CN102014057A - EPA protocol-based industrial Ethernet communication method supporting real-time and non-real-time application - Google Patents
EPA protocol-based industrial Ethernet communication method supporting real-time and non-real-time application Download PDFInfo
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Abstract
The invention relates to the fields of automation and data communication, in particular to an industrial Ethernet data communication method supporting real-time and non-real-time automatic application, and can solve the problem to achieve highly real-time communication of an industrial Ethernet in motion control. The method comprises that: when real-time data is generated in the real-time application process of an environmental protection agency (EPA) field device, the data enters a real-time channel, and a real-time data identifier is added at the tail of the whole data frame through the real-time channel; after receiving a real-time data message, the EPA field device begins to scan from the tail of the whole data frame and judges whether the real-time data identifier is identified as the real-time data, if so, the data frame is transmitted into an EPA real-time data channel; and when the EPA field device receives or transmits a non-real-time data message, the non-real-time data is processed by a standard transmission control protocol (TCP) user datagram protocol (UDP)/internet protocol (IP) protocol entity and an EPA communication dispatching management entity.
Description
Technical field
The present invention relates to automation and data communication field, be specifically related to a kind of the support in real time and the Industrial Ethernet data communications method of non real-time automation application.
Background technology
Be used for commercial measurement and control system the Industrial Ethernet technological incorporation automation, communicate by letter and computer technology, it is applied to the ISO/IEC8802-3 of computer network and ICP/IP protocol during industrial automation communicates by letter, the plurality of sensors, actuator, controller and the station device that are distributed in the industrial production scene are coupled together with Ethernet, make all devices collaborative work, finish the measurement and the control of industrial processes jointly.
Yet, existing Industrial Ethernet technology is difficult to be applied in the automatic control based on motion control, can not satisfy the requirement of motion control to high real-time, and require too high to the computational resource of apparatus for network node, increase the hardware cost and the technical sophistication degree of node device greatly, reduced the reliability of system.Also do not have in the prior art and support in real time and the Industrial Ethernet data communications method of non real-time automation application, can not satisfy the high real-time problem in the requirement, particularly motion control that industrial process automation communicates by letter.
Summary of the invention
In view of this, in order to address the above problem, the invention discloses a kind of Industrial Ethernet data communications method real-time and that non real-time is used of supporting, can solve the high real-time communication issue of Industrial Ethernet in the motion control, the high real-time communication of Industrial Ethernet in the motion control and the real-time communicating requirement in the process control can be satisfied, the remote access of Industrial Ethernet and the requirement of Long-distance Control can be satisfied simultaneously again.
The object of the present invention is achieved like this: a kind of Industrial Ethernet communication means that support is real-time and non real-time is used based on the EPA agreement, in the EPA network, the EPA field apparatus is connected by EPA Industrial Ethernet switch with the EPA watch-dog, and the non-realtime traffic between EPA field apparatus and the monitoring level equipment provides the service of TCP/IP standard traffic by EPA Industrial Ethernet switch; Set up the EPA field apparatus MAC Address that port articulates and the address mapping table of Port IP address in EPA Industrial Ethernet switch inside, when non-realtime traffic takes place first, EPA Industrial Ethernet switch will be set up the virtual of a non-realtime traffic and be connected between EPA field apparatus and EPA watch-dog, for the real time communication between the EPA field apparatus, EPA Industrial Ethernet switch is transmitted according to MAC Address;
After the real-time application process of EPA field apparatus produced real time data, data entered the real-time channel, and the real-time channel is added on the real time data identifier afterbody of whole Frame;
After the EPA field apparatus receives the real time data message, will begin scanning from the afterbody of whole Frame, judge whether the real time data identifier is designated real time data, in this way, then this Frame is sent into the EPA real-time data channel;
When the EPA field apparatus receives or send the non-real-time data message, non-real-time data will be handled through TCP (the UDP)/IP protocol entity and the EPA communication scheduling management entity of standard.
Further, described real time data identifier is 2 bytes, is made up of 4 real time data signs and 12 link service data unit length;
Further, in the grand cycle of communication, EPA equipment sends real time data in the real time phase timeslice that sets in advance, and sends non-real-time data in any time except that the real time phase timeslice;
Further, in the real-time Data Transmission stage, EPA Industrial Ethernet switch will directly be transmitted real-time packet to destination, the non real-time message that buffer memory receives from each port, and according to the IP address size of sending ending equipment in message priority height and the message message is sorted, in the non-real-time data transmit stage non real-time message is forwarded to each destination interface according to the order of sequence then;
Further, in the non-real-time data transmit stage, EPA Industrial Ethernet switch is forwarded to each destination interface according to the order of sequence with the non real-time message, simultaneously the non real-time message that will receive from each port and be inserted in the non real-time message queue of having sorted according to the IP address size of sending ending equipment message priority height and the message.
