CN107992027A - A kind of DCS redundant communication modules switching method - Google Patents
A kind of DCS redundant communication modules switching method Download PDFInfo
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- CN107992027A CN107992027A CN201711326081.4A CN201711326081A CN107992027A CN 107992027 A CN107992027 A CN 107992027A CN 201711326081 A CN201711326081 A CN 201711326081A CN 107992027 A CN107992027 A CN 107992027A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0275—Fault isolation and identification, e.g. classify fault; estimate cause or root of failure
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
Abstract
The present invention relates to technical grade control system data communication field, particularly in ensuring that a module failure has no effect on the nuclear power control system of data communication.For the problem of switching of conventional module redundancy causes double main work in existing nuclear power control system, the present invention proposes a kind of redundant communication module switching method.I.e. module failure, correspondence with foreign country failure caused switching on the basis of, add the standby host monitor function that internally communicates.Wherein module failure, which mainly causes, cannot send heartbeat signal to redundant module, correspondence with foreign country failure refers to communication link chain rupture and communication overtime, standby host, which is monitored, to be referred to since intercommunicator is made as principal and subordinate's polling mechanism, therefore primary module can only have the request of a module response main website (mono- layer of controller of DCS), listening mode is in for module, monitoring primary module whether ask by response controller.
Description
Technical field
The present invention relates to technical grade control system data communication field, particularly ensuring that a module failure has no effect on number
According in the nuclear power control system of communication.
Background technology
With DCS control systems in nuclear power control using more and more extensive, high reliability is also more next as first requirement
More it is taken seriously.In order to achieve the purpose that high reliability and low crash rate are mutually unified, in the design and application of control system usually
Redundancy can be used.Rational Redundancy Design is by the reliabilty and availability for the system that greatly improves.
Redundancy DCS system includes network redundancy and module redundancy, wherein important set of the module redundancy as redundancy DCS system
Into part, include the redundancy of mono- layer of controller module of DCS, communication module and I/O module, it can ensure that scene any one
The failure of module does not influence the work of system, it is ensured that field device normal operation.
Traditional module redundancy designs can easily cause double masters to work at the same time there are active-standby switch, cannot between redundant module
The problems such as mutually passing data, it is impossible to solve the problems, such as these well, nuclear power reliability control system and availability cannot obtain root
This guarantee.
The content of the invention
It is an object of the invention to provide a kind of redundant communication module can reliable communication but also realize fast-speed redundancy switch
Method.
Realize the technical solution of the object of the invention：
A kind of DCS redundant communication modules switching method, applied to nuclear power control system, is inserted into two communication modules of cabinet
Realize module redundancy, after module failure, correspondence with foreign country failure occur for primary module or internally communication is not replied, standby module is switched to
Primary module, realization communicate with mono- layer of controller of DCS, improve the availability and reliability of system；
It is modules A and module B to define two communication modules respectively, has the interconnection line of hardware between two modules, modules A passes through mutual
Line sends square wave and gives other side's module B, corresponding module B also to send square wave to be known as heartbeat signal to modules A, the square-wave signal；
(1) module failure includes power failure, clock failure, causes module to send square-wave signal to other side's module
Failure；After module failure occurs for module, which can stop transmission square wave information and give other side's module；
(2) correspondence with foreign country failure：Modules A and module B external communication networks are used with hair with the mechanism received；Correspondence with foreign country event
Barrier state includes chain rupture and the communication overtime of respective communication link；Standby module sends out correspondence with foreign country state in each communication cycle
Primary module is sent to, primary module compares the communications status of two modules, this process is known as communication health value and compares；
(3) internally communication is not replied：Modules A and module B use interior communication network standby host monitoring mechanism, primary module with
During mono- layer of controller communication of DCS, standby module is in listening mode, monitors whether primary module replys controller request；If primary module
Continuous several times dont answer, then standby module will be switched to primary module, and corresponding primary module is switched to standby module, and in monitoring mould
Formula；
In the case where communication module is arranged to redundant mode, occur redundancy switching condition by module failure, correspondence with foreign country failure and
Standby host monitors host and does not reply composition, and switching matrix is formed by these three switching conditions.
