visa event driven application

[tanu]

in my application i need to enable visa read event like visual basics on_comm event because visa read vi has a long waiting time if nothing is received.for that my application is getting slow.if i get some suggestion regarding this it will be an immense help for me.

[Noel]

I've created an app note plus LabVIEW examples to show how to handle query synchronization with instruments using VISA events. The app note is currently being reviewed by our technical communications group. Once finished, the app note, examples, and a Macromedia Breeze presentation will be posted to DevZone. I'm attaching the draft copy of the app note plus examples. I'd appreciate any feedback you might have.

[Dennis_Knutson]

Instead of doing a read with a fixed number of bytes, try putting a VISA Bytes at Serial Port first and put the VISA Read inside a case statement and only read when the number of bytes is greater than 0.