MDT SCN-DTSEN1.01 Technical Manual page 12

Technical Manual
Twilight-/Temperature Sensor KNX [SCN-DTSEN1.01]
Day/Night object
Object for blinds
control
Delay after change
to „Day"
Delay after change
to „Night"
Table 6: Settings – Twilight sensor
Send measured value
By setting "not active, only on request", the measured value is not actively sent, but can be
queried externally via object. "on change" means that the measured value is actively sent on the
bus on a change. The value at which change is to be sent is defined with the setting under "Send on
change of ...". The "cyclic" setting can be used to set the intervals at which the current measured
value is to be sent. It is also sent if the value has not changed.
With the selection "on change and cyclic", both settings are reacted to accordingly.
Day/Night switchover / Blinds control
With the activation of the "Day/Night switchover", further settings can subsequently be made. "Day
if greater than" determines the threshold above which the unit switches to "Day" mode. "Night if
less than" determines the threshold below which the unit switches to "Night" mode.
After a switchover, the unit remains in the corresponding operating mode until the other threshold
is undercut or exceeded.
Furthermore, the current status can be sent cyclically to the bus when activated.
Day/Night object
When activated, a separate communication object appears and the polarity can be set at the same
time via the parameter. The current status of "Day/Night" is sent to the bus via the object.
Object for blinds control
With activation of the function, it is possible to send delayed telegrams after Day/Night switchover
via a separate object. On the one hand, a delay for starting an upward movement can be set when
switching to "Day" and a delay for a downward movement can be set when switching to "Night".
If the setting is "no function", no telegram is sent.
A "1" on the "Lock object: Blinds Up/Down" locks the function, a "0" removes the lock.
Important: When changing to "Day" a "0" is always sent, when changing to "Night" a "0" is always
sent. This can also be used, for example, to switch the outdoor lighting On/Off.
The following table shows the available communication objects:
Number Name/Object function
5 Twilight –Send measured value
6 Twilight – Switchover Day/Night
7 Twilight – Blinds Up/Down
8 Twilight –
Lock object: Blinds Up/Down
Table 7: Communication objects – Twilight sensor
MDT technologies GmbH • 51766 Engelskirchen • Papiermühle 1 • Germany
12
Phone: +49-2263-880 • knx@mdt.de • www.mdt.de
• not active
• Day=1 Night=0
Day=0 Night=1
•
• not active
• active
no function
1min – 60min
no function
1min – 60min
Length
2 Byte
1 Bit
1 Bit
1 Bit
Activation and setting of the polarity of
the Day/Night object.
Activates the movement function of
the blinds/shutter depending on
Day/Night.
Setting whether and with what time a
drive-up should be started after
switching to "Day".
Setting whether and with what time a
downward movement is to be started
after switching to "Night".
Usage
Sending the current measured value
For switchover between Day and Night
operation. Polarity according to parameter.
Moving object for the blind/shutter
Locking the up/down movement