CN101718985A - EPA bus and Profibus-DP bus conversion adapter - Google Patents
EPA bus and Profibus-DP bus conversion adapter Download PDFInfo
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- CN101718985A CN101718985A CN200910228190A CN200910228190A CN101718985A CN 101718985 A CN101718985 A CN 101718985A CN 200910228190 A CN200910228190 A CN 200910228190A CN 200910228190 A CN200910228190 A CN 200910228190A CN 101718985 A CN101718985 A CN 101718985A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention relates to an EPA bus and Profibus-DP bus conversion adapter. A main circuit module mainly comprises an ARM chip AT91SAM7x256, a network chip DP83848I, a network transformer YL18-2050S, a standard JTAG circuit and a peripheral circuit and obtains a bus 24V power supply by an industrial exchanger. The EPA bus and Profibus-DP bus conversion adapter has the function of converting an EPA signal and a DP signal, is used for mounting DP equipment on the EPA bus to extend the functions of the EPA bus, is connected with the DP equipment to convert a DP message into an EPA message and can successfully monitor and configure the DP equipment in EPA configuration software, thereby realizing the coexistence of the DP equipment and the EPA equipment in the same network and realizing the mutual operation and the mutual access of the DP equipment and the EPA equipment.
Description
Technical field
The present invention relates to the module of mutual conversion between a kind of industrial process control instrument different bus, particularly a kind of EPA bus and Profibus-DP bus conversion adapter.
Background technology
Exist multiple bus standard in the industrial automation field at present, these bus standards are mostly by esbablished corporation customization and promotion and implementation in the automatic field, owing to reason such as interests and technical know-how separately, caused communication difficulties between various buses, be difficult to transparent exchanging visit between different bus, can't realize visit and interoperability mutually between the bus apparatus, in industrial process control system during device upgrade, can have the incompatible problem that causes used equipment to eliminate between tangible existing equipment and the new equipment, system reform cost also improves thereupon greatly.
Industrial Ethernet becomes new developing direction, have and outstanding feature such as be widely used, with low cost, technical resource is abundant, reliability is high, transmission speed is fast, the EPA bus standard is exactly a kind of Industrial Ethernet technology that has wide application prospect at present and have China's independent intellectual property right, and this makes other buses and the mutual communication of EPA bus become the focus of present research.
Summary of the invention
The inconvenience that coexists and bring in view of present multiple bus standard to industrial automation system design, the problem that the prior art that the objective of the invention is to solve exists, design a kind of brand-new bus conversion adapter, make present widely used Profibus-DP bus signals convert the EPA bus signals to, realize that DP equipment and EPA coexistence are in same system.
The present invention realizes by such technical scheme: EPA bus and Profibus-DP bus conversion adapter comprise the main circuit module, the main circuit module mainly by a built-in MAC layer of atmel corp and network controller ARM chip AT91SAM7x256, network chip DP83848I, network transformer YL18-2050S, standard jtag circuit and the peripheral circuit of National Semiconductor company constitute; It is characterized in that: the main circuit module obtains bus 24V power supply by industrial switch, the 24V power supply provides input voltage for power module WRB2405, be converted to the 5V output voltage by power module WRB2405 then, be converted to 3.3V output through power module LM1117-3.3 again; With 3.3V voltage is the operating voltage of main circuit module; To send ARM controller chip AT91SAM7x256 from the signal of DP equipment to by RS485 chip ADM2486; ARM controller chip AT91SAM7x256 is connected with the standard jtag circuit; Network chip DP83848I is connected realization communication by the MII interface with AT91SAM7x256; Network transformer YL18-2050S is connected with network chip DP83848I, RJ45 network interface respectively;
EPA bus and Profibus-DP bus conversion adapter have the EPA signal of realization and DP function switching signal, are used for the DP hanging equipment is loaded in the EPA bus, reach the effect of expansion EPA bus functionality.
The EPA bus links to each other, directly is connected industrial switch by Ethernet interface with DP equipment by the DP special joint with the Profibus-DP bus conversion adapter, realize networking with other EPA equipment in this network segment, realize DP equipment and EPA coexistence under the EPA bus, and carry out interactive operation.
Equipment with Profibus-DP bus functionality links to each other with DP special purpose interface on the Profibus-DP bus conversion adapter by DP bus and EPA bus, and the DP signal is sent on this conversion adapter main circuit module.The main circuit module is converted into the EPA protocol massages through the analysis to the DP protocol massages, and by the network interface RJ45 on the main circuit module integrated circuit board, the EPA message is connected directly on the industrial switch by Ethernet, finally realizes the conversion of DP to EPA.The power supply of main circuit module is adopted bus-powered, is provided+24V by RJ45 interface 4,5 pin of industrial switch, and 7,8 pin provide GND, provide power supply by netting twine for the main circuit module.