Further, a kind of DCS redundant communication modules switching method as described above, heartbeat message have under abnormal conditions,
Switching matrix content is as follows：
(1) host heartbeat message is abnormal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；It is standby
Machine is in and does not reply controller solicited status；At this time, after host acknowledgement standby host enters not response status, host enters response shape
State；After standby host confirms that host enters not response status, standby host enters response status；
(2) host heartbeat message is abnormal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；It is standby
Machine is in response controller solicited status；At this time, standby host hold acknowledge controller solicited status；
(3) host heartbeat message is abnormal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host
In not replying controller solicited status；At this time, host hold acknowledge controller solicited status；
(4) host heartbeat message is abnormal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host
In response controller solicited status；At this time, host hold acknowledge controller solicited status；
(5) host heartbeat message is normal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；It is standby
Machine is in and does not reply controller solicited status；At this time, after host acknowledgement standby host enters not response status, host enters response shape
State；After standby host confirms that host enters not response status, standby host enters response status；
(6) host heartbeat message is normal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；It is standby
Machine is in response controller solicited status；At this time, active-standby switch, then by host response controller solicited status；
(7) host heartbeat message is normal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host
In not replying controller solicited status；At this time, host hold acknowledge controller solicited status.
Further, a kind of DCS redundant communication modules switching method as described above, heartbeat message under normal circumstances,
In communication cycle, health value information exchange is abnormal, and switching matrix content is as follows：
(1) host health degree information exchange is abnormal；Host is in and does not reply controller solicited status；Standby host health degree information
Exchange abnormal；Standby host is in not response status；At this time, standby host, which enters, does not reply controller solicited status, host acknowledgement standby host into
After entering not reply controller solicited status, host enters response status；
(2) host health degree information exchange is abnormal；Host is in and does not reply controller solicited status；Standby host health degree information
Exchange abnormal；Standby host is in response status；At this time, standby host, which enters, does not reply controller solicited status；Host acknowledgement standby host enters
After not replying controller solicited status, host enters response controller solicited status；
(3) host health degree information exchange is abnormal；Host is in response controller solicited status；Standby host health degree information is handed over
Transversion is normal；Standby host is in not response status；At this time, standby host, which enters, does not reply controller solicited status
For host acknowledgement standby host into after not replying controller solicited status, host enters response controller solicited status.
Further, a kind of DCS redundant communication modules switching method as described above, heartbeat message under normal circumstances,
In communication cycle, health value information exchange is normal, and switching matrix content is as follows：
(1) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；It is standby
Machine is in and does not reply controller solicited status；At this time, standby host, which enters, does not reply controller solicited status；Host acknowledgement standby host enters
After not replying controller solicited status, host enters response controller solicited status；
(2) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；It is standby
Machine is in response controller solicited status；At this time, active-standby switch, host enter response controller solicited status, and standby host is not replied
Controller solicited status；
(3) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree<Standby host health degree；It is standby
Machine is in and does not reply controller solicited status；At this time, standby host, which enters, does not reply controller solicited status, and host acknowledgement standby host enters
After not replying controller solicited status, host enters response controller solicited status；
(4) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree<Standby host health degree；It is standby
Machine is in response controller solicited status；At this time, active and standby not switch, host keeps not replying controller solicited status, and standby host is protected
Hold response controller solicited status；
(5) host is in response controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；Standby host
In not replying controller solicited status；At this time, active and standby not switch, host hold acknowledge controller solicited status, standby host is kept
Controller solicited status is not replied；
(6) host is in response status；Host passes through calculating：Host health degree<Standby host health degree；Standby host is in and does not reply
Controller solicited status；At this time, active-standby switch, host, which enters, does not reply controller solicited status, and standby host enters response controller
Solicited status.
Effect of the invention is that：
For the problem of switching of conventional module redundancy causes double main work in existing nuclear power control system, the present invention proposes one
Kind redundant communication module switching method.I.e. module failure, correspondence with foreign country failure caused switching on the basis of, add internal
The standby host monitor function of communication.Wherein module failure, which mainly causes, cannot send heartbeat signal to redundant module, correspondence with foreign country event
Barrier refers to communication link chain rupture and communication overtime, and standby host, which is monitored, to be referred to since intercommunicator is made as principal and subordinate's polling mechanism, main mould
Block can only have the request of a module response main website (mono- layer of controller of DCS), i.e., standby module is in listening mode, monitors primary module
Whether response controller is asked.
