Lesson 12: Logging and Plotting Tag Data

Objectives:

•      Learn about the default Historical Data Viewer page;

•      Add a logger tag to the application; and

•      Plot and export tag data, and establish pen groups.

Lesson 12 Overview

VTS provides a specialized tag type whose role it is to record incoming or outgoing data to disk. A logger tag can monitor the changing values of any basic input/output tag (or any tag with a numeric value for that matter) and can save this data to a file on your hard drive. This data can then be plotted on the Historical Data Viewer page so that operators can review the historical data on a graph and can determine trends over time.

Before adding logger tags to the application, it is worthwhile to first examine the Historical Data Viewer page and learn about its features.

Estimated Time

It is estimated that Lesson 12 will take approximately 45 minutes to complete.