ABB i-bus KNX Product Manual page 179

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ABB i-bus KNX
Planning and application
As an example, short operating instructions for lighting group 1 are listed for automatic daylight calibration:
0.
1.
2.
3.
4.
5.
6.
Undertaking daylight calibration manually
If a daylight calibration is not possible, for example, because the setpoint is not reached with the available
daylight or a shading option is not available to darken the brightness level so that the setpoint can be set,
manual daylight calibration must be undertaken. This occurs with a factor for daylight compensation that
appears in the parameter window Gx Light controller if in parameter Compensation factor for daylight
calibration automatically is parameterized with no, see
A factor between 0 and 99 can be entered. This factor defines the relationship between daylight and
artificial lighting.
A larger value compensates more for daylight. A smaller value on the other hand gives a higher weighting
to artificial lighting. After the factor has been transferred for download in the DALI Light Controller, the
lighting control has to be compared using the brightness measured in the detection range of the light
controller by the lux meter. If the required setpoint is still too low, more artificial lighting is still required. This
is achieved by increasing the factor.
Too much artificial lighting is provided should the desired setpoint be exceeded. A reduction of the artificial
lighting can be achieved by a reduction of the compensation factor. As an example in the following, short
operating instructions for a lighting group are listed for manual daylight calibration:
The calibration should be performed at two different measurement points within the room. In this way, the
influence of the daylight compensation factor can be observed in conjunction with the brightness at
different measurement points.
Configuration
Calibration artificial light
Deactivating light control.
Switch off artificial lighting.
Set the setpoint brightness, e.g.
500 lx with daylight.
Switch calibration
communication object to ready to
receive.
Initiate daylight calibration.
End of daylight calibration.
Automatic daylight calibration
By
see Performing artificial lighting
calibration , page 174
Send the value 0 to communication
object Activate fct controller/status (No.
31).
Send the value 0 to communication
object Switch (No. 30).
The same setpoint can be set using
blinds or time of day as with artificial
lighting calibration.
Note: In order to prevent with a high
level of certainty that the setpoint is not
undershot in the controlled state, set a
brightness about 10 % above the
brightness value of artificial brightness
calibration.
Send a telegram to communication
object Enable controller calibration (No.
27) with the number of the controller
group.
Send a telegram with the value 1 to the
communication object Calibration
daylight (No. 29).
Automatic through DALI Light
Controller.
Parameter window - Gx Light
Effect
Lighting characteristic is stored in the
DALI Light Controller.
Light control is deactivated.
Artificial lighting switched off.
Setpoint is set, e.g. 500 lx. Optional
manual calibration possible.
Communication objects Calibration
artificial lighting and Calibration
daylight are ready to receive for 1
hour or until calibration has been
completed.
Light controller commences daylight
calibration. Calibration has ended
after about 5 seconds.
Light control active and controlling.
controller, page 95.
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