LabVIEW - Get NI-DAQmx Device Alias from Product Name

[Pete.Dunc]

Overview

This VI utilises the System Configuration API to search a local machine's resources to find the DAQmx Device alias based upon the product name.

Description

This is useful as a NI USB-6212 may appear as 'Dev1' on your machine, but have the name 'Dev2' auto-assigned on another.

Requirements

Software

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

Hardware

• NI Multifunction DAQ Device

Steps to Implement or Execute Code

1. Download the VI
2. Run the VI.

Additional Information or References

[THMSaschaM]

How could I change the Device Alias like this: "Dev1/ai2" ?

[Pete.Dunc]

It sounds like you're describing a Physical Channel rather than a device, you can do it a number of ways.  If you want to extract all of the physical channels available to the device, you can use a DAQmx Device property node.  Otherwise just treat the device name like a string and typecast to the correct datatype (you can also wire a string to DAQmx Create Virtual Channel, so don't necessarily need to convert back).

[PghFool]

I, too, would like to use the results of the Find Hardware routine to create a channel for a DAQmx task.  I am using LV2018, and when I run the Show All Hardware.vi from the examples, I get back aliases that are strings that look like 8 digit hexadecimal numbers.  If I concatenate such a string with a port0/line0:7 and send to DAQmx Create Channel.vi, I get a -200220 error, "Device identifier is invalid".  I have also tried typecasting the alias to a physical channel, concatenate it with port0/line0:7, and typecast it again, to more closely follow the example above, but with the same result.  Any ideas why it's not working?