CN202145647U - Protocol converter - Google Patents

Protocol converter Download PDF

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Publication number
CN202145647U
CN202145647U CN201120201967U CN201120201967U CN202145647U CN 202145647 U CN202145647 U CN 202145647U CN 201120201967 U CN201120201967 U CN 201120201967U CN 201120201967 U CN201120201967 U CN 201120201967U CN 202145647 U CN202145647 U CN 202145647U
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CN
China
Prior art keywords
circuit
processing circuit
treatment circuit
protocol converter
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201120201967U
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Chinese (zh)
Inventor
张炜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI EVER POWER AUTOMATION CO Ltd
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SHANGHAI EVER POWER AUTOMATION CO Ltd
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Priority to CN201120201967U priority Critical patent/CN202145647U/en
Application granted granted Critical
Publication of CN202145647U publication Critical patent/CN202145647U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a protocol converter belonging to the field of electro-communication technology. The protocol converter comprises a central processing unit (CPU), a controller area network (CAN) processing circuit, a serial port processing circuit, a power supply processing circuit and an optoelectronic isolation circuit, wherein the optoelectronic isolation circuit is used for receiving signals of a CAN and is connected with an input end of the CAN processing circuit; an output end of the CAN processing circuit is connected with the CPU and used for outputting digital signals; an output end of the CPU is connected with the serial port processing circuit and used for outputting control command; an output end of the serial port processing circuit is connected with an external network; and the power supply processing circuit is connected with the CPU, the CAN processing circuit, the serial port processing circuit and the optoelectronic isolation circuit, and is used for outputting a power source. The device is simple in structure, small in volume, low in power consumption and stable in data transmission, and supports the conversion between CAN-RS485 and CAN-RS-232.

Description

Protocol converter
Technical field
The utility model relates to the device in a kind of electronic communication field, specifically is a kind of industrial automation control and power automation control field-bus interface and hdlc bus interface realize exchanges data through 8 bit data bus and monolithic computer protocol converter based on P89V51RD2FN that is used for.
Background technology
Fieldbus is the communication network of bidirectional linked list multinode digital communication between a kind of field intelligent device that is applied to the industrial automation field, and it is the extension of factory computer network to field apparatus.The employing of fieldbus has caused the Shen section of automatic control system structure to change, and makes it become a kind of intellectuality, networking, open, full distribution control system, compares the previous generation Distributed Control System and has tangible technical advantage.Therefore the huge manpower and materials of each big automation manufacturer's input of the world are carried out the application study of field bus technique, strive for becoming the leader of industry.Because different bus standards is being represented the interests of different vendor, the competition between each standard is very fierce, after the development of having experienced a period of time and short-range technology integration, does not still form a kind of bus standard that can unify the whole market.At present, the bigger bus of influence mainly contains foundation fieldbus (FF), fieldbus process control (Profibus), control area net (CAN), general control network (Lonworks), addressable remote data network (HART) etc. in the world.In view of the diversity of field bus protocol, realize interconnectedly between the different fieldbus in order to make, it is particularly necessary that the use of fieldbus protocol converter seems.Use protocol converter can realize two kinds of transparent transmission between the different bus very easily, make the equipment of pursuing other bus protocol can be linked into existing field bus system, thereby make the composition of whole system more flexible.
The utility model content
The utility model provides a kind of protocol converter to the above-mentioned deficiency that prior art exists, simple in structure, volume is little, low in energy consumption, transfer of data stable, supports CAN-RS485, CAN-RS232 to change each other.
The utility model is realized through following technical scheme; The utility model comprises: central processing unit, CAN treatment circuit, serial ports treatment circuit, power supply processing circuit and photoelectric isolating circuit; Wherein: photoelectric isolating circuit receives the CAN signal and links to each other with the input of CAN treatment circuit; The output of CAN treatment circuit links to each other with central processing unit and exports digital signal; The output of central processing unit links to each other with the serial ports treatment circuit and exports control command, and the output of serial ports treatment circuit links to each other with external network, and power supply processing circuit is connected with photoelectric isolating circuit and out-put supply with central processing unit, CAN treatment circuit, serial ports treatment circuit respectively.
The output of described central processing unit is provided with indicator light;
Be equipped with the insulating power supply circuit between described power supply processing circuit and CAN treatment circuit and the photoelectric isolating circuit;
The output of described serial ports treatment circuit is provided with RS232 circuit and the RS485 circuit that input is in parallel, and the output of this RS232 circuit and RS485 circuit links to each other with external network respectively.
Present embodiment adopts very lagre scale integrated circuit (VLSIC) P89V51RD2FN IC chip based on the protocol converter of singlechip technology.The hardware designs refining is equipped with the technical grade original paper, reliable and stable, the stable operation of ensuring equipment.
The advantage of the utility model comprises: volume is little, strong interference immunity, long transmission distance, serial ports conversion are flexible.
Description of drawings
Fig. 1 is a structure chart of the present invention.
Embodiment
Embodiment in the face of the utility model elaborates down; Present embodiment is being to implement under the prerequisite with the utility model technical scheme; Provided detailed execution mode and concrete operating process, but the protection range of the utility model is not limited to following embodiment.
Embodiment
As shown in Figure 1; Present embodiment comprises: central processing unit 1, CAN treatment circuit 2, serial ports treatment circuit 3, power supply processing circuit 4 and photoelectric isolating circuit 5; Wherein: photoelectric isolating circuit 5 receives the CAN signal and links to each other with the input of CAN treatment circuit 2; The output of CAN treatment circuit 2 links to each other with central processing unit 1 and exports digital signal; The output of central processing unit 1 links to each other with serial ports treatment circuit 3 and exports control command, and the output of serial ports treatment circuit 3 links to each other with external network, and power supply processing circuit 4 is connected with central processing unit 1, CAN treatment circuit 2, serial ports treatment circuit 3 and photoelectric isolating circuit 5 respectively and out-put supply.
The output of described central processing unit 1 is provided with indicator light 6;
Be equipped with insulating power supply circuit 0 between described power supply processing circuit 4 and CAN treatment circuit 2 and the photoelectric isolating circuit 5;
The output of described serial ports treatment circuit 3 is provided with the RS232 circuit 7 and RS485 circuit 8 that input is in parallel, and the output of this RS232 circuit 7 and RS485 circuit 8 links to each other with external network respectively.
Described central processing unit 1 is the P89V51RD2FN singlechip microcomputer.
Described CAN treatment circuit 2 is made up of SJA100TCE9829 chip and DX16.000 crystal oscillator.
Described power supply processing circuit 4 is the 0505S-1WDC-DC insulating power supply.
Described photoelectric isolating circuit 5 is realized by photoelectric isolated chip and the K7805-500 switching regulator of two 6N137.
Described indicator light 6 is that a red light emitting diodes and two green LEDs are formed.
Described RS232 circuit 7 is made up of 82C250 communication chip and build-out resistor with RS485 circuit 8.
Basic functional principle is; The CAN signal of intelligent terminal gets into protocol converter through order wire; At first through photoelectric isolating circuit 5 external signal and internal signal are isolated, can effectively reduce the interference of external signal to the converter inside signal like this, the CAN signal of isolating through photoelectricity gets into CAN treatment circuit 2; Get into central processing unit 1 through CAN treatment circuit signal; Signal gets into central processing unit 1 back and converts CAN into serial communication through corresponding software, and through the signal entering serial ports treatment circuit 3 of conversion, serial port circuit is divided into RS485 and two kinds of communication modes of RS232 through the mode of short circuit route selection.

