Programmatically Select DAQmx Physical Channels for Task Configuration

[Pcorcs]

Overview

This example demonstrates a programmatic method for selecting available devices on a system for DAQmx task configuration.

Description

Employing methods to programmatically select available devices and physical  channel types, allows developers to avoid User input for application deployment. The example below uses the DAQmx System Property Node to isolate the first available Digital Input (DI) lines, and forwards a selected subset for DAQmx Task configuration. This example is meant to be demonstrative of the available System and Device properties that may programmatically be extracted. Further logic may be implemented to isolate specific device names, bus types, or additional I/O types.

Requirements

Software

• LabVIEW 2012 or compatible
• NI-DAQmx 9.5.5 or compatible

Hardware

• NI Multifunction DAQ Device with at least one counter

Steps to Implement or Execute Code

1.Download the attached VI.
2. Set the DAQ device.
3. Run the VI.

Additional Information or References

 

 **This document has been updated to meet the current required format for the NI Code Exchange.**

[Fraktur]

Demonstrates the DAQmx System and DAQmx Device realtionship very well. A link to this in LabVIEW Help would be nice.

[sha4790]

This was useful but, the output of the subarray function will not get into the input of DAQmx-create-channel.vi function...

The required input format is as given on this link: http://zone.ni.com/reference/en-XX/help/370466AC-01/mxcncpts/physchannames/

So what is required to be done and I cannot find a way to do is:

- the output of this VI is of the 1D array of physical channels format.

- the required input format for DAQmx task configuration - even for multiple channels is "physical channels" and all the channel names have to be listed as given on the link towards the end.

The out to input incompatibility is what i want help for...