CN116016011B - Master-slave communication method and system based on RS485 bus - Google Patents
Master-slave communication method and system based on RS485 busInfo
- Publication number
- CN116016011B CN116016011B CN202211438451.4A CN202211438451A CN116016011B CN 116016011 B CN116016011 B CN 116016011B CN 202211438451 A CN202211438451 A CN 202211438451A CN 116016011 B CN116016011 B CN 116016011B
- Authority
- CN
- China
- Prior art keywords
- field
- real
- data
- time
- station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Small-Scale Networks (AREA)
Abstract
The invention provides a master-slave communication method and a master-slave communication system based on an RS485 bus, belonging to the technical field of industrial network control, wherein the method comprises the following steps of S10, setting a master station request frame format, a slave station response frame format and field priority; the method comprises the steps of S20, generating a data acquisition request by a master station based on a master station request frame format and a field priority, and sending the data acquisition request to a corresponding slave station based on an RS485 bus, S30, receiving and analyzing the data acquisition request by the slave station, acquiring a real-time field parameter, an extension field parameter and a first check code, checking the real-time field parameter and the extension field parameter by the first check code, and generating real-time field data and extension field data by the slave station based on the real-time field parameter and the extension field parameter, and generating a data response based on the real-time field data, the extension field data and the response frame format of the slave station and sending the data response to the master station. The invention has the advantages of greatly improving the real-time performance, expansibility and reliability of master-slave communication.
Description
Technical Field
The invention relates to the technical field of industrial network control, in particular to a master-slave communication method and system based on an RS485 bus.
Background
The industrial network is generally controlled by adopting a MODBUS-RTU protocol based on an RS485 bus, the RS485 interface has higher noise suppression capability by adopting a differential transmission mode, the maximum transmission distance is about 1200 meters, the maximum transmission rate is 10Mb/s, and the industrial network also supports multi-point and two-way communication, so that a large number of industrial equipment is used as a standard interface, the MODBUS-RTU protocol is a master-slave protocol, only one master station and a plurality of slave stations can be arranged on the bus at the same moment, the Modbus communication is always initiated by the master station, data cannot be sent when the slave stations do not receive a request from the master station, the slave stations cannot communicate with each other, and the master station can only start one Modbus transaction at one time.
Based on the characteristics, the MODBUS-RTU protocol based on the RS485 bus can only adopt a one-to-one communication mode, namely, the master station inquires the state of the slave station at fixed time, and the slave station replies corresponding data after receiving a polling command of the master station, but has the following defects:
1. When a larger data volume (or average traffic volume is low but burst) needs to be transmitted, the master station requests data to the corresponding slave station through the RS485 bus, the number of data packets transmitted by the slave station is large and the speed is high, the data packets received by the master station at the same moment can exceed the bandwidth of the RS485 bus and possibly cause communication sticky packets, so that communication response errors are caused, the communication reliability is directly influenced, 2, the industrial field environment is bad and is limited by the field environment and the complexity of the application occasion of the RS485 bus, the communication bandwidth of the RS485 bus cannot be infinitely improved, for example, a network formed by the RS485 bus can only be serially wired, the practical wiring design and construction of the complex occasion can be greatly difficult, the practical communication bandwidth is influenced, the MODBUS-RTU protocol can only process 247 addresses on one data link, and the number of slave stations which can be connected to the master station is limited.
Therefore, how to provide a master-slave communication method and system based on an RS485 bus, so as to improve the real-time performance, expansibility and reliability of master-slave communication, becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing a master-slave communication method and a master-slave communication system based on an RS485 bus, which can improve the real-time performance, expansibility and reliability of master-slave communication.
In a first aspect, the present invention provides a master-slave communication method based on an RS485 bus, including the following steps:
step S10, a request frame format of a master station, a response frame format of a slave station and a field priority are set;
Step S20, the master station generates a data acquisition request based on the master station request frame format and the field priority, and sends the data acquisition request to a corresponding slave station based on an RS485 bus;
step S30, the slave station receives and analyzes the data acquisition request, acquires real-time field parameters, extension field parameters and first check codes, and checks the real-time field parameters and the extension field parameters by using the first check codes;
and step S40, the secondary station generates real-time field data and extension field data based on the real-time field parameters and the extension field parameters, generates a data response based on the real-time field data, the extension field data and the secondary station response frame format, and sends the data response to the primary station to complete communication between the primary station and the secondary station.
