## Trends The WebCTRL® system can read and store equipment status values over time and then display this information in a trend graph to help you monitor the equipment’s operation. You can collect trend data for any point value in the WebCTRL® system. The controller reads point values at intervals that you define and then stores that data in the controller. A controller has limited memory for storing trend data, so you can set up historical trending to archive the trend data from the controller to the WebCTRL® database. A trend graph can display data from the controller and the database, or it can display only data stored in the database. After you set up the desired points for trend data collection, you can: View built-in trend graphs that show a single point Create custom trend graphs with multiple points
In This Section To collect trend data for a point Viewing a built-in, single-point trend graph Creating a custom trend graph Adding trend categories Using trend graphs