Programming instructions

Chapter 3 Basic LabVIEW Data Acquisition Concepts
LabVIEW Data Acquisition Basics Manual 3-6
© National Instruments Corporation
VI Parameter Conventions
In each LabVIEW DAQ VI front panel or
Help
window, the appearance
of the control and indicator labels denote the importance of that parameter.
Control and indicator names in bold typically must be wired to a node on
the block diagram for your application to run. Controls and indicators not
necessary for your program to operate appear in plain text. You rarely need
to use the parameters with labels in square brackets ([ ]). Keep in mind that
these conventions apply only to the information in the Help window and
on the front panel. Both this manual and the
LabVIEW Function and VI
Reference Manual
list all parameter names in bold to distinguish them from
other elements of the text. The default inputs appear in parentheses to the
right of the parameter names.
Figure 3-4 illustrates these Help window parameter conventions for the
AI Read One Scan VI. As the window text for this VI indicates, you should
wire the
device
(if you are not using channel names),
channels
,
error in
,
and
iteration
input parameters and the
scaled data
and
error out
output
parameters. In order to pass error information from one VI to another,
connect the
error out
cluster of the current VI to the
error in
cluster of
the next VI. The
coupling & input config
,
input limits
, and
output units
input parameters and the
binary data
output parameter are optional
parameters. You rarely need to use the
number of AMUX boards
parameter.
Figure 3-4.
LabVIEW Help Window Conventions