Send Heartbeat And Receive Timeouts - Siemens Desigo RXB Technical Manual

S-mode
LTE mode and S-mode
HandyTool
Siemens
Building Technologies
11.1

Send heartbeat and receive timeouts

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 must have been received
at least once. If a communication object is not received within this period, a predefined
value is used and an error message is generated. This ensures that interruptions in
communication are identified at an early stage.
Similarly, the Send heartbeat defines the period of time within which all the
communication objects requested must be transmitted at least once.
The time intervals are based on the size of the network. Normally the basic setting can
be retained. In the case of S-mode communication objects, shorter times may be
selected for smaller networks or for test purposes. The Receive timeout must always be
longer than the Send heartbeat.
Parameter Basic setting
Receive timeout 60 min
Send heartbeat
45 min
Fixed times are specified, as follows:
– Receive timeout:
– Send heartbeat:
Parameter Short name
*128 Receive timeout
Send heartbeat
*127
RXB (KNX) application library
General and central functions
Range
0 ... 105 min
0 ... 105 min
(0 = Not enabled)
31 min
15 min
FNC Description of functions for FC-10, FC-11, FC-12
Resolution
5 min
5 min
Basic setting
60 min
45 min
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