Using the Steel Connections: Truss Chord Node, Single Bar extension, you can generate one of the following connection types:
Options in this Help file refer to the first connection type. The gusset plate - single bar connection is a simplified version (with only one bar) of the first connection type.
At the top of the dialog are 2 selection lists:
You can select a connection name and / or number from these lists or specify a new number or name.
At the bottom are 3 buttons:
Details concerning the calculation algorithms for steel connections can be found in the main Autodesk® Robot™ Structural Analysis help file (see Steel Connection Design).