125/166
Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12 CM110385en_05
Building Technologies
General and central functions
28 Feb 2009
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
Range
Resolution
Receive timeout
60 min
0 ... 105 min
5 min
Send heartbeat
45 min
0 ... 105 min
5 min
(0 = Not enabled)
Fixed times are specified, as follows:
– Receive timeout:
31 min
– Send heartbeat:
15 min
HandyTool
Parameter
Short name
Basic setting
*128
Receive timeout
60 min
*127
Send heartbeat
45 min
S-mode
LTE mode and S-mode