CN102271100B - Gateway device between EtherCAT industrial Ethernet and wireless Zigbee and protocol conversion method of gateway device - Google Patents
Gateway device between EtherCAT industrial Ethernet and wireless Zigbee and protocol conversion method of gateway device Download PDFInfo
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- CN102271100B CN102271100B CN201110260123.5A CN201110260123A CN102271100B CN 102271100 B CN102271100 B CN 102271100B CN 201110260123 A CN201110260123 A CN 201110260123A CN 102271100 B CN102271100 B CN 102271100B
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Abstract
The invention discloses a gateway device between EtherCAT industrial Ethernet and wireless Zigbee and a protocol conversion method of a gateway device. The gateway device comprises a Zigbee wireless module, an EtherCAT module and a central processing module. The gateway device is characterized in that the Zigbee wireless module is in charge of receiving various sensing data and sending various automatic control commands to an instrument and a meter; the central processing module is in charge of EtherCAT drive, data and control interaction processing with the Zigbee wireless module and the EtherCAT module and the realization of an application program; and the EtherCAT module realizes a slave station function and realizes the interaction processing of main station data and control in a distributing type control unit. The invention can realize the combination of a real-time wired high-speed Ethernet EtherCAT and Zigbee wireless sensing technology, bring great convenience to the arrangement and planning of a transmission channel and reduce puzzle and cost brought by great cable construction.
Description
Technical field
The present invention relates to a kind of devices and methods therefor of networking technology area, gateway apparatus and method for converting protocol thereof between especially a kind of EtherCat Industrial Ethernet and wireless Zigbee, belong to communication technical field.
Background technology
Real-time industrial ethernet EtherCAT technology is the general ultrahigh speed Ethernet field bus technique that a kind of developed recently gets up, for substituting PROFIBUS, CANopen, MODBUS industrial bus technology.It is also that field instrument and control unit are interconnected by bus that so-called industrial field bus makes data acquisition unit, realizes data acquisition, analyzes and automatically controls.
EtherCAT agreement is according to the Ethernet system of the expansion of IEEE802.3 standard, makes to have in transfer of data predictability regularly and the feature such as high-precise synchronization.The media access control mode of traditional ethernet is a kind of media access control mode of uncertainty with the Carrier Sense Multiple Access mechanism of collision detection, can not meet the requirement of real-time of industry spot, therefore EtherCAT can replace original Ethernet stelliform connection topology configuration, can set up easily linear topology, as main website, standard Ethernet controller just can meet, and does not need specific hardware device.
Wireless sensor network is as the sensing layer technology of technology of Internet of things, in its development, play vital effect, because of the distinctive low-power consumption of ZigBee technology, low complex degree and advantage cheaply, the first technology that it becomes radio sensing network communication undoubtedly, is successfully applied among a plurality of fields such as industry automatic control, intelligent grid.
Zigbee network is comprised of three kinds of network nodes: network coordinator, routing node, terminal node.Network coordinator comprises all internet messages, and memory capacity is large, computing capability is the strongest, sends networked beacons, sets up a network, managing network node, storage networking nodal information, finds a pair of internodal route messages, receipt message incessantly; Routing node is the relaying in network, each node of interconnection network, coverage and the network size of extension and extended network.Terminal node is can only directly send out message to network coordinator and routing node, and the data message of all collections all passes through this node and enters Zigbee communication network.
Radio sensing network based on ZigBee technology is combined with net with EtherCAT industry, the common key bus network that forms each control field Instrumental instrument or electric equipment and distributed control unit, along with popularizing of real-time EtherCAT industrial field bus technology and ZigBee technology, the gateway apparatus of both protocol conversions is imperative.
Summary of the invention
The object of the invention is to solve the disappearance of prior art in EtherCAT wired bus network and Zigbee wireless network compatibility, the protocol conversion device of real-time industrial ethernet EtherCAT and radio sensing network ZigBee technology agreement is provided.By increasing this gateway device, realize interconnecting between EtherCAT cable network and Zigbee wireless network, wherein main website is on distributed control unit, and slave station is positioned at gateway apparatus end.
The present invention realizes by the following technical solutions:
Gateway apparatus between a kind of EtherCAT Industrial Ethernet and wireless Zigbee, comprise: Zigbee wireless module, EtherCAT module and central processing module, wherein Zigbee wireless module is mainly responsible for receiving various sensing receipts and sending various automatic control commands to instrument and meter, central processing module is mainly responsible for EtherCAT and is driven, data and control interaction process with Zigbee wireless module and EtherCAT module, the realization of application program, EtherCAT module realize slave station function and realize with distributed control unit in the interaction process of main website data and control.
Gateway apparatus between aforesaid EtherCAT Industrial Ethernet and wireless Zigbee, it is characterized in that: described Zigbee wireless module comprises Zigbee wireless chip and radio-frequency antenna, on Zigbee wireless chip, realize processing and the encapsulation of Zigbee wireless technology standard protocol stack, wireless protocols Frame.
