Art. No. SC 1000 KNX
Figure 64: Editing mode for setting the date
(The date is set in the same way)
The date and time can - in addition to the editing function in the administration area - also be set
via the KNX communication objects "D.Input Time" (KNX DPT 10.001) and "D.Input Date" (KNX
DPT 11.001). The device handles dates and times via the bus or locally on the device equally.
The last presetting sets the system clock.
Setting the date and time via the communication objects is appropriate when there is a master
clock in the KNX system that is controlled by a time standard (DCF77- or IP-synchronisation).
Cyclical transfer of date and time based on the master clock ensures that all devices in the KNX
system, as well as the Smart Control, work synchronously.
The parameter "External clock available" in the parameter branch "Display" defines whether bus
synchronisation of date and time is possible. If the setting is "Yes", the communication objects
as described are available which make bus synchronisation possible. In this case, the
changeover from summer to winter time is also controlled externally.
If the setting is "No", the objects for date and time are not available. The internal system clock of
the device then works autonomously and can only be set via the administrator area locally on
the device. In this case, a summertime/wintertime changeover by manually setting the time
locally on the device might also have to take place if required.
If there is an external KNX clock, the Smart Control can transmit a 1-bit telegram requesting a
time synchronisation after a device reset (ETS programming or switching on the power supply).
The object "Request time" with which the request object of the KNX system clock can optionally
be activated is available for this purpose. If the existing KNX clock supports this function, it
sends back a time telegram to the device as a response to the request, which ensures that a
valid time is set immediately after a device reset.
i The Smart Control cannot work as a master clock. It can only receive date and time
telegrams.
Page 133 of 347
Software "Smart Control 501511"
Functional description
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