the calcu-
lation of the actual temperature.
If the sum of the total weighting values is greater than 100 %, the ratio of the values is formed and
the result then scaled back to 100 %.
Example 1:
Value 1 = 20 %
Value 2 = 80 %
Value 2 is taken into account with four times the weighting of value 1.
Expressed in figures:
Value 1: 20 °C; weighting 20 %
Value 2: 25 °C; weighting 80 %
((20 °C × 0.2) + (25 °C × 0.8)) / (0.8 + 0.2) = 24 °C
Example 2:
3 values: If 50 % is entered as the weighting for all three values, all values have the same weight-
ing and a mean value is simply formed from the three values.
Example 3:
2 values: The weighting 80 % applies to value 1 and the weighting 40 % to value 2, value 1 is
therefore taken into account in the calculation with twice the weighting of value 2.
Expressed in figures:
Value 1: 21 °C; weighting 80 %
Value 2: 24 °C; weighting 40 %
((21 °C × 0.8) + (24 °C × 0.4)) / (0.8 + 0.4) = 22 °C
If only the external measurement is used and the value 0 % selected as the weighting for both
measurements, the value received as external temperature 1 is always used as the valid temper-
ature value.
7.4.1.2.1.2 Selection of actuator device
The following parameters are visible if the Actuator device option has been selected in the Device
function parameter.
0...100
Note
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 139