Is it possible to Read in and Write out at the same time along one GPIB controller?

[TravisW]

I have an instrument connected to my computer through a GPIB-USB controller. The instrument is an electronic load, so it registers a voltage and a current, either of these values I can manually change to affect the other. While in LabView I keep getting an error message that comes up only when I have a program designed to send a value to the instrument for a current while recieving a value for the voltage from the instrument.

If it is not possible to take in while giving off signals at the same time,  I can simply set up a while loop to quickly keep changing between taking and giving a signal to the instrument. Any other ideas?

Thanks

[Dennis_Knutson]

No, the GPIB bus is sequential. You have to order the operations and that is easily done with the error in/error out connections.