Ethernet Device Servers play a crucial role in the Industrial Internet of Things, enabling seamless connectivity between serial devices and networks. The following are three main working methods of Ethernet Device Servers, which are suitable for people who need networking applications:

1. TCP/UDP communication mode
   Description of working mode:
   In this mode, Ethernet Device Servers are used in pairs, with one serving as the server and the other as the client.
   · Both parties establish a connection through IP addresses and port numbers to achieve bidirectional transparent transmission of data.
   This mode is particularly suitable for converting the bus connection between two serial devices into a TCP/IP network connection, thereby enabling remote communication and control.
   Application scenario:
   When it is necessary to connect serial devices scattered in different locations to achieve remote monitoring and management, TCP/UDP communication is particularly effective.

2. Virtual serial communication mode
   Description of working mode:
   In this mode, one or more Ethernet Device Servers establish connections with computers and are managed through virtual serial port software on the computers.
   The virtual serial port software can simulate multiple virtual serial ports, each of which can correspond to one or more Ethernet Device Servers.
   · Data is transmitted transparently in both directions between virtual serial ports and Ethernet Device Servers, enabling remote access and control of serial devices.
   Application Scenario:
   This mode is suitable for serial devices connected through a 485 bus or 232 devices controlled by a computer, enabling remote management and maintenance of these devices over a network.

3. Based on network communication mode
   Description of working mode:
   In this mode, the application program on the computer has already written a communication program based on the Socket protocol.
   Ethernet Device Servers have integrated network communication protocols such as TCP/IP and UDP, allowing them to directly communicate with applications on computers.
   Users only need to select the Socket protocol support in the Ethernet Device Servers settings to achieve bidirectional data transmission.
   Application Scenario:
   This mode is suitable for highly integrated and customized networking applications, such as industrial automation, remote monitoring, and other fields. Through Socket programming, users can implement complex data processing and control logic.
   summary
   These three working modes of Ethernet Device Servers have their own characteristics and are suitable for different application scenarios. TCP/UDP communication mode is suitable for remote communication and control; The virtual serial communication mode is suitable for managing serial devices through computers; The network communication mode provides higher flexibility and customization capabilities. When choosing which working method to use, it is necessary to consider comprehensively based on specific application requirements and scenarios.