Communication management method for master station and slave station of Modbus device based on real-time database, and communication management system for master station and slave station of Modbus device based on real-time database

Abstract

The invention provides a communication management method for a master station and a slave station of a Modbus device based on a real-time database. The method provided by the invention has the advantages that valid data is stored through the real-time database so as to link up the conversion of different protocols, and the communication interconnection capability of the Modbus device is enhanced through the conversion of the three different protocols; signal integration of the process of the Modbus field device into a control station is achieved, and all the Modbus field device data is sent to an engineer station of a master control room; meanwhile, with the real-time database serving as a medium, and Modbus communication modules serving as carriers, other field device data signals accessing the control station can be open to a third-party system through a Modbus virtual device, so as to achieve open interconnection; a user in the control room can conveniently carry out remote view, modification and configuration of configuration information of the field device, and all the operations are recorded in the database, so as to be well documented, improve the maintenance rate and lower the production cost.

Description

technical field [0001] The invention relates to the technical field of industrial control systems and devices Modbus communication, in particular to a real-time database-based Modbus device master-slave station communication management method and system. Background technique [0002] CAN (Controller Area Network), which belongs to the category of field bus, is a serial communication network that effectively supports distributed control systems. It was developed by Bosch in Germany in the 1980s for the automotive industry. communication bus. Due to its high performance, high reliability, unique design, and the ability to detect any errors that occur, it has attracted more and more attention and has been widely used in many fields. When the signal transmission distance reaches 10km, CAN can still provide a data transmission rate up to 50kbit / s. Because the CAN bus has high real-time performance and application range, it can be arbitrarily matched from a high-speed network wi...

AI Technical Summary

Problems solved by technology

[0004] At present, the communication management method of the master-slave station of Modbus equipment is the one-way communication of the master-slave station of the Modbus equipment. A Modbus master station only allows communication with the Modbus slave station, but cannot exchange information with the third-party Modbus master station, and cannot realize open interconnection. As a result, information cannot be effectively shared and utilized

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