A plurality of turbo engines (1, 2, 3) cooperate in a station, and each turbo engine with the drive machine (4, 5, 6) driving it forms a machine unit, with which a machine controller (28, 29, 30) is associated. To control these turbo engines (1, 2, 3) in parallel or tandem operation to observe at least one process variable, which is preset by the station and is common to all turbo engines (1, 2, 3), the preset, common process variable is set directly to each of the machine controllers (28, 29, 30), and this preset, common process variable is controlled exclusively via the machine controllers (28, 29, 30) associated with the particular machine unit.
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