The constant lighting control application ensures seamless control of artificial light based on room brightness. Brightness of additional lighting groups is individually calculated using the calculated brightness of the controlled main lighting group and illumination fall-up characteristics, considered from the window to inside the room. Each lighting group is individually controlled in the room which additionally lowers energy demand for lighting.

A brightness sensor mounted on the ceiling in a room acquires the brightness in the room as a sum total of artificial light and daylight. The previously defined brightness value of the lighting group is maintained at a constant level. Artificial light is switched off if not needed.

When adding presence detectors, lighting is controlled based on daylight and occupancy.

Multiple lighting groups control in the room:

Influence of daylight and artificial light

The parameters luminance, correction factor daylight, and correction factor artificial light must be determined by the corresponding brightness measurement in the room and saved to the automation station to ensure that daylight-dependent lighting in the room is operating properly.

The room occupancy has the following commands available to manually operate lighting:

  • Switch-on
  • Switch off
  • Dimming up
  • Dimming down

Manual operation using the presence button

The presence button is used to establish occupancy in a room. It is used in place of a presence detector. Establishing occupancy with a presence button is not automatic, but rather the result of a user action. When entering the room, the user switches to "occupied" using a presence button. When exiting the room, the user switches to "absent" using the presence button.

Manual operation overrides automatic

Manual operation by the user can override any existing automation in the room. Any manual operation must be released to return to automatic mode.

DXR2 applications have the following methods to this end:

  • A central scheduler program
  • Presence detector detecting non-occupancy
  • Central commands from the management platform
  • By manual operation (first-time switch on or appropriately configured button)

Description

Name

Default value

Enable brightness control by switch-on command

0:No
1:Yes

EnBrgtCtlSwiOn

1:Yes

Burn-in function

Each lighting application function possesses a burn-in function for newly installed fluorescent lights that must be burned in. This ensures that the lights achieve their maximum brightness and life expectancy:

  • T5 fluorescent lamps require a burn-in time of 100 hours.
  • T8 fluorescent lamps require a burn-in time of 20 hours.

Refer to manufacturer data on fluorescent lights for more detailed information.

You cannot dim fluorescent lights during the burn-in period. You can switch off fluorescent lights during the burn-in period.

The burn-in function ensures that newly installed fluorescent lights are not dimmed during the required burn-in period, either by a control algorithm or manual dimming. The minimum actual value for the lighting output is set to the minimum burn-in value. As a result, the user can only switch on or switched on to the minimum burn-in value connected lighting during the burn-in period.

As soon as the hours of operation counter reaches the required number of hours for burn in, the minimum value of the output lighting (BACnet Property Minimal Actual Value) is set to the value OpMinVal; the maximum value of the output lighting (BACnet Property Maximal Actual Value) is set to the value OpMaxVal.

Description

Name

Default value

Burn-in operating hours

OphBrnin

00:00:00 [hh:mm:ss]

Burn-in minimum value

BrninMinVal

100 [%]

Operating phase minimum value

OpMinVal

0.5 [%]

Operating phase maximum value

OpMaxVal

100 [%]

Prewarning during switch off

Each lighting application has a prewarning function. When enabled, the prewarning function does not immediately turn off lighting when the push button is manually pushed. The light blinks in advance for a defined period. The room user can permanently turn on the light again by pressing the button during the prewarning function.

Description

Name

Default value

Prewarning function

0:Disable
1:Enable

PreWarnFnct

0:Disable

Prewarning time

TiPreWarn

60 [s]

Runtime totalizer

Each lighting application has an operating hours counter. It indicates the time the light was switched on since the last time the counter was reset. Always manually reset the counter if exchanging luminaires. You can reset the counter via central operation or on the DXR2 web server.

Description

Name

Default value

Operating hours

Oph

00:00:00 [hh:mm:ss]

Control of state LED

The DXR2 can control KNX PL-Link push buttons or room operator units with integrated LED state displays. The following state displays can be configured:

  • Always off:
  • State LEDs are always switched off on push buttons/room operator unit.
  • Lighting on:
  • The state LEDs for the push buttons (switch off/darker) are switched on if the lights are switched on.
  • Lighting off:
  • The state LEDs for the push buttons (switch on/brighter) are switched on if the lights are switched off.
  • Manual operation lock:
  • All state LEDs are switched on if the push buttons/room operator unit is locked for manual operation.
  • Lighting on, or manual operation lock:
  • The state LEDs of the push buttons (switch off/darker) are switched on if the lights are switched on and all state LEDs are switched on if manual operation is locked.
  • Lighting off, or manual operation lock:
  • The state LEDs of the push buttons (switch on/brighter) are switched on if the lights are switched off and all state LEDs are switched on if manual operation is locked.

Description

Name

Default value

Room operator unit, LED indication

RuLED

Lighting off, or manual operation lock