NI-DAQmx topology

[mprusak]

Hello,

The problem I have encountered is that topology for NI_DAQmx switches is not saved when I export an INI file.  I want to avoid setting topology manually every time I import an INI file.  I have tried using the DAQmxSwitchSetTopologyAndReset function to set the topology, but the topology does not change despite the function returning success.  Given these issues my questions are as follows:

1) Is the topology saved to some other config file that I can access and modify?

2) Is there a way to set the toplogy programatically after importing an INI file?

Thanks,

Michael

[Bumblebee_Tuna]

Hello,

Take a look at the following KB to see if it helps answer your questions:

http://digital.ni.com/public.nsf/allkb/836390E0A691E1B786256DDD00780A85

-Jayk

[mprusak]

Jayk-

This article describes how to save a config file for DAQmx switches, however, my issues is that the topology is not saved in these config files.  I'm trying to find a way to be able to save/recall or programtically set the toplogy.

[Bumblebee_Tuna]

Are you trying to change the topology during runtime or simply import your connection list for a configured topology?

[mprusak]

No, I'm just trying to import topology along with the connection list.  Not doing anything at runtime here.

[Bumblebee_Tuna]

Can you post a screenshot of how you are configuring your topology and connection list?

[mprusak]

Attached is a screenshot of my connections.  I load this set of PXI cards through the INI file.  The 2576 cards load up as 4x1 mux by default, but I want them to be 16x1 mux.  I'm looking for a way to import this setting automatically, or do it programtically.

[Bumblebee_Tuna]

Thanks for posting the screenshot.  Since the ini configuration files, or other export methods, do not contain the configured topology it isn't possible to deploy topologies. However, you can use the DAQmx Switch Set Topology and Reset VI in order to set a particular topology within LabVIEW. I hope that helps!

-Jayk

[Michael5000Watts]

I am not sure if you can import/export topology settings, but you can programmatically set the topology using the "DAQmx Switch Set Topology and Reset.vi" function. Attached is a screenshot of the VI and its associated context help entry. I hope this helps!

[mprusak]

Is this vi doing the same thing as the C API call DAQmxSwitchSetTopologyAndReset?  I attempted to use this call and it completes and returns success, but the topology is unchanged.