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Siemens
RXB (KNX) application library
FNC Description of functions for FC-10, FC-11, FC-12 CM110385en_05
Building Technologies
FAQs
28 Feb 2009
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.
Æ
The display must get the signal directly from the bus sensor.
Question:
Answer:
Question:
Answer for LTE mode:
Answer for S-mode:
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