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pyvisa / pyvisa-py

A pure python PyVISA backend
https://pyvisa-py.readthedocs.io
MIT License
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VisaIOError: VI_ERROR_SYSTEM_ERROR (-1073807360) #192

Closed ambegossi closed 5 years ago

ambegossi commented 5 years ago

I'm trying to use the pyvisa-py library to communicate with a SRS ds345 function generator.

After the open resource command: rm = visa.ResourceManager('@py') ds345 = rm.open_resource('GPIB0::6::INSTR')

I'm trying to send a command to the function generator: ds345.write('FREQ 32760.0')

but I'm getting the following error:

VisaIOError Traceback (most recent call last)

in 2 3 # DS345 Function Generator ----> 4 ds345.write('FUNC %d' %function) 5 ds345.write('AMPL %f' %amplitude) 6 ds345.write('OFFS 0') ~/anaconda3/envs/qtzoenv/lib/python3.7/site-packages/pyvisa/resources/messagebased.py in write(self, message, termination, encoding) 221 message += term 222 --> 223 count = self.write_raw(message.encode(enco)) 224 225 return count ~/anaconda3/envs/qtzoenv/lib/python3.7/site-packages/pyvisa/resources/messagebased.py in write_raw(self, message) 199 :rtype: int 200 """ --> 201 return self.visalib.write(self.session, message) 202 203 def write(self, message, termination=None, encoding=None): ~/anaconda3/envs/qtzoenv/lib/python3.7/site-packages/pyvisa-py/highlevel.py in write(self, session, data) 371 372 if ret[1] < 0: --> 373 raise errors.VisaIOError(ret[1]) 374 375 return ret VisaIOError: VI_ERROR_SYSTEM_ERROR (-1073807360): Unknown system error (miscellaneous error).
MatthieuDartiailh commented 5 years ago

Could you post the output of pyvisa-info ?

Currently pyvisa-py only check explicitly for TimeoutError during a write (https://github.com/pyvisa/pyvisa-py/blob/master/pyvisa-py/gpib.py#L186). You can try to tweak the logic to get a bit more details about what happens in the gpib lib. This part of the code could definitively be improved. PR welcome.

MatthieuDartiailh commented 5 years ago

Why did you close @ambegossi ? If you found a solution to your problem, please post it it might help others.

ambegossi commented 5 years ago

I was able to resolve this by configuring the gpib port on the function generator manually. It was configured to receive commands on the wrong port. Thank you for your help

MatthieuDartiailh commented 5 years ago

Thanks for your answer !