Further, in the step S10, the master station request frame format includes a slave station address, a function code, first data and a first check code, and the slave station response frame format includes a slave station address, a function code, second data and a second check code;
The secondary station address has a length of 1 byte, the function code has a length of 1 byte, the first data and the second data have a length range of 0 to 252 bytes, the first check code and the second check code have a length of 2 bytes, the first data comprise a real-time field starting address, a real-time field number, an extension field starting address and an extension field number, the real-time field number is larger than the extension field number, the second data comprise a real-time field reading byte number, a real-time field value, an extension field reading byte number and an extension field number value, and the first check code and the second check code are CRC16 calculated values of the first data and the second data respectively;
The field priority distinguishes whether the field type is a real-time field or an extension field.
Further, the step S20 specifically includes:
The master station distinguishes the field type of the field to be acquired based on the field priority, generates a data acquisition request based on the master station request frame format and the field type, and sends the data acquisition request to the corresponding slave station based on an RS485 bus.
Further, the step S30 specifically includes:
The secondary station receives and analyzes the data acquisition request, acquires real-time field parameters including real-time field start addresses and real-time field quantity, extension field parameters including extension field start addresses and extension field quantity and first check codes, calculates CRC16 of the real-time field parameters and the extension field parameters to obtain third check codes, judges whether the third check codes are equal to the first check codes or not, if so, the check is successful, and enters into step S40, if not, the check is failed, and the flow is ended.
Further, the step S40 specifically includes:
Based on the real-time field parameters and the extension field parameters, the secondary station generates real-time field data comprising the real-time field reading byte number and the real-time field value and extension field data comprising the extension field reading byte number and the extension field value, and performs CRC16 calculation on the real-time field data and the extension field data to obtain a second check code;
And generating a data response based on the real-time field data, the extension field data, the second check code and the response frame format of the slave station, and transmitting the data response to the master station based on an RS485 bus to complete communication between the master station and the slave station.
In a second aspect, the present invention provides a master-slave communication system based on an RS485 bus, including the following modules:
The format setting module is used for setting a master station request frame format, a slave station response frame format and a field priority;
The data acquisition request sending module is used for generating a data acquisition request by the master station based on the master station request frame format and the field priority, and sending the data acquisition request to a corresponding slave station based on an RS485 bus;
The data acquisition request verification module is used for receiving and analyzing the data acquisition request from the station, acquiring real-time field parameters, extension field parameters and first verification codes, and verifying the real-time field parameters and the extension field parameters by utilizing the first verification codes;
And the data response transmitting module is used for generating real-time field data and extension field data based on the real-time field parameters and the extension field parameters by the secondary station, generating a data response based on the real-time field data, the extension field data and the secondary station response frame format and transmitting the data response to the primary station to complete communication between the primary station and the secondary station.
Further, in the format setting module, the master station request frame format comprises a slave station address, a function code, first data and a first check code, and the slave station response frame format comprises a slave station address, a function code, second data and a second check code;
The secondary station address has a length of 1 byte, the function code has a length of 1 byte, the first data and the second data have a length range of 0 to 252 bytes, the first check code and the second check code have a length of 2 bytes, the first data comprise a real-time field starting address, a real-time field number, an extension field starting address and an extension field number, the real-time field number is larger than the extension field number, the second data comprise a real-time field reading byte number, a real-time field value, an extension field reading byte number and an extension field number value, and the first check code and the second check code are CRC16 calculated values of the first data and the second data respectively;
The field priority distinguishes whether the field type is a real-time field or an extension field.
Further, the data acquisition request sending module is specifically configured to:
The master station distinguishes the field type of the field to be acquired based on the field priority, generates a data acquisition request based on the master station request frame format and the field type, and sends the data acquisition request to the corresponding slave station based on an RS485 bus.
Further, the data acquisition request verification module is specifically configured to:
The secondary station receives and analyzes the data acquisition request, acquires real-time field parameters comprising real-time field start addresses and real-time field quantity, extension field parameters comprising extension field start addresses and extension field quantity and first check codes, calculates CRC16 of the real-time field parameters and the extension field parameters to obtain third check codes, judges whether the third check codes are equal to the first check codes or not, if so, the check is successful, the secondary station enters a data response transmitting module, if not, the check is failed, and the flow is ended.
Further, the data response sending module is specifically configured to:
Based on the real-time field parameters and the extension field parameters, the secondary station generates real-time field data comprising the real-time field reading byte number and the real-time field value and extension field data comprising the extension field reading byte number and the extension field value, and performs CRC16 calculation on the real-time field data and the extension field data to obtain a second check code;
And generating a data response based on the real-time field data, the extension field data, the second check code and the response frame format of the slave station, and transmitting the data response to the master station based on an RS485 bus to complete communication between the master station and the slave station.
