Hi all, I've made a QMH-type program which asynchronously reads data from multiple instruments in my lab, and processes it. There is an asynchronously running VI in the program which continuously waits for SRQs, and notifies the individual instrument-reading VIs when to check the status bytes of their instruments for data ready. So far I've been using the IEEE 488.1 GPIB functions to communicate with the instruments, because a lot of them are very old, and also because all of the other programs that were currently being used worked in the same way. However, we bought a new agilent GPIB card, and it appears I will have to use NI VISA to be able use it with LabVIEW. I was wondering if there was a simple way to do what I've described above using the VISA functions? It seems to me that the wait on event function only works for a single VISA resource session, but if I want to replace the GPIB functions using my old code it would be better to have something to monitor all of the addresses at once. (It may be that I'll have to rewrite the code to have the SRQ-monitoring for each session in their respective VIs?) Hopefully my question makes sense. Thank you in advance!

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Thanks, nyc. That's valuable information. Indeed, it would probably be preferrable then to keep the GPIB-specific functions handy.

I'll let my professor know that it'll be beneficial to order the NI card.

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