What is control reference in LabVIEW?

What is control reference in LabVIEW?

LabVIEW creates a control reference to the control on the block diagram of the main VI, creates a subVI that contains a control refnum wired to a Property Node or Invoke Node, and wires the control reference on the main VI to the control refnum input terminal of the new subVI.

What is a control reference?

Control References are called explicitly linked because the Control Refnum Control in the subVI is explicitly wired to the Control Refnum Constant in the main VI, which tells it what control in the main VI that it is linked to.

How do I Create a Refnum control in LabVIEW?

Right-click a refnum input terminal of a Notifier Operations function and select Create»Control from the shortcut menu to create this refnum control. Creating a notifier refnum control does not create a notifier reference. You must use the Obtain Notifier function to create a notifier reference.

What is the difference between a control and an indicator on the front panel?

You build the front panel with controls and indicators, which are the interactive input and output terminals of the VI, respectively. Controls are knobs, push buttons, dials, and other input devices. Indicators are graphs, LEDs, and other displays.

How do you reference in LabVIEW?

LabVIEW 2020 Help Right-click the front panel control or indicator of the main VI to which you want to create a reference and select Create»Reference from the shortcut menu. LabVIEW attaches a strictly typed control reference to the mouse cursor. Drop the reference on the block diagram of the main VI.

What is an example of control?

Control is defined as to command, restrain, or manage. An example of control is telling your dog to sit. An example of control is keeping your dog on a leash. An example of control is managing all the coordination of a party.

Which facilitates you to read controls in front panel of VI in LabVIEW?

You can find the source code that runs the front panel on the block diagram. The front panel window contains a toolbar across the top and a Controls palette that you can access by right-clicking anywhere on the front panel. After opening the Controls palette, use it to place controls and indicators on the front panel.

What are the front panel indicators?

7.1. Build the front panel with controls and indicators, which are the interactive input and output (I/O) terminals of the VI, respectively (Fig. 7.1). Controls are knobs, push buttons, dials, and other input devices. Indicators are graphs, LEDs, and other displays.

What is vi reference?

If you wire a reference to another application instance to the application reference input, vi path refers to a location in the file system of the computer that is running that application instance.

How do you call sub vi?

The steps to call a subVI dynamically within an executable is:

1. In your SubVI: click File>>VI Properties>>Windows Appearance>>Customize and check “Show front panel when called”. (
2. In your calling VI: wire the name of your VI as a file path constant to the Open VI Reference.