Kepware software is a commonly used OPC server software. Many Scada software such as WinCC and Kingview can be used as OPC client to establish communication with kepware OPC server, so as to realize data acquisition and control of field equipment。

     Field serial port devices such as PLC and transmitter are connected to DTU through serial port. DTU options include 4g DTU and Ethernet DTU, as shown in the figure below:

      Kepware software supports Modbus RTU and other serial communication protocols. It can be selected correctly (field equipment support) to realize data communication.

      The computer side is required to be able to access the Internet, install comway virtual serial software, establish virtual serial port, and cooperate with kepware software to realize wireless data communication.

    Field devices such as PLC and Human Machine Interface can be connected to DTU through Ethernet port.DTU options include 4g DTU and Ethernet DTU, as shown in the figure below:

     Kepware software supports Modbus TCP and other network port communication protocols, which can be correctly selected (field device support) to realize data communication。

     The computer is required to be able to access the Internet, install DC-vpn software, access the VPN network as a VPN client, and cooperate with kepware software to realize wireless data communication based on VPN network.

     The devices in Wan realize "LAN communication" based on Internet by joining VPN network