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Siemens RDG100…/RDG110…/RDG140.../RDG160… Basic Documentation CE1P3076.en
Building Technologies Functions 28 May 2009
Modulating control 3-position, PWM or DC 0…10 V
The diagram below shows the control sequence for modulating control.
Heating mode
(automatic changeover = heating or heating only)
Cooling mode
(man. /auto. changeover = cooling or cooling only)
Y [%]
100
0
w
3076D09
T[°C]
Y1
XpH
YE
w
D
XpH
Y [%]
100
0
w
3076D08
T[°C]
Y1
XpH
YE
x
dz
XpC
Heating mode with manual changeover (P01=2)
(manual changeover = heating)
T[°C] Room temperature
W Room temperature setpoint
Y1 Control command “Valve”
YE Control command “Electrical heater”
XpH Proportional band “Heating” (P30)
XpC Proportional band “Cooling” (P31)
X
dz
Dead zone (P33)
XpH
100
0
w
Y [%]
3076D10
T[°C]
YE
w
D
Setpoint differential (P34)
The diagrams only show the PI controller’s proportional part.
Setting the sequence and the control outputs
Refer to sections 4.5 (applications), 4.7.1 (sequences) and 4.7.2 (outputs).
Control se
quence
modulatin
g output
Note
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