GPIB Read in LabVIEW 7.01

[datalog]

I've posted this request over on the GPIB forum but I think this is probably a better location. I'm new to GPIB level LabVIEW but have developed a few applications, previously,  around existing instrument drivers. I want to write some simple configuration and data transfer functions around GPIB with ILX Lightwave and Keithley instruments.

I am able to send GPIB commands to each instrument, such as setting wavelength, voltage, filter time constants and so on, but I am having trouble reading from each instrument. I'm sure its a coding issue as this is the same with each instrument. After sending a command, such as :FILT fast to the ILX Lightwave 8210H and seeing the front panel indicator change, I send a GPIB Write again, with :FILT? followed by GPIB Read. The string returned from the GPIB Read has an unreadable format. I'm sure this is just a formatting issue, but  can anyone here shed some light on this?

regards,

Datalog 

Windows XP

LabVIEW 7.01

[lmtis]

Hi datalog,

could you post a screenshot of your code along with a probe showing the data received?

Message Edited by lmtis on 05-06-2008 07:12 AM

[datalog]

I've attached a jpeg which is a screen dump of the LabVIEW windows used. Hopefully this will provide the data you requested

[datalog]

I just opened up the JPEG and the resolution is poor. Here is another image from the data window

[lmtis]

Well, that shows what the data string looks like.  Could you make a pic of the wiring diagram?  By the way, here is a link to a good freeware for grabbing a screenshot.

http://www.download.com/MWSnap/3000-2347_4-10524229.html?tag=lst-1&cdlPid=10544482

[lmtis]

also, try opening max, and type filt? in the send string and click on query.

[datalog]

Here's a screen image using the download s/w. I've also sent the :Filt? query to the ILX 8210H, followed by GPIB Read. Saving the jpeg and opening in explorer shows the text that was read.

[Dennis_Knutson]

There is no image.

Spoke too soon. This image is not much different than the earlier one. You were asked to duplicate the query in MAX. Did you do that?

Message Edited by Dennis Knutson on 05-06-2008 09:56 AM

Message Edited by Dennis Knutson on 05-06-2008 09:58 AM

[datalog]

Excuse my ignorance here, but what is MAX?