VTK
‐
VS
‐
BA
‐
004e
‐
B
|
User
Manual
MDS
3200A
|
Operation
33
6
OPERATION
6.1
Triggering
a
Dispense
Sequence
There
are
three
different
options
to
trigger
a
dispense
sequence:
by
touch
panel
on
the
MDC
3200A
controller
press
the
[trig]
button,
a
dispensing
sequence
with
pre
‐
set
parameters
will
be
trig
‐
gered
by
RS
‐
232C
use
the
command
“VALVE:OPEN“
by
PLC
command
real
time
triggering
by
direct
I/O
6.2
Dispensing
and
Positioning
of
a
Multitude
of
Dots
To
combine
a
multitude
of
dots
to
a
predefined
structure
(e.
g.
a
line
or
a
circle),
use
one
of
the
following
four
modes:
Burst
Mode
A
single
trigger
impulse
by
PLC
signal
causes
a
predefined
number
of
dispense
cycles.
‐
Number
of
Pulses:
predefined
value
(e.g.
1
‐
32000)
Single
‐
Shot
Mode
Every
dispense
point
is
triggered
by
an
individual
PLC
signal.
When
dispensing
a
continuous
feature
(such
as
a
straight
line
or
a
circle),
the
frequency
of
the
dispense
trigger
signal
should
be
proportional
to
the
trajectory
speed
of
the
axis
system.
This
is
necessary
to
achieve
a
continuous
line
width.
‐
Number
of
Pulses:
“1”
Infinite
Mode
Continuous
dispensing
as
long
as
the
PLC
trigger
input
is
“logic
1”.
Dispensing
will
stop
when
the
signal
is
changed
to
“logic
0”
‐
Number
of
Pulses:
“infinite”
(when
programmed
through
touch
panel)
“0”
(when
programmed
through
RS
‐
232C)
External
Mode
The
“External
Mode”
will
shift
the
responsibility
of
time
control
of
the
parameter
“Open
Time”
to
the
higher
level
machine
control.
(This
may
require
a
very
precise
time
control
of
the
higher
level
PLC.)
As
a
result,
the
valve
would
function
like
a
“Time
‐
Pressure
‐
Valve”.
‐
Number
of
Pulses:
should
be
set
to
“1”
‐
Open
Time:
“external”
When
the
trigger
signal
is
set
to
“logic
1”,
the
valve
will
open.
It
will
remain
open
as
long
as
the
trigger
signal
remains
on
“logic
1”.
It
will
start
to
close
when
the
trigger
signal
is
switched
to
“logic
0”.
Parameters
like
Rising,
Falling
and
Needle
Lift
will
be
executed
as
saved
in
the
MDC
memory
(preset
values).
After
the
valve
has
completely
closed
the
controller
is
ready
to
receive
the
next
trigger
signal
to
start
the
process
again.
INFORMATION!
(open
time
and
needle
lift)
The
maximum
value
for
the
“Open
Time”
is
limited
to
15
ms,
if
the
“Needle
Lift”
is
set
to
more
than
80
%.
The
length
of
the
“Open
Time”
depends
on
the
PLC
‐
signal
(log
‐
ic
1)
.
Summary of Contents for MDS 3000 Series
Page 1: ......
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