CHAPTER 1: GETTING STARTED WITH LAB VIEW

CHAPTER 1

1. Launch Lab View

Next is OPENING A NEW VI FROM THE TEMPLATE

File >> New >> VI

Select General and Display >> OK

Front Panel and Block Diagram will appear like pic below 

At the Front Panel, click the Run button and the sine wave will appear at the front panel. The wave is running and while to stop it just click the Stop button. 

Now we want to ADD A CONTROL TO THE FRONT PANEL  

At the Front Panel click View >> Control Palette 

control palette will appear like this 

At the Control Palette,

Choose Express >> Numeric Control >> Knob  

So move the knob here to the Front Panel next to the waveform graph.

Like this

so after finish we can save the project that we have create above. Just click save as, and select destination.

Next......

CHANGING A SIGNAL TYPE 

On the Block Diagram, right click Simulate Signal >> Properties >> Signal Type >> Saw Tooth >> OK

Next we move to the block diagram, Move the cursor over the down arrows at the bottom of the Simulate Signal Express VI, click and drag the border of the Express VI to add two rows. When we release the border, the Amplitude box input appears.

WIRING OBJECT ON THE BLOCK DIAGRAM

Okay now we move to how to make wiring on the block diagram.. 

Move the cursor over the arrow on the Knob terminal. The cursor becomes a wire spool. When the Wiring tool appears, click the arrow on the Knob terminal and then click the arrow on the Amplitude input of the Simulate Signal Express VI, to wire up the two objects together.

RUNNING A VI 

Front panel >> Run >> move the cursor at the knob ( where the cursor will become a hand or the name is Operating  Tool that will be shown at the left ). Use the Operating tool to change the value of the control.

MODIFYING A SIGNAL 

Go to Block diagram >> click the wire that connect the Simulate Signal Express VI to the Waveform Graph terminal >> delete key

Next, right click to open the function palette  

Function palette  >>Express >> Arithmetic & Comparison >> drag to block diagram between Simulate Signal Express VI and the Waveform Graph terminal 

Configure formula dialog >> help 

Change the text in the Label column of the dialog box option you read about, from X1 to Sawtooth. When you click in the Formula text box at the top of the Configure Formula dialog box, the text changes to match the label you entered. 

entering *10 after Sawtooth in the Formula text box >> OK

Click output of the Simulate Signal Express VI, When the Wiring tool appears, click the arrow on the Sawtooth output and then click the arrow on the Sawtooth input of the Formula Express VI  to wire the two objects together.

Use the Wiring tool to wire the Result output of the Formula Express VI to the Waveform Graph terminal >> Save

DISPLAYING TWO SIGNALS ON A GRAPH

So from this task we go to the block diagram, move the cursor over the arrow on the Sawtooth

output of the Simulate Signal Express VI. Next, Use the Wiring tool to wire the Sawtooth output to the Waveform

Graph terminal.

and then File >> Save

Return to the front panel, run the VI, and turn the knob control. The graph plots the original sawtooth wave and the scaled sawtooth wave with 10 times the amplitude, as we specified in the Formula

Express VI. The maximum value on the y-axis automatically scales as you turn the knob.

At knob 2 graph display original and scaled  sawtooth wave within ten which is 20 as 2 x 10 = 20.  Click the STOP button to stop the VI.

CUSTOMIZING A KNOB CONTROL

Right-click the front panel knob and select Properties from the shortcut menu to display the Knob Properties dialog box. Click the Appearance tab to display the Appearance page. In the Label section on the Appearance page, delete the label Knob, and enter Amplitude in the text box.

Click the Scale tab. In the Scale Style section, place a checkmark in the Show color ramp checkbox.

The knob in the front panel window updates to reflect these changes. Click the OK button to save the current configuration and close the Knob Properties dialog box. Save the VI. 

CUSTOMIZING A WAVEFORM GRAPH 

In the front panel window, move the cursor over the top of the plot legend on the waveform graph.

Though the graph has two plots, the plot legend displays only one plot. When a double-headed arrow appears, shown in Figure 1-11, click and drag the border of the plot legend to add one item to the legend. When you release the mouse button, the second plot name appears.

Right-click the waveform graph and select Properties from the shortcut menu to display the Graph Properties dialog box. On the Plots page, select Sawtooth from the top pull-down menu. In the Colors section, click the Line color box to display the color picker. Select a new line color

Select Sawtooth (Formula Result) from the top pull-down menu. Place a checkmark in the Do not use waveform names for plot names checkbox. This action lets you edit the labels on the graph.

In the Name text box, delete the current label and change the name of this plot to Scaled Sawtooth.

Click the OK button to save the current configuration and close the Graph Properties dialog box

 Right-click the waveform graph and select Properties from the shortcut menu to display the Graph Properties dialog box. On the Plots page, select Sawtooth from the top pull-down menu. In the Colors section, click the Line color box to display the color picker. Select a new line color.