19/46
Siemens
Heating controllers RVP201 and RVP211
CE1P2464en
Building Technologies
3 Technical design
2017-07-21
2
46
4B
0
3
E
H
T
Vw
T
Rw
+10 K
-10 K
I
+20 K
-20 K
L
T
Rx
1
/
2
1
s
0 °C
s
0
0
-
×
×
×
Generation of setpoint with room temperature-compensated control
× Multiplier
s
Slope of heating curve
E
Authority (gain factor) of room temperature deviation
T
Rw
Room temperature setpoint
H Heating
curve
T
Rx
Room temperature
I
Integrator with limitation
T
Vw
Flow temperature setpoint
L Limiter
3.3.6 Control
Prerequisites for this type of control
Outside sensor connected
No room unit connected,
or
Room authority set to 0 % or to Off if a room unit is connected
The compensating variable used for weather-compensated control is the composite
outside temperature. Assignment of the flow temperature setpoint to the compensating
variable is made via the selected heating curve. The room temperature is not taken into
consideration. This type of control is used primarily in plants or buildings where
several rooms are occupied at the same time
no room is suited as a reference room for the room temperature
Prerequisites for this type of control:
Room unit connected
No outside sensor connected, or
Room authority set to 100 % if an outside sensor is connected
If no outside sensor is connected, the setting potentiometer for the room authority is
inactive.
The compensating variable used for room temperature-compensated control is the
setpoint / actual value deviation of the room temperature. The room authority is gener-
ated based on this deviation. Also, an outside temperature of 0 °C is assumed and
taken into account when generating the setpoint.
When there is no temperature deviation in the room, the controller maintains the flow
temperature setpoint resulting from
0 °C outside temperature, and
the selected heating curve slope
Any room temperature deviation produces an instant parallel displacement of the se-
lected heating curve. The correlation between the extent of temperature deviation and
the degree of displacement is defined by the room authority, which is dependent on
the setpoint / actual value deviation of the room temperature
the selected heating curve slope
The purpose of room influence is to enable the controller to exactly reach and maintain
the respective setpoint.
Weather-compensated
control
Room temperature-
compensated control
