PLC側需要設置勾選允許來自遠程對象的Put/Get通信訪問對於西門子1200/1500係列，要勾選允許Put/Get訪問，對於200Smart/300/400，則不需要。
對於基於博圖開發S7-1200/1500的項目，如果要與DB塊數據通信，需要要去除DB的優化的塊訪問，對於200Smart/300/400，則不需要。如果希望通過標簽通信，可以採用OPCUA。
因為PLC大多數是基於存儲區的，每個地址肯定是隸屬於某個存儲區，大家都知道西門子PLC自帶的存儲區有I區、Q區、M區、T區、C區，但是對於常用的DB存儲區是沒有的，需要自己去創建，也就意味著，如果你要讀取DB地址，要提前創建好DB存儲區，除此以外，DB存儲區創建之後，默認是沒有字節的，需要自己一個個添加變量，才能形成有效存儲區，因此一個DB存儲區的範圍是有限並且可見的（可以通過偏移量看出來）。
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