CN116991121A - EPA scheduling method and device compatible with multiple protocols - Google Patents
EPA scheduling method and device compatible with multiple protocols Download PDFInfo
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- CN116991121A CN116991121A CN202310704024.4A CN202310704024A CN116991121A CN 116991121 A CN116991121 A CN 116991121A CN 202310704024 A CN202310704024 A CN 202310704024A CN 116991121 A CN116991121 A CN 116991121A
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- 238000004806 packaging method and process Methods 0.000 claims abstract description 10
- 230000000737 periodic effect Effects 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 5
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32252—Scheduling production, machining, job shop
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Abstract
The invention discloses a multi-protocol compatible EPA scheduling method, which comprises the steps that an application layer module transmits EPA application data to an EPA protocol stack, and an application layer module transmits non-EPA application data to a non-EPA channel. And packaging the EPA application data and/or the non-EPA application data, caching, and then giving a request sending message to a sending management module. And scheduling and sending the EPA application data and/or the non-EPA application data according to the preset parameter configuration. The invention is provided with a configuration register, and can configure the protocol type, the message type and the priority of the EPA dispatching device through the configuration port. The EPA protocol stack is realized or transplanted according to the EPA standard protocol, and no protocol change is made. While supporting EPA protocol transmission, data messages supporting different protocols are transmitted in a network, and no data collision is generated. All protocol messages participate in real-time scheduling, and the priorities of different protocol messages can be flexibly configured according to practical application occasions.
Description
Technical Field
The invention belongs to the field of industrial control automation, and particularly relates to a EPA scheduling method and device compatible with multiple protocols.
Background
The bus is used as a neural network for connecting all devices in the industrial control system and is used for realizing real-time, reliable and safe transmission of data in the control system. Along with the continuous expansion of control scale and the increasing of control objects, the intelligent equipment has various types, and higher demands are put forward on the safety and usability of buses. In a large environment where "domestic" is being pursued, EPA bus, which is a bus with independent intellectual property rights in our country, stands out from a series of buses, however, EPA bus also has a large lifting space from the viewpoint of availability. Current EPA bus applications are also essentially limited to EPA inter-device communication, not with other protocols.
In view of the above, there are prior art improvements in the art with respect to EPA buses having application numbers CN110943899A and CN 106685735A. The patent CN110943899a modifies the EPA protocol message, and inserts a TSN identification field into the EPA message to interwork with the TSN message. The patent CN106685735A mainly adds a non-RTE communication stage on the basis of an EPA standard protocol, wherein EPA message data communication is carried out between an EPA master end or an EPA slave end in a RTE period stage and an RTE non-period stage according to the respective communication slot time length, and the EPA message data communication is used for sending or receiving EPA messages or common Ethernet messages in the non-RTE communication stage; however, the non-EPA message can only be sent at a fixed time, and there is a lower priority for transmission.
Therefore, there is a need for an EPA scheduler that not only achieves interworking with multiple protocols, but also ensures real-time performance of EPA messages and non-EPA protocol messages without changing the original EPA standard communication messages.
Disclosure of Invention
The technical aim of the invention is to provide a EPA scheduling method and device compatible with multiple protocols, so as to solve the technical problem of insufficient EPA bus compatibility.
In order to solve the problems, the technical scheme of the invention is as follows:
a multi-protocol compatible EPA scheduling method, configured in a multi-protocol compatible EPA scheduling device, comprising the steps of:
transmitting EPA application data to an EPA protocol stack of the EPA scheduler by the application layer module, and transmitting non-EPA application data to a non-EPA channel of the EPA scheduler by the application layer module;
the transmission management module is used for packaging and caching EPA application data and/or non-EPA application data and then giving a request transmission message to the EPA scheduling device;
and scheduling and sending the EPA application data and/or the non-EPA application data according to the preset parameter configuration.
It is further preferred that the data is transported by the application layer further comprising configuring parameters of the EPA scheduler, the configuration parameters comprising basic parameters of the EPA protocol: macro period, period time, non-period time and transmission time offset, and a configuration parameter table related to multi-protocol compatibility, wherein the configuration parameter table comprises protocol type, message type and message priority.
The scheduling and sending of EPA application data and/or non-EPA application data according to the preset parameter configuration specifically comprises the following steps:
determining the scheduling priority of EPA application data and/or non EPA application data according to the protocol and the message type of the request message, preferentially sending the message with high priority, and then sending the message with low priority; the message with high priority can interrupt the message transmission with low relative priority, and the message with low priority is retransmitted and transmitted after the message with high priority is transmitted.
