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Siemens Building Technologies
Basic Documentation RVL471
CE1P2524E
HVAC Products
3 Fundamentals
23.10.2002
3.3
Setting levels, function blocks and plant
types
Lev
e
l
F
unc
ti
on b
lo
c
k
Com
b
in
at
io
n of
pla
n
ts
252
4
T
0
1
e
L
o
c
ki
ng
f
u
n
c
ti
on
s
T
ime
sw
it
c
h
p
ro
g
ra
m 3
S
e
rv
ic
e f
u
n
c
ti
o
n
s
an
d ge
ne
ra
l
se
tt
in
gs
/R
FN
LQ
J
OHY
HO
1
-0
1
-1
1
-2
1
-4
1
-5
2
-0
2
-1
2
-2
2
-3
2
-5
3
-0
3
-1
3
-2
3
-3
3
-4
3
-5
4
-0
4
-1
4
-2
4
-5
5
-0
5
-1
5
-2
5
-4
5
-5
6
-0
6
-1
6
-2
6
-5
C
a
sc
ad
e s
lave
L
e
g
ion
el
la
f
u
nc
ti
o
n
E
n
du
se
r s
p
a
c
e
he
a
ti
n
g
End
u
s
e
r d.h.w.
E
n
d
u
se
r ge
ne
ra
l
Pla
n
t typ
e
End
u
s
e
r
Sp
ac
e
hea
ti
n
g
3-
po
si
ti
o
n
a
c
tu
ato
r he
at
in
g ci
rc
ui
t
Boile
r
Se
tpo
int lim
it
ati
o
n
o
f
re
tu
rn
t
e
m
p
e
ratu
re
D
ist
ri
ct
h
e
at
in
g
M
a
x.
l
im
it
a
ti
o
n of
d.
h
.w
.
re
tu
rn
t
e
mp
erat
u
re
Ba
s
ic s
e
ttin
gs
d.h.
w.
R
e
lea
s
e
o
f d.h
.w. ch
argin
g
D
.h.w
. s
to
rag
e
ta
n
k
3-po
siti
o
n
d
.h
.w
. ac
tu
a
tor
D
.h
.w.
pr
iori
ty
an
d
fl
o
w
tempera
tu
re
se
tp
o
in
t
Mult
ifun
c
tio
na
l rela
y
He
atin
g
en
g
in
e
er
'H
ULY
DW
LYH
D
FWL
RQ
WLP
H
G
K
Z
KH
DW
LQJ
YL
D
KH
DW
H
[F
KD
QJ
HU
The above table shows
•
the assignment of function blocks to the 3 operating levels
•
the function blocks activated with the different plant types
