Maybe there is a better solution ! Take a look at screenshot (on my computer, LV is in french but it will help you anyway) : that's an example, you can search it among LV examples ("Event Response.vi").
Here is a part of VI documentation :
"This example demonstrates how to use the timed loop in conjuction with the Digital Change Detection DAQmx timing source to show how to do an Event Response application. If a digital edge is detected we want to immediately respond to this and shut down our process.
Note: This example only works with National Instruments devices which support Digital Change Detection"
So, you should try using "DAQmx Create Timing Source", which is a polymorphic VI. And you will need to use a timed loop as well.
In this example, the instance selected is "Digital Change Detection". But on the screenshot, I have highlighted in blue the suitable instance for your need : "Digital Edge Using Counter". You will need to adapt this example for your application, but it should work with counter input.
Please let me know wether or not it works ! (hoping that your HW will allow using this technique...)
