The VarValue column contains the name of a PLC variable or a system variable containing the actual value of the object. System variables are global variables in EPAM that contain specific values such as the actual page ID of the visualization.
Variable names follow a defined syntax.
The Select User Variable context menu enables you to select the variables conveniently from the UserVar worksheet.
When the project is being compiled, a check is made whether all variables used in EPAM are defined in the UserVar list and whether the data type corresponds to the object data type.
Indexed variable addressing
Variable names can be changed during the runtime and read as indices.
See also dynamic variable names
Application:
The indexed variable addressing option, combined with the #Scrollist object, makes it possible to efficiently create parameter lists, such as for any number of axes in a motion control application. In this way, the parameters for several axes, temperature controllers etc. can be entered on only one screen page.