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Triple redundancy control system in process control and method thereof

A triple redundancy, control system technology, applied in the direction of electrical program control, comprehensive factory control, comprehensive factory control, etc., can solve the problems of poor reliability and difficulty in ensuring synchronization, achieve high security, ensure synchronization, input and output reliable effect

Inactive Publication Date: 2012-08-01
SHANGHAI XINHUA CONTROL TECH GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a triple redundancy control system and its method in process control in order to overcome the defects of poor reliability and difficult synchronization of the triple redundancy method in the prior art

Method used

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  • Triple redundancy control system in process control and method thereof
  • Triple redundancy control system in process control and method thereof
  • Triple redundancy control system in process control and method thereof

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Embodiment 1

[0045] Taking the input as a switching value as an example, the processing flow of signal input, input voting, synchronization processing, output voting, and signal output in the present invention will be described in detail below.

[0046] Such as figure 2 As shown, the following steps are generally included: signal input, input voting, calculation processing, synchronization processing, output voting, and signal output.

[0047] 1. Signal input. After the switch signal is connected, it is input into processor A, processor B, and processor C in three ways. After receiving the input, each processor performs information interaction through the TriBus bus, so that each processor can Got 3 input values.

[0048] 2. Input voting, each processor performs input voting on the obtained three inputs. The switching value is voted by choosing two out of three, that is, if two of the three inputs are both 1 or 0, then the value is the valid input value. Voting is detailed here as foll...

Embodiment 2

[0069] Taking the input as an analog quantity as an example, the processing flow of signal input, input voting, synchronous processing, output voting, and signal output in the present invention will be described in detail below.

[0070] Such as figure 2 As shown, the following steps are generally included: signal input, input voting, calculation processing, synchronization processing, output voting, and signal output.

[0071] 1. Signal input. After the analog signal is connected, it is input into processor A, processor B, and processor C in three ways. After receiving the input, each processor performs information interaction through the TriBus bus, so that each processor can Got 3 input values.

[0072] 2. Input voting, each processor performs input voting on the obtained three inputs. The analog quantity is voted through one of three options + high selection / low selection, or average value, that is, among the three inputs, the maximum or minimum value is selected as the...

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Abstract

The invention discloses a triple redundancy control system in process control and a method thereof. The system comprises three independent processors. The processors are connected with each other through a bus. The control system also comprises one output vote terminal which is connected with the three processors and is used to vote three processor output taken as voting input. Each processor comprises: one input voting module, which is used for the each processor to carry out input voting on the obtained three path input respectively; one calculation processing module, which is used for the each processor to carry out calculation according to a preset control logic respectively after the input voting, and adding 1 to respective cycle count after the calculation; one synchronous processing module, which is used for carrying out comparison taking a master processor as a reference, and sending the synchronization information to a slave processor after the main processor completes calculation. In the invention, by using a synchronization mechanism, a voting mechanism and a master-slave switching mechanism, high reliability and high security of the system can be guaranteed.

Description

technical field [0001] The invention relates to the application of triple redundancy control in high-reliability and high-safety occasions in industrial process control, such as nuclear power, chemical industry and other fields. Background technique [0002] The focus of triple redundancy technology is the reliability and security of the system. There are many ways of existing triple redundancy technology: one is to configure three CPUs on the same card for redundant calculation, this way will inevitably lead to the inability of the three CPUs to perform calculations when the card fails, resulting in system failure , The reliability of the system is poor; one is to use three PLCs as triple redundant CPUs. This method relies on commercial PLCs, and it is difficult to effectively guarantee the synchronization between the three PLCs. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a triple redundancy control system...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 周林荣刘伟邹泽明李培植
Owner SHANGHAI XINHUA CONTROL TECH GROUP
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