根据协议来，了解一下基本串口知识
The local_monitoring of AAA adopt siemens PLC s7-200 as program controller,and force control configrating soft for data_monitoring;it makes use of real-time data,histrocal data,Trend curve and on for obeservating AAA's state.But for monitoring both north's and south's AAA,we connect two force control configrating soft with Ethernet,So,two control centers
are sharing data!
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