I'm trying to develop some Labview 2019 code to read and log conductivity with an eDAQ EPU357 probe and one of their Isopods, which connects to the PC with a USB port. The code sends a text string as a command to the device which then returns a text string result. They have sample code available but claim to have never tested the code. I've simplified the code a bit and am trying to use it to collect data about once per second. I have one VI that just initializes the USB port for baud rate, etc which is uploaded below. When I attempt to run that I get this error message:
"Error opening resource:
ASRL3::INSTR
VISA: (Hex 0xBFFF0072) The resource is valid, but VISA cannot currently access it."
Can someone suggest a fix or something for me to check out?
I've run TeraTerm with the device and get the expected results. I've closed down TeraTerm and used the VISA Clear coomand to (presumably) reset the USB port before running the LabView port initialization VI that gives me the above error message.
I used MAX to determine the port address (COM3) and have tried to open a VISA test panel but get the same error message:
"
Error opening resource:
ASRL3::INSTR
VISA: (Hex 0xBFFF0072) The resource is valid, but VISA cannot currently access it."
So far as I can tell nothing else is trying to use the port when I get the errors with my Initialize routine or attempt to run the VISA test panel.