
37/81
Siemens
RDG100.., RDG110.., RDG160T.. Basic Documentation
CE1P3181en
Building Technologies
Functions
2015-07-29
Modulating control: 3-position, PWM or DC 0…10 V
The diagrams below show the control sequence of modulating PI control.
Heating mode (P01=0)
Cooling mode P01=1)
Changeover (P01=2 or P01= 3)
T[°C] Room temperature
w
Room temperature setpoint
YHC1 Control command "Stage 1"
YHC2 Control command "Stage 2"
XpH Proportional band "Heating" (P30)
XpC Proportional band "Cooling" (P31)
X
dz
Dead zone (P33)
w
D
Setpoint differential (P34)
The diagrams only show the PI controller’s proportional part.
Setting the sequence and the control outputs
Refer to section 4.5, 4.7.1 and 4.7.2.
Note