Hi everyone,
When I was doing a loopback test for a B&B USB to RS-485 mini-converter (4 wires), I am getting the meassage like
"Read Operation
Error
VISA: (Hex 0xBFFF0015) Timeout expired before operation completed. "
The loopback test was performed with NI MAX, and the steps are exactly follow the NI tutorial in the following link
http://www.ni.com/tutorial/3450/en/
I varied the byte to read numbers and timeout vaules, but I got the same error.
I am pretty new to the instrument control. Does anyone have any idea about this? Do I need to get a new RS485 connector? Thanks.
By the way, I did a similar loopback test for a RS232 connector and it work.