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Section Three GPIB-PC Functions — Introduction
©National Instruments Corp. 3-15 GPIB-PC User Manual
Group V
Group V functions are used when the GPIB-PC is not CIC. An example
is a system where the computer in which the board is installed performs
as an instrument, but is controlled by another device on the GPIB.
Group V functions are as follows:
• IBRSV,
• IBLOC,
• IBPPC,
• IBIST, and
• IBWAIT.
These functions are used to:
• Request service from the CIC.
• Simulate a front panel "return to local" switch.
• Reconfigure a board or device for a parallel poll.
• Locally configure for parallel polls and change the parallel poll
flag.
• Wait for the CIC to execute certain actions.
IBRSV (bd,v)
IBRSV requests service from the CIC and to set the status byte that is
sent when the board is serially polled by the controller.
IBLOC (bd)
IBLOC sends a return to local message to the board. The message
clears an internal remote status condition if it is set and the internal
lockout status condition is not set. These conditions can be checked
with the IBWAIT function. How the application program interprets this
action is system dependent.