CN202145647U - Protocol converter - Google Patents
Protocol converter Download PDFInfo
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- 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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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
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.
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
ID=45581569
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)
| 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 |
-
2011
- 2011-06-15 CN CN201120201967U patent/CN202145647U/en not_active Expired - Fee Related
Cited By (3)
| 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 |