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Universal network adapter

A network adapter and adapter technology, which is applied in the direction of data exchange and data exchange details through path configuration, can solve problems such as inability to connect to the Internet, and achieve the effect of extending communication distance and facilitating centralized monitoring and management

Active Publication Date: 2010-03-03
CISDI ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Network technology has penetrated into various fields of industrial control, but there are still many stand-alone devices in the industrial field that provide RS-232 serial ports or other forms of communication interfaces to complete point-to-point communication, but it is impossible or not easy to network them

Method used

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Embodiment Construction

[0018] According to accompanying drawing, the present invention is further described as follows:

[0019] figure 1 Shown: computer 2 includes one or more central processing units (CPU) 104 (only one is shown), volatile memory 124, non-volatile storage device 106, operating system 108, 2 serial port drivers 116 and 118, 2 serial physical interfaces, application programs 110 and 112 execute in memory 124 and are capable of transmitting and receiving data from a remote computer via the serial interface. Computer 102 may include any computing device known in the art, such as mainframes, servers, personal computers, workstations, laptops, handheld computers. Various CPU 104 and operating system 108 known in the art may be used. Programs and data in memory 124 may be swapped to storage device 106 as part of memory management operations. Application 1 is an application program that establishes communication with a remote station and performs functions such as program upload and do...

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Abstract

The invention relates to a general network structure, in particular to an interaction system of RS-232 and RS-422 / RS-485 for industrial control and a universal network adapter. The universal network adapter has two interfaces: a first bus interface and a second bus interface. The first bus interface is used for monitoring data flows, containing address information, broadcasted by a host computer;the second bus interface is responsible for data exchange between a main application of the host computer and a remote station; the opening of the second bus interface is controlled by the network adapter according to the address information received by the first bus interface; and a singlechip completes the data reception and transmission of the first bus interface and the control of the second bus interface. The universal network adaptor can uniformly convert the communication interfaces of the same protocol or different protocols of the equipment of the same kind or different kinds from thesame manufacturer or different manufacturers into RS-422 / RS-485 and assigns address to form a star, ring, bus or hybrid industrial control network while greatly increasing communication distance andfacilitating centralized monitoring and management.

Description

technical field [0001] The invention relates to a general network structure, in particular to a universal network adapter for an industrial control system in which RS-232 and RS-422 / RS-485 interact. Background technique [0002] There are two ways of serial communication and parallel communication for data transmission between computers or between computers and terminals. Because the serial communication method has fewer lines and low cost, especially in long-distance transmission, it avoids the inconsistency of the characteristics of multiple lines and is widely used. In serial communication, both communication parties are required to adopt a standard interface, so that different devices can be easily connected for communication. [0003] RS-232-C interface, also known as EIARS-232-C, is the most commonly used serial communication interface at present. It is a standard for serial communication jointly developed by the Electronic Industries Association (EIA) in conjunction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/02H04L12/28
Inventor 刘安平彭燕华
Owner CISDI ENG CO LTD
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