Synchronous data controller based hot standby system of main control unit and method thereof

Abstract

The invention discloses a synchronous data controller based hot standby system of a main control unit and a method thereof. The hot standby system comprises two main control boards with the same structure, a mother board and more than one service board; the data and address bus and the control signals of the main control boards are connected with the data and address bus and the control pins of the service boards through the mother board, the main control boards and the service boards are all fixed to the mother board through connectors, and the main control boards are mainly responsible for communicating with the service boards and controlling the whole system. A hardware circuit is combined with software to realize reliable hot standby for the main control unit and improve synchronous efficiency and reliability between the main control boards respectively for main application and standby application, a data / state update process after the system operates is completed by the hardware, and the powered and initialized system has no need to send data messages to complete data / state update. The invention is capable of increasing the utilization rate of system resources, decreasing the complexity of the system software, and improving the synchronous performance of main / standby state without influence on normal communication services.

Description

technical field [0001] The invention relates to a communication device in the field of industrial control, in particular to a hot backup system of a main control unit based on a data synchronization controller. Background technique [0002] In the field of communication, the reliability requirements of the communication system are very high, and no matter what the circumstances, the business must be unimpeded. As the core of the entire system, the main control unit will inevitably lead to abnormal operation of the entire system and interruption of business once it fails. [0003] The emergence of the hot backup technology of the main control unit can solve the above problems very well. The "1+1" backup mode is adopted. When the main control board of the main control unit fails, the system will automatically replace the original main control board with the cut off, the original standby main control board will automatically switch to the active main control board, ensuring th...

AI Technical Summary

Problems solved by technology

When the business volume of the communication system is large, it is very likely that the normal business will be interrupted due to the transmission of too many "messages", which will reduce the reliability of the system.

In addition, if a new business type is added to the system, the types of messages between the active main control board and the standby main control board will also increase, thus increasing the complexity of the system software

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