Min/ Max interval data storage

Question

OK, so what I am trying to do is scan 2 voltages at 3K, temporarily write that data to a file or buffer, read the min and max values, and log those to a file once per minute. I'm at the point where I can scan and display the data, but really don't know where to go next. Any thoughts or ideas would be much appreciated. Thanks
Attachments:
NI-6343-2CH VDC min-max.vi ‏45 KB

Answer 1

You only need a single loop. You can use the "elapsed time" express VI to signal when time has elapsed, and simply use a case structure to append the averages to the data before writing (in the false case just wire the current data across). You should also open the file before the loop, append inside the loop, and only close the file once the loop completes. You can use the min&max ptbypt VI to keep track of the min and max for each interval or just keep track of it using a shift register.
LabVIEW Champion . Do more with less code and in less time .