Field bus network controller

A network controller and field bus technology, applied in the field of automation systems, can solve problems such as difficulty in realizing interchangeability and interoperability, and equipment cannot be interconnected together, and achieve the effect of a wide range of applications

Inactive Publication Date: 2005-12-21
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

In the process of forming the DCS system, due to the influence of the system closure defect that existed in the early stage of the computer system, the products of each manufacturer formed their own system, and the equipment of different manufacturers could not be interconnected together. This closed and dedicated solution It is difficult to achieve interchange and interoperability, and there are many difficulties in forming a network system for wider information sharing

Method used

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Embodiment Construction

[0047] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] Such as figure 1 As shown, the hardware features of the present invention include:

[0049] A controller central processing unit (CPU), the present embodiment adopts i80386EX central processing unit;

[0050] A dual-port memory (DPRAM), accessed between the field bus, the data bus and the central processing unit (CPU) of the controller and the central processing unit of the host machine connected through the interface circuit of the industry standard structure;

[0051] A random access memory (RAM), which communicates with the field bus as the controller central processing unit (CPU), is connected to the central processing unit (CPU) by the field bus and the data bus;

[0052] A programmable read-only memory (EPROM), which stores the control program; connects with the central processing unit (CPU) of the controller and the fi...

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Abstract

The invention relates to an automation system, in particular to a field bus network controller. Including central processing unit, dual-port memory, random access memory, programmable read-only memory, storing control program; standard ISA interface circuit, field bus interface; wherein: control program consists of field bus message specification module, field bus access sublayer module, It consists of system management module, network management module, data link layer module and link active scheduler. It completely disperses the control function to the field, and relies on the field intelligent device itself to realize the basic control function, which is used for process automation or manufacturing automation field device interconnection communication network.

Description

technical field [0001] The invention relates to an automation system, in particular to a field bus network controller used for process automation or manufacturing automation field device interconnection communication network. Background technique [0002] In the prior art, the field bus control system is a base-type pneumatic instrument control system, an electric unit combined analog instrument control system, a centralized digital control system, and a distributed control system, among which the distributed control system (DCS) is mainly used. One or more "control units" control the multiple loops, and the control part is distributed to a number of control boards, each with multiple loops. In the process of forming the DCS system, due to the influence of the system closure defect that existed in the early stage of the computer system, the products of each manufacturer formed their own system, and the equipment of different manufacturers could not be interconnected together...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/00
Inventor 王宏于海滨杨志家魏剑巍周侗赵海燕
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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