CN113824626A - Communication management method for preventing information interaction loss - Google Patents
Communication management method for preventing information interaction loss Download PDFInfo
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- 230000006854 communication Effects 0.000 title claims abstract description 51
- 238000004891 communication Methods 0.000 title claims abstract description 50
- 230000003993 interaction Effects 0.000 title claims abstract description 23
- 238000007726 management method Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 64
- 238000012795 verification Methods 0.000 claims abstract description 27
- 230000004044 response Effects 0.000 claims description 13
- 238000000605 extraction Methods 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000012790 confirmation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000013075 data extraction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/21—Monitoring or handling of messages
- H04L51/224—Monitoring or handling of messages providing notification on incoming messages, e.g. pushed notifications of received messages
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Abstract
The invention discloses a communication management method for preventing information interaction loss, which comprises the following steps: the monitoring host machine issues a data command for reading the first register group; the terminal equipment responds to the record report data of the first register group; the monitoring host receives the record report data of the first register group, carries out verification, and enters the next step if the verification is correct; the monitoring host machine issues a data command for reading the second register group; the terminal equipment responds to the recording report data of the second register group; the monitoring host receives the recording report data of the second register group, verifies the data and returns to the step of reading the first register group if the data is verified correctly; the communication management method for preventing the information interaction from being lost is characterized in that extraction of the required recorded report data can be completed only by one round of communication interaction operation at least, when communication is wrong, multiple times of communication interaction are carried out to ensure that the message is not lost, and both the reliability of data transmission and the communication efficiency are ensured.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a communication management method for preventing information interaction loss.
Background
In industrial control and various automatic control systems, in order to realize the online monitoring and control of the monitoring host computer on the whole automatic control system, the monitoring host computer needs to realize the interconnection and intercommunication of various intelligent terminal devices by adopting a consistent communication protocol through a communication network; in order to ensure the replaceability of various intelligent terminal devices at the data source and improve the convenience of project implementation and later maintainability of the whole automation system, a mature, stable and standard international communication protocol is usually selected to acquire required data information.
The existing communication between the monitoring host and the register group is generally divided into two types, one is that the monitoring host firstly issues a command for reading the register group of the record report, if the terminal equipment responds and passes a response message which is checked correctly, the monitoring host issues a confirmation command again, and after the terminal equipment receives the confirmation command, the last record report is cleared and the data of the next command for reading the register group of the record report is ready to be responded; if there is no response or the analysis error of the response message, the monitoring host will not issue the confirmation command, and the record report will not be cleared until the reading is successful.
And the other method is that all the record reports in the terminal equipment are uniformly compiled and coded, the monitoring host reads the index number range of the record reports stored in the current terminal equipment, firstly sends the record numbers for extracting the record reports according to the requirement, and then reads the required record reports, and if the indexes are not changed, the record reports stored in the register are not changed, so that the record reports are ensured not to be lost.
The above communication methods all have the following disadvantages: when the extraction of one record report data information is finished, at least two times of interactive operation are needed to finish the extraction, if a certain link has errors in the interactive operation process, the extraction needs to be repeated, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a communication management method for preventing information interaction from being lost, which can extract the data of the report to be recorded only by one round of communication interaction operation at least, ensure the message not to be lost by a plurality of times of communication interaction when the communication is wrong, ensure the reliability of data transmission and also consider the communication efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme: a communication management method for preventing information interaction loss comprises the following steps:
the terminal equipment defines the initial address of a first register group and the initial address of a second register group for recording report data;
the monitoring host machine issues a data command for reading the first register group;
the terminal equipment responds to the record report data of the first register group;
the monitoring host receives the record report data of the first register group, carries out verification, and enters the next step if the verification is correct;
the monitoring host machine issues a data command for reading the second register group;
the terminal equipment responds to the recording report data of the second register group;
the monitoring host receives the recording report data of the second register group, carries out verification, and enters the next step if the verification is correct;
returning to the step of issuing the data command for reading the first register group by the monitoring host.
