varian multigauge controller

[Albert.Geven]

The first info to give is which instrument,
and what are other busoptions, and especially is there a usb driver layer from the manufacturer.
I don't mean a LabVIEW driver but a usb communication layer.

[tangwenxin]

in our system, we use fieldbus with USB card. The instruments are connected with this card, the connector is USB.
I try to make sure first, by using labview7.0, I can find USB device in MAX, however, I can't do this now. Could you let
me know how to do this? Is there any way to do that?

If I can do that, I think I may try to next step, communicate with my instrument by serial usb VISA.

many thanks.
wx

[Albert.Geven]

In this case the fieldbus card is the device and this one has a usb driver.
Don't try to find this usb device in MAX and try to communicate with it via USB RAW.
USE the driver that you find in the device manager and that one offers a shell for accessing devices on the other side of the bus.
USB is here only a means to get to the devices.

[tangwenxin]

Albert,

Thanks for the info. I never use USB before, could you paste some subvi for example. I use labview 7.0
, later vi can'b open.

thanks.

wx

[Sarah_R]

wx,

For more information related to USB Raw, please reference the following KnowledgeBase: How Can I Communicate With a Device Using NI-VISA USB RAW Mode?. You could also reference another Discussion Forum: USB Raw Bulk communication, that you might find has some great reference material.

Hope you have a great day.

[Albert.Geven]

Hi

Sorry for the easy to misunderstand email earlier today.
I tried to say, Don't try to find this usb device in MAX and DON'T try to communicate with it via USB RAW.

Just try to find the fieldbus driver for the card, preferably with varian drivers for the multigauge controller.
Just think of usb as a miraculous way that works.

[tangwenxin]

I don't know how to input instrument address by usb indeed. Could you show some example the format of
usb address so that I can test in my computer. my labview is 7.0 version. thanks

[Sarah_R]

tangwenxin,

From the previous posts, the following Developer Zone Tutorial: USB Instrument Control Tutorial may help you in getting started.

Hope this is able to help.

[Albert.Geven]

Hi

Do not concentrate on USB,
Look for fieldbus and how to address that, Maybe you have some documentation for your fieldbus card or for your controller.

[tangwenxin]

good idea. The questions is, since I use labview7.0, many advanced funcation is not available. Therefore, I hope to do this
from low level. At this point, I was stucked. I don't know how to achieve this kind of instrument and what's the string formate
for fieldbus.