Further preferably, the method further comprises the steps of: receiving the message from the external network, judging and forwarding the protocol of the message, transferring the EPA message to an EPA protocol stack for receiving treatment, transferring the non-EPA message to a non-EPA channel for receiving treatment, and then transferring the application data after receiving treatment to an application layer module for further treatment.
The EPA scheduling device compatible with multiple protocols is applied with the EPA scheduling method compatible with multiple protocols, and comprises an application layer module, an EPA protocol stack, a non-EPA channel and a transmission management module;
the application layer module is respectively connected with the EPA protocol stack and the non-EPA channel signal and is used for transmitting EPA application data to the EPA protocol stack or transmitting non-EPA application data to the non-EPA channel;
the EPA protocol stack is used for packaging and caching EPA application data and then giving a request sending message to the sending management module;
the non-EPA channel is used for packaging and caching the non-EPA application data and then giving out a request sending message to the sending management module;
the sending management module is in signal connection with other external devices through an Ethernet interface and is used for determining the scheduling priority of EPA application data and/or non-EPA application data according to the protocol and the message type of the request sending message, sending the message with high priority preferentially and then sending the message with low priority; the message with high priority can interrupt the message transmission with low relative priority, and the message with low priority is retransmitted and transmitted after the message with high priority is transmitted.
Further preferably, the system further comprises a configuration register, wherein the configuration register is used for acquiring configuration parameters from an external upper computer, and the configuration parameters comprise basic parameters of the EPA protocol: macro period, period time, non-period time and transmission time offset, and a configuration parameter table related to multi-protocol compatibility, wherein the configuration parameter table comprises protocol type, message type and message priority.
The system further preferably further comprises a receiving management module which is in signal connection with the external network through an Ethernet interface and is respectively in signal connection with the EPA protocol stack and the non-EPA channel, and the receiving management module is used for receiving messages from the external network, judging and forwarding the protocol of the messages, transferring the EPA messages to the EPA protocol stack for receiving, transferring the non-EPA messages to the non-EPA channel for receiving, and then sending the received application data to the application layer module for further processing.
EPA message is adopted in EPA application data, and the EPA message comprises a periodic message, a synchronous message and an aperiodic message, and is distinguished by the 14 th byte of the EPA message.
By adopting the technical scheme, the invention has the following advantages and positive effects compared with the prior art:
the invention is provided with a configuration register, which is provided with a configuration port connected with an external controller, wherein the configuration port can be an Ethernet port, a PCIE interface, a serial interface and the like, and a PC or other main controllers carry out protocol type, message type and priority configuration on the EPA dispatching device through the configuration port.
The EPA protocol stack of the invention is realized or transplanted according to EPA standard protocol, and no protocol change is made.
The invention supports EPA protocol transmission and simultaneously supports data messages of different protocols to be transmitted in a network, and data conflict can not be generated.
All protocol messages participate in real-time scheduling, and the messages are sent first with high priority and then with low priority. The message transmission with high priority can be interrupted, and the message with low priority is retransmitted and transmitted after the message with high priority is transmitted. The priorities of the messages of different protocols can be flexibly configured according to practical application occasions.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
FIG. 1 is a flow chart of steps of a multi-protocol compatible EPA scheduling method of the present invention;
fig. 2 is a block diagram of a multi-protocol compatible EPA scheduler of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For the sake of simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
The following describes in further detail a multi-protocol compatible EPA scheduling method and apparatus according to the present invention with reference to the accompanying drawings and specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims.
Example 1
Referring to fig. 2, the present embodiment is based on an FPGA chip, and implements a multi-protocol compatible EPA scheduling device as shown in fig. 2, where the device specifically includes an application layer module, an EPA protocol stack, a non-EPA channel, a transmission management module, a configuration register, and a reception management module. In addition, the embodiment is provided with three interfaces, namely a configuration port, an ethernet communication interface and an application layer access interface. The configuration port is used for parameter configuration of the embodiment by the upper computer, and the configuration port can be an Ethernet port, a PCI E interface, a serial interface and the like; the ethernet communication interface is used for data intercommunication with other devices in this embodiment, and the application layer access interface is responsible for data transmission in the protocol application layer module.
