Trending and Charting

Iotellect SCADA/HMI provides several ways to view and analyze I/O channel values over time.

The Analytics Console can be used for quick analysis of real-time and historical values. For HMI visualization, charts can be added to dashboards as dashboard components.

If historical values should be displayed, channel history storage must be enabled for the corresponding device variables.

The Analytics Console is used to view and analyze time-based data, such as I/O channel values, device variables, and historical trends.

Any value that has history storage enabled or a statistics channel can be displayed. The source is not limited to device variables: any context can be used, including Digital Twins, so Iotellect SCADA/HMI tags can be charted directly. A chart based on a tag shows the process value regardless of which device tag is active, while a chart based on a specific device variable shows only the values of that source.

The console includes two chart modes:

Regular Chart — builds a time series from the values as they are stored, taking them from variable history or a statistics channel without aggregating them. It can be used to view recent or historical values and may include real-time data.

Aggregated Chart — uses the Summary function from the Utilities context to build aggregated time series by calculating averages, minimums, or maximums for each time period. The aggregation period and aggregation type are configurable. For example, the chart can display average values calculated over hourly or daily intervals.

Historical values shown in charts depend on device variable history settings.

A chart shows one or more series, each with its own data source, axis, and line style. Add a series with the Add Series button in the Series Configuration section, and an axis to display it on with Add Axis in Axis Configuration. Series names must be unique.

A series takes its values either from a statistics channel or from an expression: select the channel in Statistics Channel, or select Do Not Use there and enter an expression in Expression. The remaining properties identify the value and set the appearance of the line:

The Save Configuration button stores the series and axis configuration for the current user, so the console opens with the same setup next time.

Alongside the series that plot source values, the console can plot metrics calculated from them — a trend line, a percentile, or a target level to compare against. Add one with the Add Metric button in the Analytics Configuration section.

Start with Series Type: it determines which of the remaining properties apply.

Moving Average and Linear Regression are calculated from a source, so they use Context, Variable, and Field and leave Value empty. Percentile uses all four. Reference Line is a straight line at a given level and uses Value alone.

By default, any I/O channel in Iotellect SCADA/HMI doesn't store its historical values. To enable history storage:

• Right-click on a device account () in the System Tree.

• Select Edit Device Properties ().

• Switch to Device Settings Synchronization Options () tab and set necessary storage time for one or more properties.

• Click OK to save the settings.

For more information on the above settings, see Device Settings Synchronization Options.

In Iotellect SCADA/HMI, charts are dashboard components. See Charts section for comprehensive description of chart data model, properties, and use cases. Creating a chart for displaying historical and real-time channel values can be done by following the tutorial monitoring device parameters using a chart.

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