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    • 14. 发明授权
    • Analog conversion device and programmable controller system
    • 模拟转换装置和可编程控制器系统
    • US09369145B2
    • 2016-06-14
    • US14425106
    • 2012-10-28
    • Shinichiro Ochiai
    • Shinichiro Ochiai
    • G06G7/00H03M1/12G06F3/06
    • H03M1/12G01D9/005G06F3/0614G06F3/0653G06F3/0683
    • An analog conversion device includes an analog-to-digital (A/D) converter; a shared memory that has an A/D conversion-value storage area for storing the converted digital value and a log storage area for logging a digital value that is stored in the A/D conversion-value storage area and that can be read and accessed from a central processing unit (CPU) that controls an entire programmable controller; a logging execution unit that stores the digital value stored in the A/D conversion-value storage area in the log storage area as logging data; a fixed-number logging detection unit that monitors whether the number of the logging data to be stored in the log storage area has reached a predetermined number since the last interrupt generation request has been made; and an interrupt generation unit that makes an interrupt generation request to the CPU when the number of the logging data has reached the predetermined number.
    • 模拟转换装置包括模数(A / D)转换器; 具有用于存储转换的数字值的A / D转换值存储区域和用于记录存储在A / D转换值存储区域中并可被读取和访问的数字值的日志存储区域的共享存储器 来自控制整个可编程控制器的中央处理单元(CPU); 记录执行单元,将存储在A / D转换值存储区域中的数字值存储在日志存储区域中作为记录数据; 固定号码日志记录检测单元,监视自上次中断产生请求以来,存储在日志存储区域中的记录数据的数量是否达到预定数量; 以及当所述测井数据的数量达到所述预定数量时,向所述CPU发出中断产生请求的中断产生单元。