Hi, I'm having a communication problem when I use a NI USB-232 (778472-01) adapter to control a pressure sensor. There are many posts about this in the forum, but I'm encounting something a bit different. I am able to use MAX to fully control the instrument with the VISA test panel. So I guess the driver of the USB-232 is correctly installed. However, in labivew, even though I can select the instrument from the visa source name, it always return an error (-1073807339) when I run the program. The screen shot of labview program is attached. Could anyone kindly help me with this problem.Thanks a lot.The system is XP SP 3 Pro. The Labview version is 8.6.The MAX version is 4.5.0f0.

If the default windows port settings just happen to correspond to the settings you need for communication you can get lucky and it will work. If just one setting is different, it won't work. It's always better to set the parameters in your code. Shane.

Instrument Control (GPIB, Serial, VISA, IVI)

Serial communication problem with USB to serial hub

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Thanks for your help. The program is now working once I add the visa config.

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Instrument Control (GPIB, Serial, VISA, IVI)

Serial communication problem with USB to serial hub

Re: Serial communication problem with USB to serial hub