VISA

[mysticdust]

I am trying to connect an Analog front end with my LabView but  it stops communicating with the device after some time randomly. I have been trying since a long time but could not figure out why?

[Dennis_Knutson]

Surely you can provide more information than that. You haven't attached a VI or snippet. You haven't said what this front end is. You haven't said how you connecting to it. You haven't said what the error message is.

[Gregory]

This sounds like an intermittent problem. Have you tried the magic delay fairy?

[JÞB]

---

@Gregory wrote:

This sounds like an intermittent problem. Have you tried the magic delay fairy?

---

Seriously? Magic Delay Fairy!  Usually bad advice!

Dennis offered better advice- show us some code! explain what the external instrument is. Have you read the manual for that device? and can you provide a link?  

Help us Help you!

[Gregory]

Hi Jeff,

Notice the date that the magic delay fairy was announced 😛

[JÞB]

---

@Gregory wrote:

Hi Jeff,

Notice the date that the magic delay fairy was announced 😛

---

Actually, I've been working on getting Norm to present that to my local LUG!  I did view the original presentation as a "Fly-on-the-wall" 

None of that helps the Original Poster.  We need to see some code and have information on the VISA Resource (But we CAN have a bit of fun up here too)  Keep posting!

[mysticdust]

This is an analog front end AFE4403 to which I am trying to communicate by invoking its registers and commands. The communication randomly stops responding . I suspect that there is an issue with the way I am closing the session.

I am sometimes getting an error 0xBFFF0072.

I am trying to verify the serial port sessions using realterm too, but its not helping much!

Any suggestions would be really helpful!

[Dennis_Knutson · Accepted solution]

The error will occur when you have another program using the same port.

The image does not help much since the important stuff is inside the subVI.

[Gregory]

I recommend putting a wait inside inside the while loop that writes to your device (or even better, use an event structure).