Download A. LabVIEW

Lesson 6
Plotting Data
Additional Exercises
6-7
Build a VI that displays two plots, a random plot and a running
average of the last four points, on a waveform chart in sweep update
mode. Use the following tips:
•
Use a For Loop (n = 200) instead of a While Loop.
•
Use a shift register with three left terminals to average the last
four data points.
•
Use the Random Number (0-1) function located on the
Functions»Arithmetic & Comparison»Express Numeric
palette to generate the data.
•
Use the Bundle function located on the Functions»All
Functions»Cluster palette to group the random data with
the averaged data before plotting.
Save the VI as Random Average.vi in the C:\Exercises\
LabVIEW Basics I directory.
6-8
Build a VI that continuously measures the temperature once per
second and displays the temperature on a scope chart. If the
temperature goes above or below limits specified with front panel
controls, the VI turns on a front panel LED. The chart plots the
temperature and the upper and lower temperature limits. You should
be able to set the limit from the following front panel.
Save the VI as Temperature Limit.vi in the C:\Exercises\
LabVIEW Basics I directory.
6-9
Modify the VI you created in Exercise 6-8 to display the maximum
and minimum values of the temperature trace.
Use shift registers and two Max & Min functions located on the Functions»
All Functions»Comparison palette.
Tip
Select File»Save As to save the VI as Temp Limit (max-min).vi
in the C:\Exercises\LabVIEW Basics I directory.
© National Instruments Corporation
6-31
LabVIEW Introduction Course Manual