Methods and structures for utilizing a memory device for a PLC
    2.
    发明授权
    Methods and structures for utilizing a memory device for a PLC 有权
    利用PLC的存储器件的方法和结构

    公开(公告)号:US07813816B2

    公开(公告)日:2010-10-12

    申请号:US11056805

    申请日:2005-02-11

    IPC分类号: G05B11/01

    摘要: Certain exemplary embodiments comprise a method comprising a plurality of activities comprising: at a programmable logic controller comprising a memory device, receiving a request to create a data log that is adapted to receive data from a process; initializing the data log by writing to the data log a head marker code in the record type field of a first record and an invalid code in the record type field of a last record of the data log, the last record logically preceding and logically adjacent to the first record.

    摘要翻译: 某些示例性实施例包括包括多个活动的方法,包括:在包括存储器设备的可编程逻辑控制器处,接收创建适于从过程接收数据的数据日志的请求; 通过向数据记录中写入数据记录中的第一记录的记录类型字段中的头标记代码和数据记录的最后记录的记录类型字段中的无效代码来初始化数据记录,逻辑上前后逻辑上相邻的最后记录 第一个记录。

    Process controller with interchangeable individual I/O units
    4.
    发明授权
    Process controller with interchangeable individual I/O units 失效
    具有可互换的单独I / O单元的过程控制器

    公开(公告)号:US5901323A

    公开(公告)日:1999-05-04

    申请号:US176330

    申请日:1994-01-03

    摘要: A controller of the type used in process control includes a plurality of modular I/O units. The I/O units includes I/O circuits which may be of four basic types: digital input circuits, digital output circuit, analog input circuits and analog output circuits. Each of the I/O circuits has a code generator that generates a binary code indicating the type of I/O circuit. The controller is microprocessor-controlled and periodically communicates with the I/O circuits and determines the type of each I/O unit based upon the binary code. The I/O units may be temperature-compensated based upon the temperature within the housing of the controller, and other integrity checks may be performed on the I/O units. The controller also has a change module routine which allows the I/O units to be installed or removed during operation of the controller.

    摘要翻译: 用于过程控制的类型的控制器包括多个模块化I / O单元。 I / O单元包括可能有四种基本类型的I / O电路:数字输入电路,数字输出电路,模拟输入电路和模拟输出电路。 每个I / O电路都具有代码发生器,其产生指示I / O电路类型的二进制代码。 控制器由微处理器控制,周期性地与I / O电路进行通信,并根据二进制码确定每个I / O单元的类型。 I / O单元可以基于控制器壳体内的温度进行温度补偿,并且可以在I / O单元上执行其他完整性检查。 控制器还具有更改模块程序,允许在控制器运行期间安装或卸下I / O单元。

    Programmed control device for copying machines and the like
    8.
    发明授权
    Programmed control device for copying machines and the like 失效
    用于复印机等的编程控制装置

    公开(公告)号:US4884103A

    公开(公告)日:1989-11-28

    申请号:US109085

    申请日:1987-10-15

    申请人: Hirokazu Yamada

    发明人: Hirokazu Yamada

    摘要: A programmed control device capable of connecting an external memory including a program to be used as a substitute of a main program of the device. The control device and the external memory to be connected thereto have the same data, respectively, to confirm the connection of adequate external memory.

    摘要翻译: 一种编程控制装置,其能够连接包括用作替代所述装置的主程序的程序的外部存储器。 要连接到其上的控制装置和外部存储器分别具有相同的数据,以确认足够的外部存储器的连接。

    Method for confirming incorporation of a memory into microcomputer system
    9.
    发明授权
    Method for confirming incorporation of a memory into microcomputer system 失效
    用于确认将存储器结合到微计算机系统中的方法

    公开(公告)号:US4488257A

    公开(公告)日:1984-12-11

    申请号:US338647

    申请日:1982-01-11

    申请人: Akio Hosaka

    发明人: Akio Hosaka

    摘要: A method of confirming that a memory other than a main memory is incorporated into a computer system, e.g., a microcomputer via a bus comprising the steps of predefining at least one bit line of a parallel bus provided between a receptacle for the memory device and a central processing unit (CPU) so as to impose a logical value, i.e., a "0" or a "1", on the data bus line, that value being the opposite of the predetermined logical value of data stored in a predetermined address of the memory device; operating the CPU to attempt to access the predetermined address of the memory device to read the data stored in the predetermined address of the memory device; and checking to see whether the data read in the central processing unit via the data bus line indicates a value or equal to the predefined value, thus determining that the memory device has or has not been incorporated into the computer. In another method, the bit line is connected via a resistor to an output line. The CPU then imposes a first logical value, and then a second logical value opposite to the first logical value on the bit line, while at the same time trying to access the memory device. If the CPU reads in both cases the value imposed on the bit line by the output line, then the CPU determines that there is no memory device incorporated in the computer.

    摘要翻译: 一种确认除了主存储器之外的存储器的方法通过总线被结合到计算机系统(例如,微计算机)中,包括以下步骤:预定义设置在用于存储器件的插座之间的并行总线的至少一个位线和 中央处理单元(CPU),以在数据总线上施加逻辑值,即“0”或“1”,该值与存储在预定地址中的数据的预定逻辑值相反 存储设备; 操作CPU尝试访问存储器件的预定地址以读取存储在存储器件的预定地址中的数据; 并且检查通过数据总线在中央处理单元中读取的数据是否指示值等于预定值,从而确定存储器件已经或未被并入到计算机中。 在另一种方法中,位线通过电阻器连接到输出线。 CPU然后施加第一逻辑值,然后施加与位线上的第一逻辑值相反的第二逻辑值,同时尝试访问存储器件。 如果CPU在两种情况下都读取输出线上施加在位线上的值,则CPU确定计算机中并没有并入存储器件。