Methods and an arrangement for immersive human computer interaction with a virtual mechanical operator of an industrial automation arrangement in virtual reality, wherein input information is transmitted to a component of the arrangement through the interaction with the virtual operator modelled in a simulation device for a rigid-body simulation, where the virtual operator is replicated in the virtual reality, an interaction with the represented virtual operator is detected by the virtual reality environment, second parameters calculated from first parameters of the detected virtual interaction are transmitted to the simulation device and used via the modelled virtual operator to simulate movement of a part of the operator, whether a switching state change of the virtual operator is produced by the simulated movement is decided, and where the switching state or the switching state change is reported as the input information to the component at least when a switching state change occurs.