NI GPIB device connected shown in connection expert but not in visadevlist

Question

Akshayaa Pandiyan 2022-7-25

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1767595-ni-gpib-device-connected-shown-in-connection-expert-but-not-in-visadevlist

编辑： Harimurali 2024-3-20

Hi, I have a couple of devices connected through NI GBIP and the devices are online in Keysight connection expert. But when I try to list them using visadevlist, I have the following warning no matter the Timeout:

Unable to find any VISA resources during the specified timeout period. Open the vendor's control software to search for available VISA resources.
Related documentation

The keysight connection expert setting is checked using these steps. Knowing the IP address, when I tried to create a GPIB object in MATLAB some devices show the following error:

>> visadev(['GPIB1::5::INSTR'])
Resource string is invalid or resource was not found.
See related documentation for troubleshooting steps.

but the same IP works for visa()

>> visa('agilent', ['GPIB1::5::INSTR']);
Warning: visa will be removed in a future release. Use visadev instead. 

As I mentioned, some devices are working with visadev and some wont.

MATLAB release: 2022a Update 3

Is this a bug in the toolbox or am I missing something?

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Answer 1

Harimurali 2024-3-19

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https://ww2.mathworks.cn/matlabcentral/answers/1767595-ni-gpib-device-connected-shown-in-connection-expert-but-not-in-visadevlist#answer_1427516

编辑：Harimurali 2024-3-20

Hi Akshayaa,

This is a known issue with MATLAB R2022a Update 3 and previous versions. Refer to the following bug report for detailed information about the issue: https://www.mathworks.com/support/bugreports/details/2617725

The fix for this is to use R2022b, R2022a Update 4, or future versions of MATLAB.

If this does not fix the issue, one can get this error if the specified VISA resource is not valid, or the instrument is not connected. Refer to connection error troubleshooting page:

https://www.mathworks.com/help/releases/R2022b/instrument/resolve-visa-connection-errors.html