Graph report with statistics on process data

When operators study graphs to get an overview of process components’ behavior, to detect adverse trends and to see what happened in the process before and after an intervention or incident, it can be useful to also get statistics on the process data displayed in the graph.

The operator can generate a graph report for a user defined period with statistics for the selected graph signals, calculated by the IGSS system, for all graph types except an Embedded Graph Basic. It is also possible to include an image of the graph itself. Graph reports can be created for all objects relevant for graphs: Analog, digital, counter and table objects.

Generate a graph report

  1. In the graph, click the Report icon in the graph’s toolbar – or if this is not available, typically in an embedded graph, right-click inside the graph area and select Generate Report….
  2. In the Graph Report dialog, you can either keep the suggested period (the same as defined for the graph itself), or change the report period (and the graph itself) by clicking the Current: button. This will open the Period tab of the Graph Properties form, where you can define another period.
  3. Select the Graph box, if you want to include an image of the graph in the report. If zoom is used, the zoom window will be included in the graph image unless it is manually hidden.
  4. Under Report includes, select which object signals and values or state changes (digital objects) to include. Double-click the Yes (default) to toggle between Yes and No:
  5. Click Generate to create the graph report.

 

If you have zoomed in on an area of the graph, the graph report will be generated based on this specific period, which will be displayed on the button. Example: 13-03-2020 10:59:39 -> 13-03-2020 11:10:14.

 

View the graph report

The graph report displays separate statistics and other information for each object signal. For all object types the following information is shown:

For Analog, Counter and Table objects, the following statistics are shown:

For Digital objects, the following statistics are shown for each object:

The order of the date format will follow the Windows data format selected for the individual operator pc.

 

Where to find graph reports

The graph report is first generated as preview in HTML format and opens in the pc’s default Internet browser, which will typically offer additional opportunities such as:

The graph report is automatically placed in a subfolder called GraphReports in the operator pc’s TEMP folder with the name graphreport_dd-MM-yyyy. Example: file:///C:/Users/ari/AppData/Local/Temp/GraphReports/graphreport_16-03-2020145306.html

 

Change report format and add company logo

The GraphReports folder also contains a style sheet, graphstyle.css, which is created the first time a graph report is generated. Here, the system designer can change the report fonts etc. and add a company logo.

The style sheet will have to be changed on each local operator pc.

If the user defined style sheet is deleted from the GraphReport folder, the default IGSS style sheet will automatically be created the next time a graph is generated.