writing as value to be used later?

[cbt]

I want to store a value of a temp sensor every 15 min and then use that stored reading to calculate the rate of change of that temp vs the current reading of the sensor what would be an easy way to accomplish this in a vi?

I tried using a elapse timer vi and writing the value to a global once the timer has elapsed didn't seem to work

[shjukheter]

Have you heard or know about shift register or local variables. I suggest you to look at shift register and it use. Also, you can find the discussion here about shift register.

BTW, If you want to use shift register, just click on the loop border. You can see the shift register in options.

http://forums.ni.com/t5/LabVIEW/shift-register/m-p/1778678#M616859