CN101924733A - Industrial control network experimental platform based on filed buses and control method thereof - Google Patents
Industrial control network experimental platform based on filed buses and control method thereof Download PDFInfo
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- CN101924733A CN101924733A CN2009100528115A CN200910052811A CN101924733A CN 101924733 A CN101924733 A CN 101924733A CN 2009100528115 A CN2009100528115 A CN 2009100528115A CN 200910052811 A CN200910052811 A CN 200910052811A CN 101924733 A CN101924733 A CN 101924733A
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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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Abstract
The invention discloses an industrial control network experimental platform based on filed buses and a control method thereof, and the experimental platform comprises an experimental terminal, a remote control terminal and a communication module. The experimental terminal comprises a programmable controller which controls the field buses to transmit variable information; and the remote control terminal is used for remotely controlling the experimental terminal. The communication module comprises field bus communication units of at least two types and a field bus protocol conversion module; and the field bus protocol conversion module is arranged between the field bus communication units which are connected in series and is used for converting a data packet which can be transmitted by one bus communication unit to a data packet which can be transmitted by other bus communication units. Protocol conversion of various field buses can be realized by the field bus protocol conversion module, thus realizing data communication between two types of field buses; and information transmission among different field bus devices can be constructed in a laboratory, and students can get to know more kinds of field buses.
Description
Technical field
The invention belongs to the field bus technique field, relate to a kind of industrial control network experiment porch and control method thereof, relate in particular to a kind of industrial control network experiment porch and control method thereof based on multiple fieldbus.
Background technology
In Engineering colleges and universities, the fieldbus course has very strong practicality, has only by starting to set up industrial network, realizes the communication of data, can understand and grasp the integral frame of industrial control network.And all be to build at a certain bus in the industrial control network laboratory of each colleges and universities at present, have only with carrying out data communication between a kind of bus, consensus standard does not need conversion, and can only between the equipment of same brand, carry out message transmission, the student is grasped between the characteristics of multiple fieldbus and the different fieldbus how to interconnect.
As, existing a certain experimental system is by 16 B﹠amp; The 2003 Series PC C (programmable computer controller) of R company constitute, the student can use this controller and realize that the CAN bus is transmitted single argument, the CAN bus is transmitted argument table, and popular fieldbus PROFIBUS, Ethernet etc. can not be realized in the current industrial control field.
Summary of the invention
Technical problem to be solved by this invention is: a kind of industrial control network experiment porch based on multiple fieldbus is provided, can realizes multiple fieldbus mutual communication.
In addition, the present invention also provides the control method of above-mentioned industrial control network experiment porch based on multiple fieldbus.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of Fieldbus Based industrial control network experiment porch, it comprises experimental terminal, remote control terminal, communication module.Experimental terminal comprises Programmable Logic Controller, this controller control fieldbus transmission variables information; Remote control terminal is in order to the described experimental terminal of Long-distance Control; Communication module is in order to transmit the data between described experimental terminal and the remote control terminal.This communication module comprise at least two types, be series at the field bus communication unit between described experimental terminal and the remote control terminal: bus communication unit, primary scene, bus communication unit, the secondary scene; Communication module also comprises the field bus protocol modular converter, this field bus protocol modular converter is arranged between the field bus communication unit of described series connection, but but in order to a certain bus communication unit data packets for transmission is converted to other bus communication unit data packets for transmission.
As a preferred embodiment of the present invention, described communication module comprises at least two group field bus communication unit groups; Bus communication unit, primary scene group is arranged between described experimental terminal and the field bus protocol modular converter, and bus communication unit, secondary scene group is arranged between described remote control terminal and the field bus protocol modular converter; Each field bus communication unit group comprises field bus communication unit one or more, one or more types; Two groups of field bus communication unit groups connect by same or any a plurality of field bus protocol modular converter, but but realize a certain bus communication unit data packets for transmission is converted to other bus communication unit data packets for transmission.
As a preferred embodiment of the present invention, described communication module comprises two types field bus communication unit, connects by the field bus protocol modular converter between these two field bus communication unit.
