Fieldbus communication card

A fieldbus and communication card technology, applied in the field of automatic control, can solve the problems of unable to develop FoundationFieldbus and PROFIBUSPA fieldbus communication cards, etc., and achieve the effect of low cost, flexible interface mode and high performance

Active Publication Date: 2010-06-09
MICROCYBER CORP
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  • Abstract
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  • Application Information

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Problems solved by technology

[0014] In order to solve the current situation that the Foundation Fieldbus and PROFIBUS PA fieldbus communication cards cannot be developed in China, and to get rid of the dependence on imported fieldbus instruments, the purpose of this invention is to provide a method based on the same hardware that can run both the Foundation Fieldbus protocol and the Profibus PA protocol. , low-cost fieldbus communication card

Method used

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0041] like figure 1As shown, the present invention includes: a bus signal filter circuit, a bus power supply / current modulation circuit, a bus voltage signal modulation circuit, a field bus communication controller, and a main control circuit. External interfaces include bus interface, power output, instrument card communication interface, and display interface. Its connection relationship: the bus signal filter circuit, the bus voltage signal modulation circuit, the field bus communication controller and the main control circuit are powered by the bus power supply / current modulation circuit, the input terminal of the bus signal filter circuit receives the signal on the bus through the bus interface, and outputs The signal is a filtered and shaped digital signal, which is decoded by the field bus communication controller and sent to the main control circuit...

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Abstract

The invention relates to the field of automatic control, and in particular discloses a fieldbus communication card, which is used for coding and decoding fieldbus data based on an FBC0409 fieldbus controller. The fieldbus communication card also comprises a fieldbus signal filter circuit for receiving bus signals, a bus voltage signal modulation circuit for converting coded digital signals into voltage signals corresponding to the waveform of the bus signals, a master control circuit communicated with the fieldbus communication controller and other peripheral equipment, and a bus power supply / current modulation circuit. The fieldbus communication card solves the problem that Foundation Fieldbus and PROFIBUS PA fieldbus communication cards cannot be developed currently at home, gets rid of dependence on imported fieldbus instruments, and has the characteristics of running two fieldbus protocols of Foundation Fieldbus and Profibus PA based on the same hardware, having low cost and the like.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a field bus communication card based on FBC0409. The communication card supports bus power supply and conforms to the IEC61158-2 physical layer standard. As the core equipment of intelligent sensors and controllers, communication cards provide the necessary control, acquisition and display interfaces for industrial field instruments and sensors. The field bus communication card is combined with the traditional instruments and meters to form the field bus equipment. Background technique [0002] With the development of control, computer, communication, network and other technologies, the field of information exchange and communication is rapidly covering all levels from field equipment to control and management. The development of information technology has had a profound impact on the structure of automation systems, gradually forming an enterprise information system based on n...

Claims

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Application Information

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IPC IPC(8): H04L12/28H04L29/08G05B19/418
CPCY02P90/02
Inventor 于海斌王宏赵海燕林跃康凯
Owner MICROCYBER CORP
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