Tags work naturally and easily with Ignition to offer the following features:
The easiest way to create a tag is from the OPC Browser. But you can also create tags manually using the menu items, or by converting a tag type to a new type.
Tags can be named anything (inside the rules of allowed characters). In other words, it is not necessary that tag's name be related at all to its underlying data source (opc path, for instance). This provides a level of indirection that is convenient for systems whose underlying data storage changes, is based on tag codes (N7, F8, etc.), or for system with many repeat tag structures. By providing tags with meaningful names and arranging them in hierarchical folders, indirect binding can be used to create robust screens that can be used for multiple systems.
See Keeping Tags Organized for more information about renaming and setting up Tag structures.
Certain settings or tag configurations are visually represented next to the tag in the Tag Browser
This icons simply allow you to note some important settings on the tag at a glance. A description of the icons are listed below.
|Scaling||The Scale Mode property under the Numeric section of the Tag Editor has been set to a value other than None. The value on the tag will be scaled to some degree.|
|Alarming||At least one alarm has been configured on this tag.|
|Custom Access Rights||The Access Rights property has been set to Custom. Some users or security zones may be unable to read from or write to this Tag due to the security settings.|
|Tag History||This tag has been configured to log data into the Tag Historian system.|
|Tag Event Script||At least one Tag Event Script has been enabled on this Tag.|