A PLC system communication method and system based on a DCS redundant network

By connecting the PLC to the DCS redundant network, utilizing the same IP network segment and native communication protocol, and combining with the redundancy protection module, the problems of single point of failure risk, high cost and inconvenient maintenance in the communication integration of DCS and PLC systems are solved, realizing highly reliable, low-cost and convenient maintenance industrial production communication.

CN122411237APending Publication Date: 2026-07-17YANGCHUN NEW STEEL CO LTD
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Patent Information

Application Number
CN202610588475.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-30
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing communication integration methods of DCS and PLC systems have problems such as high risk of single point of failure, high hardware cost, inconvenient maintenance and poor system scalability, which make it difficult to meet the industrial production requirements for communication reliability, cost control and convenient maintenance.

Method used

By directly connecting the PLC to the DCS's redundant industrial Ethernet, utilizing the DCS's existing redundant network infrastructure, adopting the same IP address segment and native communication protocol, and combining with a redundancy protection module, direct communication and redundant backup between the PLC and the DCS can be achieved, eliminating the need for dedicated communication modules and supporting equipment.

Benefits of technology

It reduces hardware and cabling costs, improves communication reliability and system scalability, enhances maintenance convenience, achieves network availability of over 99.9%, supports remote program access and troubleshooting, and is suitable for industrial production systems of different sizes.

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Abstract

The application provides a PLC system communication method and system based on a DCS redundant network, relates to the technical field of industrial automation control system communication network integration, and comprises the following steps: network architecture reconstruction, direct access of a programmable logic controller (PLC) to a redundant industrial Ethernet of a distributed control system (DCS), and formation of a unified local area network; IP address planning, allocation of addresses of the same preset IP network segment to controllers of the DCS, PLCs, industrial personal computers and optional communication modules, and ensuring direct communication between devices; the application can save special communication modules and supporting equipment, reduce direct hardware cost, reduce cabinet space occupation and wiring cost by fully utilizing the existing redundant network infrastructure of the DCS; for a system containing multiple PLCs, the cost advantage is more obvious, no additional investment in redundant communication hardware is needed, and the overall investment is further reduced.
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