Send Heartbeat And Receive Timeout; Digital Inputs - Siemens Desigo RXB Technical Manual

S-Mode
LTE and S-mode
HandyTool
Digital input
Input 1
Input 2
Note
102/140
Siemens
Building Technologies
10.1

Send heartbeat and Receive timeout

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 communication objects of a device must be received at least once. If a
communication object is not received within this period, a predefined value is used and
an error message generated. This ensures that interruptions in communication are
identified at an early stage.
Similarly, send heartbeat defines the period of time within which all requested
communication objects 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
*127 Send heartbeat
10.2

Digital inputs

The following potential-free contacts can be connected to digital inputs D1 and D2:
• Presence detector or window contact (see section 5 ).
• Dewpoint sensor (see section 8.2.5).
Function
Not used by the
application
(Free input, contact can be used freely (see page 111).
Occupancy
Window
Dewpoint
Do not connect the same type of sensor / functions to both digital inputs.
The controller would ignore the second input.
RXB (KNX) Applications library
General / central functions
Range
0 ... 105 min
0 ... 105 min
(0 = not enabled)
31 min
15 min
Contact action
Free: Bus = 1 = Contact closed
Free: Bus = 1 = Contact open
Occupied = Contact closed
Occupied = Contact open
Window open = Contact open
Window open = Contact closed
Dewpoint = Contact closed
Dewpoint = Contact open
CLC and RAD description of functions for CC-02 CM110384en_03
Resolution
5 min
5 min
Basic setting
60 min
45 min
HandyTool
*113
*114
0 = Default
28 Feb 2009
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