Apparatus and method for testing a control unit

The invention relates to a device (10) and an associated method for testing at least a first control unit (201) by means of a controlled system model, said apparatus (10) at least one first computing unit (101) and a spatially from the first computing unit (101) separate is second arithmetic unit (102), wherein the plant model includes at least one first executable model code and a second executable model code and the first model code to the first arithmetic unit (101) is stored and provided for execution, and the second model code to the second arithmetic unit (102) is stored and provided for execution, and the first processing unit (101) having a first time signal processing means (131) which is adapted to assign a first time stamp (T1) of the global time source (300) electronically to a first event, and by means of the a first event to provide a first computation resulting Nisses be influenced by the first model code, and the second arithmetic unit (102) comprises a second time signal processing means (132) which is adapted to assign the first time stamp (T1) of the global time source (300) electronically a second event, and means the second event a providing a second calculation result by the second pattern code can be influenced.