viRead of NI_ISA timesout while doing GPIB read from scope

[Ehsan]

Hi,
I am writting an application which does 100's of scope shots and file transfer from the scope (TDS7254) to the host machine through GPIB. After about 100-150 picture ViRead Timesout and even resending the GPIB command and retrying to read the data does not work. It's as if Scope does not respond. Any idea of what might be causing this problem.

thanks for you help:)

[Ray K]

You should try getting a spy capture of the program. By the way, if you perform two queries without reading in between, the second write should timeout. Since yours write doesn't fail, it is possible that your scope is not generating a response and perhaps malfunctioning.

NI Spy Tutorial

Ray Kong
NI Applications Engineer

[btuman]

Hi, I am having a similiar problem. I am using a Temptronic Thermostream TP04300A. The viRead command is timing out when performing queries of the instrument. If I step through the TestStand sequence, then the timeout does not occur, but when running at full speed the timeout occurs. So, I added some delays in the code, but this did not solve the problems. Any suggestions would be appreciated.