Peer-to-peer communication method and system for distributive control system

Abstract

The invention discloses a peer-to-peer communication method and a peer-to-peer communication system for a distributive control system. The method comprises the following steps of receiving a periodic data request at the front end of an operation station; transferring the data request to the rear end of the operation station; simultaneously obtaining and returning corresponding data at a data sharing area at the front end of the operation station according to the data request; visiting a corresponding control station at the rear end of the operation station according to the data request; obtaining relative data periodically from the control station; and updating the related data to the data sharing area. By adopting the method and the system, the reliability and the high efficiency of data communication between the control station and the operation station can be improved.

Description

technical field [0001] The invention relates to the technical field of industrial automation control, more specifically, to a peer-to-peer communication method and system of a distributed control system. Background technique [0002] At present, DCS (Distributed Control System, Distributed Control System) has been widely used in nuclear power, thermal power, chemical industry and other fields. [0003] In the DCS system, the system network is the network that realizes the communication between the monitoring level and the control level. Generally, industrial Ethernet is used. There are generally at least two types of stations on the system network: the control station and the operation station; among them, the control station realizes the on-site data exchange. Acquisition, calculation and control, the operation station realizes the monitoring, operation and management of on-site data. The control station and the operation station rely on mutual communication to complete da...

AI Technical Summary

Problems solved by technology

However, the biggest problem with this structure is that the two servers acting as data servers become de facto data gateways and become the bottleneck of system reliability. A certain failure of the data server will cause the communication failure of the entire system and cause the entire DCS system to be paralyzed , the reliability of the system is very low, it is difficult to meet the reliability requirements of industrial control systems

[0006] Since the control station needs to communicate with each operation station, when the system scale becomes larger, that is, after the number of operation stations increases, multiple operation stations simultaneously request data from the control station, which will increase the load on the system network and easily cause System instability factors make data communication inefficient; in addition, this communication mode has extremely high requirements on the network performance of the controller, and the performance of general embedded controllers is difficult to meet the requirements. If a high-end processor chip is configured, it will cause system sharp increase in cost

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