Use last value if new value not avaliable after a certain amount oft time

Question

Hey guys,
So I want the loop below to execute every half second,
however the "read power in" VI takes around 5 seconds to return a value, which means the loop can only operate every 5 seconds (it waits on a value from the "read power in" VI.
Is there a way to tell the program to use the last value of power returned from "get power" every 0.5 seconds if no new value has been returned?

Answer 1

Ahhh, I see why you did this.  I thought that diagram looked familiar.  You posted this question: http://forums.ni.com/t5/LabVIEW/Search-string-value-to-return-integer/td-p/1330516
You need to use a USR (uninitialised shift register) to remember what the last string was that was not processed and prepend it to the last one. Attached is an example.  The inner loop breaks up the string but remembers where it was broken the last time to allow it to spit out the next part of the string on it's next call.  The outter loop reassembles the string and only spits it out if it has gotten a full string.
A
Attachments:
read partial till complete.vi ‏29 KB