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Document Type: Example Program
NI Supported: Yes
Publish Date: Apr 28, 2009

Use a LabVIEW VI in SignalExpress to Convert Single Data Points to Continuous Signals.

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Overview

This project allows you to take software timed single point DAQ measurements and record them as continuous signals in Signal Express. This is useful because you have more display options with continuous signals. This project demonstrates how to use the Execution Control steps and the Run LabVIEW VI steps in Signal Express. Since this project uses the Run LabVIEW VI steps, SignalExpress Full is needed. It will not work with SignalExpress LE.

Downloads

Filename: seconverttocontinuous.zip
Requirements: View

To use this project, you will first need to build the LabVIEW VI in to a source distribution.  Attached is a LabVIEW Project with a build specification already saved that will create the source distribution for you.  To build the source distribution, follow these steps:

  1. Open the project called Read Project.lvproj.
  2. Under Build Specifications, right click on Source Distribution and select Build.  The source distribution, with its current settings, will be stored to C:\builds\Read Project\Source Distribution.

Next we need to open the SignalExpress project and make sure everything is configured correctly.

  1. Open the SignalExpress project called Example.seproj.  
  2. If you used a different version of LabVIEW other than LabVIEW 8.2, you will have to replace the Run LabVIEW 8.2 VI step with the appropriate LabVIEW version.  
  3. Next, be sure that the correct path is being used in the Step Setup tab for the Run LabVIEW VI.  If it can't find the VI, you will need to browse to the location of the source distribution that we built above and point it to Read.vi in the library.  

You should now be able to run the project.  The figure below is a screenshot of what the project should look like.  You should notice that the data type coming from the DAQmx Acquire step is different from the data type coming out of the LabVIEW VI.

Important Notes:

  • When you run this project, make sure you use run a single time and do not run continuously.  We are controlling the looping using the execution control steps and therefore don't want SignalExpress to run the sequence more than one time.  
  • The project was written in SignalExpress 3.0 and LabVIEW 8.2.  

 

 

Requirements


Filename: seconverttocontinuous.zip

Software Requirements


Application Software: SignalExpress Development System 3.0
Language(s): Other

Hardware Requirements


Hardware Group: Multifunction DAQ (MIO)

 
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This example program (this "program") was developed by a National Instruments ("NI") Applications Engineer. Although technical support of this program may be made available by National Instruments, this program may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this program with each new revision of related products and drivers. THIS EXAMPLE PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).