Modbus TCP master-slave station configuration method and system based on BLVDS bus

By generating configuration data on the host computer and using the PLC controller and ModbusTCP communication device for protocol conversion, the compatibility problem between BLVDS bus and ModbusTCP device is solved, realizing flexible and efficient data communication and device mode switching, and improving the communication capability of the fieldbus control system.

CN120050342BActive Publication Date: 2026-06-05ZHEJIANG UNIV +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2025-02-08
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Compatibility issues between the BLVDS bus and Modbus TCP master/slave stations prevent direct data communication and make it difficult to access and control Modbus TCP slave devices via the BLVDS bus, thus limiting the development of fieldbus control systems.

Method used

By generating configuration data on the host computer, using the PLC controller and ModbusTCP communication device for protocol conversion, the BLVDS bus and ModbusTCP device are configured as master-slave mode, and data transmission and parsing are realized through Ethernet communication link, supporting data exchange in master and slave modes.

Benefits of technology

It enables flexible and efficient data communication between BLVDS bus and ModbusTCP devices, supports switching between master and slave modes, adapts to different application scenarios, builds a stable and reliable communication link, and ensures accurate issuance of control commands and timely acquisition of response data.

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Abstract

The application provides a Modbus TCP master-slave station configuration method and system based on a BLVDS bus, S1: generating configuration data for internal Modbus TCP devices in an upper computer, and transmitting the configuration data to a PLC controller through an Ethernet communication link; S2: the PLC controller transmits the configuration data to a Modbus TCP communication device through a BLVDS bus, and the Modbus TCP communication device configures internal Modbus TCP devices as a master station mode or a slave station mode; S3: in the master station mode, the upper computer sends control instructions to external Modbus TCP slave station devices by using internal Modbus TCP master station devices, and receives response data returned by the external Modbus TCP slave station devices; in the slave station mode, the PLC controller drives internal Modbus TCP slave station devices to work based on control instructions sent by external Modbus TCP master station devices and received by the internal Modbus TCP slave station devices, and returns response data to the external Modbus TCP master station.
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