Topic 4.1.1: Overview
- At the most basic level, a Tag is a named value.
- Tags are used to store and manipulate values and their properties, such as minimum and maximum ranges or alarm information.
- Defining tagnames and their properties is done in the InTouch Tagname Dictionary.
- For communication bandwidth, storage size and efficiency, and proper handling, each tag is defined with a specific data type, which confines that tag to a specific usage.
- In runtime, WindowViewer loads and maintains a copy of the dictionary, which is updated with all current values and properties for these tagnames.
- During runtime, an InTouch application accesses the Tagname Dictionary and provides specific tag information via animation links, and InTouch subsystems such as Alarms, History, Security, and scripting.
Last modified: Saturday, 4 January 2020, 3:43 PM