National Instruments GPIB-PC - Manual (Page 195)

Section Five IBIC
©National Instruments Corp. 5-7 GPIB-PC User Manual
IBIC Functions and Syntax
IBIC displays the following information about each function call
immediately after that call:
• IBRD and IBRDA data messages are displayed on the screen in
hex and ASCII formats.
• The global variables IBSTA , IBCNT , and IBERR are displayed
on the screen.
IBIC and programming languages of Section Four differ in the syntax
of the function call. These differences are shown in Table 5.1. The
main differences are that
IBWRT , IBWRTA , IBCMD , and IBCMDA
messages are entered as strings from the keyboard.
The BD unit descriptor is not explicitly a part of IBIC function syntax.
Before using any device or board, first call IBFIND to open that unit
and to pass the unit descriptor to IBIC . The screen prompt identifies
which of these opened units IBIC will use in subsequent calls. Use the
SET function to change from one of these units to another.