Operating Instructions

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Siemens RXB (KNX) application library RXB Description of functions for FC-10, FC-11, FC-12, FC-13 CM110385en_08
Building Technologies General and central functions 2013-06-17
The heating or cooling demand can be evaluated via the following S-mode
communication object.
Energy demand room (Output communication object)
Flags
Type Send heartbeat Value
R
W
C
T
U
1 0 1 1 0 6.001
DPT_Percent_V8
yes
100...100% : (-128...+127)
100% = Full heat
+100% = Full cool
In LTE mode the energy demand is determined by two signals:
Heating coil energy demand (Output)
Possible partner function blocks
Known partner devices
EnergyDemAH
154 AHDTTU
Air Heater Energy Demand
Transformer TU
Siemens:
Synco RMH760
RMU710 / 20 / 30
RMB795 / RMS705
Distr. zone, heating
Cooling coil energy demand (Output)
Possible partner function blocks
Known partner devices
EnergyDemAC
217 ACDTTU
Air Cooler Energy Demand
Transformer TU
Siemens:
Synco RMU710 / 20 / 30
RMB795 / RMS705
Distr.zone, cooling
FNC18 generates an additional energy demand signal for the heating surface:
Energy demand heating surface (Output)
Possible partner function blocks
Known partner devices
EnergyDemRD
153 RHDTTU
Radiator Energy Demand
Transformer TU
Siemens:
Synco RMH760
RMU710 / 20 / 30
RMB795 / RMS705
Distr zone, heating
The energy demand is independent of the changeover signal!
11.6 Heating/cooling signal output
The heating/cooling status display is mapped to a building automation and control
system via the following S-mode communication object (applies to States 1, 3, 20):
Effective application mode (Output communication object)
Flags
Type Send heartbeat States
R
W
C
T
U
1 0 1 1 0 20.105
DPT_HVACContrMode
yes
1 = Heat
3 = Cool
20 = No demand
CO
Note
CO