Gewiss CHORUS GWA9531, Техническое руководство, Страница: 23 / 57

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4.7 Change trigger function
In full automatic mode, the occupancy detector is activated by detection of a movement. In
contrast to full automatic, semi-automatic mode means that switch-on must occur manually.
This takes place via a 1-
bit “1” telegram on the “External influence – Input – Light output”
object.
It is possible to swap between full automatic and semi-automatic modes during operation
using a communication object (Switch-on upon movement
– Input) and/or the remote control
while the detector is unlocked.
Communication object 13, “Switch-on upon movement – Input”, is visible if the parameter
“Change trigger function” is set to “Activation via communication object” or “Activation via
communication object/remote control”. This parameter also covers use of the remote control.
If the parameter setting for the detector is full automatic mode, it can be swapped to semi-
automatic mode and back. A 1-
bit “1” telegram switches the detector to full automatic mode,
and a 1-
bit “0” telegram to semi-automatic mode.
4.8 Dynamic semi-automatic mode/daylight-dependent resetting
In semi-automatic mode, the detector must be manually switched on by an external push
button (via the KNX bus). The detector automatically switches off if for one follow-up time
no movement has been detected or the ambient light is bright enough.
However, natural light often fluctuates considerably, for example because of passing clouds.
If the detector has switched off the light because it is bright enough, it must be reactivated
manually when daylight drops, which, for example could disrupt the working routine in an
office.
By activating the “Daylight-depending resetting” parameter, this behaviour can be
influenced. After the detector has switched off because ambient light is bright enough, the
follow-up time continues to run in the background. So long as there is movement, this time
will keep being restarted. If the follow-up time is still running, and the ambient light falls under
the selected threshold, the detector switches back on automatically if the parameter has
been activated (without the use of an external switch) when movement is detected.
Then, the external push button only has to be used if no movement is detected for an entire
follow-up time, for example if everybody has left the room.