The prefabricated software systems of ARM controller chip AT91SAM7x256 are transplanted embedded OS uC/OS-II and built-in network ICP/IP protocol, and add the EPA layer on this basis, realize the agreement of EPA, and add the code of Profibus-DP protocol conversion in application layer.Software flow is as follows:
The invention has the beneficial effects as follows: with Profibus-DP equipment EPA bus with can realize of the conversion of DP message after the Profibus-DP bus conversion adapter links to each other to the EPA message, this DP equipment of monitoring that can be successful in the EPA configuration software and configuration, realize DP equipment and EPA coexistence in consolidated network, and realize that interoperability, exchanging visit between them ask.
Description of drawings
Fig. 1 is a circuit structure block diagram of the present invention, and as Figure of abstract;
Fig. 2 is ARM controller chip of the present invention and peripheral circuit thereof;
Fig. 3 is the network chip and the peripheral circuit thereof of integrated PHY layer of the present invention;
Fig. 4 is a software flow pattern of the present invention.
Embodiment
Clearerly understand the present invention, describe the present invention in conjunction with the accompanying drawings and embodiments in detail:
As shown in Figures 1 to 3, EPA bus and Profibus-DP bus conversion adapter main circuit module mainly are made of the network chip DP83848I that is integrated with the ARM controller chip AT91SAM7x256 of MAC layer and network controller, integrated PHY layer, network transformer YL18-2050S, standard jtag circuit, RS232 interface chip MAX3232, RS485 interface chip ADM2486, RJ45 network interface and peripheral circuit;
The operating voltage of main circuit module is 3.3V, and ARM controller chip VDDIO end input voltage is 3.3V; The operating voltage of ARM kernel is 1.8V, and 1.8V voltage is given the kernel power supply of self by the VDDOUT output of this chip, and the frequency that the crystal oscillator of CPU adopts is 18.432MHz; The standard jtag circuit is realized artificial debugging and program download by connecting ARM controller chip AT91SAM7x256; ARM controller chip CPU realizes communicating by letter by the MII interface with network chip DP83848I; By the signal of RS485 chip ADM2486 transmission from the DP joint; The ARM controller is connected with RS232 chip MAX3232 as host computer debugging interface in early stage; The network chip DP83848I of integrated PHY layer, its external crystal oscillator is 25MHz; Network transformer YL18-2050S is connected with network chip DP83848I, the RJ45 network interface of integrated PHY layer respectively; The main circuit module links to each other with DP equipment by the DP special joint; The main circuit module directly connects industrial switch by Ethernet interface;
Fig. 2 is the CPU part of EPA bus and Profibus-DP bus conversion adapter circuit structure block diagram, adopts AT91SAM7x256, and this is the ARM chip of a MAC of being integrated with layer and network controller.The operating voltage of entire chip is 3.3V, and the operating voltage of ARM kernel is 1.8V, and 1.8V voltage is given the kernel power supply of self by the VDDOUT output of this chip, and all the other IO parts and peripheral controls are 3.3V power supplies.Owing to adopting bus 24V power supply, so need two power modules, be respectively WRB2405 and LM1117-3.3, the former is used for 24V changes 5V, and the latter is used for 5V commentaries on classics 3.3V and powers to CPU then.The crystal oscillator of CPU adopts 18.432MHz, through producing the frequency of 48MHz as the ARM dominant frequency after the PLL controller frequency division frequency multiplication.Artificial debugging partly adopts the jtag circuit of standard.The developer debugs integrated circuit board for convenience simultaneously, is equipped with a RS232 interface by MAX3232, helps early development.AT91SAM7x256 and network chip DP83848I realize that by the MII interface interface number of MII is altogether 15 pins.ADM2486 is the RS485 chip, and its A, B correspondence the signal of DP joint.
As shown in Figure 3, the network portion of EPA bus and Profibus-DP bus conversion adapter, wherein DP83848I is the network chip of integrated PHY layer, and its external crystal oscillator is 25MHz, and it is connected with AT91SAM7x256 by the MII interface.YL18-2050S is a network transformer, and it is connected with DP83848I with the RJ45 network interface respectively.4,5 pin of the network interface of RJ45 obtain the 24V power supply by industrial switch, and 7,8 pin also link to each other with industrial switch and obtain GND, realize bus-powered.
Be illustrated in figure 4 as the software flow of EPA bus and Profibus-DP bus conversion adapter main circuit module, the whole software system transplantation has embedded OS uC/OS-II and built-in network ICP/IP protocol, and add the EPA layer on this basis, realize the agreement of EPA, and add the code of Profibus-DP protocol conversion in application layer.Also to realize the DP function on the software, comprise DP address lookup, diagnosis, parametrization, configuration etc., and be sent to network after converting the DP message to the EPA message through message analysis.
After this module powers on, program is at first carried out the initialization of whole hardware system, enable ARM and network chip, clock and peripheral controllers are set, initialization embedded OS uC/OS-II and embedded TCP/IP procotol then, and detect the communication interface of DP equipment and whether DP equipment is ready, correlation parameter that DP equipment is set.Finish above work back operation system creation task and be used to handle communication between DP bus and the EPA bus.When receiving the DP device data, extract the data division in the DP message, send in the EPA network behind the interpolation EPA header.When the EPA data send, extract the data division in the EPA message, send in the DP equipment behind the interpolation DP header.
