As a bridge connecting the industrial Internet of Things central control system and remote devices, the serial port server plays a self-evident role in the entire communication link. Today, the author will use industrial control solutions as a foothold to analyze the mystery of this “magnificent bridge”.
So what is the role of the serial port server?
The serial port server is a serial port device networking server. Its main function is to convert the RS232/485/422 serial port into a TCP/IP network interface to realize bidirectional transparent transmission of data between the serial port and Ethernet, greatly extending the transmission distance of the serial port device.
The main functions of the serial port server
What the serial port server completes is communication data storage control between a connection-oriented RS232 link and a connectionless-oriented Ethernet. The system processes various serial port data stream data from serial port devices and performs format conversion to make them into data frames that can be transmitted in the Ethernet. Then it judges the data frames from the Ethernet and converts them into serial Data is sent to the responding serial device. Its main function is to perform TCP/IP protocol processing on string data information and turn it into P data packets that can be transmitted on the Internet. At the same time, the serial port equipment of various enterprises and institutions can be connected to the Ethernet LAN to realize resource sharing, so it has been widely used in communications, transportation, schools, finance, taxation, insurance and other industries.
In the 21st century, with the rapid advancement of industrial informatization, serial port servers have been widely used in industrial control fields such as industrial automation, intelligent building monitoring, power systems, and unattended parking lots.
At this stage, the informatization of various enterprises is becoming increasingly developed and perfected. During process control, data collection, processing and control of field equipment are required to achieve a sufficient data source for the entire informatization. The serial port server can connect multiple serial port communication devices and select and process the serial port data stream, making the transmission of serial port data streams based on TCP/IP possible. By converting the existing RS 232 interface data into IP port data, and then performing IP management and data access, traditional serial data can be transmitted on the IP channel, especially the original The device communication interface has been modified to save investment while simplifying the complexity of network cabling.
Keywords: serial port server
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