For internal use only
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Siemens
KNX bus communications
CE1P3127en
Building Technologies
Appendix
2013-04-08
9 Appendix
9.1
Faults and errors
Various events cause faults and errors which then trigger error messages. This
document deals only with communication errors (see also the tables on the next
page).
Type of error
Examples
Failure
No bus power supply.
System time failure.
Setting errors
More than 1 system time master defined.
More than 1 room master defined in the same
"geographical zone".
Address error (e.g. two bus devices with the same device
address).
Device errors such as sensor errors, faults in the extension module, or plant faults
such as fan overload, burner fault, dirty filters, frost conditions etc. are described in
the basic documentation.
9.1.1
Fault status message bus
All fault status messages are distributed over the KNX bus. In this process, the
fault with the highest priority or, in the case of equal priority, the oldest fault, can be
displayed on the "Fault status signal bus" operating page (access via Service
level).
Main menu > Faults > Fault status message bus
Fault status message bus
Dev addr: 0.2.5
>1 identical geogr zone [1]
Fault no.: 5402
05.06.2003 17:46
The "Fault status message bus" operating page can be selected at all access
levels.
The operating lines on the "Faults" operating page, namely "Faults current" and
"Fault history" relate to the faults associated with that controller (i.e. not to faults
from other devices transmitted over the KNX bus).
The faults are arranged in order of priority. However, "Fault 1" (the "Fault 1" line
displayed on the RMZ790 and RMZ791 operator units or the "Fault 1" menu line in
the ACS menu tree) and the highest-priority fault are not necessarily identical.
Communication error.
Notes
