Programming instructions

Glossary
© National Instruments Corporation G-5 LabVIEW Data Acquisition Basics Manual
default setting A default parameter value recorded in the driver. In many cases, the
default input of a control is a certain value (often 0) that means
use the
current default setting
. For example, the default input for a parameter
may be
do not change current setting
, and the default setting may be
no AMUX-64T boards
. If you do change the value of such a parameter,
the new value becomes the new setting. You can set default settings for
some parameters in the configuration utility.
device A DAQ device inside your computer or attached directly to your computer
through a parallel port. Plug-in boards, PC cards, and devices such as the
DAQPad-1200, which connects to your computer’s parallel port, are all
examples of DAQ devices. SCXI modules are distinct from devices, with
the exception of the SCXI-1200, which is a hybrid.
device number The slot number or board ID number assigned to the device when you
configured it.
DIFF Differential. A differential input is an analog input consisting of two
terminals, both of which are isolated from computer ground and whose
difference you measure.
differential
measurement system
A way you can configure your device to read signals, in which you do not
need to connect either input to a fixed reference, such as the earth or a
building ground.
digio.llb
A LabVIEW DAQ library containing VIs that perform immediate digital
I/O and digital handshaking with DAQ devices and SCXI modules.
digital input group A collection of digital input ports. You can associate each group with its
own clock rates, handshaking modes, buffer configurations, and so on.
A port cannot belong to more than one group.
digital output group A collection of digital output ports. You can associate each group with its
own clock rates, handshaking modes, buffer configurations, and so forth.
A port cannot belong to more than one group.
digital trigger A TTL signal that you can use to start or stop a buffered data acquisition
operation, such as buffered analog input or buffered analog output.
DIO devices Refers to all devices with the letters DIO in their name, unless otherwise
noted.
DIP Dual Inline Package.