Embodiment
A kind of DCS redundant communication modules switching method of the present invention is further retouched with reference to specific embodiment
State.
The present invention is applied to nuclear power control system, and two communication modules for being inserted into cabinet realize module redundancy, in primary module
After generation module failure, correspondence with foreign country failure or internal communication are not replied, standby module is switched to primary module, realizes and mono- layer of DCS
Controller communicates, and improves the availability and reliability of system；
It is modules A and module B to define two communication modules respectively, has the interconnection line of hardware between two modules, modules A passes through mutual
Line sends square wave and gives other side's module B, corresponding module B also to send square wave to be known as heartbeat signal to modules A, the square-wave signal；
(1) module failure includes power failure, clock failure, causes module to send square-wave signal to other side's module
Failure；After module failure occurs for module, which can stop transmission square wave information and give other side's module；
(2) correspondence with foreign country failure：Modules A and module B external communication networks are used with hair with the mechanism received；Correspondence with foreign country event
Barrier state includes chain rupture and the communication overtime of respective communication link；Standby module sends out correspondence with foreign country state in each communication cycle
Primary module is sent to, primary module compares the communications status of two modules, this process is known as communication health value and compares；
(3) internally communication is not replied：Modules A and module B use interior communication network standby host monitoring mechanism, primary module with
During mono- layer of controller communication of DCS, standby module is in listening mode, monitors whether primary module replys controller request；If primary module
Continuous several times dont answer, then standby module will be switched to primary module, and corresponding primary module is switched to standby module, and in monitoring mould
Formula；
In the case where communication module is arranged to redundant mode, occur redundancy switching condition by module failure, correspondence with foreign country failure and
Standby host monitors host and does not reply composition, and switching matrix is formed by these three switching conditions.
Switching matrix content is as follows：
Heartbeat message has under abnormal conditions：
Under normal circumstances, in communication cycle, health value information exchange is abnormal for heartbeat message：
Under normal circumstances, in communication cycle, health value information exchange is normal for heartbeat message：
In the case of module failure, correspondence with foreign country failure or standby host monitoring host are unresponsive, switch between master and slave machines can be entered
Matrix.The function that wherein standby host is monitored can avoid caused by active-standby switch the situation of double main work, thus can availability and
The reliability of switching can be improved.
Claims (5)
- A kind of 1. DCS redundant communication modules switching method, applied to nuclear power control system, it is characterised in that：It is inserted into the two of cabinet A communication module realizes module redundancy, standby after module failure, correspondence with foreign country failure occur for primary module or internally communication is not replied Module is switched to primary module, and realization communicates with mono- layer of controller of DCS, improves the availability and reliability of system；It is modules A and module B to define two communication modules respectively, there is the interconnection line of hardware between two modules, and modules A passes through interconnection line Square wave is sent to give other side's module B, corresponding module B also to send square wave to be known as heartbeat signal to modules A, the square-wave signal；(1) module failure includes power failure, clock failure, causes module to send event of the square-wave signal to other side's module Barrier；After module failure occurs for module, which can stop transmission square wave information and give other side's module；(2) correspondence with foreign country failure：Modules A and module B external communication networks are used with hair with the mechanism received；Correspondence with foreign country failure shape State includes chain rupture and the communication overtime of respective communication link；Correspondence with foreign country state is sent to by standby module in each communication cycle Primary module, primary module compare the communications status of two modules, this process is known as communication health value and compares；(3) internally communication is not replied：Modules A and module B use interior communication network standby host monitoring mechanism, primary module and DCS mono- During layer controller communication, standby module is in listening mode, monitors whether primary module replys controller request；If primary module is continuously more Secondary dont answer, then standby module will be switched to primary module, and corresponding primary module is switched to standby module, and is in listening mode；In the case where communication module is arranged to redundant mode, redundancy switching condition occurs by module failure, correspondence with foreign country failure and standby host Monitor host and do not reply composition, switching matrix is formed by these three switching conditions.
