The Application Of Modbus Protocol In The Huatugou Union Station

With the continuous development of automation technology and communication technology, automation technology and communication technologies are increasingly closely related to both each other.In the course of development of industrial control systems, network technology is more and more embedded in, implementation of visits between equipment and mutual dialogue is no longer a dream, and gradually translated into reality, and Modbus Protocol in the language of dialogue is the most popular protocol in the industrial sector, which in a simple, easy to operate, stable performance won the favor of industry control programming and configuration staff.This article focused on the application of Modbus Protocol in Qinghai oilfield huatugou Union station.for cases to PLC and DCS communications, from electrical agreement consistency, and communications agreement consistency, and user agreement consistency, Modbus Protocol of communications process are explained at some length. In this article,each of three a aspects is described from principle describes to actual application. Combining theory with practice makes us understanding entire communications process of Modbus protocol bitterly.After this article finishes introduction of Modbus protocol communication process, it combines with actual application of Modbus protocol in Huatugou Union station and proposes the inadequacy and improvement measures in the running process.