Startech usb serial port

[GTRITom]

I have a test that needs to communicate to a piece of test hard through a usb to RS485 adapter.  However I do not seem to be getting any message to through the serial port.  Is there a simple test I could run to make sure that I can send something trough the digital com port?

[NathanS]

Hi GTRITom,

Please see the following article about performing a Loopback Test. 

http://www.ni.com/white-paper/3450/en

Regards,