Configuring Chart Update Modes

LabVIEW includes three update modes for charts:

Strip Chart—Default update mode. Running data continuously scrolls from left to right across the chart. Older data is on the left; newer data is on the right.

A strip chart is similar to a paper tape strip chart recorder.

Scope Chart—Shows one item of data, such as a pulse or wave, scrolling partway across the chart from left to right. For each new value, the chart plots the value to the right of the last value. When the plot reaches the right border of the plotting area, LabVIEW erases the plot. The chart then begins plotting again from the left border.

The retracing display of a scope chart is similar to an oscilloscope.

Sweep Chart—Works similarly to a scope chart except that a sweep chart does not immediately erase old data. Instead, a sweep chart shows old data on the right and the new data on the left separated by a vertical line. LabVIEW does not erase the plot in a sweep chart when the plot reaches the right border of the plotting area.

A sweep chart is similar to an EKG display.

To define the chart update mode, complete the following steps.