Siemens Desigo RXB Technical Manual page 393

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Answer for S-mode:
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Siemens
Building Technologies
With master/slave configurations, why do the QAX34 room units not always show the
same temperature values ?
The master-controller and slave-controller data is synchronized at regular intervals.
If a value changes just after synchronization, it may differ for a few minutes until it is
resynchronized.
Why does the slave window contact/presence detector contact have no effect?
For the window/presence detector contact, the slave can only be integrated via the
CFC. Suitable compounds are available in the library: [WndStaDtr] and [OcStaDtr].
For one slave controller:
Create group addresses for the window/presence detector contact and add the
communication object of the master and slave.
For one or multiple slave controllers :
In CFC with the compounds [WndStaDtr] and [OcStaDtr]..
Why do the ACS plant graphics not always display all values (e.g. room operating
mode)?
The controller is configured as a slave. These values are not available with slave
controllers.
Why doesn't the ACS Operator Book show the current data?
After a change of application (e.g. from FNC12 to FNC18) you first need to update the
reference data points.
Why doesn't the ACS Operator Book show the current data?
After a change of application (e.g. from FNC12 to FNC18) you first need to update the
reference data points.
Why doesn't an RXB controller transmit S-Mode communication objects that it has
received?
RXB controller do not work as bus relays .
If a communication object is required, the binding must be to the source, not to the RXB
controller.
Example: an RXB controller receives the room temperature from a bus sensor.
A bus display is used to display the room temperature.
The display must get the signal directly from the bus sensor.
RXB (KNX) application library
FAQs
FNC Description of functions for FC-10, FC-11, FC-12
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CM110385en_05
28 Feb 2009