Research On Traffic Control Based On Modbus RS-485Bus Communication System

RS-485bus gets an extremely wide range of applications in industry. For congestion based on Modbus protocol RS-485bus communication system needs a lot of information that appears in the transmission, the thesis studies the traffic control protocol solution based on Modbus RS-485bus network, using a traffic control protocol to effectively solve congestion problems due to the transfer large amounts of information. This thesis studies the Modbus communication protocol and traffic control protocol, the main works are as follows:(1)The principles and workflow based on Modbus communication protocol and traffic control protocol, modular design are presented in detail Modbus protocol and traffic control protocol detailed modular design, that should bear specific modular the task for the integration of Modbus protocol and traffic control protocol to provide the conditions and favorable basis.(2)The quantum entanglement in quantum information theory applied to the traffic control protocol sliding window protocol proposed sliding window protocol based on quantum entanglement. Build a quantum channel, quantum entanglement communication process proposed sliding window protocol of quantum communication, and the effective specific performance analysis shows that the sliding window protocol can effectively improve the quantum efficiency of communication from quantum information theory,(3)Combined with traffic control protocol and Modbus protocol modular design, proposed solutions based on the integration module Modbus and traffic control. The integration of the flow control protocol to Modbus protocol Modbus communication network to address emerging in the network congestion problem. While serial communication technology, the use of traffic control protocol two rate three color marker algorithm to construct master and slave protocols stack, simulation of the Modbus communication.The main issue is the application of industrial communication system based on RS-485bus, the proposed protocol is necessary for testing and real-time communication in various industrial equipment inspection. Only be detected and used widely, find the shortcomings, so as to ensure that the protocol universal.