Example Of Heating And Cooling Demand Zones; Send Heartbeat And Receive Timeout - Siemens RDG20 KN Series Basic Documentation

4
Functions
KNX communications (RDG2..KN)

4.12.6 Example of heating and cooling demand zones

Explanation relating to
the illustration
Notes

4.12.7 Send heartbeat and receive timeout

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The building is equipped with Synco controls on the generation side and
RDF../RDU../RDG.. room thermostats on the room side.
In the case of a typical application, the individual RDF../RDG.. room thermostats
send their heat demand to the primary controller (in the above example to the
RMH760).
(1) and (2) designate the numbers of the distribution zone.
●
This type of application can also be applied to refrigeration distribution zones.
●
If no 2-pipe fan coil unit is used, heat and refrigeration demand signals are sent
simultaneously to the primary plant.
In a KNX network, S-Mode and LTE-Mode communication objects can be
exchanged between individual devices. The "Receive timeout "defines the period of
time within which all the communication objects requested from a device is
received at least once. If a communication object is not received within this period,
a predefined value is used.
Similarly, the "Send heartbeat" defines the period of time within which all the
communication objects requested must be transmitted at least once.
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