The invention has the advantages that:
The field type of the field to be acquired is divided into a real-time field and an extension field by setting the format of the request frame of the master station, the format of the response frame of the slave station and the field priority, the real-time field is queried in real time, the extension field is queried in a polling way, the length of the total transmission frame (data acquisition request and data response) is further shortened, the communication period is shortened, the message transmission efficiency is improved, communication response errors caused by communication sticking are avoided, the extension field can be set as required, and the real-time performance, the expansibility and the reliability of master-slave communication are improved greatly finally.
Drawings
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
Fig. 1 is a flow chart of a master-slave communication method based on an RS485 bus.
Fig. 2 is a schematic structural diagram of a master-slave communication system based on an RS485 bus according to the invention.
Fig. 3 is a schematic flow chart of the interaction of the master station and the slave station of the present invention.
Fig. 4 is a signaling diagram of the interaction of the master and slave stations of the present invention.
Detailed Description
The technical scheme of the embodiment of the application has the general idea that the field types of the field to be acquired are divided into a real-time field and an extension field, the real-time field is queried in real time, the extension field is queried in a polling way to shorten the length of a total transmission frame, avoid communication from sticking packets, and the extension field can be set as required to improve the real-time performance, expansibility and reliability of master-slave communication.
Referring to fig. 1 to 4, a preferred embodiment of a master-slave communication method based on an RS485 bus according to the present invention includes the following steps:
step S10, a request frame format of a master station, a response frame format of a slave station and a field priority are set;
Step S20, the master station generates a data acquisition request based on the master station request frame format and the field priority, and sends the data acquisition request to a corresponding slave station based on an RS485 bus, namely the master station divides a field to be acquired into a real-time field and an expansion field based on the field priority, simultaneously carries out real-time query on each real-time field, and carries out polling query on each expansion field in sequence;
step S30, the slave station receives and analyzes the data acquisition request, acquires real-time field parameters, extension field parameters and first check codes, and checks the real-time field parameters and the extension field parameters by using the first check codes;
and step S40, the secondary station generates real-time field data and extension field data based on the real-time field parameters and the extension field parameters, generates a data response based on the real-time field data, the extension field data and the secondary station response frame format, and sends the data response to the primary station to complete communication between the primary station and the secondary station.
In the step S10, the master station request frame format includes a slave station address, a function code, first data and a first check code, and the slave station response frame format includes a slave station address, a function code, second data and a second check code;
The secondary station address has a length of 1 byte, the function code has a length of 1 byte, the first data and the second data have a length ranging from 0 to 252 bytes, the first check code and the second check code have a length of 2 bytes, the first data comprises a real-time field starting address, a real-time field number, an extended field starting address and an extended field number, the real-time field number is larger than the extended field number so as to ensure real-time performance, the second data comprises a real-time field reading byte number, a real-time field value, an extended field reading byte number and an extended field value, and the first check code and the second check code are CRC16 calculated values of the first data and the second data respectively;
The field priority distinguishes whether the field type is a real-time field or an extension field.
The frame format of the conventional MODBUS-RTU protocol does not distinguish between the real-time field and the extension field, and the format is as follows:
| secondary station address | Function code | Data | CRC check |
| 1 Byte | 1 Byte | 0-252 Bytes | 2 Bytes |
The step S20 specifically includes:
The master station distinguishes the field type of the field to be acquired based on the field priority, generates a data acquisition request based on the master station request frame format and the field type, and sends the data acquisition request to the corresponding slave station based on an RS485 bus. The data acquisition request only queries one field at a time, namely the data acquisition request only queries one field with the field type being an extension field, so as to ensure the real-time performance of communication, for example, the real-time performance requirements of fields such as voltage, current and the like are higher, the real-time query is required, and the real-time performance requirements of the fields such as temperature, capacity and energy are not high, the polling query can be performed, namely the temperature is queried only for the first time, the capacity is queried only for the second time, and the like.
The step S30 specifically includes:
The secondary station receives and analyzes the data acquisition request, acquires real-time field parameters including real-time field start addresses and real-time field quantity, extension field parameters including extension field start addresses and extension field quantity and first check codes, calculates CRC16 of the real-time field parameters and the extension field parameters to obtain third check codes, judges whether the third check codes are equal to the first check codes or not, if so, the check is successful, and enters into step S40, if not, the check is failed, and the flow is ended.
