Pedja,
I don't think I understand your questions; however I will try to answer them. If I misunderstood let me know and we will get this figured out.
1. "The second linear line does not appear only step graph"
a. I was not able to run the VI because I don�t have the SubVIs or the instrument; however I think the line is most likely due to a point at the end of your array. I imagine if you where to look at all the values in the Time array and the Output Voltage Array indicators you will see that the very last point is 0,100. You initialize the Time array to have a single point 0 and then insert values based off the counter. So loop iteration 0 will insert a value at index 0 so you will then have a Time Array of 2 elements [x,0].
2. �The slope in transition p
hase is not vertical (infinity) there is some time delay.�
a. Do you want it to be vertical or do you like the slight slope? Because I can�t run the VI I can�t see the actual arrays that are being plotted; however, the slight slope is due to some offset in the time array. So verify that the values in your time array are what you expect.
Evan
National Instruments