National Instruments BridgeVIEW 用户手册
Chapter 9
Creating VIs
© National Instruments Corporation
9-7
Activity 9-1. Create a VI
Your objective is to build a VI.
Imagine that you have sensors that read temperature and volume readings
as voltage. You will use a VI in the
as voltage. You will use a VI in the
BridgeVIEW\Activity
directory to
simulate the temperature and volume measurements in volts. You will write
a VI to scale these measurements to degrees fahrenheit and liters,
respectively.
a VI to scale these measurements to degrees fahrenheit and liters,
respectively.
1.
Open a new front panel by selecting File»New. If you have closed all
VIs, select New VI from the BridgeVIEW dialog box.
VIs, select New VI from the BridgeVIEW dialog box.
Note
If the Controls palette is not visible, select Windows»Show Controls Palette to
display the palette. You also can access the Controls palette by popping up in an
open area of the front panel. To pop up, right-click on your mouse.
display the palette. You also can access the Controls palette by popping up in an
open area of the front panel. To pop up, right-click on your mouse.
2.
Select Tank from Controls»Vessels, and place it on the front panel.
3.
Type
Volume
in the label text box and click anywhere on the front
panel.
Note
If you click outside the text box without entering text, the label disappears.
To show the label again, pop up on the control and select Show»Label.
To show the label again, pop up on the control and select Show»Label.
4.
Rescale the tank indicator to display the tank volume between 0.0
and 1000.0.
and 1000.0.
a.
Using the Labeling tool, double-click on
10.0
on the tank scale to
highlight it.
b.
Type
1000
in the scale and click the mouse button anywhere on
the front panel. The intermediary increments are scaled
automatically.
automatically.
5.
Place a thermometer from Controls»Numeric on the front panel.
Label it
Label it
Temp
and rescale it to be between 0 and 100.
6.
Your front panel should look like the following illustration.