From a user perspective, there are slight differences between the absolute and relative view. Both views contain limit curves plotted in the chart. They indicate the limits for the selected trend. In the absolute view, the limit curves can be moved, and the assigned limit can be changed and saved. In the relative view, they are fixed characteristic values. The alarm value is used as the basis and is always 100%. The other limits are plotted as a factor of the alarm value (warning 70%, acute alarm 150%).

Relative view

The relative view shows the trends as a percentage of the limit. The alarm limit is used as the limit. If the trend value is equal to the alarm limit, the display in the relative view is 100%.

If a trend has no limit value assigned, there will be no curve in the chart of the relative view. In this case, you have to switch to the absolute view or you should define a limit value for the trend.

Absolute view

In the absolute view, the raw values and the unit are displayed. Here, the user can move the limit curves. The limit curves are always the limits for the selected trend. The selected trend is indicated by a blue line. Moving the line changes the limit for the trend. Of course, this can also be done by manually entering the value. The fields can be seen when a trend is expanded.

In the absolute view you can configure multiple Y-axes. Hence, signals with different physical units or significant different value levels can be represented together in one trend chart.