Hanging object (pendant)

Hallo everyone!
Explain me pls, I try to do a hanging object. I have an object “crater” on top (passive rigid body) which is holfing the whole construction. A rope hooks on it, and a bob hooks on the rope.
How to make rope hold the construction phisically correct?
Tried to do the rope as cloth, join by RB Constraint - Point with the bob and the crater. The bob
is an active rigid body.