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 Setpoint calculation 2013-06-17
In a building automation and control system, the central setpoint shift can be influenced
via the following S-mode communication objects (triplets):
Setpoint shift for heating (Input communication object)
Setpoint shift for cooling (Input communication object)
Flags
Type Receive timeout States
R
W
C
T
U
0 1 1 0 0 222.101
DPT_TempRoomSetp
SetShiftF16[3]
yes
3 floating point values
– Comfort (K)
– Precomfort (K)
– Economy (K)
In LTE-mode, the central setpoint shift is transmitted via the following communication
objects (triplets):
Setpoint shift for heating (Input)
Setpoint shift for cooling (Input)
Possible partner
function blocks
Known partner devices
TempRoomSetpSetHeatShift
TempRoomSetpSetCoolShift
115 HVACOPT
HVAC Optimizer
Siemens:
Synco RMB795
Geographical zone
6.5 Local setpoint shift
If setpoints are shifted locally and corrected by the controller, local shift is applied.
Two methods are available for local setpoint shift:
– Using a series QAX... room unit (local PPS bus) providing a rotary button or rocker
switch to adjust the room temperature setpoint
– or via KNX bus.
If multiple sources command local setpoint shift, "last one wins" applies.
The S-mode communication object is used for setpoint shift via the EIB/KNX bus:
Setpoint offset (input communication object)
Flags
Type Receive timeout Value
R
W
C
T
U
0 1 1 0 0 9.002
DPT_Value_Tempd
No Floating point (K)
The following communication object is used in LTE-mode:
Setpoint offset (input)
Possible partner
function blocks)
Known partner devices
TempRoomSetpUserOffset
384 UHRS
User HVAC
Room settings
Siemens:
Synco QAW740
Geographical zone
CO
CO