A clock synchronization control system and method for multiple redundant controllers

Abstract

The invention discloses a clock synchronizing control system and method of a multi-redundancy controller. A multi-redundancy system comprises at least two clock synchronizing systems which are independent from each other. Each clock synchronizing system comprises a processor, a clock synchronizing module, a clock diagnosing module and a system monitoring module, wherein the processor is connected with the clock synchronizing module; the clock synchronizing module sends synchronizing signals and clock signals and receives synchronizing signals from other clock synchronizing systems; the clock diagnosing module conducts diagnosis on the clock signals of the clock synchronizing system and the clock signals of other clock synchronizing systems, and then sends corresponding state signals to the clock synchronizing module; the system monitoring module is connected with the clock synchronizing module and the clock diagnosing module, and conducts monitoring on the clock synchronizing module and the clock diagnosing module. The clock synchronizing method comprises the step that the clock synchronizing modules accomplish logical judgment according to the synchronizing signals, the state signals and priority information, so that all the clock synchronizing systems accomplish clock synchronization.

Description

technical field [0001] The invention relates to a clock synchronization control system and method, in particular to a clock synchronization control system and method for multiple redundant systems. Background technique [0002] Due to the many uncertain factors in the industrial site environment, there are very high requirements for the reliability and safety of the industrial control system. Fault avoidance and fault tolerance are two key technologies in improving system reliability and security. Error avoidance means avoiding errors, that is, using correct design and quality control methods to avoid introducing errors into the system as much as possible, that is, using high-reliability devices, etc. However, since the indicators of high-reliability devices are affected by process technology and cost, and no matter what technology is used, it is impossible to avoid the occurrence of failures no matter how the manufacturing process is controlled, so the potential for improv...

AI Technical Summary

Problems solved by technology

The software implementation is relatively flexible, with good applicability and compatibility, but due to the inherent and inevitable large delay in the communication between various systems, the synchronization effect is not good

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