Send Heartbeat And Receive Timeout; Startup; Heating And Cooling Demand - Siemens RDF301 Basic Documentation

LTE Mode / S-Mode
Reducing the bus load
Startup response
Startup delay
Heating output primary
Heating output
secondary
Cooling output primary
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Building Technologies

3.11.5 Send heartbeat and receive timeout

3.11.5
In a KNX network, In a KNX network, S-Mode and LTE Mode communication objects can be exchanged
between individual devices. The between individual devices. The Receive timeout defines the period of time within
which all the communication objects requested from a device must have been which all the communication objects requested from a device must have been which all the communication objects requested from a device must have been
received at least once. If a communication object is not received within this period, a received at least once. If a communication object is not received within this period, a received at least once. If a communication object is not received within this period, a
predefined value is used. predefined value is used.
Similarly, the Send heartbeat defines the period of time within which all the commu Similarly, the
nication objects requested must be transmitted at least once. nication objects requested must be transmitted at least once. nication objects requested must be transmitted at least once.
Fixed times are specified as follows: Fixed times are specified as follows:
– Receive timeout: Receive timeout: 31 minutes
– Send heartbeat: Send heartbeat: 15 minutes
Object [KNX obj. Nr.] Object [KNX obj. Nr.]
Room operating mode: Room operating mode:
Time switch [12] Time switch [12]
Room operating mode: Room operating mode:
Preselection [7] Preselection [7]
Application mode [31] Application mode [31]
Individual zones can also be disabled ( Individual zones can also be disabled (out of service) via control parameter if they
are not being used. are not being used. In disabled zones, the LTE signal will no
sent, and will will therefore reduce bus load.

3.11.6 Startup

3.11.6
The application is restarted after every reset, so that all the connected motorized The application is restarted after every reset, so tha
valve actuators are synchronized (see section 3.7). valve actuators are synchronized
After a reset, it takes up to 5 minutes for all the connected room After a reset, it takes up to 5 minutes for all t
restart. This is designed to avoid overloading the mains power supply when restart. This is designed to avoid overloading the mains power supply when restart. This is designed to avoid overloading the mains power supply when
restarting. At the same time, it reduces the load on the KNX network, as not all restarting. At the same time, it reduces the load on the KNX network, as not all restarting. At the same time, it reduces the load on the KNX network, as not all
thermostats transmit data at the same time. The delay (T thermostat
the thermostat thermostat's device address. After the delay, the device starts to send.

3.11.7 Heating and cooling demand

3.11.7
In conjunction with Synco conjunction with Synco, the heating and/or cooling demand from each room is
transmitted to the BACS to provide the required heating or cooling energy. transmitted to the
An example for LTE Mode is described in section 3.11.4. An example for
In S-Mode Mode, the current state signals of the control outputs are available
RDF301, RDF301.50..., RDF600KN RDF301, RDF301.50..., RDF600KN, RDF600KN/S
communication objects can be exchanged
fines the period of time within which all the commu-
I/O Minutes
Receive 31
Receive 31
Receive 31
ut of service) via control parameter if they
he LTE signal will no longer be periodically
he connected room thermostats to
the heating and/or cooling demand from each room is
to provide the required heating or cooling energy.
signals of the control outputs are available.
Basic Documentation
defines the period of time within
Default value
Comfort
Auto
Auto
t all the connected motorized
) is determined by
WaitDevice WaitDevice
the device starts to send.
ocumentation CE1P3171en
2017-12-07