Database Tags

Help Contents


The configuration of database tags influences the behavior and operation of Fernhill SCADA. In this topic we look at:

Tag Types

Fernhill SCADA supports a wide range of database tag types. For example:

Each tag type is constructed from a number of Tag Components. For example:

The tag types are described in the Driver Documentation. Each tag type is documented in four sections:

Tag Folders

A Tag Folder is a container for other tags and folders.

You organize tags using the Tag Window of the Configuration Tool. You can organize tags using folders that best represents a process or equipment.

Tags organized using folders

Icons are used to indicate the type of tag. For example:

Editing Tags

The Tag Window supports these editing tools:

Tag References

Relationships exist between tags, for example:

Tag references can be absolute or relative:

Tag reference examples:

Host TagReferenceTarget TagComment
FolderA.Tag1FolderA.Tag2FolderA.Tag2Absolute reference
FolderB.Tag1FolderA.Tag2FolderA.Tag2Absolute reference
FolderA.Tag1.Tag2FolderA.Tag2Relative reference to FolderA
FolderB.Tag1.Tag2FolderB.Tag2Relative reference to FolderB
FolderA.Tag1..FolderA.Tag3FolderA.Tag3Relative backward reference

When you rename, or move a tag, the Fernhill SCADA Server will automatically update references in other tags.

You can use the Find References tool to quickly find out which tags refer to a tag.

Tag Commands

A Tag Command is a command that you can execute on a tag. For example:

You can execute tag commands from:

Different tag types support different sets of tag commands. Check the Driver Documentation to see which tag types support which tag commands.

Further Information

Fernhill SCADA Concepts

To learn about other Fernhill SCADA Concepts.


For the meaning of terms used in Fernhill SCADA.