How exactly does the logical shift function work?

I think I am missing something very basic here - I am trying to left shift an 8 bit unsigned integer by one place (x<<1)in each iteration of a while loop. So if I start with a number, say 18, the first iteration I get 36, then 72, 144 and after this 32, 64 and so on. I'm not able to do this apparently simple operation in LabVIEW. I tried the logical shift function and a formula node, but both dont give me what I need. The formula node appears to be close in that it gives me 18,36,72,144 but after that I get 255 rather than 32. I dont understand what the logical shift function is doing here. I have attached a vi here that shows what I am trying to do. Any help explaining the mistake I am making will be greatly apprec
iated.
Thanks.
Attachments:
Logical_Shift.vi ‏17 KB

You have the inputs confused. If you want to left-shift by 1 at each iteration, the "1" goes on the upper "y" terminal and the number from the shift register (the "shiftee") goes at the bottom. (see attached modification).
LabVIEW Champion . Do more with less code and in less time .
Attachments:
Logical_Shift_2.vi ‏27 KB

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