How do you obtain graph informatio​n from a subvi?

Question

Hello all,
I have a working VI that varies a voltage source with certain start end and intervals. and every step it increases the voltage, it takes a look at a spectrum which is graphed in a multiplot-XY graph. the vi on its own works perfectly fine. Now the problem is: when i tried to implement this vi as a subvi to a larger VI, the graph does not get updated during the steps, but only gets updated once when the subvi finishes and displays the final graph. I have connected the XY-Graph of my subvi to an output terminal and connected that to  a local variable of my bigger proram's Xy-graph.
I'd assume the problem is that the graph information only gets passed out of the subvi to the main vi once at the end of the subvi operation. (i have a for loop in my subvi to increase the voltage by steps, and then the same loop i take a spectrum and graph it, and i think that is the problem since i'd assume no information from this for loop will be passed out to the main  vi until the loop finishes, no?
attached is a look at my subvi.
thank you very much for all your help!!!!
Attachments:
t-series.JPG ‏165 KB

Answer 1

Hello GerdW
=P sorry about the messiness~~
and to your answer:
i don't quite understand what exactly you meant by your answer. "wire a reference of the indicator to the subvi" the indicator as in the xy graph? and what exactly is a reference? those static vi reference thing? (sorry, i'm veeeeeeery new at this labview as you may tell from the messiness)
"use a proerty node to set new values in the xy-graph": isn't that what i used in my block diagram? I used a XY-graph value property node to update the xy-graph within my subvi.
so it won't work by simply making my XY-graph an output terminal and connect that terminal to the main VI's xy-graph?
if it's not too much trouble, please be bit more specific ><
 i uploaded the subvi even though it's missing few sub-subvis? (the main vi is 1mb big and requires like 270 different subvis so it's impossible to upload that one -_-)
thanks again for your help GerdW!
Attachments:
t-series.vi ‏62 KB