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    • 9. 发明公开
    • Hard-wired controller/monitor
    • Festverdrahtetes Regel- /Kontrollgerät。
    • EP0487210A2
    • 1992-05-27
    • EP91309777.0
    • 1991-10-21
    • UNITED KINGDOM ATOMIC ENERGY AUTHORITY
    • Fast, Bryan
    • G05B19/045G05B23/02
    • G05B11/06G05B19/045
    • A hard-wired circuit (25) is provided for controlling or for monitoring a plant or process (12). The circuit incorporates means (14) to sense the current state of the process, an input encoder (16) to generate multi-digit binary coded signals representing that sensed state, and an output encoder (18) to generate multi-digit binary output coded signals corresponding to the signals from the input encoder (16), which output signals can be used to control process or plant actuators. Both the input encoder (16) and the output encoder (18) may be PROMs. A complement modulator (20) activated by an oscillator (24) may be used to provide dynamic output signals; and by means of appropriate comparators (26, 38) and watchdogs (28, 40) the input and output coded signals may be verified.
    • 提供了用于控制或监视工厂或过程(12)的硬连线电路(25)。 该电路包括用于感测过程的当前状态的装置(14),用于产生表示该感测状态的多位二进制编码信号的输入编码器(16)和用于产生多位二进制输出编码 对应于来自输入编码器(16)的信号的信号,其输出信号可用于控制过程或工厂致动器。 输入编码器(16)和输出编码器(18)都可以是PROM。 由振荡器(24)激活的补码调制器(20)可用于提供动态输出信号; 并且通过适当的比较器(26,38)和看门狗(28,40),可以验证输入和输出编码信号。