S Mode Functions
Chapter 5
GPIB-232CT User Manual
5-36
© National Instruments Corp.
rsc - Request System Control
Type:
Initialization
function
Syntax:
rsc
[bool]
<CR>
Purpose:
You
use
rsc
if some other device in your GPIB system
should be System Controller.
Remarks:
If the argument
bool
is 1, the GPIB-232CT configures itself
to be the GPIB System Controller. If the argument
bool
is 0,
the GPIB-232CT configures itself as not System Controller.
If you call
rsc
without an argument, the GPIB-232CT returns
to you its System Controller status, which is 0 if the
GPIB-232CT is not currently System Controller or 1 if the
GPIB-232CT is System Controller.
As System Controller the GPIB-232CT can send the Interface
Clear (IFC) and Remote Enable (REN) messages to GPIB
devices. If some other Controller asserts Interface Clear, the
GPIB-232CT cannot respond unless it is configured as not
System Controller.
In most applications, the GPIB-232CT will be System
Controller. In some applications, the GPIB-232CT will never
be System Controller. In either case,
rsc
is used only if the
computer is not going to be System Controller while the
program executes. The IEEE-488 standard does not
specifically allow schemes in which System Control can be
passed from one device to another; however,
rsc
could be
used in such a scheme.
The GPIB-232CT configures itself to be System Controller at
power-on.
See Also:
sic
and
sre
.