Gateway apparatus between aforesaid EtherCAT Industrial Ethernet and wireless Zigbee, is characterized in that: described Zigbee wireless module also comprises rf power amplifier circuit, and described rf power amplifier circuit is connected with Zigbee wireless chip.Whether rf power amplifier circuit, for can reduce part, according to the required distance of practical application, is reduced really, and this power amplification circuit mainly carries out linearity to signal and amplifies, and improves signal and sends to the signal strength signal intensity of eating dishes without rice or wine; Radio-frequency antenna increases signal gain, realizes the comprehensive or directive sending of signal.
Described EtherCAT module, comprises EtherCAT technology chip, ethernet transceiver chip, network transformer and network interface, wherein: EtherCAT technology chip is realized slave station function, follows EtherCAT standard agreement, and is responsible for and main website communicates; Ethernet transceiver chip is responsible for realizing the transmitting-receiving control of physical layer Ethernet message, and the interface to media access control layer is provided simultaneously; Network transformer, for signal level coupling, can strengthen signal, improves transmission range, makes chip and external isolation simultaneously, strengthens antijamming capability; Network interface can be general RJ45 interface, can be also the fiber optic Ethernet interface by opto-electronic conversion.
Described central processing module, comprise that CPU, memory ram, read-only memory ROM, Flash and peripheral circuit form, in this module, can move various operating system, as linux, vxworks etc., in this module, realize EtherCAT module drive, and be responsible for the data interaction processing of Zigbee wireless module and EtherCAT module simultaneously.
The EtherCAT Industrial Ethernet the present invention relates to and the method for converting protocol between wireless Zigbee comprise the following steps:
1) EtherCAT module reads the data from main website as slave station, and carries out data decode, thereby obtains mailing to instrument and meter under this gateway or the data message of electric equipment;
2) central processing module is processed data message and is unpacked or organize the processing such as bag, and the data message after processing is sent to Zigbee wireless module;
3) Zigbee wireless module is packaged into Zigbee wireless data frame by data message, then by eating dishes without rice or wine, sends to the Zigbee wireless device on instrument and meter or electric equipment;
4) on instrument and meter or electric equipment, sending the process of image data is the inverse process of said process, that is: by instrument and meter image data, and by the data after gathering, give Zigbee wireless device and send on protocol conversion apparatus by eating dishes without rice or wine, Zigbee wireless module decoding in protocol conversion apparatus is from the Zigbee packet of eating dishes without rice or wine, parse the data of collection, these data are given central processing module and are carried out buffer memory, group bag waits processing, and by the Packet Generation after processing to EtherCAT module, by EtherCAT module, carry out the encapsulation of EtherCAT message, and message is sent into industry ethernet send to main website.
Conspicuousness progress and the feature of technical solution of the present invention are mainly reflected in: by the gateway apparatus between EtherCAT Industrial Ethernet and wireless Zigbee, can conveniently realize the combination of real-time wired Fast Ethernet EtherCAT and Zigbee wireless sensor technology, in the deployment of transmission channel and planning, be with great facility, also reduced puzzlement and cost that a large amount of cable constructions bring.What this gateway apparatus was particularly suitable for distributed control unit and instrument and meter or electric equipment in power plant's dcs docks control, industrial automatic control etc.
Accompanying drawing explanation
Fig. 1 is the bus network that EtherCAT Industrial Ethernet of the present invention is combined with Zigbee wireless technology;
Fig. 2 is gateway apparatus modular structure schematic diagram of the present invention;
Fig. 3 is gateway apparatus circuit theory schematic diagram of the present invention;
Fig. 4 is EtherCAT of the present invention and Zigbee protocol data conversion schematic diagram;
Fig. 5 is that instrument and meter image data of the present invention is via sending supervisory control system sequential flowchart on gateway.
Embodiment
Gateway apparatus and method thereof between EtherCAT Industrial Ethernet and wireless Zigbee, relate to Zigbee wireless module, EtherCAT module and central processing module, wherein Zigbee wireless module is mainly responsible for receiving various sensing receipts and sending various automatic control commands to instrument and meter, central processing module is mainly responsible for EtherCAT and is driven, data and control interaction process with Zigbee wireless module and EtherCAT module, the realization of application program, EtherCAT module realize slave station function and realize with distributed control unit in the interaction process of main website data and control.
Described Zigbee wireless module, adopt Jennic5148 chip to realize Zigbee protocol stack, according to the demand of transmission range, can add or remove power amplification circuit, antenna can adopt the sucker antenna of 2.4GHz, make gateway encapsulation and screen cabinet put more flexible.
Described central processing module, adopts ARM Cortex A8 kernel CPU, and on this CPU, reduces linux operating system, realizes the processing of application program and each protocol data and control command.
Described EtherCAT module, adopt ET1100 chip to realize EtherCAT slave station function, KS8721 chip is realized the transmitting-receiving of ethernet physical layer data, and network transformer selects H1102 chip to isolate with signal Recovery processing etc., and network interface is selected RJ45 connector.
