10 | Basic Connection Examples
54 / 56
0870166596_MV0040-0080C-D_PCI_A0004_IM_de_MD
Casc
ade a
nd
A
lter
n
ati
n
g
o
perati
o
n
(“dup
le
x”
sy
stem)
-
Succ
ess
full
y
test
ed
pr
oc
ed
ur
e:
Both pum
ps ar
e pr
ess
ur
e
contr
olled
w
ith t
he
sam
e ac
tual
value s
ignal
(r
ealiz
abl
e
by
:
1
pr
es
sur
e
trans
m
itt
er
4
-
20
mA
and
1 signal
split
ter
or 2 pr
ess
ur
e
transmitt
er
4-20
mA
or 1 pr
es
sur
e
tran
smitter
0(2)-10 V conn
ect
ed
to
both pum
ps
)
-
setpoint
setting
1
and 2
parameteriz
ed
w
it
h slight
ly
dif
fer
ent
pr
e-s
et
values
e.g. pr
es
sur
e
set
ting
on
140 m
bar
, s
econd
pum
p w
ill
join
if
pr
ess
ur
e
ex
cee
ds 200
mbar:
pump
1:
P12.1
--> 0 (s
etpoint
setting
w
ith
fix
ed se
tpoint
1
/2); P12.2 --> appr
ox
. 14 (appr
ox
.
140 m
bar
;)
P12.3 --> appr
ox
. 2
0
(appr
ox
. 200 m
bar)
pump
2:
P12.1
--> 0 (s
etpoint
setting
w
ith
fix
ed se
tpoint
1
/2); P12.2 --> appr
ox
. 20 (appr
ox
.
200 m
bar
;)
P12.3 --> appr
ox
. 1
4
(appr
ox
. 140 m
bar)
->
Both pum
ps
w
ill
start
, pum
p 2 w
ill sw
itc
h of
f af
ter
pr
es
sur
e
dr
ops
below
200
m
bar
and
af
ter the
sleep-t
im
e,
pu
mp 1 w
ill c
ontr
ol
dow
n
to
14
0
mbar
If
the
value
of
200
mbar is a
chiev
ed
due
to ex
eedin
g
vac
uum
d
emand
(and
w
ake up
lev
el is pas
sed),
pump
2 w
ill st
art/run
as w
ell
-
sw
it
ching
to
fix
ed s
etpoint
2
o
n both pum
ps
w
ill
be d
efi
ned
by parameter
P4.16
(P4.16 --> 5 (digit
al
input
5
(terminal
15)
as a s
w
itch))
->
If t
he
digit
al
input
5
w
ill be
set (by sw
itc
h
(s
ee
also
av
ailable
w
iring diagram
for triplex
sy
stem)
o
r
PLC) to H
IGH the v
alues
on both
pu
mps of P12.3 (pum
p 1
:
20; pump
2: 14) w
ill
be
ac
tiv
ated w
hic
h
mean
s t
hat pum
p 2
w
ill c
ontr
ol
dow
n to 140
mbar
and
w
ill
do
the
main
part of the w
ork
Содержание Mink MV 0040 C
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