As a preferred embodiment of the present invention, described communication module comprises the communication submodule of some parallel connections; Each communication submodule comprises the field bus communication unit between described experimental terminal of at least two types be series at and the remote control terminal, in order to transmit the data between described experimental terminal and the remote control terminal; Between the different field bus communication unit of described series connection, the field bus protocol modular converter is set.
As a preferred embodiment of the present invention, described communication module comprises two or more in CAN bus communication unit, PROFIBUS bus communication unit, the industry ethernet communication unit; But but described field bus protocol modular converter is converted to other bus communication unit data packets for transmission with above-mentioned arbitrary bus communication unit data packets for transmission.
As a preferred embodiment of the present invention, the Programmable Logic Controller that is provided with on the described experimental terminal is programmable computer controller PCC, this PCC control fieldbus transmission variables information; Described remote control terminal comprises Programmable Logic Controller PLC and the computer of corresponding PLC programming software is installed.
A kind of control method of above-mentioned Fieldbus Based industrial control network experiment porch, this method comprises the steps:
Set up engineering project in described experimental terminal;
Bus communication unit, primary scene transmission variables information in the described experimental terminal control communication module is to the field bus protocol modular converter;
But but described field bus protocol modular converter is converted to the second bus communication unit data packets for transmission to the above-mentioned first bus communication unit data packets for transmission;
Above-mentioned packet transfers to remote control terminal by the second bus communication unit;
Remote control terminal obtains above-mentioned data.
A kind of control method of above-mentioned Fieldbus Based industrial control network experiment porch, this method also comprises the steps:
Transmit control signal at remote control terminal, with the described experimental terminal of Long-distance Control;
Described remote control terminal is by the above-mentioned field bus protocol modular converter that controls signal to of the transmission of the bus communication unit, the secondary scene in the communication module;
But but described field bus protocol modular converter is converted to the first bus communication unit data packets for transmission to the above-mentioned second bus communication unit data packets for transmission;
Above-mentioned packet transfers to experimental terminal by the first bus communication unit;
Described experimental terminal is obtained above-mentioned data.
Beneficial effect of the present invention is: industrial control network experiment porch and control method thereof based on multiple fieldbus that the present invention proposes, by the field bus protocol transducer being realized the protocol conversion of multiple fieldbus, realize the data communication of two kinds of fieldbus.The system of Gou Jianing can be implemented in the message transmission that makes up in the laboratory between the different field bus devices like this, can allow the student contact a greater variety of fieldbus, and the interconnection of starting to realize different fieldbus data.
Description of drawings
Fig. 1 is the composition schematic diagram of Fieldbus Based industrial control network experiment porch among the embodiment one.
Fig. 2 is the composition schematic diagram of Fieldbus Based industrial control network experiment porch among the embodiment one.
Fig. 3 is the flow chart of experiment porch control method among the embodiment one.
Fig. 4 A to Fig. 4 D is the composition schematic diagram of Fieldbus Based industrial control network experiment porch among the embodiment two.
Fig. 5 is the composition schematic diagram of Fieldbus Based industrial control network experiment porch among the embodiment three.
Fig. 6 is the composition schematic diagram of Fieldbus Based industrial control network experiment porch among the embodiment five.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
Embodiment one
See also Fig. 1, the present invention has disclosed a kind of Fieldbus Based industrial control network experiment porch, and it comprises experimental terminal 10, communication module 30, the remote control terminal 20 that connects successively.
As shown in Figure 1, communication module 30 comprises field bus communication unit, and the field bus protocol modular converter 33 of at least two types series connection; In the present embodiment, communication module 30 comprises two dissimilar field bus communication unit---bus communication unit, primary scene 31, bus communication unit, the secondary scene 32.Wherein, bus communication unit, primary scene 31 connects experimental terminal 10 and field bus protocol modular converter 33, and bus communication unit, the secondary scene 32 connects remote control terminal 20 and field bus protocol modular converter 33.But but field bus protocol modular converter 33 is in order to be converted to other bus communication unit data packets for transmission to a certain bus communication unit data packets for transmission.
Above-mentioned two dissimilar field bus communication unit 31,32 can comprise two or more in CAN bus communication unit, PROFIBUS bus communication unit, the industry ethernet communication unit; But but described field bus protocol modular converter 33 is converted to other bus communication unit data packets for transmission with above-mentioned arbitrary bus communication unit data packets for transmission.
