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此模块实现了一个总线设备管理器。所有被管理的设备使用 Mewtocol 协议通信,作为从机。通常总线类型是 RS485。对内核科技RS485接口的输入输出模块、单轴运动控制模块提供高层次API支持。

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Python Module: a2y_mew

a2y_mew模块实现了扩展的Mewtocol通信协议。原始的Mewtocol来自Panasonic,用于其FP系列PLC与上位机、触摸屏等设备通信。 本模块在以下方面对Mewtocol进行了扩展:

  • 地址空间从8位整数扩展为不定长,最高可达32位。为了兼容性,最小为8位,在报文中至少占两个字节。
  • 通讯方式从半双工增强为全双工,即主从双方可以同时发送数据。当从设备发生了某个事件(例如,输入点发生了变化),可以主动给主机发送报文。

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