Welcome to LV. I'm fairly new myself, so don't quote me, Unless you hear it from someone else more knowledgeable than me.
There are a few things I notice.
Usually it's helpful to mention what version of LV you're using. Base,.. Professional, year. something about it
When I clicked and downloaded your vi, it does not contain sub-vi's that are essential for operation. The picture I'm posting is what I see when I open your vi as downloaded.
I think that a way to deal with this is to create a zip file that contains all the vi's.
The following solution is a maybe. (I'm not sure if what I'm about to describe is a result of having the Application Builder as an add-on. If everyone has this great, or maybe you have application builder.) I believe you can do this easily when your vi is made as a project. Assuming you have a newer version of LV, you can do this from the splash screen (the box that pops up when you first start LV). Click "create project". Click blank vi (or a state machine if you want a little more flexibilitiy on implementing your code. Start with just a blank vi if you're brand, brand new. Then you have just one "sheet of paper" to consider. ) After you name the project and put your code in the main vi, save it. Then while you're looking at the Items tab of the project, right click on the words "Build Specifications" > New > Zip File. Hopefully that works. I've never done it.
I'm wondering, how does your code know that current or voltage changed? How much of a change is needed to trigger saving data? I see there is a current limit, but that seems like max current the power supply will produce. I guess it's not related to detecting that much change in current to save the data. Is there a voltage limit? If so, probably should label it as such.
I'm thinking there needs to be a while loop with shift registers. Each time the loop cycles it will compare the previous reading to the current reading. Then if the difference between the previous and current readings exceeds a threshold, the current reading will go to a case structure (inside the while loop) where there is a "write to spreadsheet file", set to append.
To get a shift register, right click on the right or left wall of the while loop, select Add Shift Register. Then click the opposite wall. wire the voltage or current to the shift register on the right. make two of them. If you had many data points you would need to condense them into a single shift reg. On the outside left of the while loop, right click the shift reg input wire and create constant zeros to initialize them. The shift reg coming from the left will be the previous iteration.
Add a millisecond (ms) "wait" clock inside the while loop and put a constant on the input. This will control the delay between loop iterations. How often do you want to check for readings?
(As an aside, this is the first time I've posted to the forum responding to someone. I didn't know if I should click "Reply" to Mike, who was the last person in the thread. Or click "reply" to the orginal post. So i picked the original post, and we'll see what happens. Hopefully it will turn out all_ok.)
