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    • 5. 发明专利
    • Sending device, receiving device, and communication system
    • 发送设备,接收设备和通信系统
    • JP2007043679A
    • 2007-02-15
    • JP2006178896
    • 2006-06-29
    • Hitachi Information & Control Solutions LtdHitachi Ltd株式会社日立情報制御ソリューションズ株式会社日立製作所
    • ISHIKAWA MASAKAZUONOZUKA AKIHIROOGURA MAKOTOSHIRAISHI MASAHIROUMEHARA TAKASHIMASUKO NAOYANAGAYAMA HISAOENDO HIROMICHIFUNAKI SATORUKOBAYASHI MASAMITSUBANDO AKIRAKOBAYASHI EIJIFURUTA YASUYUKI
    • H04L29/10H04L1/00
    • PROBLEM TO BE SOLVED: To attain both a high performance and safety in data communication between a controller and a process I/O unit.
      SOLUTION: The device is provided with a circuit which generates and adds a CRC (Cyclic Redundancy Check) to a transmitted data of the controller and the process I/O unit, a circuit which checks the CRC of a received data, and a status register which selects operation modes of operation or stop of a CRC generation and a check function and shows CRC errors in each device, and inconsistency of the operation mode of a transmitter and a recipient of the data. It also performs a check of the CRC in a relay communication device. When two or more relay communication devices exist, the CRC for transmission between relay communication devices is additionally added, the CRC check result in each device of the controller, the relay communication device, and the process I/O unit is reflected in the status register, the soundness of the data between terminals is checked, the data having errors generated in a transceiver process is prevented from being used, and the device is prevented from a malfunction.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:为了在控制器和处理I / O单元之间实现数据通信的高性能和安全性。 解决方案:该设备具有电路,该电路为控制器和处理I / O单元的发送数据生成CRC(循环冗余校验),检查接收到的数据的CRC的电路,以及 选择操作模式或停止CRC生成和检查功能的状态寄存器,并且在每个设备中显示CRC错误,以及发送器的操作模式与数据的接收者的不一致。 它还执行中继通信设备中的CRC校验。 当存在两个以上的中继通信装置时,还附加用于中继通信装置之间传输的CRC,控制器,中继通信装置和处理I / O单元的每个装置的CRC校验结果反映在状态寄存器 检查终端之间的数据的正确性,防止在收发器处理中产生的错误的数据被使用,并且防止装置发生故障。 版权所有(C)2007,JPO&INPIT