The units of this embodiment will now be described, and the application layer module is connected to the EPA protocol stack and the non-EPA channel signal via the application layer access interface, respectively, and can transmit EPA application data to the EPA protocol stack or non-EPA application data to the non-EPA channel. Also, EPA application data may be received from the EPA protocol stack or non-EPA application data may be received from the non-EPA channel. The EPA protocol stack is used for packaging and caching the received EPA application data and then giving out a request sending message to the sending management module. The EPA protocol stack is realized or transplanted according to the EPA standard protocol, and no protocol change is made. The non-EPA channel is used for packaging and caching the non-EPA application data and then giving out a request sending message to the sending management module.
The sending management module is in signal connection with other external devices through an Ethernet interface, determines the scheduling priority of EPA application data and/or non-EPA application data according to the protocol and the message type of the request sending message, preferentially sends the message with high priority, and then sends the message with low priority. Further, the message with high priority can interrupt the message transmission with low relative priority, and the message with low priority is retransmitted and transmitted after the message with high priority is transmitted.
The configuration register obtains configuration parameters from an external upper computer through a configuration port, wherein the upper computer can be a PC or other main controllers. The configuration parameters include basic parameters of EPA protocol with parameter table as carrier: macro-period, period time, non-period time and transmission time offset, and multiprotocol compatible external protocol parameters, also taking parameter table as carrier, including protocol type, message type and message priority.
The receiving management module is connected with an external network through an Ethernet interface and is respectively connected with an EPA protocol stack and a non-EPA channel signal, and is used for receiving messages from other external devices through the network, judging and forwarding the protocol of the messages, transferring the EPA messages to the EPA protocol stack for receiving, transferring the non-EPA messages to the non-EPA channel for receiving, and then sending the application data after receiving to the application layer module for further processing.
In this embodiment, the network is connected to a 3-type communication protocol, which is an EPA protocol, an EtherCat protocol, and a normal ethernet protocol, respectively. EPA protocol number is 0x8907, etherCat protocol number is 0x88A4, IP message protocol number is 0x0800.EPA messages are of three types, respectively 0x10 (periodic messages), 0x20 (synchronous messages) and 0x30 (non-periodic messages) distinguished by the 14 th byte in the message; the common ethernet packet enumerates two types of I P packets, which are distinguished by the 15 th byte in the packet, namely 0x00 (icmp) and 0x10 (udp). The following table shows:
example 2
Referring to fig. 1, the present embodiment provides a multi-protocol-compatible EPA scheduling method, which is configured in a multi-protocol-compatible EPA scheduling device as in embodiment 1, and the implementation process thereof is as follows:
after powering up the EPA scheduling device, the upper computer configures parameters of the EPA scheduling device through the configuration port, wherein the configuration parameters comprise basic parameters of EPA protocol, such as macrocycle, cycle time, non-cycle time, transmission time offset and the like. The configuration parameters also include a configuration parameter table related to multi-protocol compatibility, such as protocol type, message type, and message priority.
After the configuration is completed, the device enters a normal working state.
And in the sending stage, the application layer module transmits EPA application data to the EPA protocol stack for packaging and caching, and triggers a sending request according to the arrival of the EPA protocol at the sending offset time. The application layer module also transmits non-EPA application data to enter a non-EPA channel for packaging and caching, and gives out a sending request.
And the to-be-transmitted management module performs scheduling transmission according to the configuration table after receiving the transmission request. And the module determines the scheduling priority of the current message according to the protocol and the message type of the message requested to be sent. First transmission with high priority and then transmission with low priority. The message transmission with high priority can be interrupted, and the message with low priority is retransmitted and transmitted after the message with high priority is transmitted. In this example, in order to ensure the real-time performance of EPA message scheduling and the accuracy of device synchronization, the periodic message and the synchronous message priority of EPA are set to be the highest. Because the periodic messages and the synchronous messages are respectively sent in the periodic time and the non-periodic time, the possibility of simultaneous sending does not exist, and the two messages have the same priority and cannot be preempted.
And finally, the receiving management module can receive the message from the network, judge and forward the message according to the message protocol, transfer the EPA message to an EPA protocol stack for receiving treatment, and transfer the non-EPA message to a non-EPA channel for receiving treatment. The received and processed application data is sent to an application layer module for further processing.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is within the scope of the appended claims and their equivalents to fall within the scope of the invention.
Claims (8)
1. A multi-protocol compatible EPA scheduling method, configured in a multi-protocol compatible EPA scheduling device, comprising the steps of:
transmitting EPA application data to an EPA protocol stack of the EPA scheduler by an application layer module, and transmitting non-EPA application data to a non-EPA channel of the EPA scheduler by the application layer module;
the EPA application data and/or non-EPA application data are packaged and cached, and then a request sending message is sent to a sending management module of the EPA dispatching device;
and scheduling and sending the EPA application data and/or the non-EPA application data according to the preset parameter configuration.
