Automatic switch-off

The switch-off function allows a group or single device to be automatically switched off after a brightness value was dimmed or jumped to and this new brightness value is below a switch-off brightness set in the ETS. A delay can be configured optionally until switching off.

The switch-off function is activated after reaching a constant brightness value, i. e. after a completed dimming procedure through absolute or relative dimming. A new dimming process, which ends below switch-off brightness starts, starts any time delay which may be present. In the same way, the switch-off function is interrupted if the switch-off brightness is exceed during a dimming process.

The automatic switch-off function, for example, not only makes it possible to set the lighting to minimum brightness but to switch off by means of relative dimming as well. A further application, for example, is time-controlled "Good night switch-off" of a dimmed children's room lighting.

Dimming and switching behaviour of the automatic switch-off function

The switch-off function can also be combined with other functions of the gateway. It should be noted that the disabling function, the forced position function and the scene function override the switch-off function. The automatic switch-off can be activated only by a dimming process initiated by the communication objects for dimming (relative or absolute). If the switch-off function is overridden, the gateway terminates the processing of the delay time and the evaluation of the switch-off brightness.

Switching on via the communication object "Switching - Setting" or "Central function... - Switching" does not activate the switch-off function if the switch-on brightness is below the switch-off brightness and the switch-on brightness is jumped to directly. If a soft ON function is configured, the switch-on brightness is dimmed. In this case, the switch-off function is activated as soon as the switch-on brightness has been set to static. To prevent this, configure the switch-on brightness to be greater than the switch-off brightness.

To use the switch-off function, the "Switch-on/switch-off behaviour" parameter must be activated on the parameter page "DALI system... -> Configuration groups -> [x] Group name -> Enabled functions" or "DALI system... -> Configuration single devices -> [x] Device name -> Enabled functions".

Switching off always takes place without soft OFF function, i. e. jumping.

The status objects for the switching state and brightness value are updated by the automatic switch-off function after switching off.

Enabling automatic switch-off function

In the ETS, the automatic switch-off function can be activated separately for each group and single device on the parameter page "DALI system... -> Configuration groups -> [x] Group name -> Switch-on/switch-off behaviour" or "DALI system... -> Configuration single devices -> [x] Device name -> Switch-on/switch-off behaviour".

  • The switch on/off behaviour must be enabled for the group or single device.
  1. Activate the "Automatic switch-off" parameter.
  • The automatic switch-off function has been activated. Additional parameters become visible.

Setting the switch-off brightness

The switch-off brightness must be defined for the switch-off function. The switch-off brightness is set separately for each group and single device on the parameter page "DALI System... -> Configuration groups -> [x] Group name -> Switch-on/switch-off behaviour" or "DALI system... -> Configuration single devices -> [x] Device name -> Switch-on/switch-off behaviour".

  • The switch-on/switch-off behaviour and the switch-off function must be enabled for the group or single device.
  1. Set the parameter "Switch off if brightness value is smaller than" to the required brightness value.
  • As soon as a dimming process causes a value to fall below the configured switch-off brightness and the brightness has been set to constant, the group or single device switches off or alternatively starts the delay until switching off.

The switch-off brightness in the dimmable brightness range must be set between the configured maximum and minimum brightness. Automatic switch-off does not take place if "Switch-off brightness = Minimum brightness" is set, since the switch-off brightness cannot be undershot. The switch-off function is always active if the switch-off brightness is configured to maximum brightness and the maximum brightness is undershot by dimming.

Setting the delay of the switch-off function

A time delay can be activated before the switch-off function switches-off automatically after undershooting the switch-off brightness at the end of a dimming procedure. The time delay can be optionally activated separately for each group and single device on the parameter page "DALI system... -> Configuration groups -> [x] Group name -> Switch-on/switch-off behaviour" or "DALI system... -> Configuration single devices -> [x] Device name -> Switch-on/switch-off behaviour".

  • The switch-on/switch-off behaviour and the switch-off function must be enabled for the group or single device.
  1. Activate the parameter "Delay until switch-off". Configure the parameter "Delay time" to the required time.
  • As soon as a dimming process causes a value to fall below the configured switch-off brightness and the brightness has been set to constant, the gateway triggers the delay time. The group or single device concerned switches off once the delay time has elapsed. The delay time can be re-triggered by further dimming procedures.
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