Topic 13.3.1: Indirect Tag
-
Indirect Tags
- Using indirect tags, you can create applications with window objects that show values from multiple tags. Indirect tags are tags that can act on behalf of another tag. In the programming world, these are called pointers. You can point indirect tags at direct tags and then use the indirect tags as if you were using the direct tags.
- Using indirect tags reduces your application development time. Instead of creating a separate set of tags and window objects for each process component, you can create applications with window objects that show values from multiple tag sources.
- Key Points
- Indirect tags can be equated to integer and real tags. Indirect tags can be mapped to any other tag as long they are the same tag type.
- When you equate an indirect tag to another source tag, the indirect tag behaves as if it is the source tag. If the value of the source tag changes, the indirect tag reflects the change. If the indirect tag's value changes, the source tag changes accordingly.
- You can use scripts to assign input source tags to an indirect tag. The script can be triggered by an application event or an operator action like clicking a window button.
- You can assign retentive attributes to indirect tags. With retention, the indirect tag retains its most recent tag assignment when the InTouch application starts again.
Last modified: Tuesday, 31 March 2020, 11:15 AM