The trend analysis provides a number of features for analyzing trend data.

Analysis mode

Analysis mode is automatically enabled when loading a trend. You can identify that analysis mode is enabled by the fact that the cursor automatically snaps onto the trend. If a data point from a trend is selected by right clicking, a dialog box for selecting the signal analysis opens for this time stamp. Analysis mode can be enabled for all trends or explicitly for one trend in the legend. Selecting a trend prevents an incorrect trend or sensor from being selected for the subsequent signal analysis. In this mode, the data point from the selected trend closest to the mouse position is always selected for the subsequent signal analysis.

Right clicking on a data point opens a dialog box containing the following options:

  • Create a log book entry

  • Open the signal analysis window.

You can find more information about signal analysis in chapter Signal analysis.

Zoom

By default, the X-Y zoom is enabled. The <Zoom out all> button can be used to reset the zoom. The <Zoom out> button is used to zoom out gradually. If you hold the <Shift> key depressed while zooming with the mouse, the zoom works only in X-direction. Y-scale and Y-position will not change. The time range of the trend in total remains unchanged. The navigation pane below shows the position of the zoom frame.

If you press the <Ctrl> key whil zooming with the mouse, the time range of the trend will be adjusted to the x-range of the zoomed area. If you only want to zoom in x-direction, press also the <Shift> key when zooming.

The <Y Autoscale> button scales the data in the visible area on the Y-axis only, depending on the trend data.

Trend analysis controls:

Zoom out all, only active in zoomed view


Zoom out one step, only active in zoomed view


Auto scaling in Y-axis

Rel

Show relative view

Abs

Show absolute view


Refresh display


Create screenshot of display

A

Show legend in chart


Download dataset as CSV file


Add tile to dashboard


Show/hide all trends

Expand/collapse all items in trend legend


Remove all

R

Show/hide raw data of all trends in the trend analysis legend

The state of the raw data mode is also saved when removing trends from the trend analysis legend. When you add a trend again, the information is still available.

Drop-down menu for changing the aggregation setings for the trend view


Opens a dropdown list with the option of combining the signals and display options in the legend:

  • Combine signals (only relevant for trends with trend filter)

  • Group by unit

  • Metadata (show signal id, text and value/unit in trend legend)

  • Path for plant item (path inside the plant)

  • Full path (path with plant name)


Turn on editing mode


Apply change


Discard change, cancel

Show/hide trends

Clicking on the eye symbol allows the associated trend to be shown in or hidden from the chart. Double clicking allows all other trends in the chart to be shown or hidden. All trends are only shown if the selected trend was already shown, otherwise only that trend is shown.

Adding a tile with open trends to the dashboard

Clicking on the dashboard icon adds a tile for the trends open in the trend analysis to the currently open dashboard.

Creating a trend chart screenshot

Clicking on the camera icon creates a screenshot of the trend chart. The Copy icon copies the screenshot to the clipboard and it can then be pasted into the log book, for example.