Providing a framework for developing, deploying and managing sophisticated mobile solutions, with a simple Web-like programming model that integrates with existing enterprise components. The first coupler in the first PLC is connected to the first coupler in the second PLC through a first Ethernet network and the second coupler in the first PLC is connected to the second coupler in the second PLC through a second Ethernet network, connecting them to at least one remote equipment. When there is a target packet, a response packet output reads out and transmits the target packet from the simulation result table.