Preferably, the monitoring host receives the record report data of the first register set and performs verification, and if the verification is wrong, the monitoring host circularly issues a data command for reading the first register set until the monitoring host receives the record report data of the first register set and verifies the correctness.
Preferably, the monitoring host receives the recording report data of the second register set and performs verification, and if the verification is wrong, the monitoring host circularly issues a data command for reading the second register set until the monitoring host receives the recording report data of the second register set and verifies the correctness.
Preferably, in the step of defining the start address of the first register set and the start address of the second register set for recording the report data by the terminal device, the terminal device defines the start address of the first register set and the start address of the second register set by using a Modbus protocol.
Preferably, in the step of issuing the data command for reading the first register group by the monitoring host, a first byte of the data command indicates an address of the terminal device to be read, a second byte indicates a read command code, a third byte and a fourth byte indicate the address of the first register group, a fifth byte and a sixth byte indicate the number of registers, and a seventh byte and an eighth byte indicate a message CRC check code for issuing the command.
Preferably, in the step of the terminal device responding to the record report data of the first register group, a first byte of the record report data indicates an address of the responding terminal device, a second byte indicates a read command code, a third byte indicates a number of response bytes, bytes from a fourth byte to a third last byte indicate the record report data of the first register group, and the second last byte and the first last byte indicate a message CRC check code of the response report data.
Preferably, the monitoring host receives the record report data of the first register group, and in the step of verifying, compares whether the address of the response device is the same as the address of the command issuing device, compares whether the read command code is the same, compares whether the byte length of the record report data of the first register group is twice the number of the registers, and verifies the message CRC check code of the response report data.
Preferably, the record report data of the first register is record report information of a first event, and the record format is as follows: number, type, year, month, day, hour, minute, second, millisecond.
Preferably, the recording report data of the second register is recording report information of the occurrence of the second event, and the recording format is as follows: number, type, year, month, day, hour, minute, second, millisecond.
The technical scheme of the invention has the beneficial effects that: when the network communication is normal, the extraction of the message record data can be completed once only through one round of inquiry and response processes, the communication time is shortened, the information extraction efficiency is improved, and the communication effect is ensured; reading the record report data last time, and reading the record report data next time after verifying the record report data is correct, so as to ensure that the monitoring host can read the record report data information in the target equipment without loss, error and repetition; the extraction of the recorded report data is changed on the basis of the existing communication protocol, the confirmation retransmission mechanism of communication is realized, the software modification efficiency is improved, and the realization cost is reduced.
Drawings
FIG. 1 is a work flow diagram of one embodiment of the present invention;
FIG. 2 is a flowchart illustrating a communication operation between a monitoring host and a register set according to the prior art;
FIG. 3 is a flowchart illustrating another prior art operation of monitoring communication between a host and a register set.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1 to 3, a communication management method for preventing information interaction loss includes the following steps:
the terminal equipment defines the initial address of a first register group and the initial address of a second register group for recording report data;
the monitoring host machine issues a data command for reading the first register group;
the terminal equipment responds to the record report data of the first register group;
the monitoring host receives the record report data of the first register group, carries out verification, and enters the next step if the verification is correct;
the monitoring host machine issues a data command for reading the second register group;
the terminal equipment responds to the recording report data of the second register group;
the monitoring host receives the recording report data of the second register group, carries out verification, and enters the next step if the verification is correct;
returning to the step of issuing the data command for reading the first register group by the monitoring host.
By adopting the mode, when the network communication is normal, the extraction of the message record data can be completed once only through one round of inquiry and response processes, the communication time is shortened, the information extraction efficiency is improved, and the communication effect is ensured; reading the record report data last time, and reading the record report data next time after verifying the record report data is correct, so as to ensure that the monitoring host can read the record report data information in the target equipment without loss, error and repetition; the extraction of the recorded report data is changed on the basis of the existing communication protocol, the confirmation retransmission mechanism of communication is realized, the software modification efficiency is improved, and the realization cost is reduced.
