Keithley 237

+
SECTION3
IEEE-488
Reference
3.6.4
D-
Display
Purpose
Format
Parameters
Default
Description
Programming
Notes
Programming
Example
To
display
messages
on
the
front
panel.
Dn,aaa
...
aX
Where:
n
=
command
option
number
a =
ASCII
character
to
display
(18
maximum)
DOX
Return
display
to
normal
operation.
D1,aaa
...
aX
Display
characters
"aaa",
where
"aaa"
represents
printable
ASCII
characters.
D2,aaa ...
aX
Display
characters
"aaa"
and
save
message
in
non-volatile
memory.
Upon
power-up,
or
after
receiving
a DCL, SOC,
or
JOX
command,
the
message
stored
with
the
02
command
remains
saved
in
memory.
The
D
command
lets
you
display
messages
on
the
front
panel.
Up
to
18 characters,
including
blanks,
can
be
sent
by
simply
following
the
appropriateD
command
with
ASCII characters.
Characters
that
can
be
displayed
include:
0-9,
A-Z
(except X),
arith-
metic
and
most
punctuation
symbols.
If
a
character
cannot
be
displayed,
for
example
{
or}
(curly braces),
no
segments
of
that
particular
character
will
turn
on.
1.
As
with
other
device-dependent
commands,
the
D
command
string
must
be
terminated
with
an
X.
2.
Spaces
in
the
command
string
are
displayed.
3.
Any
extra
characters
in
the
string
are
ignored.
If
there
are
fewer
than
18
characters
between
the
comma
and
the
X,
the
characters
are
left-justified
and
the
rest
of
the
display
is
blank.
4.
Error
messages
overwrite
a
displayed
user
message.
5.
To
return
the
display
to
normal,
send
DOX,
perform
device
clear,
or
return
the
Model236/237
/238
to
the
local state.
6.
The
U2
command
is
used
to
get
the
stored
message.
This
is
shown
in
the
program
example
that
follows.
10
20
DIM
Message$[25]
REMOTE716
+
!
Dimension
string
for
message
!
Set
unit
for
IEEE-488
communi-
cation
3-25