Value
A read connection. Assign a tag or expression that can support up to 82 characters (bytes). The application reads the value of the Value connection’s tag at the data source to determine the string to show.
If you assign an expression, the application calculates the value of the expression and updates the string display to reflect the value.
Configure the string display appearance
How the string display works at run time
Columns on the Connections tab of a graphic object's Properties dialog box