Data translation device and system based on ethernet and serial communication technology

Abstract

The disclosed device includes following parts: arithmetic unit including microprocessor in use for processing data and controlling circuit in realtime; Ethernet communication unit for sending and receiving data to / from Ethernet under control of arithmetic unit; multi serial ports communication unit including chip of multi serial ports and logic control circuit in use for data interaction with I / Ocards under control of arithmetic unit; the logic control circuit for receiving control signals from the arithmetic unit and chip of multi serial ports, for switching I / O channels in chip, and for controlling serial ports to transmit / receive data; power circuit. Features are: raised efficiency for forwarding data, network scale, reliability and response speed.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a device for processing and forwarding data in two layers of different networks based on industrial Ethernet and serial communication in an industrial control system. Background technique [0002] In recent years, due to the gradual maturity of industrial Ethernet technology, the communication network of industrial control systems has gradually developed in the direction of industrial Ethernet. On the other hand, the I / O card in the industrial control system is usually based on serial communication, and the device that realizes the data interaction between the industrial Ethernet and the I / O card is called a data transfer card. The data forwarding card is an essential component in many control systems, and it plays a very important role in improving the response speed of the system. After adopting industrial Ethernet communication, a large amount of data needs to be forwarded to...

AI Technical Summary

Problems solved by technology

[0004] The defect of the prior art is that the data transfer card can only communicate with a small number of I / O cards at the same time (usually no more than 4 channels), but the I / O cards of a field I / O module group of the control system often reach 8-way, 16-way or more, these data forwarding cards can only use patrol inspection, and all I / O cards can be accessed through several repeated operations, thus increasing the communication time of communication card data interaction and reducing the system cost. The response speed of the control system; however, the control system often has high requirements for the response speed of the input and output. Therefore, the existing technology cannot meet the requirements of the control system for the response speed of the input and output.

Images