Chapter 3
Software Installation and Configuration
© National Instruments Corp.
3-11
GPIB-PCIIB/MS-DOS
Default Configurations
The software has factory default configurations. For example, the default
device names of the 16 GPIB devices are
DEV1
through
DEV16
, but you
can choose to assign more descriptive names to each device, such as
METER
for a digital multimeter. Do not, however, give a GPIB device the
same name as a directory or file on your diskette drive.
You can also use
IBCONF
to look at the current default settings in the
handler file.
Note:
If you do not make changes using
IBCONF
, default
characteristics of the software remain in effect.
Primary Default Characteristics
The following are the primary default characteristics of the handler:
•
There are 16 active devices with symbolic names
DEV1
through
DEV16
.
•
GPIB addresses of these devices are the same as the device number–for
example,
DEV1
is at address 1.
•
The 16 devices are assigned to
GPIB0
as their access board.
GPIB0
is
the symbolic name of the first GPIB-PCIIB board in your system. If
you have an additional GPIB-PCIIB board in your system, its symbolic
name is
GPIB1
.
•
Each GPIB-PCIIB board is system controller of its independent bus
and has a GPIB address of 0.
•
The END message is sent with the last byte of each data message to a
device. Each data message that is read from a device automatically
terminates when END is received. No EOS character is recognized.
•
The time limit on I/O and wait function calls is approximately 10 sec.
•
GPIB0
is a GPIB-PCIIB board at base I/O address 02B0 hex, using
DMA channel 1 and no interrupt line.