National Instruments Module SCXI-1125 - Manual (Page 48)

Chapter 5 Using the SCXI-1125
© National Instruments Corporation 5-11 SCXI-1125 User Manual
Using a DAQmx Channel Property Node in LabVIEW
You can use property nodes in LabVIEW to manually configure the
channels. To create a LabVIEW property node, complete the following
steps:
1. Launch LabVIEW.
2. Create the property node in a new VI or in an existing VI.
3. Open the block diagram view.
4. From the Functions toolbox, select Measurement I/O»
DAQmx - Data Acquisition, and select DAQmx Channel Property
Node.
5. Use the ActiveChans box to specify exactly what channel(s) you want
to configure. If you want to configure several channels with different
properties, separate the lists of properties with another ActiveChans
box and assign the appropriate channel to each list of properties.
Note If you do not use Active Channels, the properties are set on all of the channels in
the task.
6. Right-click ActiveChans, and select Add Element. Left-click the new
ActiveChans box. Navigate through the menus, and select the
property you wish to define.
Display Data You can use graphical tools such as charts, gauges, and graphs
to display your data. Some display tools are located on the
Controls»All Controls»Numeric»Numeric Indicators
subpalette and Controls»All Controls»Graph subpalette.
Continue Sampling For continuous sampling, use a While Loop. If you are using
hardware timing, you also need to set the
DAQmx Timing.vi
sample mode to Continuous Samples. To do this, right-click the
terminal of the
DAQmx Timing.vi labeled sample mode and
click Create»Constant. Click the box that appears and select
Continuous Samples.
Stop Measurement DAQmx Stop Task.vi (This VI is optional, clearing the task
automatically stops the task.)
Clear Task DAQmx Clear Task.vi
Table 5-4. Programming a Task in LabVIEW (Continued)
Flowchart Step VI or Program Step