See also Fig. 2, particularly, in the present embodiment, bus communication unit, primary scene 31 is CAN bus communication unit 31 ', and bus communication unit, the secondary scene 32 is PROFIBUS bus communication unit 32 '.But but field bus protocol modular converter 33 is converted to the PROFIBUS bus communication unit 32 ' data packets for transmission with the CAN bus communication unit 31 ' data packets for transmission; But but also the PROFIBUS bus communication unit 32 ' data packets for transmission can be converted to the CAN bus communication unit 31 ' data packets for transmission.So, realize the data communication of two kinds of dissimilar fieldbus.
More than introduced the composition of the industrial control network experiment porch that the present invention is based on fieldbus, below introduced the control method of experiment porch of the present invention by Fig. 3; This method comprises the steps:
Step 1., set up engineering project in described experimental terminal 10; Described experimental terminal 10 control CAN bus communication unit 31 ' transmission variables information is to field bus protocol modular converter 33;
Step 2., but but described field bus protocol modular converter 33 is converted to the PROFIBUS bus communication unit 32 ' data packets for transmission to the CAN bus communication unit 31 ' data packets for transmission;
Step 3., above-mentioned packet transfers to remote control terminal by the second bus communication unit;
Step 4., remote control terminal obtains above-mentioned data.
Step 5., transmit control signal at remote control terminal 20, with the described experimental terminal 10 of Long-distance Control;
Step 6., described remote control terminal 20 is by the above-mentioned field bus protocol modular converter 33 that controls signal to of PROFIBUS bus communication unit 32 ' transmission;
Step 7., but but described field bus protocol modular converter 33 is converted to the CAN bus communication unit 31 ' data packets for transmission to the PROFIBUS bus communication unit 32 ' data packets for transmission;
Step 8., above-mentioned packet transfers to experimental terminal 10 by CAN bus communication unit 31 '; Described experimental terminal 10 is obtained above-mentioned data.
In sum, industrial control network experiment porch and control method thereof based on multiple fieldbus that the present invention proposes by the field bus protocol transducer being realized the protocol conversion of multiple fieldbus, realize the data communication of two kinds of fieldbus.The system of Gou Jianing can be implemented in the message transmission that makes up in the laboratory between the different field bus devices like this, can allow the student contact a greater variety of fieldbus, and the interconnection of starting to realize different fieldbus data.
Embodiment two
The difference of present embodiment and embodiment one is that in the present embodiment, described communication module 30 comprises at least two group field bus communication unit groups 310,320; Bus communication unit, primary scene group 310 is arranged between described experimental terminal and the field bus protocol modular converter, and bus communication unit, secondary scene group 320 is arranged between described remote control terminal and the field bus protocol modular converter.
Each field bus communication unit group 310,320 comprises field bus communication unit one or more, one or more types.Two groups of field bus communication unit groups connect by field bus protocol modular converter group 330, and field bus protocol modular converter group 330 comprises one or any a plurality of field bus protocol modular converter.
See also Fig. 4 A, among Fig. 4 A, bus communication unit, primary scene group 310 comprises some one type or polytype field bus communication unit 311,312,313; Bus communication unit, secondary scene group 320 comprises some one type or polytype field bus communication unit 321,322,323,324.Field bus protocol modular converter group 330 comprises a field bus protocol modular converter; Each communication unit in bus communication unit, primary scene group 310 and bus communication unit, the secondary scene group 320 carries out protocol conversion by this same field bus protocol modular converter.
Communication unit quantity in the field bus communication unit group 310,320 can be consistent, also can be different; The one or more field bus communications unit of one of them field bus communication unit in can corresponding another group.
See also Fig. 4 B, among Fig. 4 B, field bus protocol modular converter group 330 comprises a plurality of field bus protocol modular converters 331,332, can certainly comprise more a plurality of.Each communication unit in bus communication unit, primary scene group 310 and bus communication unit, the secondary scene group 320 carries out protocol conversion by a plurality of field bus protocol modular converters.
