A connection point in a subgraph makes it possible to draw connections between instances of
the subgraph. In the subgraph, the position of the connection point is stated, as well as
the direction in which a connection of the connection point is to be drawn.
A connection point is created by selecting connection point in the tool panel and clicking
MB1 in the working area.
Connection points can only be created in subgraphs.
A connection point is marked with a circle when editing the subgraph. In an instance of the
subgraph, the connection point is not visible.
If the connection is to be connected to connections of type grafcet or routed, the direction
has to be given. It is stated from the object editor.
Each connection point has a number that is unique within a subgraph.