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L-DALI User Manual
342
LOYTEC
Version 5.2
LOYTEC electronics GmbH
Ambient Mode
The AMBIENT mode is used if effect lighting (e.g. lights in a shop window, facade
lighting, floor lights etc.) has to be switched on or off depending on a measured light level.
Lights are switched to the value specified in the proprietary property
Occupied_Level
(property ID 542) when the lux level is below
Setpoint
and to the unoccupied level (see
Section 8.3.5.7) when lux level is higher than
Setpoint.
Updater Mode
The UPDATER mode has to be selected when a DALI light/occupancy sensor with constant
light controller functionality is installed on the DALI network. In this mode no light level
computation is performed. The controller simply forwards the parameters to the DALI
constant light controller and retrieves lamp setting from the DALI light sensor.
In general, LOYTEC does not recommend using UPDATER mode. Wherever possible use
REGULATOR or CONTROL mode instead and use DALI sensors only as lux level and
occupancy information source via the corresponding sensor objects. These modes allow
improved influence of the constant light controller’s parameters via the fieldbus side.
8.3.5.3 Prioritized Control
Manual override of the constant light controller can be accomplished in two ways:
Using the priority array of the controlled lamp actuator Analog Output object using a
higher priority than the constant light controller.
When internal CLC bindings are used to control DALI groups an override can also be
performed using a DALI push-button device controlling the same groups as the
constant light controller (see Section 8.3.5.8).
8.3.5.4 Controlling Multiple Light Bands
The L-DALI constant light controller allows controlling two light bands (groups). The
primary light band (Light Band 1) is near the inside of the building, the secondary light
band (Light Band 2) is near the window front. Depending on the outdoor light intensity the
primary light band has to be brighter than the secondary light band to illuminate the room
evenly.
The primary light band is controlled by the
Present_Value
property of the Loop object.
Further for both light bands internal bindings to local DALI groups and their corresponding
Analog Output objects can be done (see Section 5.3.2).
The maximum difference between the two light bands can be configured via the
configuration property
Lamp_2_Offset
as shown in Figure 232. The configuration property
Lamp_2_Limit
defines the light level above which the output values of light band 1 and 2
are identical.