LabView Seminar

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LabView Seminar

• University of Puerto Rico
• Mayagüez Campus

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Outline

• What is LabView ?
• Generate a new graphical programming
• Applications design
• Type of data used in LabView
• Examples
• My first program

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What is LabView?

• Virtual Instrumentation
• It is a software module that simulates the front
  panel of an instrument.
• When using a VI, the user sees in the computer
  monitor a screen that looks like a physical
  instrument
• Oscilloscope
• Function generator
• Multimeter

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Generate New application

• Go to Start and search LabView Shortcut
• This window should appear

Select New
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Graphical Programming

• Front Panel and Block Diagram

Block Diagram
Front Panel
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Graphical Design

• There are libraries that consist of numerous
  types of tools, controllers, indicators and
  functions.
• FRONT PANEL Controls (Controls and Indicators)
• BLOCK DIAGRAM Functions

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Graphical Programming

• Make the following VI
• How I search HELP?

Vertical Fill Slide
Tank
Round LED
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Graphical Programming

• To show the digital display
• Right click over the objects (Slide1, Slide 2,
  Tank)
• Visible item
• Digital Display

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Graphical Programming
Front Panel
Block Diagram
Add and Greater instructions must be included
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Graphical Programming

• Change the object values and caption.
• Click over the slide value and caption and then
  insert this new values (0 10).
• Do the same for the second slide (0 10) and the
  tank (0 20).
• Make all connections as depicted on the Block
  Diagram.

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Graphical Programming

• Run the application using this button
• What was the behavior?
• Run with this other button
• To stop use
• The differences between Run and Run Continuously
  are
• Run execute the program only one time. A while
  loop control the code
• Run continuously do not depend of any loop
• Problem The program could enter in an infinite
  loop, and scratch windows.
• Debugging

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Using Loop

• Select While Loop
• Right click over the circular red button of the
  while loop
• Select Create a Control
• Run

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Type of Data Used in LabView

• Boolean (light green) This type of data can
  have the values 1 (true) or 0 (false).
• Numerical (orange or blue) There are different
  data type, by example, double, integer, etc.
• Strings (pink) stores characters as in a
  one-dimensional array.
• Clusters (brown or pink) A cluster can store
  several types of data (strings, arrays, Boolean,
  etc.)

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HELP

• In menu, select Help and Show Context Help

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Example 2 FORMULA NODE
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DAQ

• Single-Point Acquisition
• A single point acquisition is an immediate,
  non-buffered operation.
• Only one data point is obtained.
• This type of acquisition is useful when no timing
  information is wanted.

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DAQ

• Buffered Waveform Acquisition
• This method is utilized to perform accurate
  multi-point acquisitions.
• A specific number of data points are recorded at
  a predetermined scan rate (sampling frequency)
  and stored in a buffer.
• The data stored in the buffer is then retrieved
  by the VI and displayed on the screen.
• This type of acquisition is useful when recording
  high frequency signals and when accurate timing
  information is wanted.

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DAQ Config Input
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DAQ Config Input
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DAQ Config Output
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DAQ Config Output
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DAQ Single Point
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DAQ Buffered
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Questions