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On-off output channel redundancy fault-tolerant control method and redundancy on-off output channels

A technology of switching value output and control method, which is applied in the field of redundant fault-tolerant control of switching value output channels and redundant switching value output channels, can solve problems such as the inability to guarantee the stability of the operation process, and achieve the goal of ensuring stability and improving fault tolerance Effect

Active Publication Date: 2013-09-11
HANGZHOU HOLLYSYS AUTOMATION +1
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Problems solved by technology

[0005] In view of this, the present invention provides a redundant fault-tolerant control method for switching value output channels and a redundant switching value output channel to overcome the problem in the prior art that when two channels fail, the system will lead to safety and cannot guarantee operation. Process Stability Issues

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] The invention discloses a redundant fault-tolerant control method for a switch output channel, which is applied to three redundant switch output channels of a DEH control system module. The method includes: an input end of the switch output channel receives a control signal sent by an FPGA; The control signal is processed to obtain an output signal, and each of the output signals is directly connected in parallel through diodes ...

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Abstract

The invention discloses an on-off output channel redundancy fault-tolerant control method which is applied to three redundancy on-off output channels of a digital electro-hydraulic control system (DEH) module. The method comprises the steps of enabling input ends of the on-off output channels to receive control signals sent by a field programmable gate array (FPGA), processing the control signals to obtain output signals, and enabling the output signals to be in parallel connection with redundancies respectively through diodes; enabling the on-off output channels to judge whether faults occur inside or outside the on-off output channels in a self-checking read-back mode; presetting a degradation mode, and outputting output quantity according to the degradation mode when the faults occur. According to the method, through three independent redundancy on-off output channels, the degradation mode is set, the faults inside or outside the channels are effectively judged through the self-checking read-back mechanism, and stability in the running process is guaranteed. The invention further discloses the redundancy on-off output channels, and fault-tolerant capability of a whole system is greatly improved.

Description

technical field [0001] The invention relates to the technical field of redundant fault-tolerant control, and more particularly, to a redundant fault-tolerant control method of a switch output channel and a redundant switch output channel. Background technique [0002] At present, DCS (Distributed Control System, distributed control system) is a distributed control system, which has been widely used in automation control fields such as petroleum, electric power, chemical industry, steel, cement, manufacturing, water treatment, etc. It is a process control level and process control system. The multi-level computer system connected by the communication network composed of the monitoring level integrates 4C technologies such as computer, communication, display and control, and its basic idea is decentralized control, centralized operation, hierarchical management, flexible configuration and convenient configuration. [0003] With the development of computer technology and its ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B9/03
Inventor 孙咸平康明强韩宝林邢晖肖素伟
Owner HANGZHOU HOLLYSYS AUTOMATION
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