Communications network for programmable controllers
    1.
    发明授权
    Communications network for programmable controllers 失效
    可编程控制器的通信网络

    公开(公告)号:US4477882A

    公开(公告)日:1984-10-16

    申请号:US352014

    申请日:1982-02-24

    CPC classification number: G05B19/052

    Abstract: Programmable controllers are connected in a ring by serial data links. Each controller periodically transmits information packets on the ring which contain its I/O image table data. All controllers on the ring receive such data and store it in their data tables, and such data is thus available for examination by each controller processor during its execution of the user's control program.

    Abstract translation: 可编程控制器通过串行数据链路以环形方式连接。 每个控制器周期性地在环上发送包含其I / O映像表数据的信息包。 环上的所有控制器接收这样的数据并将其存储在其数据表中,并且这样的数据因此可用于每个控制器处理器在其执行用户的控制程序期间进行检查。

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