Creating interfaces
Just as with function blocks in the PLC environment, faceplates also have an interface, by which information is passed into the faceplate.
There are two types of interfaces in faceplates, as outlined here:
- Tag interface: Connectss HMI tags to the faceplate
- Property interface: Sets properties of objects and elements in the faceplate
By using these two types of interfaces, faceplates can be customized both in the data that the faceplate has access to and the behavior of internal screen objects via their properties.
Tag interface
Tag interface is accessed by clicking the tab in the top right of the main window, as illustrated in the following screenshot:
Figure 11.6 – Tag interface tab
This tab contains interface elements that allow the parent screen to pass data types and associated values to the faceplate.
When passing information to the faceplate from the parent screen, the Faceplate instance must be...
