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Ethernet-based redundancy control system and control method

A redundant control and control system technology, applied in general control systems, control/regulation systems, program control, etc., to achieve high reliability

Active Publication Date: 2015-09-09
XIAN CHENYU ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, provide a redundant control system and control method based on Ethernet, solve a series of problems caused by a single system failure, and have high security and reliability of the automation system

Method used

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  • Ethernet-based redundancy control system and control method

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, an Ethernet-based redundant control system includes a host system, a control system and an execution system;

[0030] The host system includes two industrial computers 1, each of which is equipped with configuration software, and the two industrial computers 1 form a local area network through a standard network card, and realize timely data update and exchange between the two industrial computers 1 through the local area network; If the industrial computer 1 fails, it will not affect the other one to continue to work;

[0031] The control system includes two sets of PLC systems 2 both equipped with software. The PLC system 2 includes power supply modules, redundant CPUs and Ethernet communication modules for redundant CPU communication. The redundant CPUs in the two sets of PLC systems 2 use Optical fiber connection to ach...

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Abstract

The invention discloses an Ethernet-based redundancy control system and a control method. The redundancy control system comprises an upper system, a control system and an execution system. The upper system comprises two industrial personal computers. A configuration software is installed on each of the industrial personal computers. The industrial personal computers form a local area network via a standard network card. The control system comprises two sets of PLC systems. Each of the PLC systems comprises a power supplying module, a redundancy CPU and an Ethernet communication module used for redundancy CPU communication. The redundancy CPUs in the PLC systems are connected via an optical fiber. The industrial personal computers are connected with the PLC systems via a switch and communicate with the Ethernet communication module via switches. The execution system comprises multiple I / O modules and multiple execution units. The PLC systems are separately connected with the I / O modules via Profibus-DP buses. The I / O modules are connected with the execution units. According to the invention, via the on-line real-time monitoring is performed via the industrial personal computers, and the PLC systems work concurrently, so safety, reliability and stability of operation of the system are greatly improved.

Description

Technical field: [0001] The invention belongs to the technical field of industrial automation control and field control, and in particular relates to an Ethernet-based redundant control system and a control method. Background technique: [0002] Some process control systems, such as some systems in chemical, petroleum, papermaking, metallurgy, nuclear power plants and other industrial sectors, require high reliability of control devices, especially some complex large-scale production systems, such as automobile assembly lines, as long as If there is a problem in one place in the system, it will cause the entire system to stop production. It is impossible to meet the reliability requirements of the above-mentioned industrial sectors only by improving the reliability of the control system hardware and software, because the programmable logic controller (Programmable Logic Controller) , referred to as PLC) There is a certain limit to the improvement of its own reliability, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02G05B19/418G05B19/4184G05B19/4185G05B2219/31245
Inventor 师保俊乔峰孔德炳闫思敏白栓栓暴磊阮泽宇刘澍蘅
Owner XIAN CHENYU ENVIRONMENT ENG
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