Claims (6)

1. protocol converter; It is characterized in that; Comprise: central processing unit, CAN treatment circuit, serial ports treatment circuit, power supply processing circuit and photoelectric isolating circuit; Wherein: photoelectric isolating circuit receives the CAN signal and links to each other with the input of CAN treatment circuit, and the output of CAN treatment circuit links to each other with central processing unit and exports digital signal, and the output of central processing unit links to each other with the serial ports treatment circuit and exports control command; The output of serial ports treatment circuit links to each other with external network, and power supply processing circuit is connected with photoelectric isolating circuit and out-put supply with central processing unit, CAN treatment circuit, serial ports treatment circuit respectively.
2. protocol converter according to claim 1 is characterized in that the output of described central processing unit is provided with indicator light.
3. protocol converter according to claim 1 is characterized in that, is equipped with the insulating power supply circuit between described power supply processing circuit and CAN treatment circuit and the photoelectric isolating circuit.
4. protocol converter according to claim 1 is characterized in that, the output of described serial ports treatment circuit is provided with RS232 circuit and the RS485 circuit that input is in parallel, and the output of this RS232 circuit and RS485 circuit links to each other with external network respectively.
5. according to claim 1 or 3 described protocol converters, it is characterized in that described photoelectric isolating circuit is realized by two photoelectric isolated chips and switching regulator.
6. protocol converter according to claim 2 is characterized in that, described indicator light is that a red light emitting diodes and two green LEDs are formed.
CN201120201967U 2011-06-15 2011-06-15 Protocol converter Expired - Fee Related CN202145647U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201120201967U CN202145647U (en) 2011-06-15 2011-06-15 Protocol converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201120201967U CN202145647U (en) 2011-06-15 2011-06-15 Protocol converter

Publications (1)

Publication Number Publication Date
CN202145647U true CN202145647U (en) 2012-02-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201120201967U Expired - Fee Related CN202145647U (en) 2011-06-15 2011-06-15 Protocol converter

Country Status (1)

Country Link
CN (1) CN202145647U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103780279A (en) * 2014-01-25 2014-05-07 济南诺辉节能技术开发有限公司 Indoor energy efficiency management terminal communication module
CN104600843A (en) * 2015-01-26 2015-05-06 国家电网公司 Power communication protocol conversion device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103780279A (en) * 2014-01-25 2014-05-07 济南诺辉节能技术开发有限公司 Indoor energy efficiency management terminal communication module
CN103780279B (en) * 2014-01-25 2015-08-26 山东诺辉节能技术开发有限公司 Indoor energy efficiency management terminal communication module
CN104600843A (en) * 2015-01-26 2015-05-06 国家电网公司 Power communication protocol conversion device

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C53 Correction of patent for invention or patent application
CB03 Change of inventor or designer information

Inventor after: Zhang Wei

Inventor after: Zhou Guanjun

Inventor after: Shi Lei

Inventor before: Zhang Wei

COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: ZHANG WEI TO: ZHANG WEI ZHOU GUANJUN SHI LEI

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120215

Termination date: 20150615

EXPY Termination of patent right or utility model