西門子 200plc 通過 modbus 協(xié)議與組態(tài)王通訊時，組態(tài)王中定義的寄存器地址與plc 地址是如何對應(yīng)的？
映射關(guān)系如下：0－Q，1－I，3、4、8、9－V；
3,4,8,9 的 dd 號與 PLC 中 V 寄存器的偏移地址（實際地址-1000）的對應(yīng)關(guān)系：組態(tài)王中（寄存器的 dd 號-1）*2=PLC 中的 V 寄存器的偏移地址。組態(tài)王中 40031對應(yīng) PLC：VW1060 (組態(tài)王中寄存器 4 表示 SHORT 型變量)組態(tài)王中 90640 對應(yīng) PLC：VD2278 (組態(tài)王中寄存器 9 表示 FLOAT 型變量)。
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