ControlLogix supports several internal data types, such as:

•Boolean, Bit, Float, Real, Signed, Unsigned, Int, etc.

•Default array types (one, two, or three dimensions)

•Logix's pre-defined structures: Timer, Counter, Axis, SFC_Step, etc.

•User-defined structures

•Arrays of structures

•Any combination of all previously described types

If users opted by disabling the Import each property as individual tags option or if they are using Elipse SCADA, each variable inside a structure or array is mapped to a Block Element. Variables inside Tasks are inserted into folders or Blocks with the same Task's name. Data types for each variable are defined in the controller and automatically adapted, therefore users do not need to define data types for each Tag.

If the Import each property as individual tags option is selected, all Tags are created in an independent way without using Blocks, following the same data structure created in the controller.