Method for controlling a print processing installation provided for producing printed products, which has several individual devices that may be exchanged, arranged in series one after the other and/or parallel to each other and connected to a joint control device, for adjusting to different work orders following one after the other, in which the joint control device is provided with information regarding the type of the individual devices contained in the print processing installation and regarding their respective position in the print processing installation via a data processing network and controls the individual devices based on this information, in which the information regarding the position of the individual devices in the print processing installation is determined based on their respective position in a first data processing network made as ring wiring, characterised in that for this a corresponding data telegram (y) is passed on from the individual devices via a second data processing network to the joint control device respectively, in which • after the print processing installation is started, at the request of the joint control device the individual devices incorporated in it emit a first data telegram (y) for identifying the individual devices via the second data processing network to the joint control device respectively, • then a first discrete signal (x) is emitted by the joint control device via the first data processing network to an individual device located in a first position in the first data processing network, • this individual device detects the first discrete signal (x) and then emits a second data telegram (y) for receiving the first discrete signal (x) via the second data processing network to the joint control device, • the joint control device determines the position of this individual device based on the second data telegram (y) and emits a third data telegram (z) to the first individual device, • the first individual device generates a second discrete signal (x+1) based on the third data telegram (z) and emits it via the first data processing network to an individual device arranged following it, • this process is repeated over all the individual devices of the print processing installation arranged in series one after the other, in which a further discrete signal (x+2, x+3,...) is generated respectively and emitted via the first data processing network to an individual device of the print processing installation arranged following it, in which an individual device located in a last position in the first data processing network produces a last discrete signal (x+n) corresponding to the nth position of this individual device and emits it via the first data processing network to the joint control device, and • after the last discrete signal (x+n) is received and evaluated, the joint control device triggers the control of the individual devices with further data telegrams (z) via the second data processing network. • after the print processing installation is started, at the request of the joint control device the individual devices incorporated in it emit a first data telegram (y) for identifying the individual devices via the second data processing network to the joint control device respectively, • then a first discrete signal (x) is emitted by the joint control device via the first data processing network to an individual device located in a first position in the first data processing network, • this individual device detects the first discrete signal (x) and then emits a second data telegram (y) for receiving the first discrete signal (x) via the second data processing network to the joint control device, • the joint control device determines the position of this individual device based on the second data telegram (y) and emits a third data telegram (z) to the first individual device, • the first individual device generates a second discrete signal (x+1) based on the third data telegram (z) and emits it via the first data processing network to an individual device arranged following it, • this process is repeated over all the individual devices of the print processing installation arranged in series one after the other, in which a further discrete signal (x+2, x+3,...) is generated respectively and emitted via the first data processing network to an individual device of the print processing installation arranged following it, in which an individual device located in a last position in the first data processing network produces a last discrete signal (x+n) corresponding to the nth position of this individual device and emits it via the first data processing network to the joint control device, and • after the last discrete signal (x+n) is received and evaluated, the joint control device triggers the control of the individual devices with further data telegrams (z) via the second data processing network.