Controller
The topics in this chapter provide information about the system variables that are available for the following controllers:
Access to system variables and data structures
Some system variables of the controllers are organized as data structures. The data structure of such a system variable contains further system variables.
In the 'Init Value Configuration' editor of PLCnext Engineer you can see which members
belong in detail to a system variable organized as a data structure. To open the 'Init Value Configuration' editor for a system variable organized as a data structure, select the context menu item 'Show Init Value Configuration' of the system variable in the Data List of the controller or click the 
icon on the editor's toolbar. The 'Init Value Configuration' of the selected STRUCT system variable is opened below the Data List editor.