Economical RTU communication method and system based on MODBUS protocol

Abstract

The invention discloses an economical RTU communication method and system based on a MODBUS protocol, and the method comprises the steps: enabling a module to be provided with a transmitting channel and at least two receiving channels, enabling the two receiving channels to achieve the automatic confirmation and retransmission functions, enabling a data packet to be broadcasted without starting ART when a frequency hopping synchronization packet is transmitted, and when the preamble data packet and the data packet are sent, starting ART to enable communication to be reliable, a common built-invalue-added mechanism of an economical module is utilized to the maximum extent, so that the burden of the microcontroller is reduced, and frequency hopping and interference resistance are achieved through a protocol. The protocol does not need a built-in frequency hopping capability or a coprocessor of a wireless module, so that the dependence and the requirement on the module are reduced, and high economy is truly realized. Compared with other protocols, the frequency hopping synchronization is carried out in idle time instead of initiating communication, so that the idle time power consumption is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to an economical RTU communication method and system based on the MODBUS protocol, which is suitable for the development of economical wireless industrial control products. Background technique [0002] With the increasing innovation of Internet of Things technology, Internet of Things devices have gradually penetrated into all aspects of people's daily life. Among them, MODBUS-RTU is a communication protocol commonly used in the Industrial Internet of Things. It has simple wiring, good anti-interference, and easy development. It is widely accepted and applied. It is a very mature and economical bus technology. [0003] MODBUS-RTU technology has a history of many years, so it has accumulated a large number of special codes and technologies, most of which have been verified in production. However, MODBUS-RTU needs a pair of RS-485 twisted pair, and in many occasions, such...

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Problems solved by technology

[0014] The purpose of the present invention is to propose an economical RTU communication method and system based on the MODBUS protocol, to solve one or more technical problems in the prior art, at least provide a beneficial choice or create conditions

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