CPU diagnosis system, method and device and medium

Abstract

The invention discloses a CPU diagnosis system, method and device and a medium, and is applied to the field of electronics, the system comprises a plurality of CPUs, the CPUs are connected with one another through interfaces so as to transmit operational data, each CPU is connected with a memory for storing operational data of the CPU and operational data of the other CPUs, wherein the operation data is obtained by executing the same operation task by each CPU; the CPUs can obtain the operational data and can also judge whether the operational data of different CPUs are consistent or not, and if yes, it is judged that the CPUs can work normally; and if not, it is judged that the CPUs cannot work normally. According to the CPU diagnosis system provided by the invention, the operation results of the plurality of CPUs are stored in the memory for comparison, operation synchronization of the plurality of CPUs is not needed, the implementation technology is relatively simple, and the diagnosis difficulty of the CPUs is reduced; and meanwhile, the CPU diagnosis system does not need to additionally add a hardware comparator, so that the cost is reduced.

Description

technical field [0001] The present application relates to the field of electronics, in particular to a CPU diagnosis system, method, device and medium. Background technique [0002] In safety instrumentation system (Safety instrumentation System, SIS), in order to meet the requirements of safety integrity level 3 (SIL3) of IEC61508-2 or GB / T 20438.2 functional safety standard, the system usually adopts redundant architecture design, in the 1oo2D architecture In the SIS, the fault margin of the hardware is 1, and according to the requirements of the safety standard for the system, the diagnostic coverage of the system needs to reach more than 90%. [0003] At present, conventional SIS diagnosis CPU generally adopts the method of hardware comparator, figure 1 It is a schematic diagram of the system architecture of the hardware comparator; figure 1 As shown, the diagnosis method of the hardware comparator is to carry out the same operation through two fully synchronous CPUs 1...

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