Strain-Temperature Data logger

[Steve1]

What is the best way to use DAQmx read, start and stop VI's to read both strain and temperature from an SCXI box with 1520, 1314 and 1112 modules. Below is a VI with my approach. Seems like the start and stop are overused.

[Sarah Thompson]

I was unable to view the block diagram of the VI you posted. Also, a few subVIs were missing. Could you try again to post a zip file? In the meantime, to read the two types at the same time, you'd have to configure them both as generic voltage readings since you can't bundle more than one analog input type into a task. Hope this helps.

[Steve1]

Here's a simplified veresion of the instron data logger vi. A vi from the datalog.llb is included to be able to open the block diagram.

The way the task are used in this VI allows two different analog output types to be used precluding the need to have a generic voltage.

I'm not sure if this is the correct way to do it because the DAQmx is opened and closed many times. Eventually, I'd like to make 10 measurments a second.

[Sarah Thompson]

In essenscence, you have created two separate tasks as shown by your sequence structure. If you tried to run them at the same time instead of one after the other, it would give you an error. Currently, you have to configure all the channels in a task for the same type of measurement or execute them serially as you have in the attached VI.