Vi transitional measure displayed in the graph of the wave are moving outside the scale

With the help of a graph of a waveform to display the pressure over time. I wanted to be able to calculate the time to drop in pressure over time, so I use the vi transitional measure. I copied what was exactly in the example for the measurement of transition inside help and it is correctly determine when to transition down, but I'm having a problem with the cursors in waveform graph. I would like to see a set of greenery along the fall time start and end time of fall as pictured, I have attached the vertical sliders (capture2) as in the example. The problem is the two always begin to 3.43 (capture1) and after each sampling period they (4.34, 5.34, 6.34) increment him come right out of all of the output of transition as these numbers measure. The period of the signal that I am interested is always less than 2 seconds, so I never see the vertical sliders.

I tried replacing it by my signal daq with an sine wave signal generator and it does the same thing.

The block diagram is in the first capture

also, I would be interested to know exactly how the numbers wired to the cursor property active of the property of a waveform graph node toward real sliders on the chart. They are just automatically numbered starting at 0 from the top down?

Wayland

Hi Wayland,

The sliders are still apparent in the example VI for the transitional Measurement.vi, is because the generated signal is always set to zero. Thus, signal resets a 'new' signal for the sliders to move and therefore always on the same location a bit. The waveform graph is also configured so that it won't move or continue to show new incoming data, data sliders have moved on. So in your case, you want to click with the right button on the chart and make sure that "Ignore Time Stamp" is not checked/selected. This will make it so the graph continues with your incoming data and cursors. You can check it in the example file by removing the constant True is the generator of signals and change the mentioned time stamp option previously.

In order to view the available sliders as well as their position numbered, you can right-click in the waveform graph and select Properties. In the Properties window, there is a tab of cursors, inside this tab at the top is a drop-down menu that lists all available sliders, indexed starting with 0 at the top.

-Jake B.

Tags: NI Software

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