Open VISA Session Monitor.vi

[ben64]

This is a vi that is located in \vi.lib\Utility\visa.llb. Did anybody ever had it worked? I started 2 VISA sessions on test equipment (a power meter connected to USB and a signal generator connected to a gpib-usb) and the number of open sessions indicated 0 when there was clearly 2 open sessions.

Ben64

[Vincent90]

Hi Ben,

Can you specify your error ? Did you try to send commands to your instruments when you think that your session is open ?

BR,

Vincent

[ben64]

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@Vincent90 wrote:

Hi Ben,

Can you specify your error ? Did you try to send commands to your instruments when you think that your session is open ?

BR,

Vincent

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There is no error generated, the open VISA sessions just doesn't show up and the Open Sessions.vi return an empty array of references. The issue seems to be with this vi but we can't look at the diagram since it is password protected.

I was running continuous acquisitions and the VISA resource name controls was showing 2 open sessions (the small computers icon beside the resource name).

Ben64

[Supreeth.K]

Hi,

I found the 'Open Sessions.VI' present in vi.lib/utility/visa.llb to be unreliable. Has anyone else had similar experiences with this utility VI?

For example as can be seen below, the list of current open sessions generates by this VI is wrong. When compared with the visa resource name control, it can be seen that some of the sessions are not listed and some of the sessions are listed twice.

Does anyone know of any other VI that can be used to find out the list of  open visa sessions ?

[Wolleee]

Hi Supreeth,

I altered NI's find COMS vi.

[RavensFan]

Simpler code would use an autoindexing tunnel, then you can get rid of the Index Array inside the loop.

Also, you should be using Build Array and not Insert into Array.  Then you can get rid of the integer shift register.