公司名称：武汉鑫金立商贸有限公司

人机界面(HMl)：方便的人机界面服务已经集成在S7—300操作系统内、因此人机对话的编程要求大大减少。
  SIMATIC人机界面(HMl)从S7—300中取得数据，S7-300按用户指定的刷新速度传送这些数据。S7-300操作系统自动地处理数据的传送。
  诊断功能：CPU的智能化的诊断系统连续监控系统的功能是否正常、记录错误和特殊系统事件(例如：超时、模块更换等)。
  口令保护：多级口令保护可以使用户高度、有效地保护其技术机密，防止未经允许的复制和修改，操作方式选择开关：操作方式选择开关像钥匙一样可以拔出，当钥匙拔出时，就不能改变操作方式。这样就防止非法删除或改写用户程序。
通讯

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