An optical communication circuit of functional modules and controllers in a dcs control system

Abstract

The invention relates to the technical field of communication circuits and discloses an optical communication circuit of functional modules and controllers in a DCS (data transmission system) control system. The optical communication circuit is used for realizing data exchange between a first CPU (central processing unit) IC1 and a second CPU chip IC4. The optical communication circuit comprises a first transceiver IC2 and a second transceiver IC3 which are identical in structure, each of the first transceiver IC2 and the second transceiver IC3 comprises a signal receiving circuit, a signal sending circuit and a logic controller connected with the signal receiving circuit and the signal sending circuit. By adding an optical transceiving circuit, plug-in-free data transmission between functional modules, between the functional modules and the controllers and between the controllers are realized, quality of communication is guaranteed, electromagnetic interference is eliminated, service life is prolonged, communication speed is increased, hot plugging and unplugging of a communication module is achieved, operation quality of the DCS control system is guaranteed effectively, and risks in controlling is greatly lowered.

Description

technical field [0001] The present invention relates to the technical field of communication circuits, and more specifically relates to an optical communication circuit of a functional module and a controller in a DCS control system. Background technique [0002] With the continuous expansion of automation technology in various fields, the stability and applicability of users for DCS systems are also constantly improving. [0003] In the traditional DCS system, serial bus communication is used between functional modules and controllers, between functional modules and functional modules, between controllers, and connectors are used to connect hardware. Contact resistance, the longer the service life, the worse the reliability; In addition, the data in the system cannot completely avoid electromagnetic interference due to the wired transmission method. In the environment of strong electromagnetic interference, data transmission is likely to cause disorder. [0004] At the sam...

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Problems solved by technology

[0003] In the traditional DCS system, serial bus communication is used between functional modules and controllers, between functional modules and functional modules, between controllers, and connectors are used to connect hardware. Contact resistance, the longer the service life, the worse the reliability; In addition, the data in the system cannot completely avoid electromagnetic interference due to the use of wired transmission methods. In the environment of strong electromagnetic interference, data transmission is likely to cause disorder

[0004] At the same time, due to the wired connection method, the functional modules or controllers in the DCS control system may be damaged when plugged in with power. Therefore, in the traditional DCS system, it is generally advocated to replace the functional modules and controllers with power off to avoid DCS. Systematic control risk, at the same time, the entire operation process is relatively cumbersome

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