Application of serial port network server in data acquisition system

At present, data acquisition system for productive safety and protection system adopts one kind of more advanced networking technology, which enables former RS-232/RS-485 equipment immediately upgrade to the one having Ethernet interface through the serial port networking server. In this paper, combined with a practical project, a valuable scheme which adopts serial port device network server as connective bridge to connect PC and controllers is presented. In this scheme, the data collected by PC are transmitted by Ethernet, the monitor center and every control terminal receive the data by Ethernet transport protocols, which can increase the data transmission rate and safety, and also greatly increase the real-time monitor efficiency in the factory.