RTU suitable for MODBUS protocol and communication method thereof

Abstract

An RTU suitable for the Modbus protocol is used to implement communication between a field sensing instrument and a monitoring upper computer. The RTU comprises a data acquisition communication module, a main controller, and an upper communication processing module which are sequentially connected in communication. The data acquisition communication module is communicatively connected with severalgroups of field sensing instruments. The upper communication processing module is communicatively connected with the monitoring upper computer. The main controller comprises a plurality of Modbus address tables corresponding one-on-one to the several groups of field sensing instruments. The Modbus address tables are communicatively connected with a protocol processing and data converter, a parameter configuration Web server, and a Modbus server. The protocol processing and data converter is also communicatively connected with the data acquisition communication module. The Modbus server is also communicatively connected with the upper communication processing module. The invention provides a RTU suitable for Modbus protocol and a communication method thereof. The RTU can collect multiple sets of independent sensing instrument data, simulate multiple Modbus devices, reduce the number of remote field RTUs, and can conveniently and quickly configure parameters using the browser.

Description

technical field [0001] The invention relates to the field of industrial field communication equipment, in particular to an RTU suitable for the Modbus protocol and a communication method thereof. Background technique [0002] With the popularization and application of Internet of Things technology in industrial automation systems, more and more enterprises use Internet of Things technology to upgrade and transform the existing data acquisition and monitoring control system SCADA, and transform the original SCADA acquisition subsystem from the wired transmission mode. Replaced by a wireless sensor network approach. In order to connect the wireless sensor acquisition subsystem to the SCADA platform system using the field industrial bus technology, it is necessary to follow the SCADA field industrial bus protocol. Modbus protocol is a commonly used field industrial bus protocol. [0003] The Remote Terminal Unit (RTU) is the basic unit of the SCADA system. RTU is an electron...

AI Technical Summary

Problems solved by technology

The existing RTU does not directly support the conversion between the wireless sensor network protocol and the Modbus protocol, resulting in low work efficiency of the RTU

Moreover, industrial sites often need to detect multiple site locations, and multiple sensor instruments are arranged at each site site to detect multiple parameters to form a sensor group at the site site. The existing RTU is usually implemented as a Modbus device to monitor a For the sensor group at the site, when the number of site detection sites is large, the existing RTU needs to be deployed accordingly, which is inconvenient to use

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