An automated process safety monitoring system based on modbus protocol

Abstract

The invention discloses an automation process safety monitoring system based on a Modbus protocol. The automation process safety monitoring system comprises a monitoring main machine, a full-function slave machine and simple-function slave machines. The full-function slave machine has a monitoring function and a linkage control function, and each simple-function slave machine only has a monitoring function. In automation process safety monitoring, the full-function slave machine is bound with a plurality of appointed simple-function slave machines, the full-function slave machine starts a Modbus communication network message to recognize a receiving program, monitoring data sent by the bound simple-function slave machines are analyzed out, whether the monitoring signal parameters of the bound simple-function slave machines are normal is judged, and linkage interlock protection is carried out if abnormity is found. The automation process safety monitoring system solves the problem that direct linkage control between slave machines cannot be achieved due to the fact that the slave machines cannot communicate with each other. Furthermore, the timeliness of the monitoring system is improved.

Description

technical field [0001] The invention relates to the field of automation control, in particular to a safe operation monitoring system in the automation control process. Background technique [0002] With the rapid development of automation control technology, automation production and control equipment are widely used in various fields of industrial and agricultural production. This highly automated and integrated development trend puts forward higher requirements for safe operation in the automation control process. [0003] Modbus communication protocol is a bus protocol used in industrial field. It is famous for its simple and compact frame format, simple user system development and easy use. In 2008, my country promulgated GB / T 19582-2008 "Industrial Automation Network Based on Modbus Protocol "Specification" national standard, which further promotes the popularization of the application of Modbus communication protocol in the field of automation control in my country. Ho...

AI Technical Summary

Problems solved by technology

This solution includes a monitoring master, a full-featured slave and a simple-function slave. Different types of slaves are responsible for different tasks. The full-function slave has monitoring and linkage control functions. The machine is bound with the full-featured slave machine to solve the problem that the Modbus protocol cannot realize the direct linkage control between the slave machines because the slave machines cannot communicate with each other.

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