A Fieldbus Data Acquisition System

Abstract

The invention relates to a Profibus data acquisition system which is applied to a power plant Profibus monitoring system. The Profibus data acquisition system comprises analysis modules, communication modules, an Ethernet switch and a photoelectric converter, and is characterized in that the analysis modules are respectively connected to Profibus network segments in series, carry out packaging and parsing on messages of the network segments based on Profibus protocol rules, and realize monitoring for communication data of the network segments; the communication module is communicated with the analysis modules through a backplane bus, collects multiple paths of network segment information collected by the plurality of analysis modules, packages the information based on a TCP / IP protocol and uploads the packaged information to the Ethernet switch; the Ethernet switch is connected with a plurality of communication modules, collects data and forwards data frames to the photoelectric converter; and the photoelectric converter realizes remote data communication between a cabinet and an plant-level SIS (supervisory information system) machine room. The Profibus data acquisition system is small in module size and flexible in combination, does not require extension setup, can be used as soon as being connected, and provides a basis for data acquisition and further sampling analysis of an upper computer.

Description

technical field [0001] The invention belongs to the technical field of electric power monitoring and relates to a field bus data acquisition system applied to a thermal power plant. Background technique [0002] Fieldbus is an industrial data bus that has developed rapidly in recent years. It mainly solves the digital communication between field devices such as intelligent instruments and meters, controllers, and actuators on the industrial scene, as well as the communication between these field control devices and advanced control systems. Information transfer problem. Among the existing bus standards, Profibus field bus is a field bus standard suitable for power generation enterprises, and is widely used in the field bus system of thermal power plant units in my country. However, the current fieldbus data acquisition system mostly relies on acquisition and communication modules of foreign brands, and domestic modules have limited load capacity and high system cost. Cont...

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Problems solved by technology

[0003] In order to overcome the problems of low loading capacity, low autonomy and high cost of existing power plant bus data acquisition modules, the present invention provides a field bus data acquisition system

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