Selecting Data for Creating a Chart

The first step in creating a historical chart is to determine the SCADA data to be examined on the chart. The tree menu located on the left side of the EOS Chart Panel allows the SCADA data available in the system to be displayed and selected hierarchically.

  1. Find the SCADA data you want to display on the chart from the tree menu on the left.
  2. You can select a single data item or select multiple data items to be examined on the same chart.
  3. Select the date you want to work with from the date selection pane on the right.
  4. Create the chart based on the selected date and data.

Multiple data selection: Multiple SCADA data items can be selected simultaneously from the tree menu. This feature makes it easier to comparatively examine the behavior of multiple process variables over the same time period.

Date Selection and Chart Refresh

Date selection in chart operations determines which historical data period will be examined. The user can select the relevant day by clicking the desired date in the date selection pane on the right.

If a date has already been selected, the chart can be redrawn or updated by double-clicking the chart area with the left mouse button. This provides a practical way to reflect the selected data or date in the chart area.

Basic operation sequence:

Select data → Select date → Create/update the chart → Examine the chart

Chart refresh: If a date has already been selected while working in the chart area, double-click the chart area with the left mouse button to create a new chart view or refresh the existing chart.

Clearing Data Selections

After working with multiple data items, it may be necessary to remove the existing selections before preparing a new chart. In the EOS Chart Panel, this can be done using the status menu opened by right-clicking the tree menu.

  1. Right-click the SCADA data tree on the left.
  2. From the status menu that opens, use the command for clearing the current selections.
  3. Select the SCADA data required for the new chart.

This method provides a faster starting point, especially when many data items have been selected, instead of removing the selections one by one.

Zooming in on the Chart

The zoom operation can be used to examine a specific time interval or a particular area of change in greater detail. The user can select the area to be examined on the chart using the left mouse button and enlarge it.

Zooming is particularly useful for examining short-term changes, sudden process movements, or closely spaced values in detail. When the chart is zoomed multiple times, each operation creates a new level of examination based on the previous view.

Analysis approach: The relevant time interval can first be identified on the overall chart. The selected area can then be zoomed in to examine process behavior in greater detail.

Chart Status Menu

The Chart Status Menu opens when the user right-clicks the chart. This menu provides the main tools required to manage the chart view and obtain chart output.

Particularly when working with a zoomed chart, this menu can be used to return to the previous zoom level or remove all view changes and restore the chart to its initial state.

Menu Option Function
Copy Copies the chart image to the clipboard as an image.
Save Image As Allows the chart to be saved as a file in EMF, PNG, GIF, JPEG, TIFF, or BMP format.
Page Setup Allows printer and page layout settings to be configured before printing the chart.
Print Sends the chart to the default printer for printing.
Show Point Values Displays the values of the corresponding chart points when the cursor is moved over the chart line.
Zoom Out Returns the chart to the previous zoom level.
Undo All Changes Removes all zoom operations and returns the chart to the view level at which it was originally created.
Reset Scale to Default Restores the chart scale settings to their default values.

Zooming Out and Undoing Changes

After zooming in on the chart, there are two different options for restoring the previous view. These options allow the user to manage the view levels created during chart analysis in a controlled manner.

Operation Result
ZOOM OUT Returns the chart to the previous zoom level. If multiple zoom operations have been performed, the levels can be reversed step by step.
UNDO ALL CHANGES Removes all zoom operations and returns the chart to the original view level at which it was first created.

Example: If two different zoom operations have been performed consecutively on the chart, selecting ZOOM OUT first returns the view from the second zoom level to the previous view. To remove all zoom operations in a single step, use UNDO ALL CHANGES.

Show Point Values

The Show Point Values option can be used to examine the numerical value at a specific point on a data line in the chart.

When this option is enabled, the values of the corresponding chart points are displayed as the cursor is moved over the chart line. This allows the user to examine not only the overall trend but also the numerical value represented by specific points on the chart.

  1. Right-click the chart area.
  2. Enable the Show Point Values option.
  3. Move the cursor over the chart line.
  4. Examine the values associated with the relevant chart points.

Analysis convenience: Displaying point values is particularly useful when the process value at a specific point in time needs to be quickly checked directly from the chart.

Copying and Saving the Chart in Different Formats

The Chart Status Menu provides Copy and Save Image As options so that the generated chart image can be used in other applications or transferred to technical documentation.

Operation Description
Copy Copies the chart image to the operating system clipboard in image format. The image can then be pasted into another application.
Save Image As Allows the chart to be stored as a file.

The Save Image As option allows the chart to be saved in EMF, PNG, GIF, JPEG, TIFF, or BMP format. The format can be selected according to the intended use of the chart and the image formats supported by the target application.

Page Setup and Printing the Chart

The chart can not only be saved digitally but can also be printed directly. For this purpose, the Page Setup and Print options in the Chart Status Menu are used.

  1. Right-click the chart area to open the Chart Status Menu.
  2. Use the Page Setup option to define the page layout before printing.
  3. Use the Print option to print the chart.

Printing: The Print command sends the chart to the system's configured default printer. The Page Setup option allows the print layout to be prepared before the output is produced.

Resetting the Chart Scale to Default

During chart analysis, changes can be made to the scale and view. The Reset Scale to Default option in the Chart Status Menu restores the chart scale settings to their default values.

This operation can be used particularly when the user wants to continue a new evaluation from the initial view after performing different chart analyses.

Recommended Chart Analysis Workflow

When examining historical SCADA data in the EOS Chart Panel, performing operations in a defined sequence makes the chart creation and analysis process more systematic.

  1. Data selection: Select the data to be examined from the tree menu on the left.
  2. Date selection: Select the relevant day from the date selection pane on the right.
  3. Chart creation: Create the chart based on the selected data and date.
  4. Chart refresh: If necessary, double-click the chart area with the left mouse button.
  5. Zooming: Select the area to be examined in detail with the left mouse button and zoom in.
  6. Point inspection: If necessary, enable the Show Point Values option.
  7. Restoring the view: Use the Zoom Out or Undo All Changes options.
  8. Output: Copy the chart to the clipboard, save it in an appropriate image format, or print it.

Result: This workflow allows the user to perform different levels of chart analysis through the same panel, from examining the overall trend in the SCADA archive to checking the numerical value at a specific point in time.

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