CE1P2522E / 30.03.2000
Basic Documentation RVL470
Siemens Building Technologies
44/68
Function block "Service functions and general settings"
Landis & Staefa Division
13.2.2. Heating curve
The display shows the current heating curve which is composed of the following vari-
ables:
•
Basic setting of the little bar or on operating lines 14 and 15
•
Position of the setting knob for room temperature readjustments
•
Parallel displacement (setting on operating line 72)
•
The display also shows the two flow temperature setpoints:
•
TV1: current setpoint at an outside temperature of +15 °C
•
TV2: current setpoint at an outside temperature of –5 °C
With demand-compensated control (plant types 4, 5 and 6), the display shows --- ---.
Display of heating curve data:
Knob on
controller
TV1, TV2
Operating line 166
1 + s
Parallel displacement of
heating curve, operating line 72
1 + s
25
22
B
1
1
e
T
V
T
AM
Heating curve
TV2
S
TV1
S
+15 °C
-5 °C
TV1
S,
TV2
S
TV1
,
TV2
s
Slope
TV1
Resulting flow temperature setpoint at an outside temperature of +15 °C
TV2
Resulting flow temperature setpoint at an outside temperature of –5 °C
TV.
S
Flow temperature setpoint (generated via the heating curve)
13.3. Commissioning aids
13.3.1. Simulation of outside temperature
To facilitate commissioning and fault tracing, outside temperatures in the range of
–50 to +50 °C can be simulated. This simulation has an effect on the actual, the com-
posite and the attenuated outside temperature.
Simulated T
A
= actual T
A
= composite T
A
= attenuated T
A
During the simulation, the actual outside temperature (as acquired by the sensor or via
LPB) will be overridden.
When the simulation is terminated, the actual temperature will gradually adjust the com-
posite and the attenuated temperatures to their real values.
This simulation of the outside temperature causes therefore a reset of the composite
and the attenuated outside temperatures.
There are three choices to terminate the simulation:
•
Entry of --.-
•
Leaving the setting level by pressing the Info or any of the operating mode buttons
•
Automatically after 30 minutes