See also Fig. 4 C, reach Fig. 4 D, among Fig. 4 C, field bus communication unit group 310 only comprises a field bus communication unit 311, a plurality of field bus communications unit 321,322,323,324 in the field bus communication unit 311 corresponding field bus communication unit groups 320.Among Fig. 4 D, field bus communication unit group 320 only comprises a field bus communication unit 321, a plurality of field bus communications unit 311,312,313 in the field bus communication unit 321 corresponding field bus communication unit groups 310.
In addition, in the present embodiment, a plurality of field bus communications unit 311,312,313 can be connected same experimental terminal 10, also can connect different experimental terminal 10; Field bus communication unit 321,322,323,324 can be connected same remote control terminal 20, also can connect different remote control terminal 20.
Embodiment three
The difference of present embodiment and above embodiment is that in the present embodiment, described communication module comprises the communication submodule of some parallel connections; Each communication submodule comprises the field bus communication unit between described experimental terminal of at least two types be series at and the remote control terminal, in order to transmit the data between described experimental terminal and the remote control terminal; Between the different field bus communication unit of described series connection, the field bus protocol modular converter is set.
As shown in Figure 5, in the present embodiment, communication module 30 comprises the communication submodule 300 of three parallel connections, each communication submodule 300 comprises two kinds of dissimilar field bus communication unit 31,32, between the field bus communication unit 31,32 of described two series connection field bus protocol modular converter 33 is set.
Embodiment four
In the present embodiment, Fieldbus Based industrial control network experiment porch comprises experimental terminal 10, communication module 30, the remote control terminal 20 that connects successively; Communication module 30 comprises the field bus communication unit, reaches the field bus protocol modular converter.
Above-mentioned experimental terminal 10 comprises power supply, B﹠amp; R 2003 Series PC C and B﹠amp is housed; Carry out RS232 between the computer of R AutomationStudio software, PCC and computer and communicate by letter, can set up the engineering project of terminal by software.
Above-mentioned remote control terminal 20 comprises power supply, Simens S7-300PLC, the computer that STEP7_SIMATICManager software is housed and action button, and major function is that Remote is equipped with B﹠amp at other one; The experimental bench of R2003 Series PC C.
Above-mentioned field bus communication unit comprises bus termination device and bus dedicated transmission, the main packet of being responsible for after transmission is changed.
Above-mentioned field bus protocol modular converter mainly is made of the multiprotocol conversion device, the CAN bus can be wanted data packets for transmission to become PROFIBUS (perhaps Ethernet) through conversion can data packets for transmission, perhaps PROFIBUS being wanted data packets for transmission to become CAN (perhaps Ethernet) through conversion can data packets for transmission, perhaps carries out the conversion of other bus data bags.
Experiment porch control method of the present invention can comprise following job step:
(1) the terminal entry purpose is set up: B﹠amp is being housed; On the experimental bench of R 2003 Series PC C, utilize software B﹠amp; R Automation Studio sets up local engineering project;
(2) conversion of field bus protocol: data packets for transmission to become PROFIBUS (perhaps Ethernet) through conversion the CAN bus can data packets for transmission;
(3) communication module: the packet after will changing is by special-purpose field bus communication line transmission;
(4) remote control terminal: on the experimental bench that Simens S7-300PLC is housed, utilize software STEP7_SIMATIC Manager or action button to realize Long-distance Control.
The invention has the advantages that:
1, the present invention is multi-disciplinary intersections such as electrical control PLC, computer, network service, has improved the experiment condition of university's industrial control network, and extensibility is good, and the content of research is abundanter;
2, utilize lab construction of the present invention to realize the integrated of multiple fieldbus, make breadboard utilance that sufficient raising arranged, and be to belong to the laboratory transformation project, for laboratory in colleges and universities's construction provides a new thinking;
3, the present invention can be widely applied to other subject experimental teaching through suitably expansion, improves the practical efficient of experimental situation greatly.
Embodiment five
The difference of present embodiment and above embodiment is, in the present embodiment, communication module can also comprise the field bus communication unit more than three types, it is connected between experimental terminal 10, the process control terminal 20, connect by field bus protocol modular converter 33 between per two field bus communication unit, as shown in Figure 6.This kind technical scheme also within the scope of the invention.
