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    Programmable logic controller computer system with micro field processor and programmable bus interface unit
    23.
    发明授权
    Programmable logic controller computer system with micro field processor and programmable bus interface unit 失效
    具有微处理器和可编程总线接口单元的可编程逻辑控制器计算机系统

    公开(公告)号：US5978593A

    公开(公告)日：1999-11-02

    申请号：US711370

    申请日：1996-09-05

    申请人： Daniel White Sexton

    发明人： Daniel White Sexton

    IPC分类号： G05B19/05 ,  G06F13/00

    CPC分类号： G05B19/052 ,  G05B19/054

    摘要： A programmable logic controller computer system is provided which achieves great flexibility in communication among the components of the system. The computer system includes a host programmable logic controller coupled by a field bus to a programmable bus interface unit. The programmable bus interface unit is located at a field station which includes a main bus to which a micro field processor and a plurality of I/O modules are coupled. The micro field processor is capable of locally processing I/O data from the I/O modules without involving the host PLC. A hand-held programmer is coupled to the programmable bus interface unit to permit the user to program an I/O map into the bus interface unit. The I/O map specifies mapping among the I/O modules, the micro field processor and the host programmable logic controllers. In this manner, communication among the I/O modules, the micro field processor and the host programmable logic controller is flexibly specified and controlled. Moreover, field bus traffic from the I/O modules back to the host programmable logic controller is significantly reduced.

    摘要翻译： 提供了一种可编程逻辑控制器计算机系统，其在系统的组件之间的通信中实现极大的灵活性。 计算机系统包括通过现场总线耦合到可编程总线接口单元的主机可编程逻辑控制器。 可编程总线接口单元位于现场站，其包括主站总线，微总线处理器和多个I / O模块耦合到该主总线。 微处理器能够在不涉及主机PLC的情况下本地处理来自I / O模块的I / O数据。 手持编程器耦合到可编程总线接口单元，以允许用户将I / O映射编程到总线接口单元中。 I / O映射指定了I / O模块，微处理器和主机可编程逻辑控制器之​​间的映射。 以这种方式，灵活地指定和控制I / O模块，微处理器和主机可编程逻辑控制器之​​间的通信。 此外，从I / O模块返回主机可编程逻辑控制器的现场总线流量显着减少。