Trouble Communicating with Motion Controller using GPIB

[AWS770]

Hi everyone,

I'm trying to interface with an old Newport MM3000 motion controller using Labview VIs, but I am not able to communicate with the device. I can program and interface with the motion controller just fine using the NI 488.2 communicator, but none of the Labview VIs, including those included with the downloaded Labview drivers for the MM3000, allow me to write to or read from the device. The GPIB address for the VI inputs is the same one that is listed in MAX (GPIB1::1::INSTR), and I am using only the included MM3000 drivers, but even the simplest of commands, consisting only of the aforementioned drivers and a few inputs, does nothing. I'm new to Labview, so my problem may be very simple, but I would really appreciate some suggestions.

Thanks!

[Machop · Accepted solution]

Have you try to use the NI VISA vis por the communication with the GPIB?

[Albert.Geven]

I understood you downloaded the mm3000 software from Newport or NI. Please specify.

And can you show the software you tried. Even better attach your non working vi with commands that worked in MAX.

One possible solution is that you did not add a crlf or have another endcharacter defined.

[Minions]

The default GPIB bus is GPIB0.  If it is GPIB1 as you stated, then it may not be talking on the proper bus.  Make sure that the GPIB address is set properly in the vi.