Patent ID: 6934874
Filing Date: 2005-08-23
Classification: G05B

Abstract:
1. An electronic control system having at least first, second and third mutually communicating control units and a memory, wherein for transmission of a control-related signal from the first control unit to the second control unit: the first control unit generates the control-related signal and a second signal complementary thereto on different paths and, sends them to the memory, together with two additional signals, which are indicative of the respective different paths; the third control unit reads out the control-related and complementary signals and the additional signals from the memory, and checks them, and i) upon detection of an error in said signals, switches off the first control unit or, ii) if said signals are correct, generates different types of test or safety signals and sends them to the memory; and the first control unit reads out the test or safety signals from the memory and checks them and, i) upon detection of an error in said test or safety related signals, switches itself off, or ii) if the test or safety signals are correct, emits the control-related signal and at least a prescribed selection of the test or safety signals, for transmission to the second control unit.