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VISA Resource name have no pop up menu


MViControl

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All,

I have sucessfully installed Agilent 82530B GPIB card in my system, and I enabled VISA for LabVIEW, I can operate this card in NI-MAX, but when I want to select this card, I suddenly found that the "VISA Resource name" have no pop up menu any more. before I install the GPIB card, the "VISA Resource name" can list all ports in the system.

Any one have ideas about how to solve this issue?

Thx in advance.

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There should be a Menu Button that you can show/hide with a right-click (select Visible Items).

The drop-down list will then display all available VISA resources.

(Or it could be that your VISA class is not set for Instruments.)

I think you misunderstand my point. here the problem is that I have the menu in the control, but when I click menu, there are no any item in the menu except "fresh"

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I think you misunderstand my point. here the problem is that I have the menu in the control, but when I click menu, there are no any item in the menu except "fresh"

Can you please upload a screen shot of your port listing in MAX and a screenshot of the dropdown on your control?

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So you're not seeing at least the COM ports...

Apart from VISA class, I'm sorry to say I'm at a lost of an explanation.

Yes, I see nothing except the "fresh", but I can see & operate "serial port", "GPIB" in MAX sucessfuly.

Can you please upload a screen shot of your port listing in MAX and a screenshot of the dropdown on your control?

here is VISA Resource name when I click the menu button:

post-6763-125790909412_thumb.gif

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Yes, I see nothing except the "fresh", but I can see & operate "serial port", "GPIB" in MAX sucessfuly.

here is VISA Resource name when I click the menu button:

post-6763-125790909412_thumb.gif

This is just a thought. Sometimes this happens to me and it's because the GPIB card is loose in the PCI slot. Once I push it back in the VISA works. I know you said that you can communicate with MAX which would mean that the GPIB card is working, so I'm not too sure if this is your problem.

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Which version of VISA drivers are you using at the moment?

Have you tried to reinstall the latest drivers? (v4.6 Run Time or Full)

I use NI-VISA 4.5.1, I will try to reinstall the driver, hope it works.

This is just a thought. Sometimes this happens to me and it's because the GPIB card is loose in the PCI slot. Once I push it back in the VISA works. I know you said that you can communicate with MAX which would mean that the GPIB card is working, so I'm not too sure if this is your problem.

I tryed already, it do not help, I think I should try to reinstall NI-VISA.

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After Reinstall the NI-VISA, everything fine now:=)

Had simular problems. Solved by restarting the computer. :frusty:

Have olso seen that I missing com/GPIB instrumets in the drop down menu. Some times I need to start Max, sometimes I must restart LW, and in worst cases I needed to restart computer

Edited by Clio75
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