Siemens Synco 200 - Page 108

The solar plant switches on as soon as the temperature in the panel (main
controlled variable) is 5 K above the storage tank temperature (differential
controlled variable):
Example of solar plant
(differential variable)
DO
AI
T
T
Y
X1
Y
SIGNAL Y
LABEL
TEMP
yp yp yp
xx
DIFF
x
Q
MAIN
LIM SEQLIM
SHIFT
1
CTLOOP 1
DV ALM
SEQ2 Y SEQ2 P SEQ1 Y SEQ1 P SEQ4 Y SEQ4 P SEQ5 Y SEQ5 P
p2
PUMP 1
PUMP 1
Y
X2
Y
SIGNAL Y
LABEL
TEMP
y
3101S28
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Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Controller (CTLOOP x) 29.08.2008