ABB i-bus KNX Product Manual page 100


ABB i-bus KNX
Commissioning
Compensation factor for daylight
calibration automatically
Options:
With this parameter the factor for the daylight compensation can be entered manually in the ETS. This
factor considers the evaluation of the artificial lighting and the natural incidence of light using the Light
Sensor. Generally this factor is determined automatically by the DLR/A during the daylight calibration, refer
to Commissioning/calibration of the constant lighting

This should be selected if no daylight calibration is to be performed, e.g. the natural brightness is not
sufficient or no shading possibilities are available to set the setpoint during daylight. The following
parameters appear:

yes: This setting is the recommended parameterization. The factor for daylight compensation is
determined automatically by the DLR/A during the daylight calibration, refer to
Commissioning/calibration of the constant lighting
98 2CDC507128D0202 | DLR/A 4.8.1.1
no
yes
Factor for daylight compensation
in % [0...99]
0...35...99
Options:
A larger value compensates more for natural light. This means that artificial light has a higher
weighting, which also means that more artificial light is added, and that the light is switched off later
as a result. The room will remain brighter than the setpoint brightness.
A smaller value compensates less for natural light. This means that artificial light has a lower
weighting and that less artificial light is added. The setpoint value tends to be slightly undershot,
and the artificial light is switched off earlier.
In practical usage it has been shown that – depending on the ambient conditions – a factor of
between 30 and 50 generally provides the best results in most cases.
Restore factor for daylight
compensation after download
Options: no
yes
This parameter defines if the factor for daylight compensation is overwritten with the value from the
ETS.

yes: With a download, the value stored in the DLR/A for daylight compensation is overwritten
with the value set in the ETS.

no: The factor is not overwritten during download. This is useful, for example, if you want to
avoid that the values that have been determined over the course of many attempts in the
DLR/A are not overwritten by mistake, and that a renewed calibration is required.
control, page 173.
control, page 173.