S7-200 SMART 通信端口以及連接方式
http://www.ad.siemens.com.cn/productportal/prods/s7-200-smart-portal/200smarttop/communication/Port/Connect.htm
http://www.ad.siemens.com.cn/productportal/prods/s7-200-smart-portal/200smarttop/smartsms/038.html
通信[S7-1500]
http://www.ad.siemens.com.cn/productportal/prods/1500published/1500list/com_list0.html
通信__SIMATIC S7-1200
http://www.ad.siemens.com.cn/productportal/prods/s7-1200_plc_easy_plus/smartsms/019.html
就兩根線(xiàn),3和8,不對就換換。西門(mén)子對外是3+ 8-。3B 8A
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