Connect a variable to a function block

After you add a variable, you can connect it to a function block (FB) and use it to control a parameter. For more information about how to add a variable, see Add variables.

1. In the Local variables pane, drag a variable to the source editor.



2. In Var type, you need to decide whether the variable is used as an input or output. Click Input and click OK.



3. The variable has been added to the source editor. Drag the variable until it is close to the Execute parameter in the FB.





4. The variable is connected to the Execute parameter.



5. You can add another variable and connect it to another parameter. Notice that you need to give a variable an initial value if the parameter this variable controls requires it. In this guide we connect the Position variable to the Position parameter. Since the Position parameter needs a value, we assign an initial value to the variable for the parameter to use.