The invention relates to a method for controlling and/or monitoring a compressor system comprising one or more compressors (11, 12, 13) and one or more peripheral devices (14 to 21). The compressors (11, 12, 13) and peripheral devices (14 to 21) are arranged or connected in a predetermined configuration. The compressor system is controlled and/or monitored by means of a control/monitoring unit (22). The method is characterised in that one or more derived models (Ma, Mb, …) are created on the basis of one or more initial models (M1, M2, …) of the compressor system that are based on a P&I diagram for example, optionally including the specification of the compressors (11, 12, 13) and the peripheral devices (14 to 21). The derived models take into account the operative interrelationships among the individual compressors (11, 12, 13) and peripheral devices (14 to 21), and optionally also dynamic processes. The invention is further characterised in that the one or more derived models (Ma, Mb, ...) form the basis for subsequent control, monitoring, diagnosis or evaluation routines.
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