I open the program below and run it and Numeric 2 and 4 only increment 9 times The loops both get executed 10 times (0,1,2,3,4,5,6,7,8,9) every subsequent run, Numeric 2 and 4 only increment 10 times I tried making 19 the default values for Numeric 2 and 4, saved, closed, opened and Numeric 2 and 4 are shown as 19 but when I run it the first time, they change to 9 If I change it to a shift register then it seems to work even on the first run

LabVIEW

For / While loop first execution

@cwhw112 wrote:

Since someone referenced how you can expand down the left side of a shift register (to utilize values from previous loop iterations), I assume the FB node delay must then be number of iterations where no output comes from the FB node

If you really want to grasp these concepts, I recommend doing your own breakdown.

We can explain the model of the FBN (or whatever concept) but the best way to make it stick is to scrutinize the concept over a few sessions (test, let it sink in, test, etc.). Than, for optimal results, explain it to someone else.

After all, this is all described in the manual too: Feedback Node - NI

However, that will tell you all the options, but you won't grasp the ins and outs until you play with it. A lot.