In the application, the monitoring host receives the record report data of the first register group and verifies the record report data, and if the verification is wrong, the monitoring host circularly issues a data command for reading the first register group until the monitoring host receives the record report data of the first register group and verifies the record report data to be correct.
By verifying the record report data of the first register group and circularly reading the data command of the first register group until the correct record report data is obtained, the accuracy of the record report data is ensured, and the errors of loss, errors or repetition and the like of the record report data caused by network errors are avoided. When the network communication is abnormal, the communication is automatically switched to a retransmission process, so that the non-loss interaction of the message record data is ensured until the message record data is successfully extracted, and the next round of data extraction is automatically carried out.
Specifically, the monitoring host receives the recording report data of the second register group and performs verification, and if the verification is wrong, the monitoring host circularly issues a data command for reading the second register group until the monitoring host receives the recording report data of the second register group and verifies the correctness.
By verifying the recording report data of the second register group and circularly reading the data command of the second register group until the correct recording report data is obtained, the accuracy of the recording report data is ensured, and the errors of loss, errors or repetition and the like of the recording report data caused by network errors are avoided. When the network communication is abnormal, the communication is automatically switched to a retransmission process, so that the non-loss interaction of the message record data is ensured until the message record data is successfully extracted, and the next round of data extraction is automatically carried out.
Preferably, in the step of defining the start address of the first register set and the start address of the second register set for recording the report data by the terminal device, the terminal device defines the start address of the first register set and the start address of the second register set by using a Modbus protocol.
The Modbus protocol is adopted, so that the public publication is realized, and no copyright is required; easy to deploy and maintain; for the supplier, the bit or byte restriction of the mobile local is little modified.
In this application, in the step of issuing the data command for reading the first register group by the monitoring host, the first byte of the data command indicates the address of the terminal device to be read, the second byte indicates the read command code, the third byte and the fourth byte indicate the address of the first register group, the fifth byte and the sixth byte indicate the number of registers, and the seventh byte and the eighth byte indicate the message CRC check code for issuing the command.
Specifically, in the step of the terminal device responding to the record report data of the first register group, the first byte of the record report data represents the address of the responding terminal device, the second byte represents the read command code, the third byte represents the number of responding bytes, the bytes between the fourth byte and the third last byte represent the record report data of the first register group, and the second last byte and the first last byte represent the message CRC check code of the response report data.
Meanwhile, the monitoring host receives the record report data of the first register group and carries out verification, wherein in the step of comparing whether the address of the response equipment is the same as the address of the command issuing equipment, whether the read command code is the same, whether the byte length of the record report data of the first register group is twice of the number of the registers and checking the message CRC check code of the response report data.
According to the format requirement of the Modbus protocol, the formats of the data command and the record report data are defined, communication between the monitoring host and the terminal equipment is facilitated, after the monitoring host sends a command of reading a record report register, the terminal equipment responds to the record report data, after transmission is finished, the terminal equipment clears the sent record report and fills new record report data, and the monitoring host is guaranteed to reliably obtain the record report but cannot repeatedly obtain the same report.
Preferably, the record report data of the first register is record report information of a first event, and the record format is as follows: number, type, year, month, day, hour, minute, second, millisecond.
Preferably, the recording report data of the second register is recording report information of the occurrence of the second event, and the recording format is as follows: number, type, year, month, day, hour, minute, second, millisecond.
One embodiment of the present application:
defining: two pieces of event record report information exist in the terminal equipment, the record format is as follows (number, type, year, month, day, hour, minute, second and millisecond), and the storage format in the register is as follows:
the first one is: 01552107291532110221, respectively; information 1 occurs when the content is represented by 221 ms, 32 minutes, 11 seconds, 15 hours, 07 months, 29 days, and 21 milliseconds.
A second bar: 01AA 2107291530110111; the information 1 disappears when the content is represented by 111 ms, 30 minutes, 11 seconds, 21 years, 07 months, 29 days, 15 days.
The Modbus-RTU register address 0x2100 is defined as the start address of the first register set read for event logging reporting information, and the Modbus-RTU register address 0x2200 is defined as the start address of the second register set read for event logging reporting information.