Beneficial effect of the present invention is as follows: can support simultaneously in real time and non real-time is answered, solve the high real-time communication issue of Industrial Ethernet in the motion control, the high real-time communication of Industrial Ethernet in the motion control and the real-time communicating requirement in the process control can be satisfied, the remote access of Industrial Ethernet and the requirement of Long-distance Control can be satisfied again; The present invention is directed to the characteristics of EPA network self, greatly promoted the real-time of whole EPA network, and effectively reduced, also reduced the load of EPA network simultaneously to a great extent at the load of opening EPA field apparatus under the EPA communication scheduling function situation.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing:
The EPA communication protocol model that Fig. 1 supports in real time and non real-time is used;
The Industrial Ethernet traffic model schematic diagram that Fig. 2 supports in real time and non real-time is used;
The Industrial Ethernet communication means message process chart that Fig. 3 supports in real time and non real-time is used;
The EPA communication scheduling schematic diagram that Fig. 4 supports in real time and non real-time is used.
Embodiment
Below will be described in detail the preferred embodiments of the present invention.
According to the difference of EPA control system response time, the communication between distinct device in the EPA system is divided into real time communication and non-realtime traffic.Wherein:
Real time communication is meant system to the very strict communication of response time requirement, and its typical response time is usually between 5 to 10ms.The EPA real time data is meant the data relevant with process, presses measured value, the controlling value of the control cycle transmission of control loop as needs, or needs by the cycle data updated between the functional block input, output.
Non-realtime traffic is meant the communication that system is lower to response time requirement, and its typical response time is usually about 100ms.The EPA non-real-time data is meant data such as the last data download, variable read-write data, event notice, trend report of logical data of TCP/IP standard and program.
Figure 1 shows that and support EPA communication protocol model real-time and that non real-time is used.Real-time packet transmits in the real-time channel.When handling real time data, directly giving the EPA real-time data channel by EPA communication scheduling management entity with the data of data link layer handles, by this real-time channel, greatly reduced the processing time of message in communication stack, thereby improved the performance of process data refresh rate aspect, the real-time of network is greatly improved.Communicate by letter with traditional EPA and to compare, support in real time and the EPA of non real-time application communicates by letter, its real-time has exceeded 50%.And compare PROFIBUS and FF HSE, support EPA communication means real-time and that non real-time is used aspect real-time, also to exceed 10% ~ 30%.
Non-realtime traffic requires relatively lowly to real-time, and occurs between EPA field apparatus and the remote supervisory and control(ling) equipment.Non-real-time data is transferred to IT application agreement or the processing of EPA communication scheduling management entity after handling via UDP, IP layer.In addition, application process can be encapsulated into real time data in the non real-time message in real time, handles according to the non real-time method of message.
Figure 2 shows that and support Industrial Ethernet communication scheme real-time and that non real-time is used.Exchanges data between the demanding EPA field apparatus of real-time is occurred in scene equipment level.Real time data is transmitted in the real-time channel, has greatly reduced the time that takies on the communication stack, has reduced the reaction time of system.Require lower EPA field apparatus and the exchanges data between the remote configuration watch-dog will pass through scene equipment level and supervisory layers to real-time, data are supported the various deproceduring data communication of TCP/IP standard traffic and EPA simultaneously in the non real-time channel transfer.
Figure 3 shows that and support Industrial Ethernet communication means message process chart real-time and that non real-time is used.After EPA functional block application process produces real time data, through EPA application entity and EPA socket mapping entity, pass to the real-time channel, the real-time channel is attached to the real time data identifier afterbody of whole Frame, be submitted to EPA communication scheduling management entity then and do further processing, up to message being sent in the network by physical port.After the non real-time application process produced non-real-time data, non-real-time data will be by application corresponding layer, TCP(UDP)/the IP layer after, be submitted to EPA communication scheduling management entity and do further processing, up to message being sent in the network by physical port.
After the EPA field apparatus received a complete Frame, equipment passed to real-time data channel with this Frame.The real-time channel will begin scanning from the afterbody of whole Frame.If detect the length and the link service data unit equal in length of last 12 bit representations of Frame, and the real time data identifier of Frame the inside is 1010, and this Frame is exactly an EPA real time data frame so.This Frame will be uploaded to the EPA application entity by real-time data channel, and the EPA application entity is uploaded to EPA functional block application process after having done respective handling again.If detect this Frame is a non-real-time data, then gives UDP/IP protocol entity and IT application layer entity, and does respective handling, passes to the non real-time application process at last.
