How do I controll a sub vi.

[irfocus]

I built a subvi to do redundant calculations.  I do not want this vi to appear when I call it (I just want it to calculate and pass back the results).  Also, after it is called I want it to go away completely.  When it is called now it appears on the screen and the variables do not reintialize each subsequent time I call it (ie, a summed value does not start at zero even though I program it to do so).  How/where do I set this up to operate as needed?  Is this control in the subVI or where I call it in the main program?

[MikeS81]

Hi irfocus,

how do you call your vi? Normally if you didn't change the vi options, then it should work as you expect. Do you use a loop inside your sub vi? If yes, then you should initialize the shiftregister.

Can you upload you vi?

Mike

[GerdW]

Hi irfocus,

usually vis are set to not appear on call. You probably set the vi properties to "show frontpanel on call" and "close FP afterwards". Turn both items off!

Second:

Your problem of "non-initialized control" seems related to the use of shift registers. But without seeing any code we can only guess what's wrong. So please attach your vi!

[J.DECHET]

Firstly, to avoid your subVI became visible when is called, uncheck "Show front panel when called" available in the VI properties (right click on icon of SubVI), Category : Window Appearance then select Custom then press "Customize..."

For your problem about initialization, it depends on your code:

- Do you use Shift register and if yes, think to intialize these if you want always the same conditions to the start of calculation.

- Do you use global variables as entry of your calculation? 

- ... to see with your code