The invention relates to an assembly for detecting state changes. The invention relates to a method for detecting state changes in an assembly (1) having a first device (2) upon which the state changes act having a first processing unit (4) and a second device (5) upon which the state changes act having a second, similar processing unit (7) and a superordinate computer (9) connected to the processing units (4, 7). In the method according to the invention, command signals of the superordinate computer (9) are forwarded to the processing units (4, 7) by means of a communication module (8) connected between the superordinate computer (9) and the processing units (4, 7) and a signal exchange between the processing units (4, 7) with processes running in a temporally offset manner in the devices (3, 5) has the effect that the superordinate computer (9) is acted upon by time-synchronous output signals (A1, A2) of the processing units (4, 7), including in the case of the processes in the devices running in a temporal
