Chart controls and options

Some of the control and option features in the following description are available only in NiagaraAX-3.1 and later versions.

Many views that present information in a chart have one or more of the following display features and use one or more of the controls and options described in the following list:

Figure 55. Chart view controls and options

Data parameters

These controls include Delta (for history logging) and Time Range settings.
- Delta reporting option
  
  This option is useful for history logging, when you want to display value changes (delta) in your report. Refer to About delta logging for information about delta logging.
- Time range option list
  
  This list has a variety of predefined time range options, including an option that allows you to restrict your data presentation to a particular date and time range that you specify.
On Demand History

Starting in NiagaraAX-3.4, this “play” button icon is available for the History Chart view. Click the button to start On Demand History plotting. The button changes to a “pause” button icon while On Demand History plotting is active. See also, About On Demand history views.
Chart Title

This area of the chart displays the name of the chart. This title is editable in the chart builder view.
Y Axis

Displays units for the y axis.
X Axis

Displays units for the x axis.
Zoom Controls

Zoom controls appear when you drag the mouse cursor left-to-right or top-to-bottom in order to zoom into the plotted data area. Use the zoom control to reduce the magnification amount, or to move the chart left, right, up, or down. You can reduce the zoom level in increments by using the “decrease zoom” icon . You can restore normal view (no zoom) in one click by clicking the “normal view” icon . Zoom Controls in Hx Web profile view are available from a popup menu, shown in Figure 56, that is activated after you click once on the chart area.

Figure 56. Hx chart popup menu (for zoom controls)

The popup menu includes the following control-related menu items:
- Zoom In—zooms in one increment each time you select this menu item.
- Zoom Out—zooms out one increment each time you select this menu item.
- Original View—returns to the non-zoomed display (only available if you have zoomed in).
- Higher Quality—toggles between higher and lower quality graphic display for the chart.
Charted Values

The color of the line and type of line is editable in the Chart Builder view.
Popup menu (Export)

The popup menu displays the PDF Export menu item. This menu item opens the Export dialog box where you can choose to export the chart to PDF, text, HTML, or CSV (comma separated variable).
This export function works only with charts that are using a single history. Multiple histories do not export in a usable format.
Tool Tip

When you “hover” the mouse pointer over the chart, a “tool tip” displays the date, time, and value of that location in the chart. The values are defined by chart axes and not the values of the actual data points. Figure Figure 55.