Master-slave adaptive communication system based on RS485 bus and communication method thereof

By using a master-slave adaptive communication system based on RS485 bus to dynamically switch master and slave roles, the problems of insufficient data transmission efficiency, scalability and reliability of MODBUS-RTU protocol are solved, and an efficient and reliable communication system is realized.

CN117579418BActive Publication Date: 2026-06-02JIANGYIN ACREL ELECTRICAL APPLIANCE MFGCO +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGYIN ACREL ELECTRICAL APPLIANCE MFGCO
Filing Date
2023-11-28
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The existing MODBUS-RTU protocol based on RS485 bus has shortcomings in data transmission efficiency, scalability and reliability, especially in complex industrial environments where communication efficiency is low, the number of slave stations is limited and wiring complexity is high.

Method used

A master-slave adaptive communication system based on RS485 bus is adopted. The master-slave adaptive protocol is implemented through two RS485 communication units, which simplifies wiring and address settings, and dynamically switches master and slave roles to improve communication efficiency and scalability.

Benefits of technology

It improves the real-time performance, scalability, and reliability of the communication system, simplifies the on-site debugging process, reduces after-sales replacement costs, and improves data transmission efficiency and system analysis speed.

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Abstract

The application relates to a master-slave adaptive communication system based on an RS485 bus and a communication method thereof, two communication ports are in a one-master-one-slave relationship, so that a communication address does not need to be additionally set, and the efficiency of on-site debugging is greatly improved; without the concept of a communication address, the convenience of expansion is simplified, and the modules can be directly connected by hand in hand; and the traditional MODBUS-RTU polling mode does not need to be inquired again, the efficiency of data transmission is greatly improved, the time for the host to traverse all data is greatly shortened, the data of the whole system is refreshed more quickly, and powerful guarantee can be provided for the system to analyze data more quickly.
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