Trend Window

Help Contents

Introduction

The Trend Window allows you to view and optionally configure trends:

The Trend Window contains the following elements:

An optional title along the top.
The data plot taking up most of the display area.
The list of pens displayed along the bottom.

Trend Types

Two types of trend are supported:

An Temporary Trend, which is a time plot of a tag that you can request at any time.
A Preconfigured Trend. This is a Trend Page Tag that stores the configuration of a trend.

Temporary Trend

To display a temporary trend:

Ensure the Tag Window is active
Right click on a Data Point Tag, which has historic storage enabled.
From the pop-up menu, select Trend

Note: Trends are not supported on string tags.

Preconfigured Trend

A preconfigured trend is a Trend Page Tag stored in the tag database. The Trend Page Tag stores these trend parameters:

The trend title.
The X Axis time scale.
The font face and size of text displayed in the trend.
Which Data Point Tags are plotted.
Which attributes are displayed with each pen.

To create a new preconfigured trend:

In the Tag Window, right-click on a folder and select Add New Tag, followed by Core, then Trend. This will create a new trend tag in the tag database.
To set the name of the trend tag do one of the following:
- Press Return to accept the default name.
- Enter a name of your choice, then press Return.
To edit the trend do one of the following:
- Right click on the trend tag and select Edit Trend, or
- Double click on the trend tag.
In either case the Trend Window will open.
Choose the tag you want to display on the trend and drag it on to the trend window.
Note: Only Data Point Tags with historic storage enabled can be added to a trend.
Click the Save button to save the trend definition to the tag database.

To edit an existing preconfigured trend do one of the following:

Right click on the trend tag in the Tag Window and select Edit Trend, or
Double click on the trend tag in the Tag Window.

Editing Trends

Using the Trend Window you can do any of these edit operations:

Edit the Trend Title
Change Text Sizes or Font Faces
Add a Pen to a Trend
Locate the Data Source of a Pen
Remove a Pen from a Trend
Change the Order of Pens in a Trend
Change the Attributes Displayed with Each Pen

Edit the Trend Title

To edit the trend title:

Click on the data plot area of the trend.
In the Title section of the Properties Window, enter a new value for any of these properties:
- Title
- TitleColor
- TitleFontFamily
- TitleFontSize

Change Text Sizes or Font Faces

To change font faces or text sizes:

Click on the data plot area of the trend.
In the Text Styles section of the Properties Window, enter a new value for any of these properties:
- AxisFontFamily
- AxisFontSize
- PenFontSize
- PenFontSize

Add a Pen to a Trend

To add a pen to a trend:

Select the Data Point Tag you want to add in the Tag Window.
Drag the tag onto the trend.

Locate the Data Source of a Pen

To locate the data source of a pen in a trend:

Select the pen in the trend.
Right click and select Show in Tag Window.
The Data Point Tag will be selected in the Tag Window.

Remove a Pen from a Trend

To remove a pen from a trend:

Select the pen in the trend.
Right click and select Remove.

Change the Order of Pens in a Trend

To change the order of pens in a trend:

Select the pen in the trend.
Drag the selected pen to its new position.

Change the Attributes Displayed with each Pen

Pen attributes provide additional information about the data source. For example:

The Scale of the Y Axis.
Which Y Axis the pen is associated with (Left, Right or None).
The status of the pen.

To change the attributes displayed with each pen:

Select the pen in the trend.
Right click and toggle any of these options:
- Show Scale
- Show Y Axis
- Show Status

Configuration Properties

The Trend Window allows you to change these properties:

Trend Properties - properties that apply to the entire trend.
Pen Properties - properties that apply to each pen.

Trend Properties

To edit Trend Properties select the plot area of the trend.

When the data plot area is selected, you can change these in the Properties Window:

Title
	Title	The text that appears at the top of the trend.
	TitleColor	The color of the title.
	TitleFontFamily	The font family of the title.
	TitleFontSize	The size of the title text.
X Axis Defaults
	XAxisInterval	The time span of the X axis when the trend is opened.
	XAxisOffset	The offset of the current time indicator from the right Y axis.
	XAxisTracking	When set to True, the trend moves the X axis with current time.
Text Styles
	AxisFontFamily	The font family used for text on the X and Y axes.
	AxisFontSize	The size of the text used on the X and Y axes.
	PenFontFamily	The font family used to display each pen at the bottom of the trend.
	PenFontSize	The size of the text used to display each pen at the bottom of the trend.

Pen Properties

To edit Pen Properties select a pen at the bottom of the trend.

When a pen is selected, you can change these in the Properties Window:

Properties
	Color	The color of the pen.
	Label	The label to display in the pen at the bottom of the trend.
	Source	The Data Point Tag that provides the data for the pen.

Further Information

Graphics Trend Tag

For information about storing trend definitions in the tag database.

Data Tags

For information about tags that store data historically.

Fernhill SCADA Configuration Tool

To learn about the Fernhill SCADA Configuration Tool.

Glossary

For the meaning of terms used in Fernhill SCADA.