CN202906955U - Arcnet-485 gateway based on one-chip microcomputer - Google Patents
Arcnet-485 gateway based on one-chip microcomputer Download PDFInfo
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- CN202906955U CN202906955U CN 201220536877 CN201220536877U CN202906955U CN 202906955 U CN202906955 U CN 202906955U CN 201220536877 CN201220536877 CN 201220536877 CN 201220536877 U CN201220536877 U CN 201220536877U CN 202906955 U CN202906955 U CN 202906955U
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Abstract
An Arcnet-485 gateway based on a one-chip microcomputer comprises a main control circuit taking the one-chip microcomputer as a control core, an Arcnet interface circuit and an RS485 interface circuit. The main control circuit is connected with the Arcnet interface circuit and the RS 485 interface circuit separately, and is used to process the Arcnet bus data and the RS485 bus data sent by the Arcnet interface circuit and the RS485 interface circuit, thereby realizing the mutual communication of the Arcnet bus data and the RS485 bus data. The Arcnet-485 gateway based on the one-chip microcomputer of the utility model can verify and process the Arcnet bus protocol data very well, realizes the protocol data interchange between Arcnet and RS485, at the same time, has the characteristics of being strong in anti-interference capability and universality, being practical and convenient, etc., and can be widely used in the train bus industrial control fields, such as subway, light rail, railroad locomotive, etc., because of solving the interface problem between train buses.
Description
Technical field
The utility model relates to a kind of SCM Based Arcnet-485 gateway that is applied in subway, light rail train and the City Rail Transit System.
Background technology
Arcnet be 1977 by a kind of installation of Datapoint company exploitation Local Area Network technology widely, the Arcnet communication network mainly comes transfer bus information by the electric current loop of 4 ~ 20ma, it is disturbed that its advantage is that transmission course is difficult for, its employing token bus (token-bus) scheme is managed the shared circuit between the upper work station of LAN and other equipment, wherein, lan server empty information frame of transmission of continuous circulation on a bus always.When having equipment to send message, it just inserts one " token " and corresponding message in empty frame.After target device or lan server receive this message, just " token " is re-set as 0, so that this frame can be reused by other equipment.This scheme is highly effective, and particularly when network load was large, it used the chance of Internet resources for each equipment in the network provides equality.
Current, China's rail vehicle communication network bus mainly adopts the networks such as MVB, HDLC, CANOPEN, and this network-bus control mode more complicated is in the requirement that can not finely satisfy the train communication aspect the stability of controlling and the real-time, in addition, anti-interference is also relatively poor.Therefore, develop a kind of good stability, real-time is good, have simultaneously the very strong protocol conversion function gateway that is applied in subway, light rail train and the City Rail Transit System become essential.
Summary of the invention
The purpose of this utility model is to provide a kind of SCM Based Arcnet-485 gateway, it can realize the conversion of Arcnet and 485 two kinds of bus communication agreements, realize the interconnected of Arcnet network control system and 485 network control systems, have the Arcnet bus function of 485 networks from node of advocating peace.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is as follows:
A kind of SCM Based Arcnet-485 gateway comprises governor circuit, Arcnet interface circuit and RS485 interface circuit take single-chip microcomputer as control core; Described governor circuit is connected with the described RS485 interface circuit of described Arcnet interface circuit respectively, for the treatment of the Arcnet bus and the RS485 bus data that transmit by described Arcnet interface circuit and described RS485 interface circuit, realize the mutual communication of Arcnet bus and RS485 bus data.
Described governor circuit comprises the peripheral circuit that single-chip microcomputer and described single-chip microcomputer connect: power interface circuit, clock circuit, electric source monitoring circuit, reset circuit and JTAG download circuit.
Described Arcnet interface circuit includes the electric current loop of 4 ~ 20ma.
Described electric current loop is current-voltage converter.
The utility model can be crossed checking treatment with Arcnet bus protocol data communication device well, realize that the protocol data between Arcnet and the RS485 exchanges, have simultaneously the characteristics such as antijamming capability is strong, practical and convenient, highly versatile, owing to solved train bus-line interface problem, have simultaneously Arcnet and RS485 communication function, can realize very easily the protocol conversion between train bus-line Arcnet network and the RS485 communication network commonly used, be adapted at promoting in the railway systems.
Description of drawings
The structural representation of SCM Based Arcnet-485 gateways that Fig. 1 provides for the utility model embodiment.
The structural representation of the governor circuit that Fig. 2 provides for the utility model embodiment.
