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Siemens
RXB (KNX) Applications library
CLC and RAD description of functions for CC-02 CM110384en_03
Building Technologies
Setpoint calculation
28 Feb 2009
•
Comfort:
– The Comfort setpoints for heating and cooling are shifted in parallel
A
.
– The original spacing heating – cooling is maintained.
The room controller corrects the setpoints as follows following a local shift:
•
Precomfort
::
– The values are shifted in parallel to the
Comfort
values
B
.
– The cooling setpoint cannot be lowered following central shift
C
.
– The heating setpoint cannot be increased following central shift
C
.
•
Economy
:
– The cooling setpoint cannot be lowered following central shift
C
.
– The heating setpoint cannot be increased following central shift
C
.
– The value is shifted together with the
Precomfort
value
D
.
•
Protection
:
–
Protection
values are absolute
E
.
– A minimum spacing between
Comfort
heating and
Comfort
cooling of 0.5 K is
maintained
F
.
Setpoints
Protection
cooling
Economy
cooling
Precomfort
cooling
Comfort
cooling
Comfort
heating
Precomfort
heating
Economy
heating
Protection
heating
10
38
5D
108
Sp [°C]
Offset [K]
A
0
+
-
0.5 K
0.5 K
B
C
D
F
E
C
D
F
Local setpoint shift
Upon a change from
Comfort
and
Precomfort
to
Economy
or
Protection
, the setpoint
shift can be reset (see page 110).
The
Effective setpoint offset
(last value of local shift via PPS2 / bus) is available in the
following S-mode communication object:
Effective setpoint offset (output communication object)
Flags
R W C T U
Type Send
heartbeat
Value
1 0 1 1 0 9.002
DPT_Value_Tempd
Yes
Floating point (K)
Function
Internal correction by
controller
Note
KNX
R
CO
