National Instruments NI-488.2 Benutzerhandbuch
Glossary
G-4
ni.com
hex
Hexadecimal—A number represented in base 16. For example,
decimal 16 is hex 10.
decimal 16 is hex 10.
high-level function
See
HS488
A high-speed data transfer protocol for IEEE 488. This protocol increases
performance for GPIB reads and writes up to 8 Mbytes/s, depending on
your system.
performance for GPIB reads and writes up to 8 Mbytes/s, depending on
your system.
Hz
Hertz.
I
I/O
Input/output—In this manual, it is the transmission of commands or
messages between the system via the GPIB board and other devices
on the GPIB.
messages between the system via the GPIB board and other devices
on the GPIB.
I/O address
The address of the GPIB board from the point of view of the CPU, as
opposed to the GPIB address of the GPIB board. Also called port address
or board address.
opposed to the GPIB address of the GPIB board. Also called port address
or board address.
ibcnt
,
ibcntl
After each NI-488.2 I/O call, these global variables contain the actual
number of bytes transmitted. On systems with a 16-bit integer, such
as MS-DOS,
number of bytes transmitted. On systems with a 16-bit integer, such
as MS-DOS,
ibcnt
is a 16-bit integer, and
ibcntl
is a 32-bit integer.
For cross-platform compatibility, use
ibcntl
.
iberr
A global variable that contains the specific error code associated with
a function call that failed.
a function call that failed.
ibsta
At the end of each function call, this global variable (status word) contains
status information.
status information.
IEEE
Institute of Electrical and Electronic Engineers.
interface message
A broadcast message sent from the Controller to all devices and used
to manage the GPIB.
to manage the GPIB.
ISA
Industry Standard Architecture.
ist
An Individual Status bit of the status byte used in the Parallel Poll
Configure function.
Configure function.