33/81
Siemens
RDG100.., RDG110.., RDG160T.. Basic Documentation
CE1P3181en
Building Technologies
Functions
2015-07-29
The diagrams below show the control sequence for 2-position control.
Heating mode with manual selection
(P01=2) or
for P09 >= P10 in heating sequence
*)
Cooling mode with manual selection
(P01=2) or
for P09 >= P10 in cooling sequence
*)
Heating and cooling mode (P01=04)
T[°C] Room temperature
w
Room temperature setpoint
YH Control command "Valve" (heating)
YC Control command "Valve" (cooling)
SDH Switching differential "Heating" (P30)
SDC Switching differential "Cooling" (P31)
X
dz
Dead zone (P33)
Modulating control: 3-position or PWM
The diagrams below show the control sequence of modulating PI control.
Heating mode with manual selection
(P01=2) or
for P09 >= P10 in heating sequence
*)
Cooling mode with manual selection
(P01=2) or
for P09 >= P10 in cooling sequence
*)
Heating and cooling mode (P01=04)
T[°C] Room temperature
w
Room temperature setpoint
YH Control command "Valve" (heating)
YC Control command "Valve" (cooling)
XpH Proportional band "Heating" (P30)
XpC Proportional band "Cooling" (P31)
X
dz
Dead zone (P33)
*)
see section 4.3.
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.
On/Off control
Note