ABB i-bus KNX Product Manual page 176

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ABB i-bus KNX
Planning and application
Calibration artificial light
Calibration daylight
Light control active/inactive
Master/slave operation
174 2CDC 507 100 D0202 | DLR/S 8.16.1M
With the artificial light calibration, the DALI Light Controller determines the internal actual
value which results with the required setpoint (control parameter) if artificial light is
switched on exclusively. The artificial light calibration should be undertaken without the
influence of daylight. During calibration, all light sources (including slaves) should be set
as they would also be used during light control.
During the artificial light calibration, the DALI Light Controller automatically determines the
characteristic curve of the lighting and detects the technical lighting properties of the room.
During the calibration, the DALI Light Controller automatically progresses through the
brightness characteristic from maximum to minimum brightness. In this way, the brightness
properties of the room, the operating point and the associated parameters for light control
are determined. If the brightness curve has been run through and the control parameters
have been automatically set, the DALI Light Controller switches to the setpoint brightness
and starts light control. The calibration may take up to 90 seconds depending on the
deviations in brightness during calibration.
Artificial lighting calibration must always be undertaken.
For further information see: Constant light
The sequence of daylight and artificial light calibration is not random. Calibration with
artificial light must be performed before calibration with daylight.
During daylight calibration, the DALI Light Controller determines the different influences of
artificial lighting and natural incidence of light on the light sensor and determines a
compensation factor. The daylight calibration should be performed without the influence of
artificial lighting. This should be set by the change of shading of the setpoint brightness
value on the reference point in the room.
If the setpoint brightness value cannot be set with natural brightness, a daylight
compensation factor can be defined using the ETS. By observing the control behavior of
this factor, it should be optimized empirically, so that the light control is set as exactly as
possible to the setpoint brightness level.
For further information see: Constant light
The sequence of daylight and artificial light calibration is not random. Calibration with
artificial light must be performed before calibration with daylight.
At any time, the user can operate the light controller with appropriate parameterization
using normal dimming telegrams, e.g. interrupt dimming, switching or scene recall, in order
to operate the lighting manually according to their requirements. The DALI Light Controller
is in standby mode here and recommences light control via an ON command, e.g. via a
telegram with the value 1 on the communication object Switch.
The actual deactivation of the light controller is implemented via the communication object
Function Activate controller. Lighting control is stopped. It is now possible to control the
lighting group normally via switching or dimming telegrams. Telegrams are implemented
without light control being started. Light control is only restarted if a telegram with the value
1 is received on the communication object Function Activate controller.
Whether the light control of a lighting group is activated can be detected via the
communication object Fct Activate controller/Status or via bit 12 of the communication
object Diagnostics (no. 6).
It is possible that, with one lighting group of the DALI Light Controller, other lighting groups
can also be controlled. It is possible that the controller lighting group (master) controls the
other lighting groups (slaves) either directly internally in the DALI Light Controller or
externally via the communication object Brightness value of slave. The external slaves
can, for example, be ABB i-bus
Please refer to Note, page 172, on DALI and 1-10 V lighting equipment.
control, page 171
control, page 171
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Switch/Dim Actuators or Universal Dimmers.