Protocol converting method and device between in-situ bus and serial interface equipment

A fieldbus and serial interface technology, which is applied in the field of protocol conversion between fieldbus and serial interface equipment, can solve the problem of not involving fieldbus and digital serial interface protocol conversion, and reduce system cost and engineering difficulty. , the effect of improving compatibility

Inactive Publication Date: 2003-01-01
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, there is no content related to fieldbus and digital serial interface protocol conversion in the published patent literature

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  • Protocol converting method and device between in-situ bus and serial interface equipment
  • Protocol converting method and device between in-situ bus and serial interface equipment
  • Protocol converting method and device between in-situ bus and serial interface equipment

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] exist figure 1 , the main program first reads the parameter data stored in the non-volatile memory and initializes the field bus interface and serial interface according to the parameter data; the parameter data includes: serial interface baud rate, data bit, stop bit, parity Parity bit, and the transmission mode definition of the serial transmission protocol and fieldbus interface parameters, etc. Fieldbus interface parameters include station address, message buffer pointer and length, etc.

[0039] The main program waits for the interrupt request sent by the field bus protocol chip and enters the interrupt program, which receives the parameterization message and the configuration check message (Config-Check) of the field bus master device. After processing the message correctly, enter the data exchange state with the fieldbus master device, and ret...

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Abstract

The present invention is the protocol converting method and device between in-situ bus and serial interface equipment. In the device structure, the micro controller is connected to in-situ bus protocol chip, static memory, non-volatile memory via the inner bus; the in-situ bus protocol chip, photoelectronic isolator and in-situ bus interface are connected successively; and there is serial interface connected to the inner bus for the serial port equipment to connect. Adopting the device of the present invention needs no additional software and hardware in integrating common serial port equipment to in-situ bus system, no altering the control software interface and serial interface equipment of upper position. The present invention has reduced system cost and engineering difficulty and greatly raised compatibility.

Description

technical field [0001] The invention belongs to the field of peripheral equipment of computer field bus, in particular, the invention relates to a protocol conversion method and device between field bus and serial interface equipment. Background technique [0002] In the field of industrial automation, there are a large number of instruments and equipment with serial interfaces, which collect physical quantities such as pressure, flow, displacement, and temperature from industrial sites, convert them into electrical signals through sensors, and transmit them through digital serial interfaces after processing. Go to the upper device, or receive commands and data from the upper device through the serial interface, control the work of the execution components, and complete the given task. Usually, a master-slave control system can be composed of a host device and multiple serial interface instrument devices. [0003] In the past two decades, fieldbus control systems have been ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42
Inventor 周祖德陈幼平陈冰谢经明艾武张冈
Owner HUAZHONG UNIV OF SCI & TECH
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