Commands; Device Clear; Group Execute Trigger; (Get) - HP 54501A Programming Reference Manual

Bus
Commands
The
following commands are
IEEE
488.1 bus commands
(ATN
true).
IEEE
488.2 defines many of the
actions
which are taken when these
commands are received
by
the instrument.
Device Clear
The
device clear
(DCL)
or selected device clear
(SDC)
commands clear
the input and output buffers, reset the parser, and clear any pending
commands.
GrOUp Execute
The group execute trigger
(GET)
command
arms the
trigger
which
is
the
Trigger (GET)
same
action produced by sending the RUN
command.
Interface Clear
The interface
clear
(IFC)
command
halts all bus activity. This includes
(IFC)
unaddressing all listeners and the talker, disabling serial poll on all
devices,
and returning control to the system controller.
Status
Annunciators
The
HP
54501A will display the
HP-IB
status
on the
CRT. The
message
will indicate whether the instrument is
in the remote mode, whether talk
or
listen is addressed,
and whether the instrument
has
requested
service.
When
the instrument
is
in the local
mode only the SRQ
annunciator may
be displayed.
HP 54501A
Programming
Interface Functions
2-3