Concrete, for the EPA field apparatus:
1) supports in real time and the EPA field apparatus of non-realtime traffic that its software has also defined the real-time channel except each primary clustering that has comprised the EPA system configuration.The real-time channel provides the real-time communication service between EPA object and Ethernet.
2) roadside, real-time channel TCP(UDP)/the IP layer, it is optimized the 2nd layer of ISO/OSI Reference Model, in this layer improved real-time protocol (RTP) the addressing of packet is not realized by the IP address, and the MAC Address of use receiving equipment guarantees and the compatibility of other standard agreements in consolidated network simultaneously.
3) real-time channel is added the mode of the real time data identifier of 2 bytes and is discerned the EPA real time data by on the encapsulation format basis of Ethernet at the Frame afterbody.The real time data identifier is made up of two parts: 4 real time data identifier, 1010 these processes of expression are EPA functional block real-time processes.12 link service data unit length.After EPA equipment receives a complete Frame, the real-time channel will begin scanning from the afterbody of whole Frame.If preceding four that detect in the real time data identifier is 1010, and the length of last 12 bit representations of Frame and link service data unit equal in length, this Frame is exactly an EPA real time data frame so.These data will be uploaded to the EPA application entity by real-time data channel, and the EPA application entity is uploaded to EPA functional block application process after having done respective handling again.
4) after EPA functional block application process produces real time data, after the EPA application entity, pass to the real-time channel, the real-time channel is attached to the real time data identifier afterbody of whole Frame, be submitted to EPA communication scheduling management entity then and do further processing, up to message being sent in the network by physical port.
5) after the non real-time application process produces non-real-time data, non-real-time data will (the TCP/IP normal data will be by the IT application layer by the application corresponding layer, and data such as the last data download of the program in the EPA agreement, variable read-write data, event notice, trend report will be by the EPA application entity), TCP(UDP)/the IP layer after, be submitted to EPA communication scheduling management entity and do further processing, up to message being sent in the network by physical port.
For the EPA switch:
1) EPA Industrial Ethernet switch couples together field apparatus level equipment in the EPA network and monitoring level equipment.The EPA field apparatus does not possess TCP/IP standard traffic ability in this network, and the non-realtime traffic between EPA field apparatus and the monitoring level equipment provides respective service by EPA Industrial Ethernet switch.
2) EPA Industrial Ethernet switch is articulated in record the MAC Address of the EPA field apparatus of each port, and EPA Industrial Ethernet switch has disposed an IP address that meets ICP/IP protocol for each available port in advance, has just set up one in EPA Industrial Ethernet switch inside like this and has hanged up the address mapping table that connects EPA field apparatus MAC Address and Port IP address.
3) non-realtime traffic is initiated by the EPA field apparatus, after the non-real-time data message arrives EPA Industrial Ethernet switch, EPA Industrial Ethernet switch extracts data message from buffer memory, and according to 2) in address mapping table, add the ICP/IP protocol field that is used for non-realtime traffic, again data message forwarding is arrived monitoring level equipment.Monitoring level equipment will use the ARP agreement to carry out the MAC Address inquiry according to the data message IP address that receives.After the ARP request message arrives, EPA Industrial Ethernet switch is searched corresponding IP address according to purpose ethernet address in the ARP request message in address mapping table, and, send the arp reply message to monitoring level equipment according to the MAC Address of IP address that finds and EPA equipment.So just between EPA field apparatus and monitoring level equipment, set up the virtual of a non-realtime traffic and be connected, guaranteed proper communication between EPA field apparatus and the monitoring level equipment.
4) for the real time communication between the EPA field apparatus, EPA Industrial Ethernet switch is transmitted according to MAC Address.
Figure 4 shows that and support EPA communication scheduling schematic diagram real-time and that non real-time is used.In an EPA micro network segment, the communication of all EPA equipment is all undertaken by the cycle, finishes a required time T of communication cycle and is called a grand cycle of communication.The grand period T of communication is divided into two stages, and wherein first stage is that real-time packet sends stage Tp, and second stage sends stage Tn for the non real-time message.In the whole grand cycle, EPA equipment can also send non-real-time data in all the other times except sending the real time data in the timeslice that sets in advance, greatly improved network bandwidth utilance.Communicate by letter with traditional EPA and to compare, support in real time and the EPA of non real-time application communicates by letter, its network bandwidth utilance has exceeded 40%.And compare PROFIBUS and FF HSE, support in real time and the EPA communication means of non real-time application that its network bandwidth utilance has also exceeded the former 15% ~ 35%.
