Prooblem connecting to multiple GPIB instruments on same gpib-ethernet box

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D Nicklaus

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Sep 14, 2018, 2:36:45 PM9/14/18

to python-ivi

I have two instruments, with different GPIB addresses, connected to the same ICS gpib-ethernet adapter box.

Using the vxi11 python library, I can connect and communicate with either one just fine, as long as I do it

one at a time.

But I'm unable to connect to both, and then issue commands to both successfully.

The first one I connect to works, and the second one will just hang forever when I try to read/write to it.

$ python
Python 2.7.5 (default, Nov 3 2016, 22:05:29)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import vxi11
>>> instr1 = vxi11.Instrument("192.168.230.72", "gpib,2")
>>> instr2 = vxi11.Instrument("192.168.230.72", "gpib,4")
>>> Answer1 = instr1.ask("T0G")
>>> Answer1
u'N V0.0001K I00.000M'
>>> Answer2 = instr2.ask("T0G")

It just hangs forever when I try to communicate with instr2 (the second one opened.)