72/140
Siemens
RXB (KNX) Applications library
CLC and RAD description of functions for CC-02 CM110384en_03
Building Technologies
Setpoint calculation
28 Feb 2009
In a building automation and control system, the central setpoint shift can be controlled
via the following S-mode communication objects (triplets):
Setpoint shift heating (input communication object)
Setpoint shift cooling (input communication object)
Flags
R W C T U
Type Receive
timeout
States
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 heating (input)
Setpoint shift cooling (input)
Possible
partner
function blocks)
Known partner devices
TempRoomSetpSetHeatShift
TempRoomSetpSetCoolShift
Geographical zone
115 HVACOPT
HVAC Optimizer
Siemens:
Synco RMB795
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 EIB/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
R W C T U
Type Receive
timeout
Value
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
Geographical zone
384 UHRS
User HVAC
Room settings
Siemens:
Synco QAW740
KNX
R
CO
KNX
R
CO