- A kind of 2. DCS redundant communication modules switching method according to claim 1, it is characterised in that：Heartbeat message has different In the case of often, switching matrix content is as follows：(1) host heartbeat message is abnormal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；At standby host In not replying controller solicited status；At this time, after host acknowledgement standby host enters not response status, host enters response status；It is standby After machine confirms that host enters not response status, standby host enters response status；(2) host heartbeat message is abnormal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；At standby host In response controller solicited status；At this time, standby host hold acknowledge controller solicited status；(3) host heartbeat message is abnormal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host is in Controller solicited status is not replied；At this time, host hold acknowledge controller solicited status；(4) host heartbeat message is abnormal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host is in Response controller solicited status；At this time, host hold acknowledge controller solicited status；(5) host heartbeat message is normal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；At standby host In not replying controller solicited status；At this time, after host acknowledgement standby host enters not response status, host enters response status；It is standby After machine confirms that host enters not response status, standby host enters response status；(6) host heartbeat message is normal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；At standby host In response controller solicited status；At this time, active-standby switch, then by host response controller solicited status；(7) host heartbeat message is normal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host is in Controller solicited status is not replied；At this time, host hold acknowledge controller solicited status.
- A kind of 3. DCS redundant communication modules switching method according to claim 1, it is characterised in that：Heartbeat message is normal In the case of, in communication cycle, health value information exchange is abnormal, and switching matrix content is as follows：(1) host health degree information exchange is abnormal；Host is in and does not reply controller solicited status；Standby host health degree information exchange It is abnormal；Standby host is in not response status；At this time, standby host, which enters, does not reply controller solicited status, and host acknowledgement standby host enters not After response controller solicited status, host enters response status；(2) host health degree information exchange is abnormal；Host is in and does not reply controller solicited status；Standby host health degree information exchange It is abnormal；Standby host is in response status；At this time, standby host, which enters, does not reply controller solicited status；Host acknowledgement standby host, which enters, should not After answering controller solicited status, host enters response controller solicited status；(3) host health degree information exchange is abnormal；Host is in response controller solicited status；Standby host health degree information exchange is different Often；Standby host is in not response status；At this time, standby host, which enters, does not reply controller solicited statusFor host acknowledgement standby host into after not replying controller solicited status, host enters response controller solicited status.
- A kind of 4. DCS redundant communication modules switching method according to claim 1, it is characterised in that：Heartbeat message is normal In the case of, in communication cycle, health value information exchange is normal, and switching matrix content is as follows：(1) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；At standby host In not replying controller solicited status；At this time, standby host, which enters, does not reply controller solicited status；Host acknowledgement standby host, which enters, should not After answering controller solicited status, host enters response controller solicited status；(2) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；At standby host In response controller solicited status；At this time, active-standby switch, host enter response controller solicited status, and standby host does not reply control Device solicited status；(3) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree<Standby host health degree；At standby host In not replying controller solicited status；At this time, standby host, which enters, does not reply controller solicited status, and host acknowledgement standby host, which enters, should not After answering controller solicited status, host enters response controller solicited status；(4) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree<Standby host health degree；At standby host In response controller solicited status；At this time, active and standby not switch, host keeps not replying controller solicited status, and standby host is kept should Answer controller solicited status；(5) host is in response controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；Standby host is in Controller solicited status is not replied；At this time, active and standby not switch, host hold acknowledge controller solicited status, standby host keeps should not Answer controller solicited status；(6) host is in response status；Host passes through calculating：Host health degree<Standby host health degree；Standby host is in and does not reply control Device solicited status；At this time, active-standby switch, host, which enters, does not reply controller solicited status, and standby host is asked into response controller State.
