Intelligent device based on MODBUS extension, communication system and method

Abstract

The invention provides an intelligent device based on MODBUS extension, a communication system and method. The data reporting process can be simplified, the instantaneity of reporting information is guaranteed, and the communication process becomes stable and reliable. The intelligent device based on the MODBUS extension provided by the invention is characterized by comprising a device information acquisition part for at least acquiring the device data information based on the information acquisition rule; an information storage part for storing the device data information; a reporting information acquisition part for acquiring the corresponding device data information from the information storage part as the to-be-reported information based on the information reporting rule; and a communication part for actively sending the to-be-reported information to a monitor terminal without needing the reporting instruction of the monitor terminal.

Description

technical field [0001] The invention relates to a smart device based on MODBUS expansion, an Internet of Things communication system containing the smart device and a communication method thereof. Background technique [0002] The MODBUS protocol is a standard industrial communication protocol widely used in the field of industrial control. The MODBUS protocol can interconnect various smart devices with monitoring devices such as cloud servers to form the Industrial Internet of Things, and then realize mutual communication, thereby realizing various data collection and monitoring operations on smart devices. [0003] In the MODBUS protocol, the initiator of the communication process is the monitoring device, that is, the monitoring device is the master station (Master), and the smart device is the slave station (Slave). The master station needs to establish a TCP connection with the slave station, and each operation requires the master station Initiate an inquiry, the slave...

AI Technical Summary

Problems solved by technology

[0004] In the above process, the master station needs to know the IP address of the slave station, and in the IoT scenario, the slave station is generally located in the internal network, and the master station on the Internet cannot connect to the slave station; at the same time, due to the large number of smart devices in the industrial network , each device may have a lot of data, and the polling density may also be very high. In this polling mode, the workload of smart devices and monitoring devices is heavy, which requires a large network bandwidth and a large operation delay. , leading to data reporting lag, affecting real-time performance, and reducing the capacity of monitoring equipment connected to smart devices, and this high-load, high-bandwidth working method will also affect the stability and reliability of the entire system communication process

[0005] The MODBUS protocol was originally a communication protocol inside the factory. When it is used for cloud communication in the Internet of Things, since the data transmitted by the MODBUS protocol is not authenticated and encrypted, it will inevitably bring about security problems.

Images