Chapter 2: Terminal Interfaces 2-13
Escape
commands
are
addressed
to
the
source
scanner
through
the
“Application
Work
Groups.”
Once
a
command
is
sent,
all
scanners
in
a
group
respond
to
that
command.
Because
of
this
situation,
it
is
recommended
that
each
scanner
be
assigned
to
its
own
group.
The
commands
to
which
the
scanner
responds
are
listed
on
in
Chapter
2
.
The
<ESC>
is
a
1
B
in
hexadecimal.
A
typical
command
string
is
y
<ESC>
x,
where
“y”
is
the
application
work
group
number,
“<ESC>
x”
is
the
escape
command
and
the
comma
is
the
terminator.
Commands
may
be
strung
together
to
create
custom
response
sequences.
An
example
of
a
command
string
is
listed
below.
0<ESC>4<ESC>5<ESC>6,
The
above
example
makes
a
scanner
in
application
work
group
zero
beep
low,
medium,
high.
Once
Host
ACK
is
enabled,
the
system
works
as
follows:
•
The
scanner
reads
a
code
and
sends
data
to
the
base/host
system.
No
audible
or
visual
indication
is
emitted
until
you
receive
an
escape
command.
The
scanner
read
illumination
goes
out
upon
a
successful
read.
•
Scanner
is
suspended
until
1)
a
valid
escape
string
is
received
from
the
host
system
(through
the
base)
or
2)
the
scanner
“times
out.”
•
Once
condition
1
or
2
above
has
been
met,
the
scanner
is
ready
to
scan
again
and
the
process
repeats.
Time
out
is
indicated
by
three
rapid
beeps
at
the
same
pitch.
A
time
out
occurs
if
the
source
scanner
does
not
receive
a
valid
escape
command
in
10
seconds.
If
a
time
out
occurs,
the
operator
should
check
the
host
system
to
understand
why
a
response
to
the
scanner
was
not
received.
Summary of Contents for RealScan 7837-3000
Page 1: ...NCR RealScan 7837 3000 Release 1 0 User Guide B005 0000 1610 Issue B...
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Page 124: ...6 36 Chapter 6 Symbologies...
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Page 160: ...11 4 Chapter 11 Product Specifications Standard Cable Pinouts Keyboard Wedge...
Page 161: ...Chapter 11 Product Specifications 11 5 Standard Cable Pinouts Wand Emulation...
Page 162: ...11 6 Chapter 11 Product Specifications Standard Cable Pinouts Serial Output...
Page 163: ...Chapter 11 Product Specifications 11 7 Standard Cable Pinouts USB...
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Page 175: ...Appendix A A 5 Sample Symbols UPC A Interleaved 2 of 5...
Page 176: ...A 6 Appendix A Sample Symbols Codabar A13579B Code 93 123456 9 01 00123456789012...
Page 177: ...Appendix A A 7 Programming Chart...
Page 181: ...Appendix A A 11 D E F A L T Standard Product Default Settin...
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