Gewiss CHORUS GWA9531, Техническое руководство, Страница: 35 / 57

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5.2 Delayed switch-on
Depending on the usage of an HVAC channel, it can be useful to switch on the devices
connected to it, such as HVAC equipment, with a time delay. The “Activation time” parameter
is used to define whether the channel is switched on directly when movement is detected,
or after a delay. If a delayed reaction is desired, this parameter must be set to “Observation
time”. In this case, other parameters become visible, which allow definition of the switch-on
delay time (Number of observation windows, Observation time in seconds/minutes).
Up to 20 observation windows can be defined per HVAC channel. The duration defined
under the “Observation time in seconds” and “Observation time in minutes” parameters
applies to all windows (1-60 seconds and 0-60 minutes). At least one movement must be
detected in each window to allow the channel to switch on.
Example: Three observation windows each with an observation time of 10 seconds.
After the first detected movement (A), the detector starts window 1. If no movement is
detected within its duration of 10 seconds, evaluation is terminated. If at least one movement
is detected (B), after the first window’s time has elapsed (C), the second observation window
is started. Here too, evaluation is terminated if no movement is detected within the duration
of the window. If at least one movement is detected (D), the third window is started (E). If
more than three windows are set in the parameters, this is repeated for the total number of
observation windows. The detector switches on as soon as the last window has detected its
first movement (F). So in this example, this will result in a delay time of 21-30 seconds
(depending on when the last movement is detected). If there is no movement in a window,
all windows are reset.
The observation time ensures that there is movement for the defined duration before the
connected load is switched on. In this way, sources of interference can partly be filtered
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