Method of maintaining safe state of electronic safety-relevant devices with compound safety in case of failure

摘要

The method of maintaining a secure state of safety-relevant fail-safe devices is performed by providing safety-relevant information necessary to perform a safety-relevant activity of a redundant processor portion of an electronic safety-relevant device stored in a nonvolatile memory belonging to the redundant processor portion of the electronic safety-relevant device , when the safety-relevant activity is initiated, it is transferred to the operational volatile memory of the redundant processor portion of the electronic safety-relevant device, and devalued in the nonvolatile memory belonging to the redundant processor portion of the electronic safety-relevant device, wherein the redundant processor portion of the electronic safety-relevant device is in a safe state of failure that the relevant safety-relevant information stored in the operational volatile memory of the given redundant processor portion of the electronic safety-relevant device, thereby ensuring that even if the redundant processor portion of the electronic safety-relevant device is reinitialized, this safety-relevant the information is restored and this safe state is maintained and can only be abandoned by the prescribed service or maintenance procedure.