Art. No. SC 1000 KNX
4.2.4.2.5 Venetian blind function
For each rocker or button with the function set to "Venetian blind", the ETS indicates the two 1-
bit objects "Short-time operation" and "Long-time operation".
The status LEDs can be configured independently (see page 161-162).
Operation concept for the Venetian blind function
For the control of Venetian blind, roller shutter, awning or similar drives, the extension module
supports four operation concepts in which the telegrams are transmitted in different time
sequences. The extension module can therefore be used to operate a wide variety of drive
configurations.
The different operation concepts are described in detail in the following chapters.
Figure 78: Operation concept "short – long – short"
Operation concept "short - long – short":
In the operation concept "short – long – short", the extension module shows the following
behaviour:
-
Immediately on pressing the button, the extension module transmits a short time telegram.
Pressing the button stops a running drive and starts time T1 ("time between short time and
long time command"). No other telegram will be transmitted, if the key is released within
T1. This short time serves the purpose of stopping a continuous movement.
The "time between short time and long time command" in the extension module should be
selected shorter than the short time operation of the actuator to prevent a jerky movement
of the blind.
-
If the button is kept depressed longer than T1, the extension module transmits a long time
telegram after the end of T1 for starting up the drive and time T2 ("slat adjusting time") is
started.
-
If the button is released within the slat adjusting time, the extension module sends another
short time telegram. This function is used for adjusting the slats of a blind. The function
permits stopping the slats in any position during their rotation.
The "slat adjusting time" should be chosen as required by the drive for a complete rotation
of the slats. If the "slat adjusting time" is selected longer than the complete running time of
the drive, a push button function is possible as well. This means that the drive is active only
when the button is kept depressed.
-
If the button is kept depressed longer than T2, the extension module transmits no further
telegram. The drive remains on until the end position is reached.
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Software "Smart Control 501511"
Functional description
