CN202871076U

CN202871076U - Industrial field equipment data collector for multiple industrial buses

Info

Publication number: CN202871076U
Application number: CN 201220454691
Authority: CN
Inventors: 李逊; 黄林凯; 蒋永实
Original assignee: WUXI ZHONGKE SUHUI AUTOMATION TECHNOLOGY CO LTD
Current assignee: WUXI ZHONGKE SUHUI AUTOMATION TECHNOLOGY CO LTD
Priority date: 2012-09-08
Filing date: 2012-09-08
Publication date: 2013-04-10
Anticipated expiration: 2022-09-08

Abstract

The utility model relates to an industrial field equipment data collector for multiple industrial buses, and in particular relates to a protocol conversion and communication device among different industrial buses. The industrial field equipment data collector is characterized by comprising a central processing unit, a power supply module, a signal collecting module, a communication interface and a clock module, wherein the central processing unit is connected with the power supply module, the signal collecting module, the communication interface and the clock module respectively. The industrial field equipment data collector for the multiple industrial buses is suitable for not only large systems but also small-sized systems with simpleness in network architectures and low required cost, thus being wide in application range.

Description

A kind of industrial field device data acquisition unit of multiplex's industry bus

Technical field

The utility model relates to a kind of industrial automation equipment.Specifically, be protocol conversion and communicator between the different industrial bus.

Background technology

At present, along with increasing rapidly of network insertion market, the process data collection of industrial field device has very high requirement to factors such as real-time, anti-interference and environment in the existing market.China's 200610025002.1 patent specifications disclose a kind of process data acquisition method of industrial field device, and it disposes acquisition terminal, OPCServer, text and data point for the PLC equipment of supporting the OPC agreement in MuhiLink.For the data by the XCOM communication, the information such as configuration communicating terminal, text, passage.Call the .API read-write interface that MuhiLink or XCOM provide, write and read text.With the text that reads, according to message format, resolve text, text is resolved to single data point.At last data are stored in the historical data base according to the database structure that pre-defines, and the real time data after will resolving sends to real-time end for process, process in real time and analyze.The process data acquisition method more complicated of above-mentioned industrial field device, support equipment is many, and cost is higher, practical application and maintenance requirement are higher, so the large scale system of being only applicable to, be not suitable for some network architectures simple, require lower-cost mini-system, the scope of application is less.

The utility model content

Problem to be solved in the utility model provides a kind of industrial field device data acquisition unit of multiplex's industry bus.The industrial field device data acquisition unit of this multiplex (MUX) industry bus is not only applicable to large scale system, also be applicable to some network architectures simple, require lower-cost mini-system, the scope of application is wider.

For addressing the above problem, the utility model adopts following technical scheme:

The industrial field device data acquisition unit characteristics of multiplex's industry bus of the present utility model are to comprise central microprocessor, power module, signal acquisition module, communication interface and clock module, and central microprocessor is connected with power module, signal acquisition module, communication interface and clock module respectively.

Wherein, described central microprocessor is the S3C2440 microprocessor take ARM920T as core, and described communication interface comprises RS-485 communication interface, RS-232 communication interface, RJ45 communication interface, USB communication interface and CAN communication interface.

Take such scheme, have the following advantages:

Can be found out by such scheme, because the utility model comprises central microprocessor, power module, signal acquisition module, communication interface and clock module, central microprocessor is connected with power module, signal acquisition module, communication interface and clock module respectively.Compare with the process data acquisition method of industrial field device in the background technology, fairly simple, support equipment is few, the time cost low, practical application and maintenance requirement are not high, both be applicable to large scale system, can be used for again some network architectures simple, require lower-cost mini-system, the scope of application is wider.

Description of drawings

Fig. 1 is the industrial field device data acquisition unit synoptic diagram of multiplex's industry bus of the present utility model.

Embodiment

As shown in Figure 1, the industrial field device data acquisition unit of multiplex's industry bus of the present utility model comprises central microprocessor, power module, signal acquisition module, communication interface, clock module, and primary module is connected with power module, signal acquisition module, communication interface, clock module respectively.

Power module is connected with central microprocessor by power lead, for central microprocessor is powered.Clock module is connected with central microprocessor, for authenticity, validity, real-time, the availability of field data provides assurance; Signal acquisition module is connected with central microprocessor by the CAN bus, the various data of industry spot is gathered then the data that gather are sent to central microprocessor and process, and passes through various communication interfaces again and exports.

It is the S3C2440 microprocessor of core that described central microprocessor adopts ARM920T.Communication interface comprises RS-485 communication interface, RS-232 communication interface, RJ45 communication interface, USB communication interface, CAN communication interface.