Realize as follows uploading of instrument and meter or electric equipment real-time status data:
1) distributed control unit mails to slave station by configuration, and slave station is according to configuration initialization EtherCAT protocol handling program;
2) instrument and meter or electric equipment, by the data that gather, as switching value, analog quantity and real-time status data, are wirelessly sent to gateway apparatus by Zigbee;
3) gateway apparatus receives from the data of eating dishes without rice or wine by Zigbee wireless module, and after the data of eating dishes without rice or wine are carried out to buffer memory, processing and protocol data conversion, data are issued to EtherCAT module, the message position data inserting message being distributed by EtherCAT module;
4) the distributed control unit of main website is received after Ethernet message, data are uploaded to monitoring system platform in real time, and realize the automatic control operation of oneself simultaneously, if need to implement the control to instrument and meter or electric equipment according to status data, issue control command;
5) monitoring system platform also carries out respective handling according to the data of sending on distributed control unit, if need to implement the control to instrument and meter or electric equipment according to status data, issues control command;
6) control command, via distributed control unit main website, sends to gateway slave station, the message position acquisition control command data of gateway slave station from distributing, and convert order data to the Zigbee data message of eating dishes without rice or wine and be handed down to instrument and meter or electric equipment;
7) instrument and meter or electric equipment carry out corresponding control operation according to the control command issuing.
In sum, adopt after the present invention, EtherCAT Industrial Ethernet and wireless ZigBee technology are combined, give the transmission channel flexible arrangement of control automatically and various transmission data, the real-time Transmission of data provides very powerful guarantee, by the gateway apparatus between EtherCAT Industrial Ethernet and wireless Zigbee, the flexible deployment of transmission channel greatly reduces the construction volume of wire cable, also made up wired and deficiency wireless technology, be specially adapted to industrial automatic control, in-service monitoring and the control system of power plant's automation control and various a large amount of instrument and meters.As can be seen here, the present invention has conspicuousness progress and optimizes the feature improving, and its application prospect is boundless.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, any simple modification, equivalent variations and decoration that every foundation technical spirit of the present invention is done above embodiment, all still belong in the scope of technical solution of the present invention.
Claims (1)
1. the method for converting protocol between an EtherCAT Industrial Ethernet and wireless Zigbee, utilize the gateway apparatus between EtherCAT Industrial Ethernet and wireless Zigbee to change, gateway apparatus between described EtherCAT Industrial Ethernet and wireless Zigbee, comprise Zigbee wireless module, EtherCAT module and central processing module, it is characterized in that: described Zigbee wireless module is responsible for receiving various sensing receipts and is sent various automatic control commands to instrument and meter, central processing module is responsible for EtherCAT and is driven, data and control interaction process with Zigbee wireless module and EtherCAT module, the realization of application program, EtherCAT module realize slave station function and realize with distributed control unit in the interaction process of main website data and control,
Described Zigbee wireless module comprises Zigbee wireless chip and radio-frequency antenna, Zigbee wireless chip is Jennic chip, on Zigbee wireless chip, realize processing and the encapsulation of Zigbee wireless technology standard protocol stack, wireless protocols Frame, described Zigbee wireless module also comprises rf power amplifier circuit, and described rf power amplifier circuit is connected with Zigbee wireless chip;
Described EtherCAT module comprises EtherCAT technology chip, ethernet transceiver chip, network transformer and network interface, described EtherCAT technology chip adopts ET1100 chip, EtherCAT technology chip is realized slave station function, follow EtherCAT standard agreement, and be responsible for and main website communicates; Ethernet transceiver chip adopts KS8721 chip, and ethernet transceiver chip is responsible for realizing the transmitting-receiving control of physical layer Ethernet message, and the interface to media access control layer is provided simultaneously; Network transformer is for signal level coupling; Network interface is general RJ45 interface or passes through the fiber optic Ethernet interface of opto-electronic conversion;
Described central processing module comprises CPU, memory ram, read-only memory ROM, Flash and peripheral circuit, CPU is ARM cortex A8 kernel CPU, in central processing module, realize EtherCAT module drive, and be responsible for the data interaction processing of Zigbee wireless module and EtherCAT module simultaneously;
Comprise the following steps:
1) EtherCAT module reads the data from main website as slave station, and carries out data decode, thereby obtains mailing to instrument and meter under the gateway between EtherCAT Industrial Ethernet and wireless Zigbee or the data message of electric equipment;
2) central processing module is processed data message and is unpacked or organize bag and process, and the data message after processing is sent to Zigbee wireless module;
3) Zigbee wireless module is packaged into Zigbee wireless data frame by data message, then by eating dishes without rice or wine, sends to the Zigbee wireless device on instrument and meter or electric equipment;
4) on instrument and meter or electric equipment, sending the process of image data is the inverse process of said process, that is: by instrument and meter image data, and by the data after gathering, give Zigbee wireless device and send on protocol conversion apparatus by eating dishes without rice or wine, Zigbee wireless module decoding in protocol conversion apparatus is from the Zigbee packet of eating dishes without rice or wine, parse the data of collection, these data are given central processing module and are carried out buffer memory, group bag is processed, and by the Packet Generation after processing to EtherCAT module, by EtherCAT module, carry out the encapsulation of EtherCAT message, and message is sent into industry ethernet send to main website.
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