Siemens Synco 200 - Page 101

9.2.7.5 Application example “Room-supply air temperature cascade
controller”
The example shown in the following is the programmed standard application with
controller type RLU222, basic type A16, for a plant with an air heating coil and air
cooling coil.
Plant diagram
Functions:
• Room temperature cascade control
• Summer / winter compensation
• Frost protection
• Fan release
Y3
T
F3
N.X3
N.Q1
M
M3
N.Q2
T
N.X4
B9
Cascade
N.X2
B5
T
N.Y1
N.X1
B1
T
N.D1
S5
1
1
3101S29
M
Y4
N.Y2
Controller sequences:
Function diagrams
Y
ctl
1
0
Y3
TSu
SpTSuC
3101D14
SpTSuH
M3
Y4
Preselected setpoints for supply air temperature control:
SU MAX
SU MIN
3101D15
TR
SETCOOLSETHEAT
SpTSu
Summer / winter compensation:
TOa
Sp
3101D16
101 / 174
Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Controller (CTLOOP x) 29.08.2008