ABB i-bus KNX Product Manual page 102


ABB i-bus KNX
Commissioning
Actual control value (input) only for
more than one light sensor
Options:
If multiple Light Sensors are assigned to a lighting group, the actual value for the constant light control is
determined with this parameter. The lowest value, the highest value or the average value of the detected
sensor values can be used for light control. If only a single Light Sensor is assigned to an output, the
current sensor value is used as the actual value irrespective of the setting.

Smallest sensor value: The DLR/S uses the lowest sensor value of the assigned Light Sensors as its
actual value for constant light control. All those Light Sensors are considered that are assigned to the
output (control circuit). With this setting, the room is lit up most brightly by constant light control. The
setpoint should not be undershot in normal, malfunction free operation, e.g. when there are no
reflections or no direct incidence of light on the Light Sensor.

Average sensor value: The DLR/S uses the linear average value of the assigned Light Sensors as its
actual value for constant light control.

Largest sensor value: The DLR/S uses the highest sensor value of the assigned Light Sensors as its
actual value for constant light control. This setting ensures that constant light control requires the least
possible level of artificial light. This achieves the largest possible conservation of energy. However,
the brightness at many locations in the room is very likely below the target brightness level.
Upper control limit during
lighting control
Options:
This parameter defines the maximum brightness value which the lighting group of the DLR/S can use
during light control.
The control limits are independent of the dim and value limits that are parameterized in the
window Gx
Lower control limit during
lighting control
Options:
This parameter defines the minimum brightness value, which the lighting group of the light controller, can
use during light control.
100 2CDC 507 100 D0202 | DLR/S 8.16.1M
Smallest sensor value
Average sensor value
Largest sensor value
100 % (255)
99 % (252)
...
51 % (130)
50 % (128)
Group, page 67.
50 % (128)
49 % (125)
...
20 % (51)
...
1 % (3)
0.3 % (1)
Parameter