Master Control - Berker

4.2.4.1.3 Date and time
The panel possesses an integrated real time clock (RTC). This clock is used both to display the
current time and date but also to control the timer switch channels or the presence simulation.
The time and date functionality of the panel is configured using the parameters in the "Date /
Time" parameter group in the top parameter node of the ETS plug-in.
The time and date display can be set using the "Display format ..." parameters. For the date,
there are the options of specifying the year with two or four digits and selecting the sequence
day-month-year or month-day-year.
In most cases, within a KNX/EIB system, a device is sufficient which transmits the current time
and date at regular intervals, so that all the other devices can synchronise themselves as required.
If possible a device should be used which has high accuracy through the reception of
the DCF 77 time signal.
The integrated real time clock of the panel can be set by such an external clock. The parameter
"Comparison with external clock" specifies whether the time and / or date are to be synchronised.
Then, if necessary, the two communication objects "Master date" and "Master time" are
created. In addition, the panel can used the 1 bit communication object "Request date / time", in
order to synchronise itself. This communication object transmits - if enabled in the parameters -
a request telegram after each device initialisation and then regularly once a day at 4:00 a.m.
The telegram polarity can be configured in the ETS plug-in.
If there is no opportunity for external bus synchronisation, then the panel can transmit the date
and time to the bus once a day, once an hour or once per minute (depending on the parameters)
into order to synchronise other KNX/EIB devices. The values are transmitted using the objects
"Date object" and "Time object". In this case, the transmission behaviour is defined by the
"Send date" and "Send time" parameters.
A distinction should be made between the following settings...
- "Do not transmit" setting: the panel does not automatically transmit the date and/or time to
the bus. In such cases, there is no synchronisation of external bus subscribers.
- "Transmit cyclically" setting: the panel transmits the date and/or time to the bus cyclically.
The parameters "Cycle time for date transmission" and "Cycle time for time transmission"
define the regularity of transmission.
- "Transmit on request" setting: in this configuration, there is an additional 1 bit communication
object with the name "Request date / time through external device" available. When
the panel receives a switching telegram from another KNX/EIB bus subscriber via this object,
it evaluates the telegram as a request and transmits the current date and its own time
to the bus as a response. The telegram polarity of the external data and time request can
be configured in the ETS..
- "Transmit cyclically and on request" setting: this setting is a combination of the two single
configurations described above.
i It is possible to use the panel request (parameters "Request date / time" synchronisation
through "MasterDate" and "MasterTime" objects) and, in 'parallel' the external request of
other bus subscribers (parameter "Send date / time = On request..."). The functions are not
mutually incompatible.
For example, the panel can receive the date and time from a KNX/EIB master clock and
also synchronise other external bus subscribers.
i The "Date object" and "Time object" objects can be read out independently of cyclical
transmission or any time by a poll (set "Read" flag).
The data point types "Date" (11,001) and "Time" (10,001) do not contain any information about
whether summer time or normal time (winter time) is active. For this reason, the "Automatic time
setting" parameter can specify in which form the panel carries out the change from summer to
winter time and vice-versa.
Order-No. 7574 00 1X
Software "...590101"
Functional description
Page 43 of 222