2. The multi-protocol compatible EPA scheduling method of claim 1, further comprising configuring parameters of the EPA scheduler prior to the application layer delivering data, the configuration parameters comprising basic parameters of the EPA protocol: macro period, period time, non-period time and transmission time offset, and a configuration parameter table related to multi-protocol compatibility, wherein the configuration parameter table comprises protocol type, message type and message priority.
3. The multi-protocol compatible EPA scheduling method of claim 2 wherein said scheduling transmission of EPA application data and/or non-EPA application data according to a preset parameter configuration comprises the steps of:
determining the scheduling priority of EPA application data and/or non EPA application data according to the protocol and the message type of the request message, preferentially sending the message with high priority, and then sending the message with low priority; the message with high priority can interrupt the message transmission with low relative priority, and the message with low priority is retransmitted and transmitted after the message with high priority is transmitted.
4. The multi-protocol compatible EPA scheduling method of claim 2, further comprising the steps of: receiving the message from the external network, judging and forwarding the protocol of the message, transferring the EPA message to an EPA protocol stack for receiving treatment, transferring the non-EPA message to a non-EPA channel for receiving treatment, and then transferring the application data after receiving treatment to an application layer module for further treatment.
5. A multi-protocol compatible EPA scheduling device, to which the multi-protocol compatible EPA scheduling method as claimed in claims 1 to 4 is applied, comprising an application layer module, an EPA protocol stack, a non-EPA channel and a transmission management module;
the application layer module is respectively connected with the EPA protocol stack and the non-EPA channel signal and is used for transmitting EPA application data to the EPA protocol stack or transmitting non-EPA application data to the non-EPA channel;
the EPA protocol stack is used for packaging and caching EPA application data and then giving out a request sending message to the sending management module;
the non-EPA channel is used for packaging and caching the non-EPA application data and then giving out a request sending message to the sending management module;
the sending management module is in signal connection with other external devices through an Ethernet interface and is used for determining the scheduling priority of EPA application data and/or non-EPA application data according to the protocol and the message type of the request sending message, sending the message with high priority preferentially and then sending the message with low priority; the message with high priority can interrupt the message transmission with low relative priority, and the message with low priority is retransmitted and transmitted after the message with high priority is transmitted.
6. The EPA scheduler of claim 5, further comprising a configuration register for obtaining configuration parameters from an external host, the configuration parameters including basic parameters of EPA protocol: macro period, period time, non-period time and transmission time offset, and a configuration parameter table related to multi-protocol compatibility, wherein the configuration parameter table comprises protocol type, message type and message priority.
7. The multi-protocol compatible EPA scheduler according to claim 5 further comprising a receiving management module, wherein the receiving management module is connected to an external network signal via an ethernet interface, and is connected to the EPA protocol stack and the non-EPA channel signal, respectively, and is configured to receive a packet from an external network, determine and forward a protocol of the packet, transfer the EPA packet to the EPA protocol stack for receiving, transfer the non-EPA packet to the non-EPA channel for receiving, and then send the application data after receiving to the application layer module for further processing.
8. The multi-protocol compatible EPA scheduler of claim 5 wherein EPA application data is EPA messages, including periodic, synchronous and non-periodic messages, distinguished by byte 14 of EPA messages.
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| CN202310704024.4A CN116991121A (en) | 2023-06-14 | 2023-06-14 | EPA scheduling method and device compatible with multiple protocols |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117376424A (en) * | 2023-12-08 | 2024-01-09 | 浙江国利信安科技有限公司 | Method for transmitting data, electronic device and storage medium |
| CN117395213A (en) * | 2023-12-08 | 2024-01-12 | 浙江国利信安科技有限公司 | EPA exchanger, data transmission system and method |
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2023
- 2023-06-14 CN CN202310704024.4A patent/CN116991121A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117376424A (en) * | 2023-12-08 | 2024-01-09 | 浙江国利信安科技有限公司 | Method for transmitting data, electronic device and storage medium |
| CN117395213A (en) * | 2023-12-08 | 2024-01-12 | 浙江国利信安科技有限公司 | EPA exchanger, data transmission system and method |
| CN117376424B (en) * | 2023-12-08 | 2024-02-23 | 浙江国利信安科技有限公司 | Method for transmitting data, electronic device and storage medium |
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