A method is provided for controlling a gear ratio change in a hydrostatic drive machine. The system comprises a user-side circuit, a central crosspoint switch, a plurality of computer-side circuits, a menu generating unit and a first switching device. The timing of a resource assignment reconfiguration is based on a job execution schedule, which is associated with a predetermined configuration, and which is executed by a computer utilizing the logical partition. Emission beam reflects off a second 45 mirror prior to reaching detector, while emission beam travels directly to.