Hello all,
I have been trying for some time to troubleshoot an issue where VISA just cannot see my Lakeshore 218 Temperature Controller. This instrument is connected via RS232 directly into the back of the PC. Windows Device Manager sees that port fine. I can successfully communicate with the it through RealTerm and also through pyserial. Lakeshore makes a proprietary Communication Utility and Chart Reader and both of those can communicate with the instrument fine. Neither NI-VISA Interactive Control nor pyvisa can see this device, but they are able to see other devices that I have connected. It may also be relevant that NIMAX cannot see any of the devices, but if I manually add the RS232 device it can see it and communicate with it until I restart the software. Then, it cannot communicate again.
Right now I am just using pyserial, but that is not an ideal situation. I would really like to be able to use VISA.
Here are the things I have tried:
-reinstalling NI-VISA
-using different VISA instances (from Agilent for example)
-using a RS232 to USB converter and a USB port
Thanks in advance for any help