ABB i-bus KNX Product Manual page 145

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ABB i-bus KNX
Commissioning
No.
29
This communication object is always enabled and is only required for the lighting groups with the additional function Light
control.
Using this communication object, the daylight calibration for the lighting group is initiated via the communication object
Enable controller calibration (no. 27). The calibration of the lighting group occurs automatically via the DLR/S, if on the
communication object Calibration daylight, a telegram with the value 1 is received.
The daylight calibration is undertaken with natural light. The artificial light from the lighting is switched off. In order to avoid
an undershoot of the set brightness setpoint in the controlled state, the brightness for the daylight calibration in the
reference range should be about 10 % above the brightness for the artificial light calibration.
Telegram value:
The daylight calibration takes about ten seconds. When calibration is completed, the communication object value is reset
to 0. The value is sent on the KNX by setting the T flag. After calibration, light control for the DALI output is activated and
controls.
The DLR/S is taught to recognize the natural lighting levels with daylight calibration. In this way, the DLR/S determines the
relationship between artificial light and daylight which improves the constant light control. The daylight calibration should be
performed without the influence of artificial light. The setpoint brightness is again to be set on the reference point in the
room by the change of shading of the setpoint brightness value. If this is not possible, the factor for daylight calibration can
be assigned via the ETS. This factor can be optimized manually through experimentation by observing the light controller
so that the light controller sets itself to the setpoint brightness.
For further information see:
The sequence of daylight and artificial light calibration is not random. Calibration with artificial light must be performed
before calibration with daylight.
Function
Calibration daylight
1 = Triggering of daylight calibration
0 = No effect
Performing daylight
Object name
DALI output
calibration, page 180
DLR/S 8.16.1M | 2CDC 507 100 D0202 143
Data type Flags
1 bit C, W
DPT 1.003