National Instruments NI-488.2 User Manual
Page 63
Chapter 7
Interactive Control Utility
© National Instruments Corporation
7-3
Note
If you type a command and no parameters, Interactive Control prompts you for the
necessary arguments. If you already know the required arguments, you can type them at
the command prompt, as follows:
:
ibdev 0 6 0 13 1 0
ud0:
Note
If you do not know the primary and secondary address of your GPIB instrument, use
Interactive Control to discover it. First, select 488.2 style by entering
set 488.2 #
where
#
represents the board number (0–99) to which you have connected your device. Then use
the
FindLstn
command to discover the address of your device. For help using
FindLstn
,
enter
help findlstn
at the command prompt.
2.
After you successfully complete
ibdev
, you have a
ud
prompt.
The new prompt,
ud0
, represents a device-level handle that you
can use for further NI-488.2 calls. To clear the device, use
ibclr
,
as follows:
ud0:
ibclr
[0100] (cmpl)
3.
To write data to the device, use
ibwrt
. Make sure that you refer to the
documentation that came with your GPIB instrument for recognized
command messages.
ud0:
ibwrt
enter string:
"*IDN?"
[0100] (cmpl)
count: 5
Or, equivalently:
ud0:
ibwrt "*IDN?"
[0100] (cmpl)
count: 5
4.
To read data from your device, use
ibrd
. The data that is read from
the instrument is displayed. For example, to read 29 bytes, enter the
following:
ud0:
ibrd
enter byte count:
29
[0100] (cmpl)
count: 29
46 4C 55 4B 45 2C 20 34
FLUKE, 4
35 2C 20 34 37 39 30 31
5, 47901
37 33 2C 20 31 2E 36 20
73, 1.6
44 31 2E 30 0A
D.10.