Impact of 2oo3 Architecture Recovery on the Safety Integrity of a Safety Function

One of the basic features of a safety function is the safety integrity level. This feature also affects the technical solution of the system that implements the safety function. One of the parameters that affect the safety integrity of a safety-relevant system is its recovery to the original state after a failure has occurred. The method of recovery a safety-relevant system after the occurrence of a failure to its original state depends not only on its technical solution, but also on the method of its operation. The paper deals with the influence of various methods of recovery on the safety integrity of the safety function, which is implemented by an electronic safety-relevant system with a 2oo3 architecture.