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Configuring the X-axis with an Absolute Time Span
You configure the time span of a trend chart X-axis to display the records that are recorded within a specific period of time.
The x-axis of the trend chart represents time. The time span of the axis can be set with a fixed start and end time or with an end time relative to the present time. The axis can be quick-scaled to show the last hour, last day, last month, or last year.
The y-axis refers to the measurement unit that the variable represents. The scale of the y-axis can be set manually or by auto scale. You can configure the trend chart to present series on one y-axis or two y-axes, one to the left and one to the right. Use two y-axes to present series with different ranges in the same trend chart.
To make reading easier, grid lines can be shown in the trend chart. Grid lines can be shown in both the x- and y-direction, independent of each other.
In WebStation, in the System Tree pane, select the trend chart you want to configure.
On the Trend Chart toolbar, click the Settings button
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In the Settings dialog box, click the X axis tab.
In the Time mode box, select Absolute (start and end time) .
In the Start time box, type the X-axis leftmost date and time.
Click OK .
Click Save .
The X-axis is now configured with an absolute time span.
Trend Chart Axes in WebStation
Configuring the X-axis with a Relative Time Span
Showing Trend Chart Grid Lines
Manually Configuring the Y-Axis Scale
Automatically Configuring the Y-axis Scale
Saving Current Trend Chart Settings
Trend Chart View
Trend Chart Toolbar
Trend Chart Settings Dialog Box – X Axis Tab