To display data on a waveform chart, the data needs to be in an array form. How you can modify the display on the chart depends on which VI you use to get this array.
You can search on our Intrument Driver web site at:
http://ni.com/devzone/idnet/
and see if there already is a LabVIEW driver for your instrument.
To get more than one plot on your chart, you'll just need to have a 2D array of data. Each column would be new y data on the chart.
Chart will not allow you to input the X axis data. By default, it displays the Time on the X axis. If you need to change the Y axis data based on the X axis, then you should probably use the waveform graph.
Posting an example of your VI that is supposed to display data on the chart would help answer your question better.
Also, try looking at some of the chart and graph examples that ship with LabVIEW. They will give you an idea how to change the display.
I hope this helps.
Have a nice day.
Zvezdana S.
National Instruments
