ABB i-bus KNX Product Manual page 183


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 Controller if, in the parameter Calculate factor for daylight
compensation automatically using daylight calibration is parameterized with No, see
Gx Light
A factor between 0 and 99 can be entered. This factor defines the relationship between daylight and
artificial light.
If the general conditions have not changed, but the compensation factor has, the following applies:
A greater compensation factor increases the artificial light, because the daylight component is weighted
less in the constant light calculation. A smaller compensation factor reduces the artificial light, because the
daylight component is weighted more in the constant light calculation.
After the factor has been transferred to the DALI light controller via a download, light control should be
compared with the brightness measured in the detection range of the light controller as measured by a
luxmeter. If the required setpoint is still too low, more artificial light is still required. This is achieved by
increasing the compensation factor.
If the desired setpoint is exceeded, then there is too much artificial light. A reduction of the artificial light
can be achieved by a reduction of the compensation factor. As an example in the following section, short
operating instructions for a lighting group are listed for manual daylight calibration:
Ideally, 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.
Version
Artificial light calibration
Deactivate 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.
controller, page 99.
Automatic daylight calibration
By
See Performing artificial light
calibration, page 178
Send the value 0 to communication
object Fct Activate 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 value 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.
Effect
The 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 light 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.
Parameter window -
DLR/S 8.16.1M | 2CDC 507 100 D0202 181