In the real-time Data Transmission stage, EPA Industrial Ethernet switch will directly be transmitted real-time packet to destination, and the non real-time message that receives from each port of buffer memory, and message is sorted, and the non real-time message is forwarded to each destination interface according to the order of sequence in the non-real-time data transmit stage according to its priority height, transmitting terminal IP address size.
In the non-real-time data transmit stage, the non real-time message that EPA Industrial Ethernet switch will receive from each port according to priority height, transmitting terminal IP address size is inserted into the non real-time message queue of having sorted, and continues to transmit the non real-time message.
So both met EPA communication scheduling rules, and also improved the bandwidth availability ratio and the throughput of whole network simultaneously, and effectively reduced the transmission and the field apparatus burden of redundant broadcast message, the performance of equipment also gets a promotion, and has greatly improved the real-time of network.
The above only preferably is not limited to the present invention for of the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (5)
1. based on the support of EPA agreement in real time and the Industrial Ethernet communication means of non real-time application, it is characterized in that: in the EPA network, the EPA field apparatus is connected by EPA Industrial Ethernet switch with the EPA watch-dog, and the non-realtime traffic between EPA field apparatus and the monitoring level equipment provides the service of TCP/IP standard traffic by EPA Industrial Ethernet switch; Set up the EPA field apparatus MAC Address that port articulates and the address mapping table of Port IP address in EPA Industrial Ethernet switch inside, when non-realtime traffic takes place first, EPA Industrial Ethernet switch will be set up the virtual of a non-realtime traffic and be connected between EPA field apparatus and EPA watch-dog, for the real time communication between the EPA field apparatus, EPA Industrial Ethernet switch is transmitted according to MAC Address;
After the real-time application process of EPA field apparatus produced real time data, data entered the real-time channel, and the real-time channel is added on the real time data identifier afterbody of whole Frame;
After the EPA field apparatus receives the real time data message, will begin scanning from the afterbody of whole Frame, judge whether the real time data identifier is designated real time data, in this way, then this Frame is sent into the EPA real-time data channel;
When the EPA field apparatus receives or send the non-real-time data message, non-real-time data will be handled through TCP (the UDP)/IP protocol entity and the EPA communication scheduling management entity of standard.
2. the Industrial Ethernet communication means that support is real-time and non real-time is used based on the EPA agreement as claimed in claim 1, it is characterized in that: described real time data identifier is 2 bytes, is made up of 4 real time data signs and 12 link service data unit length.
3. the Industrial Ethernet communication means that support is real-time and non real-time is used based on the EPA agreement as claimed in claim 1 or 2, it is characterized in that: in the grand cycle of communication, EPA equipment sends real time data in the real time phase timeslice that sets in advance, send non-real-time data in any time except that the real time phase timeslice.
4. the Industrial Ethernet communication means that support is real-time and non real-time is used based on the EPA agreement as claimed in claim 3, it is characterized in that: in the real-time Data Transmission stage, EPA Industrial Ethernet switch will directly be transmitted real-time packet to destination, the non real-time message that buffer memory receives from each port, and according to the IP address size of sending ending equipment in message priority height and the message message is sorted, in the non-real-time data transmit stage non real-time message is forwarded to each destination interface according to the order of sequence then.
