a property node for returning a DAQmx task's configuration

[lmd2]

The tasks for this project are preconfigured in MAX, but on one occasion the operator needed to go in and change the sampling rate  I would like to add a routine at startup to check the sampling rate of the configured tasks. I know that using a DAQmx property node can return task names, and channel names, but what I could use is a property node to return a task's sampling rate. Any one know of a way to do this?

[smercurio_fc · Accepted solution]

If you place a Property Node on the block diagram, connect it to your task control. Then right-click on the property node and select the DAQmx Timing Class (Select DAQmx Class -> DAQmx Timing). Then select the Sample Clock -> Rate property.

[lmd2]

well your solution sounds perfect and I don't know what may be wrong but my timing Class seems to expose no properties (?) @#$%^&*

any idea why?

please see the attached screen shot

thanx

lmd2

[smercurio_fc]

What's coming out of that subVI? I created a task in MAX and had a task control on the front panel, and what I indicated worked to get the sample rate.

[lmd2]

the subVI outputs an array of DAQmx tasks. This client is still using LV 8.6

I know scripting exposes more properties, and in older versions of LabVIEW they were not all exposed. What version of LV is this working for you? I have been thinking of upgrading this client to 2010 - this may be a good excuse/ Again what version is this working for you>

thanks

lmd2

[lmd2]

okay I have it, need to right-click > select filter > show all properties

then it shows up (I am not presently at the client's so am not connected to the hardware)

thanx agaain

[smercurio_fc]

I was actually working in 8.2, but I'm glad you found out the issue with the properties not being listed.