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After you build a VI front panel and block diagram, build the icon and the connector pane so you can use the VI as a subVI.

Creating an icon

Every VI displays an icon, shown in , in the upper right corner of the front panel and block diagram windows. Anicon is a graphical representation of a VI. It can contain text, images, or a combination of both. If you use a VI as asubVI, the icon identifies the subVI on the block diagram of the VI.

The default icon contains a number that indicates how many new VIs you have opened since launching LabVIEW. Create customicons to replace the default icon by right-clicking the icon in the upper right corner of the front panel or block diagramand selecting Edit Icon from the shortcut menu or double-clicking the icon in the upper right corner of thefront panel. You also can edit icons by selecting File>>VI Properties selecting General from the Category pull-down menu, and clicking the Edit Icon button.

Use the tools on the left side of the Icon Editor dialog box to create the icon design in the editing area. The normal size image of the icon appears in theappropriate box to the right of the editing area, as shown in the dialog box in .

Depending on the type of monitor you use, you can design a separate icon for monochrome, 16-color, and 256-colormode. LabVIEW uses the monochrome icon for printing unless you have a color printer.

Use the Edit menu to cut, copy, and paste images from and to the icon. When you select a portion of theicon and paste an image, LabVIEW resizes the image to fit into the selection area. You also can drag a graphic from anywherein your file system and drop it in the upper right corner of the front panel or block diagram. LabVIEW converts the graphicto a 32 32 pixel icon.

Use the Copy from option on the right side of the Icon Editor dialog box to copy from a color icon to a black-and-white icon and vice versa. After youselect a Copy from option, click the OK button to complete the change.

If you do not draw a complete border around a VI icon, the icon background appears transparent. When you select theicon on the block diagram, a selection marquee appears around each individual graphic element in the icon.

Use the tools on the left side of the Icon Editor dialog box to create the icon design in the editing area. The normal size image of the icon appears in theappropriate box to the right of the editing area. The following tasks can be performed with these tools:

  • Use the Pencil tool to draw and erase pixel by pixel.
  • Use the Line tool to draw straight lines. To draw horizontal, vertical, and diagonal lines, press the <Shift> key while you use this tool to drag the cursor.
  • Use the Color Copy tool to copy the foreground color from an element in the icon.
  • Use the Fill tool to fill an outlined area with the foreground color.
  • Use the Rectangle tool to draw a rectangular border in the foreground color. Double-click this tool to framethe icon in the foreground color.
  • Use the Filled Rectangle tool to draw a rectangle with a foreground color frame and filled with thebackground color. Double-click this tool to frame the icon in the foreground color and fill it with the backgroundcolor.
  • Use the Select tool to select an area of the icon to cut, copy, move, or make other changes. Double-click thistool and press the <Delete> key to delete the entire icon.
  • Use the Text tool to enter text into the icon. Double-click this tool to select a differentfont. ( Windows ) The Small Fonts option works well in icons.
  • Use the Foreground/Background tool to display the current foreground and background colors. Click eachrectangle to display a color palette from which you can select new colors.
  • Use the options on the right side of the editing area to perform the following tasks:
    • Show terminals

      Displays the terminal pattern of the connector pane.
    • Ok

      Saves the drawing as the icon and returns to the frontpanel.
    • Cancel

      Returns to the front panel without saving anychanges.
  • The menu bar in the Icon Editor dialog box contains more editing options such as Undo, Redo, Cut, Copy, Paste , and Clear .

Setting up the connector pane

To use a VI as a subVI, you need to build a connector pane , shown in . The connector pane is a set of terminals that corresponds to the controls andindicators of that VI, similar to the parameter list of a function call in text-based programming languages. Theconnector pane defines the inputs and outputs you can wire to the VI so you can use it as a subVI.

Define connections by assigning a front panel control or indicator to each of the connector pane terminals. To define aconnector pane, right-click the icon in the upper right corner of the front panel window and select Show Connector from the shortcut menu. The connector pane replaces the icon. Each rectangle on the connector pane represents aterminal. Use the rectangles to assign inputs and outputs. The number of terminals LabVIEW displays on the connector panedepends on the number of controls and indicators on the front panel. The following front panel has four controls and oneindicator, so LabVIEW displays four input terminals and one output terminal on the connector pane.

Selecting and modifying terminal patterns

Select a different terminal pattern for a VI by right-clicking the connector pane and selecting Patterns from the shortcut menu. Select a connector pane pattern with extraterminals. You can leave the extra terminals unconnected until you need them. This flexibility enables you to make changeswith minimal effect on the hierarchy of the VIs. You also can have more front panel controls or indicators than terminals.

A solid border highlights the pattern currently associated with the icon. The maximum number of terminals available for asubVI is 28.

The most commonly used pattern is shown in . This pattern is used as a standard to assist in simplifyingwiring. The top inputs and outputs are commonly used for passing references and the bottom inputs and outputs are usedfor error handling. Refer to the section on Clusters for more information about error handling.

Try not to assign more than 16 terminals to a VI. Too many terminals can reduce the readability and usability of theVI.

To change the spatial arrangement of the connector pane patterns, right-click the connector pane and select Flip Horizontal, Flip Vertical, or Rotate 90 Degrees from the shortcut menu.

Assigning terminals to controls and indicators

After you select a pattern to use for the connector pane, you must define connections by assigning a front panel control orindicator to each of the connector pane terminals. When you link controls and indicators to the connector pane, placeinputs on the left and outputs on the right to prevent complicated, unclear wiring patterns in your VIs.

To assign a terminal to a front panel control or indicator, click a terminal of the connector pane, then click the frontpanel control or indicator you want to assign to that terminal. Click an open space on the front panel. The terminalchanges to the data type color of the control to indicate that you connected the terminal.

You also can select the control or indicator first and then select the terminal.

Although you use the Wiring tool to assign terminals on the connector pane to front panel controls andindicators, no wires are drawn between the connector pane and these controls and indicators.

Questions & Answers

What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Pdf generation test course. OpenStax CNX. Dec 16, 2009 Download for free at http://legacy.cnx.org/content/col10278/1.5
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