Solartron 1287 - Gpib

Setting
up a
Parallel
Poll
The instrument can be
configured to
give
a
parallel
poll tme/false response
on a
selected GPIB
data line, to indicate whether or not the instrument
is requesting
service.
However, the instrument
must first
be configured
for serial poll.
To
set up a parallel poll configuration
send the
remote
command :
PPn
where
n is an integer from 1 to
8,
defining which GPIB data
line is to carry the
response.
Sending PPO unconfigures parallel poll.
To
select the sense of the parallel poll line send the remote
command SEn, where
n=l signifies true and n=0 signifies
false.
The parallel poll response is also cleared
by
any
change to the serial poll value,
and
by
power-off. Unlike
serial
poll, parallel poll need not
be reconfigured after
each service request.
3.5 GPIB PLOTTING
The GPIB plot facility is compatible only with plotters
using Hewlett-Packard
Graphic Language (HPGL),
or Enertec
Schlumberger
Graphics Language.
These
plotters
require that the
SI1287
output
has
’comma’ as
the output separator and
’cr If as the output terminator; both
are default characters.
If the GPIB plotter can
be put into Listen Only mode, it can
be
driven directly
from the
SI 1287
without
needing a controller on the
bus.
To
operate in this way,
ensure
that
the DATA OUTPUT {GPIB} menu
is set to [off], the default
state, so
that only plotter commands
are passed to the GPIB. Set the
plotter to Listen
Only, and the SI1287 rear panel switch
to
Talk Only.
However,
if the plotter has no Listen Only mode,
a
controller
is necessary to
instmct the plotter to ’listen’
to the SI1287. To operate using a controller
on the
GPIB,
set both plotter and SI1287 to normal Talker/Listener
modes, and switch
the DATA OUTPUT {GPIB}
menu to [off], SRQ can be used to signal the
end
of plotting.
In this case, configure the SI1287 to set bit 8 of the status
byte at ’End
Plot’.
The PLOT
menu is detailed in Chapter
3,
section 9.
CSB/SI1287 User
Guide/Issue AA
4.9