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热词
    • 6. 发明授权
    • Function block implementation of a cause and effect matrix for use in a process safety system
    • 功能块实现用于过程安全系统的因果矩阵
    • US06898468B2
    • 2005-05-24
    • US10401655
    • 2003-03-28
    • Michael OttGary LawDennis StevensonRobert HavekostJulian NaidooGodfrey R. Sherriff
    • Michael OttGary LawDennis StevensonRobert HavekostJulian NaidooGodfrey R. Sherriff
    • G05B9/02G05B11/01
    • G05B9/02
    • A cause and effect function block, which can be easily integrated into a function block diagram programming environment in a process plant safety system to implement the cause and effect logic specified by a traditional cause and effect matrix, includes a set of cause inputs and a set of effect outputs. A multiplexer within the cause and effect function block receives each of the cause inputs and is coupled to one or more state machines, with a separate state machine existing for each effect output. The multiplexer decodes each of the cause inputs and, based on the cause inputs and previously identified cause and effect matrix logic, provides a trip signal to one or more of the state machines. Upon receiving a trip signal, a state machine forces an associated effect output into a tripped or safe state. If desired, the state machine may then use one or more other signals, such as signals from a user or from the process, to transition between a set of different states used to safely return the process plant back to the normal operating state from the tripped or safe state.
    • 一个因果函数块,可以轻松地集成到一个过程工厂安全系统的功能框图编程环境中,以实现由传统因果矩阵指定的因果逻辑,包括一组原因输入和一组 的效果输出。 原因和效果功能块内的多路复用器接收每个原因输入,并且耦合到一个或多个状态机,其中存在用于每个效果输出的单独的状态机。 多路复用器解码每个原因输入,并且基于原因输入和先前识别的因果矩阵逻辑,向一个或多个状态机提供跳闸信号。 在接收到跳闸信号时,状态机强制相关联的效果输出进入跳闸或安全状态。 如果需要,状态机可以然后使用一个或多个其他信号,例如来自用户或来自过程的信号,以在用于将处理设备安全地从处理器返回到正常操作状态的一组不同状态之间转换 或安全状态。