ABB i-bus KNX Product Manual page 141

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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/A, 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 lighting source is switched off by the lighting. 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 minutes. When the 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, the light control for the DALI output is
activated and controlled.
The DLR/A is thought to recognize the natural lighting levels with daylight calibration. In this way, the DLR/A determines
the relationship between artificial lighting and daylight which improves the constant lighting control. The daylight calibration
should be performed without the influence of artificial lighting. 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 daylight calibration
factor can be assigned via the ETS. This factor can be optimized by experiment by observing the light controller so that the
light control is set to the setpoint brightness.
For further information see:
The sequence of daylight and artificial lighting 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
daylight calibration, page 176
Object name
DALI output
DLR/A 4.8.1.1 | 2CDC507128D0202 139
Data type Flags
1 bit C, W
DPT 1.003