8306A 扩展/ RXM机架电源安全故障的模型描述。图3-1显示了安全假跳闸的马尔可夫模型。请注意，该图是使用参考文献5中描述的方法开发的。Tricon TMR是一种故障安全型PLC，具有三重输入(3-2-0)、 带通信的三重冗余主处理器和四重输出表决器。根据参考文献1的要求，Markov模型包括主处理器、 数字输入模块、模拟输入模块、数字输出模块和模拟输出模块。除了每个输入/输出微处理器，弥可夫模型还包括每个输入/输出电路。还包括双电源。弥可夫模型中的第 一个状态是系统正常运行，没有故障。中间状态是当各种模块的一一个通道失效时。当第二次故障导致系统虚假跳闸时，后一种状态是。从一种状态转移到另- -种状态的概率(即故障或修复的概率)用箭头表示。请注意,恒定的故障率和修复率是假设的
Model description of safety faults. Figure 3-1 shows the Markov model for safety false tripping. Please note that the figure was developed using the method described in reference 5. Tricon TMR is a fail safe PLC with triple inputs (3-2-0), a triple redundant main processor with communication, and a quadruple output voter. According to the requirements of reference 1, the Markov model includes a main processor, a digital input module, an analog input module, a digital output module, and an analog output module. In addition to each input/output microprocessor, the Mikov model also includes each input/output circuit. Also includes dual power supply. The first state in the Mikov model is that the system is operating normally without any faults. The intermediate state is when one channel of various modules fails. When the second fault causes the system to trip falsely, the latter state is. The probability of transitioning from one state to another (i.e. the probability of failure or repair) is represented by an arrow. Please note that a constant failure rate and repair rate are assumed
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