Here description of the invention and application is illustrative, is not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or substantive characteristics, and the present invention can be with other form, structure, layout, ratio, and realize with other assembly, material and parts.Under the situation that does not break away from the scope of the invention and spirit, can carry out other distortion and change here to disclosed embodiment.
Claims (10)
1. Fieldbus Based industrial control network experiment porch is characterized in that it comprises:
Experimental terminal, it comprises Programmable Logic Controller, this controller control fieldbus transmission variables information;
Remote control terminal is in order to the described experimental terminal of Long-distance Control;
Communication module is in order to transmit the data between described experimental terminal and the remote control terminal; This communication module comprises
At least two types, be series at the field bus communication unit between described experimental terminal and the remote control terminal: bus communication unit, primary scene, bus communication unit, the secondary scene; And
The field bus protocol modular converter is arranged between the field bus communication unit of described series connection, but but in order to a certain bus communication unit data packets for transmission is converted to other bus communication unit data packets for transmission.
2. Fieldbus Based industrial control network experiment porch according to claim 1 is characterized in that:
Described communication module comprises at least two group field bus communication unit groups;
Bus communication unit, primary scene group is arranged between described experimental terminal and the field bus protocol modular converter, and bus communication unit, secondary scene group is arranged between described remote control terminal and the field bus protocol modular converter;
Each field bus communication unit group comprises field bus communication unit one or more, one or more types;
Two groups of field bus communication unit groups connect by same or any a plurality of field bus protocol modular converter, but but realize a certain bus communication unit data packets for transmission is converted to other bus communication unit data packets for transmission.
3. Fieldbus Based industrial control network experiment porch according to claim 1 is characterized in that:
Described communication module comprises two types field bus communication unit, connects by the field bus protocol modular converter between these two field bus communication unit.
4. Fieldbus Based industrial control network experiment porch according to claim 1 is characterized in that:
Described communication module comprises the communication submodule of some parallel connections;
Each communication submodule comprise at least two types, be series at the field bus communication unit between described experimental terminal and the remote control terminal, in order to transmit the data between described experimental terminal and the remote control terminal;
Between the different field bus communication unit of described series connection, the field bus protocol modular converter is set.
5. according to the arbitrary described Fieldbus Based industrial control network experiment porch of claim 1 to 4, it is characterized in that:
Described communication module comprises two or more in CAN bus communication unit, PROFIBUS bus communication unit, the industry ethernet communication unit;
But but described field bus protocol modular converter is converted to other bus communication unit data packets for transmission with above-mentioned arbitrary bus communication unit data packets for transmission.
6. according to the arbitrary described Fieldbus Based industrial control network experiment porch of claim 1 to 4, it is characterized in that:
The Programmable Logic Controller that is provided with on the described experimental terminal is programmable computer controller PCC, this PCC control fieldbus transmission variables information;
Described remote control terminal comprises Programmable Logic Controller PLC and the computer of corresponding PLC programming software is installed.
7. the control method of the arbitrary described Fieldbus Based industrial control network experiment porch of claim 1 to 6 is characterized in that, this method comprises the steps:
Bus communication unit, primary scene transmission variables information in the described experimental terminal control communication module is to the field bus protocol modular converter;
But but described field bus protocol modular converter is converted to the second bus communication unit data packets for transmission to the above-mentioned first bus communication unit data packets for transmission;
Above-mentioned packet transfers to remote control terminal by the second bus communication unit;
Remote control terminal obtains above-mentioned data.
8. the control method of Fieldbus Based industrial control network experiment porch according to claim 7 is characterized in that:
Described communication module comprises at least two group field bus communication unit groups;
Bus communication unit, primary scene group is arranged between described experimental terminal and the field bus protocol modular converter, and bus communication unit, secondary scene group is arranged between described remote control terminal and the field bus protocol modular converter;
Each field bus communication unit group comprises field bus communication unit one or more, one or more types;
Two groups of field bus communication unit groups connect by same or any a plurality of field bus protocol modular converter, but but realize a certain bus communication unit data packets for transmission is converted to other bus communication unit data packets for transmission.
