Three-plus-one redundancy control communication bus method for triplex redundancy control system

A technology of control system and communication bus, applied in the field of automatic control instruments, can solve the problems of reduced safety level, out-of-cabinet design, improvement of residual data, etc.

CN103543715AInactive Publication Date: 2014-01-29SHANGHAI POWER EQUIP RES INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-01-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a three-plus-one redundancy control communication bus method for a triplex redundancy control system. The three-plus-one redundancy control communication bus method is characterized by including step 1, outwards extending a four-way communication interface of each of a control processor, an analog input card, an analog output card, an on-off input card and an on-off output card, and step 2, connecting the four-way communication interfaces of the control processor, the analog input card, the analog output card, the on-off input card and the on-off output card which belong to a same triplex redundancy controller group with a four-way control communication bus in a matrix mode. One control communication bus of the four-way control communication bus is a standby bus. The three-plus-one redundancy control communication bus method has the advantages that safety level of the whole control system is not reduced when a fault point exists in the control communication bus, and at most three fault points are allowed by the control communication bus of the whole system to avoid system breakdown.
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Description

technical field

[0001] The invention relates to a three-plus-one redundant control communication bus method for a three-redundancy control system. The design of a high-reliability data communication bus for a triple-redundancy control system with high safety requirements belongs to the technical field of automatic control instruments. Background technique

[0002] So far, with the continuous development and improvement of 5C technologies - COMPUTER (computer technology), CONTROL (automatic control technology), COMMUNICATION (communication technology), CRT (display technology) and CHANGE (conversion technology), the traditional distributed control system (hereinafter referred to as DCS) or programmable control systems (hereinafter referred to as PLC) are becoming more and more mature, but most of their technologies are based on dual redundancy technology that does not require ultra-high safety, and the control communication bus also adopts dual redundancy remaining technology...

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Embodiment Construction

[0013] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0014] The present invention is one of the technologies based on the triple-redundancy control system. Each group of controllers of the triple-redundancy control system can be connected with 96 cards of various types, and the entire system can have 64 group controllers. The following is Such as figure 2 The DEMO demonstration system (prototype) of a triple-redundancy control system is shown as an example. The prototype has two sets of operator / engineer stations, one switch, two sets of triple-redundant controllers, and each set of triple-redundant controllers It includes three control processors, and each control processor is hung with three layers of machine slots. Each machine slot has two digital input cards, two digital output cards, two analog input cards and two analog output cards. Each control processor has four communic...