Serial transmission system for controlling a network of I/O devices
    1.
    发明授权
    Serial transmission system for controlling a network of I/O devices 失效
    用于控制I / O设备网络的串行传输系统

    公开(公告)号:US5721737A

    公开(公告)日:1998-02-24

    申请号:US437320

    申请日:1995-05-09

    IPC分类号: G06F13/42 H04L12/403 H04J3/02

    CPC分类号: G06F13/4286 H04L12/403

    摘要: A serial transmission system for controlling a network of input/output devices is provided. The serial transmission system includes: a three wire serial link; a master unit for controlling communication over the serial link; multiple input remote units for receiving information from the input devices; and multiple output remote units for controlling the output devices. The master unit includes a programmable optically isolated microcontroller adapted to initiate a synchronous data link control (SDLC) communications protocol with the remote units. In addition the master unit includes memory tables for storing input/output, error, diagnostic, status and node availability information. This information can be shared with a PC or host controller. In addition, the PC or host controller can include programs for directing the master unit and remote units to initialize, reset, scan, or maintain an idle condition.

    摘要翻译: 提供了一种用于控制输入/输出设备的网络的串行传输系统。 串行传输系统包括:三线串行链路; 用于控制串行链路上的通信的主单元; 多个输入远程单元,用于从输入设备接收信息; 以及用于控制输出设备的多个输出远程单元。 主单元包括可编程光隔离微控制器,其适于与远程单元发起同步数据链路控制(SDLC)通信协议。 此外,主单元还包括用于存储输入/输出,错误,诊断,状态和节点可用性信息的存储表。 该信息可以与PC或主机控制器共享。 此外,PC或主机控制器可以包括用于指导主单元和远程单元来初始化,重置,扫描或维持空闲状态的程序。