Adding a variable to a program

Start editing the real-time application.
In the menu bar, click Program.
On the worksheet, click Add.
Select the tab local variable, global variable or Data storage.
In the drop-down list, mark the variable.
Click OK.

If a Program Organisation Unit written in Function Block Diagram contains multiple networks, the order of execution depends on the last element's position on the worksheet:

From top to bottom.
On the same level from left to right.

Drag-and-drop the variable to the desired position in the worksheet.