You can compare the present graph trend with the graph trend for another period for the same set of signals in order to detect similar historic trends and developments.
The original graph period will be displayed in the lower section of the graph while the other graph period will be displayed in the upper section. The Y-axis will be split into the two sections, enabling visual orientation of the graph lines.
Use the Compare Periods property menu to:
You can also use move the X-axis (time period) inside the graph without using the Compare Periods menu: Hold down the left mouse button on the X-axis and move the axis forward or backward. If you want to move both graph periods at the same time, hold down the shift key ↑ while you move one of the x-axes.
In the graph area, right-click either the upper or the lower X-axis to open the Compare Periods menu and move the displayed period for the graph signal of the selected X-axis. Which and how many items the menu contains depend of the previous selections made.
It is not possible to compare periods in Embedded Graphs Basic.
Stand-alone graphs and Operator graphs must be opened in a graph window. Embedded graphs are permanently displayed as part of a diagram.
The Compare Periods button in the graph toolbar must be activated.
|
Menu option |
Description |
|---|---|
| Go Backward |
Move the graph period back by the selected period (hours, days, weeks, months or year). |
| Go Forward | Move the graph period forward (only possible from the start of a graph |
| Go to Now | Return the graph period to the present time from a view on an earlier period |
| Reset Offset | Select this option to reset any adjustment of the compare X-axis and restore the compare x-Axis to the same position of the lower X-Axis. |
| Go to Date | Specify the date and time and move the graph to the date. |
| Change Period |
Select this option to open the Graph Properties form and change the display period of the graph. Only the Period tab of the Graph properties form will be accessible. |
| Compare Periods |
Select this option to compare the present graph trend with the graph trend for another period. The graph area will be divided into two sections, the upper section which can be scrolled individually and the lower section which is scrolled together with the upper section. |
| Single Period | Select this option to revert the graph from a split-sectioned graph used for comparing two graph periods to the original single-period graph. |
| Properties |
Select this option to open the Graph Properties form. Use the New Graph Properties form to define the graph period, the object atoms and appearance of the graph line, the data source to be displayed in the graph, the graph title and the font properties for all graph texts. You can also set up the graph legend properties and chart colors as well enable display of the graph toolbar and status bar. |
See Also