High-speed dual-computer hot standby redundancy communication method

Abstract

The invention provides a high-speed dual-computer hot standby redundant communication method. The method specifically comprises the following steps: setting two serial ports and a group of level pins to form three groups of redundant communication links; configuring models, serial port parameters, data formats, verification modes, serial port disconnection judgment and serial port reset of two paths of serial port communication, and heartbeat pulse parameters, level connection signal states, heartbeat pulse disconnection judgment and heartbeat pulse filtering of level communication; and judging that the current state of the local machine is a host operation state or a slave operation state or a power-on initialization state, and switching the operation state of the local machine according to the communication condition, the fault state and the UID condition of the two machines. Only the cheapest serial port and some level pins are needed, the method is suitable for the field of batch industrial control, and the cost is low; the stability of software and hardware is high; three processing branches exist for three groups of link channels, so that the failure caused by a single software fault is avoided to the greatest extent; and the switching speed is high.

Description

technical field [0001] The invention relates to redundant communication technology, in particular to a high-speed dual-computer hot standby redundant communication method. Background technique [0002] Such as figure 1 As shown, the current implementation methods of dual-system hot backup are divided into pure software and shared storage media, among which dual-system hot backup based on storage sharing is the most standard solution for dual-system hot backup. [0003] Shared storage method: The two devices are mutually backed up, and the input information of the device and the intermediate parameters and output of the current master device's operation process are all stored in a shared storage medium. The slave device queries the internal data of the storage medium at a fixed cycle, and finds that the master device does not update the data in time, then switches the master-slave control, and the slave device takes over the master device to provide services. The advantage ...

AI Technical Summary

Problems solved by technology

The cost and execution efficiency of this method depend on the selected redundant communication method. The method with high execution efficiency usually has high cost. The disadvantage is that the redundant communication is single, which depends on the single communication protocol stack of the software and the application judgment process.

Once there is a problem with the redundant communication interface or the software redundancy judgment branch, it will lead to the failure of the hot standby redundancy, resulting in potential safety hazards

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