I am trying to connect to an SP Scientific RC211 Chiller. I attached the relevant part of the PDF manual. It says the chiller has an MPC, which I was assuming was MultiProtocol? I have an RS232 cable connected with a null modem adapter as the manual says to do. When I connect the chiller I never can get anything to show up in the Device Manager, and I wrote a .vi (LV 2015) that should be communicating with the COM port that the chiller is connected to, but I get an error that says I probably dont have the correct drivers. Is there a MPC driver that you can download? Anyone have experience connecting with these things? I have the serial parameters set up correctly. Thanks in advance any input is appreciated.