And (3) normal communication flow:
the monitoring host sends a read event command: 0103210000058F F5, respectively;
the terminal equipment responds: 01030A 0155210729153211022196 CB;
the monitoring host receives the correct command and reads the next event command: 0103220000058F B1, respectively;
the terminal equipment responds: 01030 a 01AA 2107291530110111D 263;
and finishing the whole event extraction process.
An abnormal communication flow:
the monitoring host sends a read event command: 0103210000058F F5, respectively;
the terminal equipment responds: 01030A 0155210729153211022196 CB, when the communication process is abnormal, the monitoring host receives the 01030A 0155210729153211022196 CA, and verifies the error of the check code;
the monitoring host repeatedly sends a read event command again: 0103210000058F F5, respectively;
the terminal equipment responds: 01030A 0155210729153211022196 CB;
the monitoring host receives the correct command and reads the next event command: 0103220000058F B1, respectively;
the terminal equipment responds: 01030 a 01AA 2107291530110111D 263;
and finishing the whole event extraction process.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. A communication management method for preventing information interaction loss is characterized by comprising the following steps:
the terminal equipment defines the initial address of a first register group and the initial address of a second register group for recording report data;
the monitoring host machine issues a data command for reading the first register group;
the terminal equipment responds to the record report data of the first register group;
the monitoring host receives the record report data of the first register group, carries out verification, and enters the next step if the verification is correct;
the monitoring host machine issues a data command for reading the second register group;
the terminal equipment responds to the recording report data of the second register group;
the monitoring host receives the recording report data of the second register group, carries out verification, and enters the next step if the verification is correct;
returning to the step of issuing the data command for reading the first register group by the monitoring host.
2. The communication management method for preventing information interaction loss according to claim 1, wherein the monitoring host receives the record report data of the first register set and performs verification, and if the verification is incorrect, the monitoring host circularly issues a data command for reading the first register set until the monitoring host receives the record report data of the first register set and verifies the correctness.
3. The communication management method for preventing information interaction loss according to claim 1, wherein the monitoring host receives the recorded report data of the second register set and performs verification, and if the verification is incorrect, the monitoring host circularly issues a data command for reading the second register set until the monitoring host receives the recorded report data of the second register set and verifies the correctness.
4. The communication management method for preventing information interaction loss according to claim 1, wherein in the step of defining the start address of the first register set and the start address of the second register set for recording report data by the terminal device, the terminal device defines the start address of the first register set and the start address of the second register set by using a Modbus protocol.
5. The communication management method for preventing information interaction loss according to claim 1, wherein in the step of issuing the data command for reading the first register set by the monitoring host, a first byte of the data command represents an address of the terminal device to be read, a second byte represents a read command code, third and fourth bytes represent addresses of the first register set, fifth and sixth bytes represent the number of registers, and seventh and eighth bytes represent a message CRC code for the issued command.
6. The communication management method for preventing information interaction loss according to claim 5, wherein in the step of the terminal device responding to the recorded report data of the first register set, a first byte of the recorded report data represents an address of the responding terminal device, a second byte represents a read command code, a third byte represents a number of responding bytes, bytes from a fourth byte to a third last byte represent the recorded report data of the first register set, and the second last byte and the first last byte represent a message CRC check code of the responded report data.
7. The communication management method for preventing information interaction loss according to claim 6, wherein the monitoring host receives the record report data of the first register group, and in the step of performing verification, compares whether the address of the responder is the same as the address of the command issuing device, compares whether the read command code is the same, compares whether the byte length of the record report data of the first register group is twice the number of registers, and verifies the message CRC check code of the response report data.
8. The communication management method for preventing information interaction loss according to claim 1, wherein the record report data of the first register is record report information of a first event, and the record format is: number, type, year, month, day, hour, minute, second, millisecond.
9. The communication management method for preventing information interaction loss according to claim 1, wherein the logging report data of the second register is logging report information of a second event, and the logging format is: number, type, year, month, day, hour, minute, second, millisecond.
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