Skip to content Skip to navigation

Connexions

You are here: Home » Content » Programming with VISA

Navigation

Lenses

What is a lens?

Definition of a lens

Lenses

A lens is a custom view of Connexions content. You can think of it as a fancy kind of list that will let you see Connexions through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to Connexions materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual Connexions member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

This content is ...

Affiliated with (What does "Affiliated with" mean?)

This content is either by members of the organizations listed or about topics related to the organizations listed. Click each link to see a list of all content affiliated with the organization.
  • National Instruments display tagshide tags

    This module is included in aLens by: National InstrumentsAs a part of collection:"LabVIEW Graphical Programming Course"

    Comments:

    "A full introductory course on programming with LabVIEW."

    Click the "National Instruments" link to see all content affiliated with them.

    Click the tag icon tag icon to display tags associated with this content.

Recently Viewed

This feature requires Javascript to be enabled.

Tags

(What is a tag?)

These tags come from the endorsement, affiliation, and other lenses that include this content.

Programming with VISA

Module by: National Instruments. E-mail the author

User rating (How does the rating system work?)
Ratings

Ratings allow you to judge the quality of modules. If other users have ranked the module then its average rating is displayed below. Ratings are calculated on a scale from one star (Poor) to five stars (Excellent).

How to rate a module

Hover over the star that corresponds to the rating you wish to assign. Click on the star to add your rating. Your rating should be based on the quality of the content. You must have an account and be logged in to rate content.

:
(0 ratings)

Summary: In this exercise, the objective is to build a VI that reads and writes information from the NI Instrument Simulator using VISA functions. Complete the following steps to build a VI that uses VISA calls to acquire data from the NI Instrument Simulator.

  1. Make sure the Instrument Simulator is powered on and connected to the GPIB Interface.

Front Panel

  1. Open a blank VI. The front panel shown in Figure 1 will result from building the block diagram.
    Figure 1
    Figure 1 (visafp.png)

Block Diagram

  1. Build the block diagram shown in Figure 2.
    Figure 2
    Figure 2 (myvisabd.png)
    1. visaopen.png Place the VISA Open function, located on the Functions>>All Functions>>Instrument I/O>>VISA>>VISA Advanced palette, on the block diagram. This function opens a VISA session with an instrument. Right-click the VISA resource name input and select Create>>Control from the shortcut menu.
    2. visawriticon.png Place the VISA Write function, located on the Functions>>All Functions>>Instrument I/O>>VISA palette, on the block diagram. This function writes a string to the instrument. Right-click the write buffer input and select Create>>Control from the shortcut menu.
    3. visareadicon.png Place the VISA Read function, located on the Functions>>All Functions>>Instrument I/O>>VISA palette, on the block diagram. This function reads data from the instrument. Right-click the byte count input and select Create>>Control from the shortcut menu. Right-click the read buffer output and select Create>>Indicator from the shortcut menu.
    4. visaclose.png Place the VISA Close function, located on the Functions>>All Functions>>Instrument I/O>>VISA>>VISA Advanced palette, on the block diagram. This function closes the session with the instrument and releases any system resources that were used.
    5. Error.png Place the Simple Error Handler VI, located on the Functions>>All Functions>>Time & Dialog palette, on the block diagram. This VI checks error conditions and opens a dialog box with error information if an error occurs.
  2. Save the VI as My VISA Write & Read.vi in the C:\Exercises\LabVIEW Basics I directory.
  3. Display the front panel. Enter devsim in the VISA resource name input and set byte count to 200 to make sure you read all the information. Type *IDN? in the write buffer and run the VI.
  4. The top of the instrument simulator lists other commands that are recognized by this instrument. Try other commands in this VI.
  5. Close the VI when finished.

Content actions

Give Feedback:

E-mail the module author | Rate module ( How does the rating system work?)

Rating system

Ratings

Ratings allow you to judge the quality of modules. If other users have ranked the module then its average rating is displayed below. Ratings are calculated on a scale from one star (Poor) to five stars (Excellent).

How to rate a module

Hover over the star that corresponds to the rating you wish to assign. Click on the star to add your rating. Your rating should be based on the quality of the content. You must have an account and be logged in to rate content.

(0 ratings)

Download:

Module PDF

Add module to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections directly in Connexions. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need a Connexions account to use 'My Favorites'.

| A lens (?)

Definition of a lens

Lenses

A lens is a custom view of Connexions content. You can think of it as a fancy kind of list that will let you see Connexions through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to Connexions materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual Connexions member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks