Most recent serial drivers for LV4?

[stuartg]

Hi All,

I am trying to communicate with a non NI serial device from labview 4.0.1 using a usb to db-9 serial converter cable. The device wants a baud rate of 115,200.

NI-VISA 2.0.1 VISA interactive control for LV4 DOES communicate with device at 115,200. However, The device is not recognized even when I do a write from the preprogrammed ni serial vi's. I have double and triple checked the settings. I have also completed the loopback test, but that would also fail stating "device not found".

Can I communicate with this serial device with old versions of labview?

notes:

It does work when programming a vi with the student edition LV7.1.

thanks,

Stuart

[Dennis_Knutson]

What functions are you using in LabVIEW to try to communicate? There are the serial read/write fucntions and the VISA read/write functions. The serial read/write functions are obsolete and no longer supported by NI. It's possible that these older serial functions don't work with USB->RS232 converters but if you can communicate with the VISA interactive control, you can use the LabVIEW VISA functions to do the same thing.

[stuartg]

Dennis,

I gave up on the serial read/write functions and used VISA and it is working great. Thanks.

Stuart

[Dennis_Knutson]

Glad you got it working. If you ever upgrade from 4.1, that's one less thing you'll have to worry about since the newer versions of LabVIEW only have VISA.