Trend Window

Introduction

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

Trend window showing two tags

Two types of trend are supported:

Ad-hoc Trend

To display an ad-hoc trend:

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

Note: Trends are not supported on string tags.

Preconfigured Trend

A preconfigured trend is a Trend Tag in the tag database. The Trend Tag stores the configuration of the trend, for example which Data Tags are plotted, the X Axis timescale, and the title.

To create a new preconfigured trend:

  1. 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.
  2. Press Return to accept the default name of the trend tag, or enter a name you choose and then press Return.
  3. To edit the trend do one of the following: In either case the Trend Window will open.
  4. Choose the tag you want to display on the trend and drag it on to the trend window.
    Note: Only Data Tags with historic storage enabled can be added to a trend.
  5. Click the Save button to save the trend definition to the tag database.

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

Add a Pen to a Trend

To add a pen to a trend:

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

Remove a Pen from a Trend

To remove a pen from a trend:

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

Change the Pen Order in a Trend

To change the order of pens in a trend:

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

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 definitions of the terms used in Fernhill SCADA.