
109/140
Siemens
RXB (KNX) Applications library
CLC and RAD description of functions for CC-02 CM110384en_03
Building Technologies
General / central functions
28 Feb 2009
10.13 Alarm
Alarming works differently in S-mode and LTE mode.
RXB controller support different alarms:
•
PPS2 fault
If the connection to the room unit is faulty at the room
controller (via PPS2 interface), the information is
transmitted with this alarm message.
•
Room temp. sensor
error
Sensor interruption or short.
No valid room temperature.
•
Room air condensation Risk of condensation if temperature drops below
dewpoint temperature.
10.13.1 S-mode
In S-mode, the above alarms are summarized and provided as
common alarm
.
The alarm message is mapped to the following S-mode output communication object:
Common alarm (output communication object)
Flags
R W C T U
Type Send
heartbeat
States
1 0 1 1 0 1.005
DPT_Alarm
Yes
0 = No alarm
1 = Alarm
As soon as the cause of the alarm ceases to exist, the alarm message disappears.
In addition, the output
Alarm info
provides detailed information:
Alarm info (output communication object)
Flags
R W C T U
Type Send
heartbeat
Info
1 0 1 1 0 219.001
DPT_AlarmInfo
Yes
See Konnex specification
The
Alarm info
output can be enabled or disabled via another communication object
(this also affects the LTE mode fault signal):
Enable alarm info (input communication object)
Flags
R W C T U
Type Receive
timeout
States
0 1 1 0 0 1.003
DPT_Enable
Yes
(fixed 42 hours)
0 = Disabled / Off
1 = Enabled / On
KNX
R
CO
Note