The Database Bar contains a hierarchical view of the ClearSCADA database. You can drag an item from the Database Bar onto the Function Block Diagram to create a variable for the item.

The variables tabs contain a list of the values that are included in the Function Block Diagram. The Direct tab contains the values that are associated with database items, and the Internal tab contains a list of internal variables such as function blocks (see Add Variables to a Function Block Diagram).

The Function Block Diagram contains the functions, function blocks, variables, constants, etc. form the Function Block Diagram. This is where you create the Logic of the Function Block Diagram (see Configure the Display Settings for Graphical Logic Programs).

The compiler display is where ClearSCADA displays diagnostic information for your Function Block Diagram. Messages associated with compiling and debugging are shown here (see Compiling a Function Block Diagram or Function Block Library).