9. the control method of the arbitrary described Fieldbus Based industrial control network experiment porch of claim 1 to 6 is characterized in that, this method comprises the steps:
Transmit control signal at remote control terminal, with the described experimental terminal of Long-distance Control;
Described remote control terminal is by the above-mentioned field bus protocol modular converter that controls signal to of the transmission of the bus communication unit, the secondary scene in the communication module;
But but described field bus protocol modular converter is converted to the first bus communication unit data packets for transmission to the above-mentioned second bus communication unit data packets for transmission;
Above-mentioned packet transfers to experimental terminal by the first bus communication unit;
Described experimental terminal is obtained above-mentioned data.
10. the control method of Fieldbus Based industrial control network experiment porch according to claim 9 is characterized in that:
Described communication module comprises at least two group field bus communication unit groups;
Bus communication unit, primary scene group is arranged between described experimental terminal and the field bus protocol modular converter, and bus communication unit, secondary scene group is arranged between described remote control terminal and the field bus protocol modular converter;
Each field bus communication unit group comprises field bus communication unit one or more, one or more types;
Two groups of field bus communication unit groups connect by same or any a plurality of field bus protocol modular converter, but but realize a certain bus communication unit data packets for transmission is converted to other bus communication unit data packets for transmission.
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| CN102323788A (en) * | 2011-07-15 | 2012-01-18 | 南京科远自动化集团股份有限公司 | Universal programmable logic controller (PLC) communication module for field bus |
| CN103159035A (en) * | 2013-03-21 | 2013-06-19 | 中煤科工集团武汉设计研究院 | Long distance pipeline coal transporting main channel optical communication system |
| CN106628070A (en) * | 2016-11-09 | 2017-05-10 | 重庆长安工业(集团)有限责任公司 | Control method based on marine D30mm system console |
| CN107124405A (en) * | 2017-04-21 | 2017-09-01 | 杭州知物数据科技有限公司 | Industrial Fieldbus protocols conversion method and device are realized based on FPGA |
| CN107272461A (en) * | 2017-07-26 | 2017-10-20 | 安徽建筑大学 | A kind of experiment porch control system based on multi-protocols |
| WO2018205204A1 (en) * | 2017-05-11 | 2018-11-15 | 深圳市柘叶红实业有限公司 | System for controlling automated instrument in laboratory based on local area network, and control method therefor |
| CN111026022A (en) * | 2019-12-26 | 2020-04-17 | 北京和利时智能技术有限公司 | Hardware configuration method of editable logic controller and related device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102323788A (en) * | 2011-07-15 | 2012-01-18 | 南京科远自动化集团股份有限公司 | Universal programmable logic controller (PLC) communication module for field bus |
| CN103159035A (en) * | 2013-03-21 | 2013-06-19 | 中煤科工集团武汉设计研究院 | Long distance pipeline coal transporting main channel optical communication system |
| CN106628070A (en) * | 2016-11-09 | 2017-05-10 | 重庆长安工业(集团)有限责任公司 | Control method based on marine D30mm system console |
| CN106628070B (en) * | 2016-11-09 | 2018-06-26 | 重庆长安工业(集团)有限责任公司 | Control method based on D30mm systems operation bench peculiar to vessel |
| CN107124405A (en) * | 2017-04-21 | 2017-09-01 | 杭州知物数据科技有限公司 | Industrial Fieldbus protocols conversion method and device are realized based on FPGA |
| WO2018205204A1 (en) * | 2017-05-11 | 2018-11-15 | 深圳市柘叶红实业有限公司 | System for controlling automated instrument in laboratory based on local area network, and control method therefor |
| CN107272461A (en) * | 2017-07-26 | 2017-10-20 | 安徽建筑大学 | A kind of experiment porch control system based on multi-protocols |
| CN111026022A (en) * | 2019-12-26 | 2020-04-17 | 北京和利时智能技术有限公司 | Hardware configuration method of editable logic controller and related device |
| CN111026022B (en) * | 2019-12-26 | 2022-01-25 | 北京和利时智能技术有限公司 | Hardware configuration method of editable logic controller and related device |
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Application publication date: 20101222 |