Patent ID: 6526527
Filing Date: 2003-02-25
Classification: G05B,G06F

Abstract:
Single-processor system for carrying out a required system function, particularly for performing a safety-critical control function, havinga processor unit for carrying out the required system function, and a fault reaction means which monitor the processor system for system faults occurring and have at least two watchdog units which are allocated to the processor unit to monitor faults and which, if a fault is discovered, put the processor system into a predetermined fault reaction state, wherein; the two watchdog units are provided with different watchdog calls which are output by the processor unit depending on program execution; wherein said system includes an actuator driven by said processor unit and putting said processor system into a fault reaction involves a first fault recognition by one of said at least two watchdogs units which recognizes said first fault and puts said actuator into a state which is predetermined for said first fault and a second fault recognition by another one of said at least two watchdog units which recognizes the second fault and puts the actuator into said state which is predetermined.