- A kind of 5. DCS redundant communication modules switching method according to claim 1, it is characterised in that：Heartbeat message has different In the case of often, switching matrix content is as follows：(1) host heartbeat message is abnormal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；At standby host In not replying controller solicited status；At this time, after host acknowledgement standby host enters not response status, host enters response status；It is standby After machine confirms that host enters not response status, standby host enters response status；(2) host heartbeat message is abnormal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；At standby host In response controller solicited status；At this time, standby host hold acknowledge controller solicited status；(3) host heartbeat message is abnormal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host is in Controller solicited status is not replied；At this time, host hold acknowledge controller solicited status；(4) host heartbeat message is abnormal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host is in Response controller solicited status；At this time, host hold acknowledge controller solicited status；(5) host heartbeat message is normal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；At standby host In not replying controller solicited status；At this time, after host acknowledgement standby host enters not response status, host enters response status；It is standby After machine confirms that host enters not response status, standby host enters response status；(6) host heartbeat message is normal；Host is in and does not reply controller solicited status；Standby host heartbeat message is abnormal；At standby host In response controller solicited status；At this time, active-standby switch, then by host response controller solicited status；(7) host heartbeat message is normal；Host is in response controller solicited status；Standby host heartbeat message is abnormal；Standby host is in Controller solicited status is not replied；At this time, host hold acknowledge controller solicited status；Under normal circumstances, in communication cycle, health value information exchange is abnormal, and switching matrix content is as follows for heartbeat message：(1) host health degree information exchange is abnormal；Host is in and does not reply controller solicited status；Standby host health degree information exchange It is abnormal；Standby host is in not response status；At this time, standby host, which enters, does not reply controller solicited status, and host acknowledgement standby host enters not After response controller solicited status, host enters response status；(2) host health degree information exchange is abnormal；Host is in and does not reply controller solicited status；Standby host health degree information exchange It is abnormal；Standby host is in response status；At this time, standby host, which enters, does not reply controller solicited status；Host acknowledgement standby host, which enters, should not After answering controller solicited status, host enters response controller solicited status；(3) host health degree information exchange is abnormal；Host is in response controller solicited status；Standby host health degree information exchange is different Often；Standby host is in not response status；At this time, standby host, which enters, does not reply controller solicited statusFor host acknowledgement standby host into after not replying controller solicited status, host enters response controller solicited status；Under normal circumstances, in communication cycle, health value information exchange is normal, and switching matrix content is as follows for heartbeat message：(1) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；At standby host In not replying controller solicited status；At this time, standby host, which enters, does not reply controller solicited status；Host acknowledgement standby host, which enters, should not After answering controller solicited status, host enters response controller solicited status；(2) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；At standby host In response controller solicited status；At this time, active-standby switch, host enter response controller solicited status, and standby host does not reply control Device solicited status；(3) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree<Standby host health degree；At standby host In not replying controller solicited status；At this time, standby host, which enters, does not reply controller solicited status, and host acknowledgement standby host, which enters, should not After answering controller solicited status, host enters response controller solicited status；(4) host is in and does not reply controller solicited status；Host passes through calculating：Host health degree<Standby host health degree；At standby host In response controller solicited status；At this time, active and standby not switch, host keeps not replying controller solicited status, and standby host is kept should Answer controller solicited status；(5) host is in response controller solicited status；Host passes through calculating：Host health degree>Standby host health degree；Standby host is in Controller solicited status is not replied；At this time, active and standby not switch, host hold acknowledge controller solicited status, standby host keeps should not Answer controller solicited status；(6) host is in response status；Host passes through calculating：Host health degree<Standby host health degree；Standby host is in and does not reply control Device solicited status；At this time, active-standby switch, host, which enters, does not reply controller solicited status, and standby host is asked into response controller State.
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| CN109274553A (en) * | 2018-09-26 | 2019-01-25 | 北京广利核系统工程有限公司 | The self-diagnosing method and device of nuclear safe level DCS system communication |
| CN111007714A (en) * | 2019-12-06 | 2020-04-14 | 重庆川仪自动化股份有限公司 | Linux Ethernet-based redundant switching method for rail safety shielding door controller |
| CN112214441A (en) * | 2020-12-08 | 2021-01-12 | 北京和利时系统工程有限公司 | Communication switching method, equipment and system based on serial bus polling protocol |
| CN114428451A (en) * | 2021-12-06 | 2022-05-03 | 浙江中控技术股份有限公司 | Method for switching external communication permission of redundant communication module |
| CN115022159A (en) * | 2022-06-27 | 2022-09-06 | 汉中一零一航空电子设备有限公司 | Control equipment main controller redundancy backup system and method |
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