The step S40 specifically includes:
Based on the real-time field parameters and the extension field parameters, the secondary station generates real-time field data comprising the real-time field reading byte number and the real-time field value and extension field data comprising the extension field reading byte number and the extension field value, and performs CRC16 calculation on the real-time field data and the extension field data to obtain a second check code;
And generating a data response based on the real-time field data, the extension field data, the second check code and the response frame format of the slave station, and transmitting the data response to the master station based on an RS485 bus to complete communication between the master station and the slave station.
The invention relates to a preferred embodiment of a master-slave communication system based on an RS485 bus, which comprises the following modules:
The format setting module is used for setting a master station request frame format, a slave station response frame format and a field priority;
The data acquisition request sending module is used for generating a data acquisition request by the master station based on the master station request frame format and the field priority, and sending the data acquisition request to a corresponding slave station based on an RS485 bus, namely, the master station divides a field to be acquired into a real-time field and an extension field based on the field priority, simultaneously carries out real-time inquiry on each real-time field, and carries out polling inquiry on each extension field in sequence;
The data acquisition request verification module is used for receiving and analyzing the data acquisition request from the station, acquiring real-time field parameters, extension field parameters and first verification codes, and verifying the real-time field parameters and the extension field parameters by utilizing the first verification codes;
And the data response transmitting module is used for generating real-time field data and extension field data based on the real-time field parameters and the extension field parameters by the secondary station, generating a data response based on the real-time field data, the extension field data and the secondary station response frame format and transmitting the data response to the primary station to complete communication between the primary station and the secondary station.
The format setting module is used for setting a format of a request frame of a master station, wherein the format of the request frame of the master station comprises a slave station address, a function code, first data and a first check code;
The secondary station address has a length of 1 byte, the function code has a length of 1 byte, the first data and the second data have a length ranging from 0 to 252 bytes, the first check code and the second check code have a length of 2 bytes, the first data comprises a real-time field starting address, a real-time field number, an extended field starting address and an extended field number, the real-time field number is larger than the extended field number so as to ensure real-time performance, the second data comprises a real-time field reading byte number, a real-time field value, an extended field reading byte number and an extended field value, and the first check code and the second check code are CRC16 calculated values of the first data and the second data respectively;
The field priority distinguishes whether the field type is a real-time field or an extension field.
The frame format of the conventional MODBUS-RTU protocol does not distinguish between the real-time field and the extension field, and the format is as follows:
| secondary station address | Function code | Data | CRC check |
| 1 Byte | 1 Byte | 0-252 Bytes | 2 Bytes |
The data acquisition request sending module is specifically configured to:
The master station distinguishes the field type of the field to be acquired based on the field priority, generates a data acquisition request based on the master station request frame format and the field type, and sends the data acquisition request to the corresponding slave station based on an RS485 bus. The data acquisition request only queries one field at a time, namely the data acquisition request only queries one field with the field type being an extension field, so as to ensure the real-time performance of communication, for example, the real-time performance requirements of fields such as voltage, current and the like are higher, the real-time query is required, and the real-time performance requirements of the fields such as temperature, capacity and energy are not high, the polling query can be performed, namely the temperature is queried only for the first time, the capacity is queried only for the second time, and the like.
The data acquisition request verification module is specifically configured to:
The secondary station receives and analyzes the data acquisition request, acquires real-time field parameters comprising real-time field start addresses and real-time field quantity, extension field parameters comprising extension field start addresses and extension field quantity and first check codes, calculates CRC16 of the real-time field parameters and the extension field parameters to obtain third check codes, judges whether the third check codes are equal to the first check codes or not, if so, the check is successful, the secondary station enters a data response transmitting module, if not, the check is failed, and the flow is ended.
The data response transmitting module is specifically configured to:
Based on the real-time field parameters and the extension field parameters, the secondary station generates real-time field data comprising the real-time field reading byte number and the real-time field value and extension field data comprising the extension field reading byte number and the extension field value, and performs CRC16 calculation on the real-time field data and the extension field data to obtain a second check code;
And generating a data response based on the real-time field data, the extension field data, the second check code and the response frame format of the slave station, and transmitting the data response to the master station based on an RS485 bus to complete communication between the master station and the slave station.
