PN是代表PLC集成了PROFINET口，也可以说是以太网口。DP是代表PLC集成了PROFIBUS-DP口。3PN/DP是：X1:MPI/DPX2:DPX3:PN-IO两个端口2PN/DP是：X1:MPI/DPX2:PN-IO两个端口（PROFINETIO-Controller;supportsRT/IRT;PROF...