@50616d656c61 wrote:
I attached a picture of the block diagram, hope it is enough.
Well, no, it is not very helpful. We cannot see the entire VI (including, in particular, the indicator to which you are sending the data, unless I overlooked it), we cannot test the VI, modify it, etc., and we also do not have a LabVIEW-readable example of the data you are trying to plot!
Nevertheless, I'm going to make some guesses and see if I can help. I'm guessing you are writing to a Waveform Chart. I am guessing you know the delta-time between VISA samples (and have a reasonable expectation that this time remains constant, let's say it is 0.1 sec, for each data point).
If you plot 100 rows (representing 100 samples from the 5 sensors), you should get 5 lines with the X (Time) axis going from 0 to 99. Right-click your Chart and choose Properties. Look at the Scales property of the X Axis. Now it gets a little tricky, depending on whether you are plotting 1D Array of Waveforms or 2D Array of Dbls (see, looking at your VI, I would know this ...). Let's say 2D Array of Dbls. The X Range may be AutoScaled -- you want to control this, so you want AutoScale to be off. Look at Min and Max -- this sets the left and right extremes. Now there are three quantities to consider -- the number of discrete points on the chart (should be at most 1000, let's choose 600 just for this example), the sampling time (here 0.1 sec), and the "time width" of the Chart (here 600 * 0.1 sec = 60 sec). So make the following adjustments:
X Min = 0, X Max = 60 (to set the width, in seconds)
Multiplier = 0.1 (to scale the samples to Chart units)
Look at the Chart. Its limits should be 0 and 60 (which is what you want), and as you plot, your data should take 60 seconds to "crawl" from the right edge to the left (assuming you are using a scrolling Chart).
Bob Schor