5. the Industrial Ethernet communication means that support is real-time and non real-time is used based on the EPA agreement as claimed in claim 3, it is characterized in that: in the non-real-time data transmit stage, EPA Industrial Ethernet switch is forwarded to each destination interface according to the order of sequence with the non real-time message, simultaneously the non real-time message that will receive from each port and be inserted in the non real-time message queue of having sorted according to the IP address size of sending ending equipment message priority height and the message.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244681A (en) * | 2011-07-19 | 2011-11-16 | 易程科技股份有限公司 | Method and system for data transmission |
| CN103841148A (en) * | 2012-11-23 | 2014-06-04 | 京信通信***（中国）有限公司 | Master-slave communication method and system adopting reliable and unreliable networks in monitoring program |
| CN105959195A (en) * | 2016-06-23 | 2016-09-21 | 北京东土科技股份有限公司 | Industrial internet field level broadband bus technology implementation method |
| CN106101021A (en) * | 2016-05-31 | 2016-11-09 | 河南理工大学 | A kind of Ethernet system functional device perform dispatching method in real time |
| CN111682994A (en) * | 2020-04-29 | 2020-09-18 | 浙江杰芯科技有限公司 | Annular or linear network system based on EPA protocol and transmission method of non-real-time data |
| CN112313587A (en) * | 2018-07-09 | 2021-02-02 | 大族激光科技产业集团股份有限公司 | Data processing method of numerical control system, computer equipment and storage medium |
| CN112448924A (en) * | 2019-08-30 | 2021-03-05 | 北京东土科技股份有限公司 | Message processing method, system and switching equipment compatible with multiple protocols |
| CN112769598A (en) * | 2020-12-25 | 2021-05-07 | 武汉华中数控股份有限公司 | Message transmission module, network communication system and communication implementation method thereof |
| CN113873046A (en) * | 2021-12-01 | 2021-12-31 | 浙江国利信安科技有限公司 | EPA equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529967A (en) * | 2001-03-16 | 2004-09-15 | Method and system for coupling data networks | |
| US20050041690A1 (en) * | 2001-09-26 | 2005-02-24 | Siemens Aktiengesellschaft | Method for transmitting real-time data messages in a cyclic communications system |
| CN200950596Y (en) * | 2006-06-30 | 2007-09-19 | 苏州市震旦电力科技有限公司 | Industry Ethernet real-time data transmission and switch circuit |
| CN101075945A (en) * | 2006-05-19 | 2007-11-21 | 中国科学院沈阳自动化研究所 | Method for determining realtime Ethernet tlecommunication |
-
2010
- 2010-11-25 CN CN2010105592549A patent/CN102014057A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529967A (en) * | 2001-03-16 | 2004-09-15 | Method and system for coupling data networks | |
| US20050041690A1 (en) * | 2001-09-26 | 2005-02-24 | Siemens Aktiengesellschaft | Method for transmitting real-time data messages in a cyclic communications system |
| CN101075945A (en) * | 2006-05-19 | 2007-11-21 | 中国科学院沈阳自动化研究所 | Method for determining realtime Ethernet tlecommunication |
| CN200950596Y (en) * | 2006-06-30 | 2007-09-19 | 苏州市震旦电力科技有限公司 | Industry Ethernet real-time data transmission and switch circuit |
Non-Patent Citations (1)
| Title |
|---|
| 《用于工业测量与控制***的EPA***结构与通信规范》 20061130 中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会 用于工业测量与控制***的EPA***结构与通信规范 中国标准出版社 6.2节至6.4节 1-5 , 1 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244681A (en) * | 2011-07-19 | 2011-11-16 | 易程科技股份有限公司 | Method and system for data transmission |
| CN103841148A (en) * | 2012-11-23 | 2014-06-04 | 京信通信***（中国）有限公司 | Master-slave communication method and system adopting reliable and unreliable networks in monitoring program |
| CN106101021A (en) * | 2016-05-31 | 2016-11-09 | 河南理工大学 | A kind of Ethernet system functional device perform dispatching method in real time |
| CN106101021B (en) * | 2016-05-31 | 2019-06-14 | 河南理工大学 | A kind of real-time execution dispatching method of Ethernet system functional block |
| CN105959195A (en) * | 2016-06-23 | 2016-09-21 | 北京东土科技股份有限公司 | Industrial internet field level broadband bus technology implementation method |
| CN112313587A (en) * | 2018-07-09 | 2021-02-02 | 大族激光科技产业集团股份有限公司 | Data processing method of numerical control system, computer equipment and storage medium |
| US11513493B2 (en) | 2018-07-09 | 2022-11-29 | Han's Laser Technology Industry Group Co., Ltd. | Control system driven by real time and non-real time data |
| CN112448924A (en) * | 2019-08-30 | 2021-03-05 | 北京东土科技股份有限公司 | Message processing method, system and switching equipment compatible with multiple protocols |
| CN111682994A (en) * | 2020-04-29 | 2020-09-18 | 浙江杰芯科技有限公司 | Annular or linear network system based on EPA protocol and transmission method of non-real-time data |
| CN111682994B (en) * | 2020-04-29 | 2022-03-29 | 浙江杰芯科技有限公司 | Annular or linear network system based on EPA protocol and transmission method of non-real-time data |
| CN112769598A (en) * | 2020-12-25 | 2021-05-07 | 武汉华中数控股份有限公司 | Message transmission module, network communication system and communication implementation method thereof |
| CN112769598B (en) * | 2020-12-25 | 2022-06-07 | 武汉华中数控股份有限公司 | Network communication system and communication implementation method thereof |
| CN113873046A (en) * | 2021-12-01 | 2021-12-31 | 浙江国利信安科技有限公司 | EPA equipment |
| CN113873046B (en) * | 2021-12-01 | 2022-03-11 | 浙江国利信安科技有限公司 | EPA equipment |
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Application publication date: 20110413 |