Peripheral
Devices
PLOTTER CONTROL
Refer to Appendix D for information on control of plotters.
EXTERNAL PRINTER OPERATIONS
With
an
external
printer
connected, you
may
do
any
of
the
following operations:
• Perform a
line
feed (advance
the
paper
one line).
•
Perform
a form feed (advance
the
paper
to
the
top of
the
next
page).
•
Print
one line.
•
Print
all
data
displayed on
the
screen.
•
Print
all
data
in
the
active workspace.
• Select one of
three
operating
modes: Record mode, Log Top mode,
or
Log
Bottom
mode.
All
of
the
above
printer
operations
can
be
initiated
either
locally, by
operator
keystrokes,
or
remotely, byescapesequences
sent
from a
program
operating
ona
host
computer.
In
both
cases,
the
external
printer
must
be
selected
as
the
destination
device for device control commands.
SELECTING THE EXTERNAL PRINTER AS THE "DESTINATION"
DEVICE
To
control
the
printer,
you
must
select
it
as
the
destination
device for device control com-
mands.
This
can
be
done
using
either
the
function keys
or
an
escape sequence.
To
do so
using
the
function keys,
press
the
following keys,
in
sequence:
.,
device
control,
"to"
deVices,
and
TO
EXT DEV.
An
asterisk
in
the
TO
EXT
DEV
function key label indicates
the
external
printer
is selected.
Alternate
presses of
the
key
display
and
delete
the
asterisk.
Programmatically,
the
Uto"
devices
are
selected by including one
or
more
ttd"
parameters
in
the
device control escape sequence.
The
escape sequence to
transfer
data
from
the
display to
printer
is
of
the
form:
Ec&p
<a>d
<b>d
<y>
Where
tty"
lines
of
data
are
transferred
from
the
display
to
devices
tta"
and
ttb".
The
values
for
tta"
and
ttb"
may
be
4 for
the
printer
as
specified
in
the
Printer
Code 4
entry
on
the
Terminal Configuration
menu,
or
6 for
the
integral
printer. Use of
the
ttd"
parameter
alters
the
selection of
the
ttt 0 dev
ices"
accordingly.
If
no
ttd"
parameter
is
specified,
then
the
currently
assigned
ttto"
device(s)
is
used.
The
tty"
value
can
be
either
B (copy line), F (copy page),
or
M (copy alD.
6-7
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