Book Image

Data Acquisition using LabVIEW

By : Behzad Ehsani
Book Image

Data Acquisition using LabVIEW

By: Behzad Ehsani

Overview of this book

NI LabVIEW's intuitive graphical interface eliminates the steep learning curve associated with text-based languages such as C or C++. LabVIEW is a proven and powerful integrated development environment to interact with measurement and control hardware, analyze data, publish results, and distribute systems. This hands-on tutorial guide helps you harness the power of LabVIEW for data acquisition. This book begins with a quick introduction to LabVIEW, running through the fundamentals of communication and data collection. Then get to grips with the auto-code generation feature of LabVIEW using its GUI interface. You will learn how to use NI-DAQmax Data acquisition VIs, showing how LabVIEW can be used to appropriate a true physical phenomenon (such as temperature, light, and so on) and convert it to an appropriate data type that can be manipulated and analyzed with a computer. You will also learn how to create Distribution Kit for LabVIEW, acquainting yourself with various debugging techniques offered by LabVIEW to help you in situations where bugs are not letting you run your programs as intended. By the end of the book, you will have a clear idea how to build your own data acquisition system independently and much more.
Table of Contents (18 chapters)
Data Acquisition Using LabVIEW
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface
9
Alternate Software for DAQ

Create serial Read-Write sub VI


To create a sub VI, follow these steps:

  1. Right click on Block Diagram and from Instrument I/O choose the VISA pallet.

  2. From the VISA pallet:

    1. Place a "VISA Configure serial port".

    2. Connect a "Control" to the input.

    3. Default baud rate is 9600 and you may connect a constant to it, or just leave it to use the default value.

    4. Place a "VISA write" and connect the serial reference wire and error wires.

    5. Add a control to the input wire of the "VISA write".

    6. Place a variable control delay (use Functions Programming Structures Flat sequence).

    7. Place a "VISA Property Node" and connect the serial reference line. Right click on the property node and choose "Bytes at Port".

    8. Place a "Read Visa" and connect the input and output wires as diagram here:

  3. Finally, create a SUB VI.