Field bus communication adapter with configurable characteristic

A technology of communication adapter and field bus, which is applied in the direction of bus network, data exchange through path configuration, electrical components, etc. It can solve the problems of poor flexibility and practicality, obstacles, etc., and achieve the effect of saving the number of wires and reducing investment

Inactive Publication Date: 2006-06-21
SHANGHAI ELECTRICAL APPLIANCES RES INSTGROUP
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Problems solved by technology

[0005] For DeviceNet communication adapters, at present, (DeviceNet) adapters at home and abroad can only send certain fixed data packets of the device to the master station, which is very poor in flexibility and practicability
Traditional adapters generally can only be connected to a certain fixed device. For the same type of device, the communication protocols on the serial port side are different due to different

Method used

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  • Field bus communication adapter with configurable characteristic
  • Field bus communication adapter with configurable characteristic
  • Field bus communication adapter with configurable characteristic

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with drawings and embodiments.

[0022] refer to figure 1 , which is a hardware system structure diagram of the configurable communication adapter of the present invention.

[0023] As shown in the figure, the hardware structure includes DeviceNet interface, CAN bus transceiver, MCU, optocoupler isolation circuit, RS485 bus transceiver, RS232 interface, power conversion and protection circuit, EEPROM, DIP switch, DC-DC power isolation circuit, Serial port indicators and DeviceNet network and module indicators.

[0024] The above-mentioned hardware structure is based on the original communication adapter hardware platform, and the major changes include: (1) The main control chip is replaced, and the original AT89C51CC01 main chip of ATMEL is replaced by Fujitsu's 16-bit MCU MB90F352S; (2) The design of the power isolation circuit is simplified, and the DC-DC power isolation circuit originally designed...

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Abstract

The invention relates to a field bus communication adaptor with configurable character, which comprises: a DeviceNet interface, a CAN bus transceiver, a MCU, an optical coupling insulation circuit, a RS48 bus transceiver, a RS232 interface chip, a power switch and protection circuit, an EEPROM, a dial switch, a DC-DC power insulation circuit, a serial indicator light, an adapter module indicator light, and a network indicator light. Wherein, it stores in main CPU auto baud rate upload/download process, main program process, configuration program process, running program process, algorithm program process to search CLASS ID and ATTRIBUTE ID, search program process for DeviceNet-Modbus mapping relation, and serial ISR process. This invention has super performance.

Description

technical field [0001] The present invention relates to a field bus device communication adapter with configurable characteristics, more precisely a communication adapter for protocol conversion between (Modbus) protocol and (DeviceNet) protocol. Background technique [0002] With the development of science and technology, a (DeviceNet) bus technology has been developed, which is changing the appearance of some fields. [0003] The DeviceNet bus technology adopts the data bus, and the master station only needs to lead out two or a few lines to connect various field devices to provide configuration, monitoring and diagnosis functions for the devices. [0004] The development of bus technology has brought great impact to low-voltage electrical products, but due to the diversity of (DeviceNet) network data and the flexibility of exchange, (DeviceNet) network does not have a complete and integrated protocol chip, and the development cycle of DeviceNet interface is relatively lon...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/40
Inventor 刘健王伟
Owner SHANGHAI ELECTRICAL APPLIANCES RES INSTGROUP
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