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Edit Me VI

Module by: National Instruments. E-mail the author

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Summary: Your objective is to edit a VI with properties that make it difficult to edit. Complete the following steps to modify a VI that is configured to run when opened and quit LabVIEW after it runs.

Exercise 1

1.a) Front Panel

  1. Close any open VIs and open the Edit Me VI, located in the C:\Exercises\LabVIEW Basics I directory. The following front panel is already built.
    Figure 1
    Figure 1 (editme.png)
    The VI is already running when it opens. While the VI runs, you cannot use the menu bar, toolbar, or keyboard shortcuts to edit or abort the VI.
  2. Click the Start button. After 10 seconds, the VI stops running and quits LabVIEW.
  3. Relaunch LabVIEW and open a blank VI.
  4. If the VI you want to edit either does not have subVIs or you do not know what it contains, complete Item 5 through Item 13. However, if the VI you want to edit has subVIs, open one of the subVIs and modify the block diagram to break the subVI. For example, place an Add function on the block diagram and do not wire the inputs. Open the VI you want to edit. Because its subVI is nonexecutable, the VI that calls it is also nonexecutable. It opens in edit mode and the Run button appears broken. Make sure to fix the subVI after you edit the calling VI.
  5. Display the block diagram of the new VI.
  6. Place the Edit Me VI, which is already built, on the block diagram. The front panel for the Edit Me VI displays. Although you can display the block diagram of the Edit Me VI, you cannot edit it.
  7. Select Operate>>Change to Edit Mode. A dialog box informs you that the VI is locked.
  8. Click the Unlock button. You now can edit the VI. You also can unlock a VI by selecting File>>VI Properties and selecting Security from the Category pull-down menu.
  9. Select and delete the Quit LabVIEW function from the block diagram.
  10. Save and close the Edit Me VI. Close the new VI and do not save changes.
  11. Open the Edit Me VI again.
  12. After the VI runs, try to edit it.
  13. Close the Edit Me VI.

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Lenses

A lens is a custom view of Connexions content. You can think of it as a fancy kind of list that will let you see Connexions through the eyes of organizations and people you trust.

What is in a lens?

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Who can create a lens?

Any individual Connexions member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

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