You can use Mimic parameters in an expression. They are needed when you are creating embedded Mimics that need to be generic i.e. symbol Mimics that are not associated with any particular database item. For more information, see Parameters in the ClearSCADA Guide to Mimics.
Example:
An embedded Mimic called 'Quality Display' is created. It has a parameter called CurrentQualityDesc that is associated with the Value property of a text box. The following expression is used to animate the Value property:
"Parameter:CurrentQualityDesc"
The 'Quality Display' Mimic is embedded on another Mimic. The CurrentQualityDesc property of a point named 'AI1' is associated with the parameter of the embedded 'Quality Display' Mimic. The CurrentQualityDesc value of the 'AI1' point is displayed in the text box.
You can use the browse button in the Expression window to insert a parameter in your expression (see Selecting a Parameter). Alternatively, you can enter the parameter manually (see Syntax of a Mimic Parameter Tag).