The network topological diagram of SCM Based Arcnet-485 gateways that Fig. 3 provides for the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Referring to shown in Figure 1, a kind of SCM Based Arcnet-485 gateway comprises governor circuit, Arcnet interface circuit and RS485 interface circuit take single-chip microcomputer as control core; Described governor circuit is connected with the RS485 interface circuit with the Arcnet interface circuit respectively, for the treatment of the Arcnet bus and the RS485 bus data that transmit by described Arcnet interface circuit and described RS485 interface circuit, realize the mutual communication of Arcnet bus and RS485 bus data.
With reference to shown in Figure 2, described governor circuit comprises that take single-chip microcomputer as control core, the peripheral circuit of described single-chip microcomputer comprises: power interface circuit, clock circuit, electric source monitoring circuit, reset circuit, JTAG download circuit and Arcnet interface circuit and RS485 interface circuit; Described governor circuit also includes the cpu power management circuit simultaneously, adopts power management chip MC33164D-5.
Described power interface circuit adopts power supply chip ASM1117-3.3, supply power voltage is processed become needed voltage; Described clock circuit adopts the 22.1184M crystal oscillator as clock source; Described power sense circuit adopts detection chip MC33164D-5.Described single-chip microcomputer model is 51 series monolithic C8051F040 of Cygnal company, this family device is fully-integrated mixed signal SOC (system on a chip) type MCU, have 64 digital I/O pins or 32 digital I/O pins, Embedded a CAN2.0B controller.
Described Arcnet interface circuit is a network interface for external connection, and mainly the electric current loop by 4 ~ 20ma consists of; Described 4 ~ 20ma electric current loop mainly is made of the current-voltage converter chip, and its chip is HCPL-4100 and TLP112.Described RS485 interface circuit is made of RS485 protocol controller chip, and this protocol controller chip adopts the MAX485 chip.
Referring to shown in Figure 3, described governor circuit (by described single-chip microcomputer) is mainly used in the Arcnet bus data that receives by described Arcnet interface circuit is processed and verification, verification by the time send by described RS485 interface circuit with the communications protocol of appointment again; After also can the RS485 bus data being processed by described RS485 interface circuit simultaneously, be sent to the Arcnet bus by described Arcnet interface circuit.
The utility model can be crossed checking treatment with Arcnet bus protocol data communication device well, realize that the protocol data between Arcnet and the RS485 exchanges, it is strong to have simultaneously antijamming capability, practical and convenient, the characteristics such as highly versatile, owing to solved train bus-line interface problem, be applicable to train bus-line, have simultaneously Arcnet and RS485 communication function, can realize very easily the protocol conversion between train bus-line Arcnet network and the RS485 communication network commonly used, be widely used in subway, the industrial control field of the train bus-line such as light rail and railway locomotive is adapted at promoting in the railway systems.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. a SCM Based Arcnet-485 gateway is characterized in that, comprises governor circuit, Arcnet interface circuit and RS485 interface circuit take single-chip microcomputer as control core; Described governor circuit respectively with described Arcnet interface circuit be connected the RS485 interface circuit and be connected, for the treatment of the Arcnet bus and the RS485 bus data that transmit by described Arcnet interface circuit and described RS485 interface circuit, realize the mutual communication of Arcnet bus and RS485 bus data.
2. SCM Based Arcnet-485 gateway according to claim 1, it is characterized in that described governor circuit comprises the peripheral circuit that single-chip microcomputer and described single-chip microcomputer connect: power interface circuit, clock circuit, electric source monitoring circuit, reset circuit and JTAG download circuit.
3. SCM Based Arcnet-485 gateway according to claim 1 and 2 is characterized in that described Arcnet interface circuit includes the electric current loop of 4 ~ 20ma.
4. SCM Based Arcnet-485 gateway according to claim 3 is characterized in that, described electric current loop is current-voltage converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220536877 CN202906955U (en) | 2012-10-19 | 2012-10-19 | Arcnet-485 gateway based on one-chip microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220536877 CN202906955U (en) | 2012-10-19 | 2012-10-19 | Arcnet-485 gateway based on one-chip microcomputer |
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| Publication Number | Publication Date |
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| CN202906955U true CN202906955U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220536877 Expired - Fee Related CN202906955U (en) | 2012-10-19 | 2012-10-19 | Arcnet-485 gateway based on one-chip microcomputer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395478A (en) * | 2017-08-23 | 2017-11-24 | 上海兰宝传感科技股份有限公司 | A kind of network control system and network communication module for high speed cigarette packaging facilities |
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2012
- 2012-10-19 CN CN 201220536877 patent/CN202906955U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395478A (en) * | 2017-08-23 | 2017-11-24 | 上海兰宝传感科技股份有限公司 | A kind of network control system and network communication module for high speed cigarette packaging facilities |
| CN107395478B (en) * | 2017-08-23 | 2022-08-05 | 上海兰宝传感科技股份有限公司 | Network control system and network communication module for high-speed cigarette packaging equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20181019 |