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BAL2ERE
6.4
Switching
functions
6.4.1
Absolute
switching functions
The two independent switching functions
-
A and
B
--
for
each channel
can be
put to different
uses:
a)
as
a
simple
vacuum
monitor
Select
'Absolute'
as
the type
of
switching functíon
<trip>
«TYPE»
:
«ABS»
Select switching function
A and
define the threshold
<trip>
«LEVEL-A»
:
«x.xxEs×x»
(Level A)
The «DO·A» switching function status
will
switch to
OEF
Switching function
»ON«
when
the actual value
goes below
the threshold
status
If
you have configured
one or more DO
420 modules,
<trip>
«OO-A»
:
xx
you can assign the switching function status
to
a
DO
channel
b) als
einfacher Ûberdruckwächter
Select
'Absolute'
as the
type
of
switching
function
<trip>
«TYPE»
:
«ABS»
Select switching function
B
and
define the threshold
<trip>
«LEVEL-B»
:
«xx
Esxx»
(Level
B)
The «DO-B» switching function status
will
switch to
ON
,
Switching function
»ON« when
the
actual
value goes
above
the
threshold
status
value
if
you
have
configured
one or more DO
420 modules,
<trip>
«DO-B»
:
xx
you
can
assign
the
switching function status to
a
DO
channel
c)
as
a
window monitor
(This application requires
a
digital output module)
Select
'Absolute'
as
the
type
of
switching
function
<trip>
«TYPE»
:
«ABS»
Select switching function
A
and define the upper
<trip>
«LEVEL-A»
.
«x.xxEsxx»
threshold
(Level A)
Select switching function
B
and
define the lower thres-
<trip>
«LEVEL-B»
:
«x.xxEsxx»
hold
(Level
B)
Assign the statuses
for
both switching functions to the
<trip>
«DO-A»
:
xx
same DO channel (automatic AND logic gate)
<trip>
«DO-B»
:
×x
The resulting switching function status at DO bit
xx
DRE
Switching function
will correspond to the
two
statuses »ON«
and
»OFF«
Do-A
status
statuses
in
the drawing to
the
right
///
Threshold
A
76
Measuring with the QMS 421
OMS421gg.opm
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