Module+the VS pin connects the positive ends of input power, and the GND pin connects the negative polarity end of input power, the incorrect polarity of avoiding power supply to connect during connection.When a plurality of modules were connected to same power supply, all+VS pin was connected to power positive end, and the GND pin is connected to power supply negative terminal.The RS-485 connection is when connecting, and module DATA+ ends all on the network must be connected to same 485A signal wire, and all module DATA-ends must be connected to same 485B signal wire, otherwise can cause the communication abnormality of network.

The RS-485 communication interface of module is the bus interface of band isolation, when needing altogether, the 485GND of module is connected to going up isolator of RS-485 main frame.The RS-485 network is the bus type topological structure, reduces as far as possible a line length during wiring of suggestion networking.End at the backbone of RS-485 network need to connect terminal resistance.

The RS-485 connection can use twisted-pair feeder, Shielded Twisted Pair.If communication distance surpasses 1KM, should guarantee the sectional area of line greater than Φ 1.0mm2, concrete specification should be decided according to distance, and routine is suitably to strengthen with the lengthening of distance.The RS-485 network requirement is at two terminal installing terminal resistance of main line.

CPU is the real-time control core of whole system, it in Industrial Ethernet as the master controller of intelligent node.This paper selects the S3C2440 microprocessor take ARM920T as core.S3C2440 is the risc microcontroller of 16/32bit, and this processor provides the solution of low price, low-power consumption, high performance mini microcontroller for handheld device and general type application.S3C2440 has adopted the kernel of ARM920T, CMOS standard macroelement and the memory cell of 0.13um.Its low-power consumption, simple, gracefulness, and full Static Design is particularly suitable for the application to cost and power sensitive type.It has adopted new bus architecture Advanced Micro controller Bus Architecture (AMBA).ARM920T has realized MMU, AMBA BUS and Harvard speed buffering architecture.This structure has independently 16KB command cache and 16KB data cache.By providing outside the complete general-purpose system of a cover, S3C2440 reduces the total system cost and need not to dispose extra assembly.

The high reliability that the CAN bus has and good error detection capability and security, comfortableness, convenience, low public hazards, advantage cheaply.The CAN bus links to each other with physical bus with CANL by two output terminal CANH of CAN transceiver interface chip 82C250, and the state of CANH end can only be high level or suspended state, and the CANL end can only be low level or suspended state.The perfect communication protocol that CAN has can be realized by CAN controller chip and interface chip thereof.Maximum characteristics of CAN agreement are to have abolished traditional station address coding, and replace communicating data block are encoded.Adopt the advantage of this method can make the node number in the network unrestricted in theory, the identification code of data block can be comprised of 11 or 29 bits, therefore can define data blocks different more than 2 or 2, this mode by the data block coding, also can make different nodes receive simultaneously identical data, this point is very useful in dcs.Data segment, length mostly is 8 bytes most, can satisfy the General Requirements of control command, duty and test data in the common industrial circle.

The utility model can connect Ethernet by the RJ45 communication interface, thereby realizes that the data that gather are sent to the remote monitoring end to be got on the browser.Network external tapping by an isolating transformer and RJ45 communication interface when design network card chip circuit links to each other, and external host is connected with the RJ45 communication interface by the Ethernet netting twine, realizes exchanges data.

Usb bus is a kind of novel, quick, two-way, synchronous transmission, and data transmission bus that can hot plug, it has satisfied people to bus ease for use, extended capability by force and cheaply requirement, therefore, USB brings up to the high speed data transfer of 480 Mbps of today from the full speed of the low speed of 1.5Mbps and 12 Mbps in the transfer rate in PC peripheral hardware field.Its long transmission distance, transfer rate is high, and antijamming capability is strong, is easy to networking, and saves cost, has been acknowledged as one of the most promising fieldbus.The utility model provides the ICP/IP protocol stack, can directly add kernel and use.Therefore USB drives and directly adds kernel, realizes the conversion between agreement.

Claims

1. the industrial field device data acquisition unit of multiplex (MUX) industry bus, it is characterized in that comprising central microprocessor, power module, signal acquisition module, communication interface and clock module, central microprocessor is connected with power module, signal acquisition module, communication interface and clock module respectively.

2. the industrial field device data acquisition unit of multiplex's industry bus according to claim 1 is characterized in that described central microprocessor is the S3C2440 microprocessor take ARM920T as core.

3. the industrial field device data acquisition unit of multiplex's industry bus according to claim 1 is characterized in that described communication interface comprises RS-485 communication interface, RS-232 communication interface, RJ45 communication interface, USB communication interface and CAN communication interface.