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    Extension of an interface

    You can extend interfaces just like function blocks. The interface is then also given the interface methods and interface properties of the basic interface in addition to its own.

    Procedure. Creation of an interface that extends another interface.

    1. In the device tree, select the Application object.

    2. Click Project → Add Object → Interface.

      The Add Interface dialog opens.

    3. Specify a name for the new interface.

    4. Select the Extends option and then click the _cds_icon_input_assistent.png button.

    5. The Input Assistant opens.

    6. From the category Interfaces, select the interface that is to be extended by the new interface.