Alternative Method Of Programming; Calibration Via The Bus - Datron 1061A User Handbook Manual

Alternative
method
of
programming
Binary program.
Using
only four
bytes
the
majority of
instrument functions
may
be
programmed. The
first
of the
group must
be
an
ASCII
'B'
followed by three
bytes containing
programming
information
in
the
following format.
In this
programming
mode
the terminator
must
be
an
EOI
as the
"="
character
is
not recognised.
bit
t>8
by b 6 b 5 b
4
b3 b
2
bi
byte
1
output
notation
function
_
range
byte 2 ratio
service request
Superfast
Av/dB/
Hi
Res
byte 3
filter
trigger
Max/Min Maths
Each group
of
bits
is
replaced
by
the binary
equivalent of the
numeric value used for
normal
programming. Thus
to
program
DCV
(F3)
by
binary
programming,
byte
I,
bits 6, 5,
4
are
011
respectively.
Example:
To program
scientific
output
notation with
full
status,
DC
current,
10mA
range, not
ratio,
generation of
SRQ
on
data ready for output,
not
superfast,
not
Av/dB, not
filter,
internal trigger,
and
not
maths
or
max/ min mode. The normal
string to
set
the
instrument
to
the
above
status
is
0
1
F5R4P0Q1
S0A0C0T0M0N0.
(This string
could be shorter
by
programming
only those
controls
that
need updating.)
The
equivalent
binary
program
bytes
are:
bit
n a H
sa
turn
byte
1
eh n
0
a
a
0 0
byte 2
0 0
0 0
l
0
0 0
byte 3
0 0
0
0
0
Binary
dump.
After
being
programmed with
H
the
DVM
will
assemble the current status
of the
instrument
in
the identical
format
to that
of binary
program.
When
the controller
addresses the
DVM
to talk,
these 3 bytes together
with an
EOI
with the
last
byte
will
be output.
NOTE:
The
three bytes
will
be overwritten
by
any
commanded
reading occurring
between
the
dump command and
the
output of the result.
Calibration via
the
bus
The
DVM
can be calibrated
remotely using the
programming
instructions provided.
For
full
details
of
procedure
see
the Calibration
and
Servicing
Handbook.
Invalid use of these instructions will
cause
the
generation of
an option error
SRQ.
Note
that
all
groups
of
bits
must
be
programmed
to
the desired value irrespective
of
any necessity for
update.
Programming
less
than
three bytes
will
cause
a
syntax
error.
4-9