is there a plugin.setTimelimit(900); for the Class CalculatorPlugin
Or how can I make sure that the whole calculation runs for a set timelimit?
Or should I use the conformer plugin?
There is no setTimelimit(int) method in GeometryPlugin. Please use ConformerPlugin to generate conformers with specified time limit, and then use GeometryPlugin for calculating geometrical properties. If the input molecule has 3D coordinates, then - by default - GeometryPlugin will use those coordinates and will not clean the molecule in 3D again.
That is actually nice, as I understand the 3D Geometry plugin is just used for the energy values but as courtesy also
calculates 3D coordinates.
Yes, this is how it works.