I want to control Keithley 2700 and read DC voltage using USB-GPIB. In the code, I will input "Delay" which is the time interval between each reading in one test, and "Sample" is the total data in one single test. When I wanted to read data every one second, there was no error -1073807339, but if I wanted to read data very fast ,I added some commands in the "Write initial instruction to Keithley" to get the fastest reading rate. After adding these commands, when the program worked well, it can read 100 data,but there would arise the visa read timeout error if I tried to read over 1000 data. Sometimes, the case was even worse. When I ran the program, the display of K2700 became "--.--------V" and there was no data returned and there was also the error -1073807339. The display was still "--.-------V" even when the program finished running and I needed to restart the equipment.
The buffer size was set larger enough to store the experiment data. My computer system is win7. Attached are the screenshots of the program.
I'm new to LabView. I would appreciate it greatly for your valuable suggestions. Thank you in advance.