Redundant intelligent network communication controller

Abstract

The present invention discloses a redundant intelligent network communication controller. The hardware adopts a high-function 32-bit CPU belonging to the ARM9 series, the software adopts LINUX embedded operation system. The present invention mainly realizes DCS or the computer main station implements high-speed network data exchange through the Ethernet and the intelligent measurement and control device of on-site bus interface. The control function is thoroughly diverted to the site, based on the control function of the on-site intelligent device, the high-speed network data exchange and control with a large data volume and high-reliability of the DCS main station which realizes the process automation control and the on-site intelligent device which is equipped with the on-site bus interface are realized.

Description

technical field [0001] The invention relates to a network communication controller in a field bus control system FCS, which is widely used in the field of automatic process control in electric power, petroleum, chemical industry, metallurgy, pharmaceutical, papermaking and other related industries. Background technique [0002] With the development of smart instruments, network technology and data communication technology, fieldbus control technology has become the mainstream of today's automation control technology. It replaces the existing distributed control system DCS and becomes a key technical means in the field of automation control. The main technical problems of the bus control system are: 1. They all use stand-alone devices. When the device itself or the field bus fails, it will affect the normal operation of the entire system, which cannot meet the requirements of high reliability and redundancy applications; 2. Most of them use gateways, that is, protocol convers...

AI Technical Summary

Problems solved by technology

[0002] With the development of smart instruments, network technology and data communication technology, fieldbus control technology has become the mainstream of today's automation control technology. It replaces the existing distributed control system DCS and becomes a key technical means in the field of automation control. The main technical problems of the bus control system are: 1. They all use stand-alone devices. When the device itself or the field bus fails, it will affect the normal operation of the entire system, which cannot meet the requirements of high reliability and redundancy applications; 2. Most of them use gateways, that is, protocol conversion devices. Since the network speed of the station control layer is generally not lower than 10M, and the field bus speed of the field interval layer is generally lower than 1M, when there are many field bus sub-station devices, that is, network nodes, due to It is always waiting for the data update of the substation equipment, which will greatly reduce the real-time performance of the whole system, and cannot meet the application occasions with large data volume and high real-time performance; 3. Most of the existing products of this type use low-speed downlink field interfaces, interface bus The rate is not higher than 38.4K, which cannot meet the application and standards of H2 high-speed field bus, which is the mainstream of today's international industry: ①DeviceNet bus, the requirements of GB / T18858.3-2002, ②Profibus-DP bus, TYPE in IEC 6 1 158:2003 III requirements, ③Modbus / TCP Industrial Ethernet, GB / Z19582.1-2004 Part 1 requirements; 4. At present, most of the products in this technical field are completed by industrial computers and WINDOWS operating systems, but due to the fan, hard disk Many peripheral plug-in devices, hardware and software have unstable factors

To sum up, the key technical problem faced by the existing technology is to ensure its reliability, real-time performance and the standardization of the field bus. At present, the above technical problems have not been effectively solved, which restricts the wide application of the field bus control system FCS.

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