Chapter 5: Programming 5-31
Bar Code Length
The
Bar
Code
Length
parameter
selects
the
method
for
determining
if
an
Interleaved
2
of
5
bar
code
is
a
valid
length.
The
Range
Check
method
identifies
a
length
range
by
specifying
the
minimum
and
maximum
number
of
characters.
The
Specific
Check
method
identifies
two
specific
bar
code
lengths
by
specifying
the
number
of
characters
in
each.
With
this
option,
the
number
of
characters
in
all
Interleaved
2
of
5
bar
codes
must
be
one
of
the
two
numbers.
Scan
the
Hex
0
tag
to
use
the
Range
Check
method,
scan
the
Hex
1
tag
to
use
the
Specific
Check
method.
It
is
best
not
to
use
ITF
if
more
than
one
length
of
bar
code
is
used.
The
symbology
has
an
inherent
weakness
where
any
scanner
can
see
part
of
the
bar
code
and
think
it
is
complete.
The
options
below
provide
protection
against
this.
From
strongest
protection
to
weakest
protection
they
are:
•
Specific
length,
same
value
as
“Value
1”
and
“Value
2”
•
Specific
check,
different
values
as
Values
1
and
2
•
Range
Check
Value 1 and 2
The
Value
1
and
Value
2
parameters
specify
the
valid
Interleaved
2
of
5
bar
code
lengths.
Use
these
options
with
the
Bar
Code
Length
parameter
option
described
in
Bar
Code
Length.
If
the
Range
Check
method
is
selected,
Value
1
specifies
the
minimum
number
of
characters
in
a
valid
Interleaved
2
of
5
bar
code
and
Value
2
specifies
the
maximum
number
of
characters.
If
the
Specific
Check
method
is
selected,
Value
1
contains
one
specific
number
of
characters
and
Value
2
contains
another.
Accepted
values
for
Value
1
and
Value
2
are
04
to
58
readable
characters.
The
number
of
readable
characters
must
be
an
even
number;
if
an
odd
number
is
specified,
it
returns
a
Program
Tag
Error.
Each
value
is
input
using
two
Hex
tags.
The
first
can
be
Hex
0
through
Hex
5
and
the
second
can
be
Hex
0
through
Hex
9
.
Check Digit Present
The
Check
Digit
Present
parameter
determines
if
the
bar
code
must
contain
a
correct
check
digit
to
be
identified
as
valid.
If
this
function
is
enabled,
the
bar
code
is
ignored
if
a
check
digit
is
not
present.
Scan
the
Hex
0
tag
to
disable
this
option,
or
the
Hex
1
tag
to
enable
it.
Transmit Check Digit
The
Transmit
Check
Digit
parameter
selects
whether
to
send
the
check
digit
to
the
host
terminal.
Scan
the
Hex
0
tag
to
disable
this
option,
or
the
Hex
1
tag
to
enable
it.
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