Interfacing LabVIEW with PS-325 power supply

Hello guys, I have a power supply from Stanford Research systems, PS-325. This power source have a comunication port with pc that requires a KUSB-488B cable. I have installed the drivers necesary for this cable and drivers for power supply from NI site, but doesn't work. I have a dedicated GUI from Keithley with i have tested the cable and conection, and all good but in LabVIEW doesn't work. I have made a simple VI to set the voltage to power source and I'm getting ERR (-10737807343). Can anyone help me with this? maybe somebody have a VI for this power supply. Thank you!
Attachments:
hv_vi.jpg ‏58 KB

It doesn't require a controller from Keithley. That's a choice that you or someone else made and not exactly a good choice. If Keithley provides its version of VISA, you need to install that but also NI-VISA as primary. The actual gpib driver must come from Keithley. You probably need to enable tulip support as well. The controller and instrument have to be listed in MAX.

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