ABB i-bus KNX Product Manual page 182

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ABB i-bus KNX
Planning and application
Performing daylight calibration, automatically
Daylight calibration must be performed for each lighting group, where the additional function Light control
is enabled. Light control is only possible for lighting groups 1...8.
Implementation using ETS is described in the following.
Important
The sequence of daylight and artificial light calibration is not random. Calibration with artificial light must
be performed before calibration with daylight.
The daylight calibration can be performed automatically by the DALI Light Controller or experimentally by
the commissioner. The required setting can be made in
with the parameter Calculate factor for daylight compensation automatically. Automatic calibration is
preferred.
For automatic daylight calibration, the artificial light must be switched off and the light control deactivated.
The same brightness level (setpoint) as artificial light can generally be created using shading units. In
order to prevent, with a high level of certainty, the setpoint from being undershot in the controlled state, a
brightness value can be set for the daylight brightness, which is about 10 % above the brightness value of
the artificial brightness calibration.
Using the communication object Enable controller calibration (no. 27), set the readiness to receive the
communication object Calibration daylight (no. 29). The calibration can now be performed using a telegram
with value 1 sent to the communication object Calibration daylight. The DALI Light Controller performs the
calibration and determines the levels (weighting) of artificial light and daylight. After this calibration, the
DALI Light Controller switches to the setpoint and commences light control.
If a shading device is not available for use or the daylight is not sufficient to set the desired brightness, a
manual daylight calibration cannot be undertaken.
180 2CDC 507 100 D0202 | DLR/S 8.16.1M
Parameter window - Gx Light controller, page 99,