Realtime trend widget

The real- time trend widget can be used to display the changes of value of a tag. Data is not stored in a trend buffer and cannot be retrieved for later analysis.

To display a real-time trend:

  1. Drag and drop the RealTime Trend widget from the widget gallery to the page.

  1. Attach the tag that you want to sample to the Curve n Value. Data is always plotted against time.
RealTime trend widget properties
Property Description

Num Curves

Number of trend curves to be displayed

Page Duration

Time window to show
End Time

End time of the time window

This parameter can be used to scroll the time window. When zero, the end time is the current system time.
Starting Position Specifies where the curve begin to be drawn when the page is opened (can be left, center or right).
Behavior

Definition of:

  • Min/Max of Y axis
  • Number of tickets to draw on the axes
  • Background image

Text

Trend title and font properties (font size, label, etc.)
Grid Properties of grid presentation (colors)
Cursor Properties of cursor presentation (enable and color)
X Scale Properties of X Scale presentation
Y Scale Properties of Y Scale presentation

Curve "n"

Tag that will be plotted in the trend widget.

  • Select Tag
    select the tag to display

  • Attach To
    select a tag (string) that will contain the name of the tag to display (it is an indexed tag selection)

Tag values can be scaled using the X Forms in the Attach to dialog. See ""Attach to" parameters" for details.