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Total: ~58 min
The trend viewer is a key tool for displaying data to a user, particularly for historical and logged data. This control may be used to plot data in real-time on the dashboard, and comes with it a variety of tools accessible to the user in runtime to get extract the most information out of the data.
A primer on the Trend Viewer, how it is configured, and the primary applications for it in SCADA and analytics displays.
A trend view control is a common and straightforward way of presenting data for a tag over a period of time. They are especially well suited for use with historical data as well as current real-time trends.
Pens are the basic element on a graph within the control that is used to represent the data for a tag. Learn the basics of adding and configuring those pens to be used within the control in runtime.
Several plotting modes are supported in the control including line, bar, area, pie, and polar charting. These can be switched easily, and even to allow for multiple types to be used in a single chart.
The chart is the principle element within the viewer, and controls the time range and scaling factors of the graph. Learn how to configure it for a variety of purposes.
When adding multiple pens to a chart or trend view it is important to decide whether they will share a axis scale or use individual axes. Each can be configured within the viewer.
Several built-in tools allow for greater runtime access to data in the viewer. For example, data legends and runtime cursors allow operators to quickly view data values and ranges for any given time period.
The trend viewer is far from a static environment in runtime, several features allow for dynamic data retrieval including time period zoom and historical playback. It is one of the primary tools for view historical time series data
Data is most commonly logged in UTC and adjusted to local time when viewing, but when working on a large or multinational project you may wish to shift time zones in viewers to better align data.
Trend view configurations can be saved and loaded independently of the display they reside within, allowing for flexibility in how users load and manage their individual dashboard environments.
Trend and Chart views can accept commands from user action, allowing for an easy interface to add/edit/remove pens, change time ranges, and more.