ABB i-bus KNX Product Manual page 172

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ABB i-bus KNX
Planning and application
Calibration artificial light
Calibration daylight
Light control active/inactive
Master/slave operation
170 2CDC507128D0202 | DLR/A 4.8.1.1
With artificial lighting calibration, the DALI Light Controller determines the internal actual
value, which results with the required setpoint value (control parameter) if artificial lighting
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 so
that they are also used during lighting control.
During the artificial lighting 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 characteristic 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 lighting control. Calibration can take up to 90 seconds if the
brightness values fluctuate.
Artificial lighting calibration must always be undertaken.
For further information see: Constant lighting
The sequence of daylight and artificial lighting 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 lighting
The sequence of daylight and artificial lighting calibration is not random. Calibration with
artificial light must be performed before calibration with daylight.
The user can interrupt Light control via the relevant parameterization at any time using
normal operational telegrams, e.g. Dim, Switch or Recall scene, to manually operate the
lighting according to requirements. Here, the DALI Light Controller is in standby mode, and
light control is reactivated e.g. by an ON telegram with the value 1 to communication
object Switch.
The actual deactivation of the light control is implemented via the communication object
Activate function controller. Lighting control is deactivated/stopped. It is possible to control
the lighting group completely normally via switch or dim telegrams. Telegrams are
implemented without light control being started. Light control is only restarted if on
communication object Activate function controller a telegram with the value 1 is received.
Whether the light control of a lighting group is activated can be detected via the
communication object Activate fct 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 168, on DALI and 1-10 V luminaires.
control, page 167
control, page 167
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Switch/Dim Actuators or Universal Dimmers.