Abstract: The user interface contains a project window (9, 90, FIGS.2, 3) for interfaces (clips) of a programmable controller and programming windows (20, FIGS. 4, 10, 13; 67, FIG. 16) for each output interface of the programmable controller. Each such programming window (20, 67) contains a base node as a first graphical operating element (21, FIG. 10; 68, FIG. 16) for the output interface of the particular programming window and at least one additional node which serves as a graphical operating element (35, 47, 49, 51, 53, FIG. 10) for another interface (clip) or for a group of linked interfaces of the programmable controller. Each node has an output branch line (44, 48, 50, 52, 54, FIG. 10), the end of which can be routed to the base node or to another node be means of an operating means, such as a mouse. After the end of the output branch line is deposited on a respective other node, both a graphical link between the nodes and a control-system link between the interfaces which the nodes represent (FIG.

Abstract: The user interface contains a project window (9, 90, FIGS. 2, 3) for interfaces (clips) of a programmable controller and programming windows (20, FIGS. 4, 10, 13; 67, FIG. 16) for each output interface of the programmable controller. Each such programming window (20, 67) contains a base node as a first graphical operating element (21, FIG. 10; 68, FIG. 16) for the output interface of the particular programming window and at least one additional node which serves as a graphical operating element (35, 47, 49, 51, 53, FIG. 13) for another interface (clip) or for a group of linked interfaces of the programmable controller. Each node has an output branch line (44, 48, 50, 52, 54, FIG. 13), the end of which can be routed to the base node or to another node by means of an operating means, such as a mouse. After the end of the output branch line is deposited on a respective other node, both a graphical link between the nodes and a controlsystem link between the interfaces which the nodes represent (FIGS.