According to the above description, can realize the solution of the present invention in conjunction with art technology.
Claims (2)
1.EPA bus and Profibus-DP bus conversion adapter, comprise the main circuit module, the main circuit module mainly is made of ARM controller chip AT91SAM7x256, network chip DP83848I, network transformer YL18-2050S, standard jtag circuit and peripheral circuit; It is characterized in that: the main circuit module obtains bus 24V power supply by the Industrial Ethernet switch, the 24V power supply provides input voltage for power module WRB2405, be converted to the 5V output voltage by WRB2405 then, be converted to 3.3V output through power module LM1117-3.3 again; 3.3V voltage is the operating voltage of main circuit module; To send ARM controller chip AT91SAM7x256 from the signal of DP equipment to by RS485 chip ADM2486; The standard jtag circuit is connected as the artificial debugging interface with ARM chip AT91SAM7x256; Network chip DP83848I is connected realization communication by the MII interface with ARM chip AT91SAM7x256; Network transformer YL18-2050S is connected with network chip DP83848I, RJ45 network interface respectively.
2. EPA bus and Profibus-DP bus conversion adapter according to claim 1, it is characterized in that: the main circuit modular power source is to obtain+the 24V power supply by RJ45 interface 4,5 pin of RJ45 netting twine from industrial switch, obtains GND from 7,8 pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102281901A CN101718985B (en) | 2009-11-12 | 2009-11-12 | EPA bus and Profibus-DP bus conversion adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102281901A CN101718985B (en) | 2009-11-12 | 2009-11-12 | EPA bus and Profibus-DP bus conversion adapter |
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| Publication Number | Publication Date |
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| CN101718985A true CN101718985A (en) | 2010-06-02 |
| CN101718985B CN101718985B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102281901A Expired - Fee Related CN101718985B (en) | 2009-11-12 | 2009-11-12 | EPA bus and Profibus-DP bus conversion adapter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859138A (en) * | 2010-06-04 | 2010-10-13 | 中环天仪股份有限公司 | EPA bus and LonWorks bus conversion adapter |
| CN102316096A (en) * | 2011-07-22 | 2012-01-11 | 中环天仪股份有限公司 | Wireless Zigbee and industrial Ethernet bus protocol conversion adaptation module |
| CN102681967A (en) * | 2012-05-16 | 2012-09-19 | 浙江中控研究院有限公司 | Data transmission device between EPA (Ethernet for plant automation) and PCI (peripheral component interconnect) buses |
| CN103401772A (en) * | 2013-07-30 | 2013-11-20 | 北京华电天仁电力控制技术有限公司 | Device for switching from ETHERNET/IP (Internet Protocol) industrial Ethernet to Profibus-DP |
| CN103560938A (en) * | 2013-11-14 | 2014-02-05 | 中环天仪股份有限公司 | Industrial Ethernet and HART bus protocol conversion board card |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5896508A (en) * | 1995-02-23 | 1999-04-20 | Advanced Micro Devices, Inc. | Hub-network adapter device for a file server personal computer |
| CN101262473B (en) * | 2007-12-28 | 2011-01-26 | 上海自动化仪表股份有限公司 | EPA industrial Ethernet and HART field bus interconnection method |
| CN101425948B (en) * | 2008-10-23 | 2011-10-26 | 上海大学 | Industrial wireless network access industrial Ethernet, multi-protocol gateway of field bus and protocol conversion method |
-
2009
- 2009-11-12 CN CN2009102281901A patent/CN101718985B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101859138A (en) * | 2010-06-04 | 2010-10-13 | 中环天仪股份有限公司 | EPA bus and LonWorks bus conversion adapter |
| CN102316096A (en) * | 2011-07-22 | 2012-01-11 | 中环天仪股份有限公司 | Wireless Zigbee and industrial Ethernet bus protocol conversion adaptation module |
| CN102681967A (en) * | 2012-05-16 | 2012-09-19 | 浙江中控研究院有限公司 | Data transmission device between EPA (Ethernet for plant automation) and PCI (peripheral component interconnect) buses |
| CN102681967B (en) * | 2012-05-16 | 2016-01-06 | 浙江中控研究院有限公司 | Data transmission device between EPA and pci bus |
| CN103401772A (en) * | 2013-07-30 | 2013-11-20 | 北京华电天仁电力控制技术有限公司 | Device for switching from ETHERNET/IP (Internet Protocol) industrial Ethernet to Profibus-DP |
| CN103401772B (en) * | 2013-07-30 | 2016-08-10 | 北京华电天仁电力控制技术有限公司 | A kind of ETHERNET/IP EPA is to the conversion equipment of Profibus-DP fieldbus |
| CN103560938A (en) * | 2013-11-14 | 2014-02-05 | 中环天仪股份有限公司 | Industrial Ethernet and HART bus protocol conversion board card |
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| CN101718985B (en) | 2011-07-20 |
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Granted publication date: 20110720 |