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    • 1. 发明授权
    • Field apparatus
    • 现场设备
    • US07245976B2
    • 2007-07-17
    • US10480122
    • 2002-06-06
    • Masato KurodaYasuo KumedaShinichi AkanoFumio Nagasaka
    • Masato KurodaYasuo KumedaShinichi AkanoFumio Nagasaka
    • G05B9/02G06F11/00G01R31/08H02H3/00H04L12/50
    • G05B19/0428G05B2219/24054
    • A field apparatus for controlling a controlled element includes a diagnosis unit for diagnosing abnormality of the field apparatus and/or the controlled element and a bidirectional digital communication device to send a digital signal which shows a diagnosis result to outside and to receive a digital signal from outside in order to execute a control of the controlled element. Other predetermined functions are effected based on a command signal in the form of an analog signal received from outside by a analog communications device of the apparatus. Electric power for operation is supplied through a switching means that can switch either a electric power that is supplied by the analog communications device or a electric power that is supplied by the bidirectional digital communication device.
    • 用于控制受控元件的现场设备包括用于诊断现场设备和/或受控元件的异常的诊断单元和双向数字通信设备,以向外部发送显示诊断结果的数字信号并从其接收数字信号 外部以便执行受控元件的控制。 基于由设备的模拟通信设备从外部接收的模拟信号的形式的命令信号来实现其他预定功能。 用于操作的电力通过可切换由模拟通信设备提供的电力或由双向数字通信设备提供的电力的开关装置提供。
    • 3. 发明授权
    • Communication system having designated transmission lines
    • 具有指定传输线的通信系统
    • US4463350A
    • 1984-07-31
    • US349108
    • 1982-02-16
    • Koichi KajiuraKozo EdanamiSeiji OnokiTatsuya IzuminaYasuo Kumeda
    • Koichi KajiuraKozo EdanamiSeiji OnokiTatsuya IzuminaYasuo Kumeda
    • H04L1/22H04B1/74H04L12/26H04L12/40H04L29/14H04Q11/04H04J3/02H04J3/14
    • H04L12/40182H04L12/403
    • A communication system is provided in which a plurality of communication devices communicate with one another over a plurality of transmission lines. One of the communication devices operates as a master station, while the remaining devices are slave stations. The master station periodically transmits transmission line specifying signals which specify or identify which of the transmission lines is to be used by the devices for communicating with one another. The master station, when operating normally, will periodically change the transmission line in use so that each of the plurality of transmission lines is used in turn and for substantially similar periods of time. At such time as any one of the slave stations detects a problem in a transmission line in use, that slave station will transmit an abnormality detected signal. The master station, in response to the receipt of such an abnormality detected signal, will transmit a transmission line specifying signal which specifies for use transmission lines other than the one which has been identified as having a problem. Thus, only transmission lines that are functioning properly are used to transmit and receive signals between communication devices of the system.
    • 提供一种通信系统,其中多个通信设备通过多条传输线路彼此通信。 通信设备中的一个作为主站工作,而其余设备是从站。 主站周期性地发送指定或识别用于彼此通信的设备将要使用哪些传输线的传输线指定信号。 主站在正常工作时将周期性地改变使用中的传输线,使得多个传输线中的每一个依次使用和基本相似的时间段。 在任何一个从站检测到使用中的传输线路中的问题时,该从站将发送异常检测信号。 主站响应于接收到这种异常检测信号,将发送指定用于使用除了被识别为有问题的传输线之外的传输线的传输线指定信号。 因此,只有正常运行的传输线用于在系统的通信设备之间发送和接收信号。
    • 6. 发明授权
    • Apparatus and method for identification of message initiation in a
process control network
    • 用于识别过程控制网络中的消息发起的装置和方法
    • US4872186A
    • 1989-10-03
    • US121561
    • 1987-11-17
    • Paul B. GerhartYasuo Kumeda
    • Paul B. GerhartYasuo Kumeda
    • H04L25/38H04L20060101H04L1/00H04L7/04H04L25/48
    • H04L1/0083
    • In order to insure the accuracy of information transmitted over a network, the initiation of the message must be unambiguously identified. In the present invention, the intermessage spacing consists of a series of identical logic signals that exceeds a minimum value distinguishing this interval from a message character. The message character has predefined length, with a start bit position logic signal and a stop bit position logic signal bounding the character that has the same number of predetermined logic signals for every message character. The character has at least one additional non-data bit position that has a first logic signal for the initial character of a message and the complementary logic signal for the remaining characters in the message.
    • 为了确保通过网络发送的信息的准确性,消息的发起必须被明确地识别。 在本发明中,间隔间隔由一系列相同的逻辑信号组成,该逻辑信号超过区分该消息字符的最小值。 消息字符具有预定义的长度,具有开始位位置逻辑信号和限制对于每个消息字符具有相同数量的预定逻辑信号的字符的停止位位置逻辑信号。 该字符具有至少一个附加的非数据位位置,其具有用于消息的初始字符的第一逻辑信号和用于消息中剩余字符的互补逻辑信号。
    • 7. 发明授权
    • Method and apparatus for controlling memory access by a plurality of devices
    • 用于控制多个设备的存储器访问的方法和装置
    • US06480945B2
    • 2002-11-12
    • US09350624
    • 1999-07-09
    • Yasuo Kumeda
    • Yasuo Kumeda
    • G06F1214
    • G06F9/544
    • When each access apparatus is to update its own data written in a common memory device, the transmitting unit of each access apparatus transmits the previous data previously written in the memory device and new data to be newly written in the memory device as a pair of data via a bus. Upon receiving the pair of data from the access apparatus, a determination unit in the common memory device determines whether the data stored in a memory coincides with the previous data received from the access apparatus. If these two data coincide with each other, the data in the memory is rewritten into the new data; otherwise, a data update in the memory is rejected.
    • 当每个访问装置要更新写在公共存储装置中的自己的数据时,每个访问装置的发送单元将先前写入存储装置的先前数据和新写入存储装置的新数据作为一对数据 通过公共汽车。 一旦从存取装置接收到一对数据,公共存储装置中的确定单元确定存储在存储器中的数据是否与从存取装置接收的先前数据一致。 如果这两个数据彼此一致,则将存储器中的数据重写为新的数据; 否则,内存中的数据更新被拒绝。