Graphs (PDA Module, Touch Panel Module)
Graphs in PDA and Touch Panel applications are similar to waveform graphs and XY graphs in LabVIEW for Windows. Graphs can display plots that contain any number of points of the following data types:
- A single array of values. PDA and Touch Panel graphs interpret array data as points on the graph and increment the x index by one starting at x = 0.
- A cluster with an array of x values and an array of y values.
- A 2D array of values, where each row of the array is a single plot.
- An array of plots, where each plot is a cluster that contains an array of x values and an array of y values.
- An array of clusters of plots, where a plot is an array of points and a cluster contains an x and a y value.
- A cluster of x, delta-x, and an array of y values.
Waveform graphs do not support the following:
- Horizontal scroll bars
Use the Zoom Chart or Graph VI to add zoom functionality to any graph in a PDA or Touch Panel application.
Plots on Waveform Graphs
You can display multiple plots on waveform graphs. PDA and Touch Panel applications do not support plotting more than 32,000 elements. If you attempt to plot more than 32,000 elements, the first element of the array overwrites all points between 32,000 and 64,000. The waveform repeats every 64,000 elements. The PDA or Touch Panel application plots the first 32,000 elements and then repeats the first element 32,000 times.
The number of plots in the Plots shown numeric control in the Waveform Graph Properties dialog box must equal the actual number of plots or the application behaves incorrectly. The maximum number of plots is eight.
Resources
- Tutorial: Creating and Using Shared Variables in the LabVIEW 8.20 PDA Module- Developer Zone - - NI Developer Zone
- Reading and Writing TEDS with the LabVIEW PDA Module- Developer Zone - NI Developer Zone
- Creating LabVIEW Applications to Communicate Between PACs and the NI TPC-2006 Industrial Touch - NI Developer Zone