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LabView Seminar

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Strings (pink): stores characters as in a one-dimensional array. ... are recorded at a predetermined scan rate (sampling frequency) and stored in a buffer. ... – PowerPoint PPT presentation

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Title: LabView Seminar


1
LabView Seminar
  • University of Puerto Rico
  • Mayagüez Campus

2
Outline
  • What is LabView ?
  • Generate a new graphical programming
  • Applications design
  • Type of data used in LabView
  • Examples
  • My first program

3
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

4
Generate New application
  • Go to Start and search LabView Shortcut
  • This window should appear

Select New
5
Graphical Programming
  • Front Panel and Block Diagram

Block Diagram
Front Panel
6
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

7
Graphical Programming
  • Make the following VI
  • How I search HELP?

Vertical Fill Slide
Tank
Round LED
8
Graphical Programming
  • To show the digital display
  • Right click over the objects (Slide1, Slide 2,
    Tank)
  • Visible item
  • Digital Display

9
Graphical Programming
Front Panel
Block Diagram
Add and Greater instructions must be included
10
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.

11
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

12
Using Loop
  • Select While Loop
  • Right click over the circular red button of the
    while loop
  • Select Create a Control
  • Run

13
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.)

14
HELP
  • In menu, select Help and Show Context Help

15
Example 2 FORMULA NODE
16
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.

17
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.

18
DAQ Config Input
19
DAQ Config Input
20
DAQ Config Output
21
DAQ Config Output
22
DAQ Single Point
23
DAQ Buffered
24
Questions
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