step incrementation of agilent 3631a DC power supply via gpib based on a changing variable

[Raaron]

I am trying to increment voltage using Agilent 3631a via gpib in labview 8.6. i can control it through the instrument assistant but that does not allow me to manipulate it through changing variables in the block diagram, when i try to use the gpib write or send function i get " Error connecting to GPIB driver or device. This is usually due to a required driver not being installed on the system." however when i try to install the driver from the ni site it says it is already installed. Also if the driver was not installed how could i control it from the instr assist? The agilent is displayed under gpib with no errors in max.  My end goal is to compare 10 logic pins to a desired arrangement and increment the power supply slowly until the logic levels match the desired states.  thank you for your time and information. 

[Dennis_Knutson]

You use the Instrument Assistant instead of a LabVIEW driver. Typically, you would never use the assistant if a driver is available. Simply use Help>Find Instrument Drivers.

The error you are getting has nothing to do with the LabVIEW driver. It is refering to the windows driver for the GPIB controller. Are you actually using a GPIB card from NI? The instrument assistant does not use the low level GPIB functions. It uses VISA as does the pre-written instrument driver. The control of the power supply is simple with the driver.

p.s. While I would never recomend using the assistant instead of the driver, it is certainly possible to use a variable input with it. It's just a parameter that you add.

[Raaron]

thank you so much!  that resolved my issue  the age363x driver was actually not available under my palette but i did have other drivers installed that referenced the device. had to install the hpe363xa driver.  thank you again, never would have figured it out without your help  🙂