To facilitate an understanding of the present invention, the following are examples of master and slave interactions:
when a host initiates a data acquisition request, a slave communicates in real time according to a master station request frame format and a slave station response frame format to ensure that a data response returned to the host accords with a MODBUS-RTU protocol, and the method specifically comprises the following steps:
s001 [ voltage 1, voltage 2, current ] [ expansion 1: temperature ]
S002: [ Voltage 1, voltage 2, current ] [ expansion 2: capacity ]
...
SOOn [ Voltage 1, voltage 2, current ] [ expansion n: energy ]
Wherein, voltage 1, voltage 2 and current are real-time fields, each round of inquiry reply process should contain the fields, and temperature, capacity and energy are expansion fields. When the master station inquires the non-real-time fields, only 1 expansion field is inquired in each round (the actual application configures the number of the expansion fields according to the needs), and the inquiry is restarted after the n-theory inquiry is finished.
When the data acquisition request sent by the host is a register inquiry request, the first round of inquiry request may be that the ID of the host is 1 (corresponding to byte Ox 01), the real-time field and the extension field are respectively read (the function code is 0x 03), the real-time fields [ voltage 1], [ voltage 2] and [ current ] to be read are assumed to be continuous data stored in three registers, the start address Ox00 x01, the extension field [ temperature ], [ capacity ] and the energy start address are respectively 0x00 0x10,0x00 0x11,0x00 0x12.
In the S001 process, the data acquisition request sent by the host is "0x01 0x03 0x00 0x01 0x00 0x03 0x00 0x10 0x00 0x01 0x x0 x", where the meaning of the data acquisition request is "3 consecutive register data (real-time fields [ voltage 1], [ voltage 2], [ current ]) beginning with 0x00 x01 address to be read and 1 register data (extension field [ temperature ]) beginning with 0x00 x10, and the last two bytes are check codes calculated by CRC 16.
Similarly, the data acquisition request sent by the host in the S002 process is "Ox01 0x03 0x00 0x01 0x00 0x03 0x00 0x11 0x00 0x01 0x x0 x", where the meaning of the data acquisition request is "3 consecutive register data (real-time fields [ voltage 1], [ voltage 2], [ current ]) beginning with 0x00 x01 address to be read and 1 register data (extension field [ capacity ]) beginning with 0x00 x11, and the last two bytes are check codes calculated by CRC 16.
When the data response sent by the slave machine is a register data reply instruction, the data of [ voltage 1], [ voltage 2], [ current ] in the first round of reply instruction are respectively '0 x1E 0x 1F', '0 x2E 0x 2F', '0 x3E 0x 3F', the data of the extension field [ temperature ] is '0 x4E 0x 4F', the instruction can be '0x01 0x03 0x06 0x1E 0x1F 0x2E 0x2F 0x3E 0x3F 0x02 0x4E 0x4F 0x x0 x', '0 x 06' is the byte number of the read real-time field, the total number of the 3 real-time field registers is 6 bytes, the '0x1E 0x1F 0x2E 0x2F 0x3E 0x3F' is the real-time field data, the '0 x 02' is the byte number of the read extension field, the total number of the 1 extension field registers is 2 bytes, and the '0 x4E 0x 4F' is the extension field data.
Similarly, in the second round of instruction, the [ voltage 1], [ voltage 2], [ current ] data are respectively "0×5e0x5f", "0×6e0x6f", "Ox7E 0x7F", and the data of the extension field [ capacity ] is "0×8e0x8f", and then the instruction may be "0x01 0x03 0x06 0x5E 0x5F 0x6E 0x6F 0x7E 0x7F 0x02 0x8E 0x8F 0x ×0xx", "0x06" is the byte number of the read real-time field, the total number of 3 real-time field registers is 6 bytes, the "0x5E 0x5F 0x6E 0x6F 0x7E 0x7F" is the real-time field data, the "0x02" is the byte number of the read extension field, the total number of 1 extension field registers is 2 bytes, and the "0×8e0x8f" is the extension field data.
The S00n process polling is analogized based on the above, and it should be noted that none of the above applied register addresses can be repeated, otherwise the transferred register values will be confused.
In summary, the invention has the advantages that:
The field type of the field to be acquired is divided into a real-time field and an extension field by setting the format of the request frame of the master station, the format of the response frame of the slave station and the field priority, the real-time field is queried in real time, the extension field is queried in a polling way, the length of the total transmission frame (data acquisition request and data response) is further shortened, the communication period is shortened, the message transmission efficiency is improved, communication response errors caused by communication sticking are avoided, the extension field can be set as required, and the real-time performance, the expansibility and the reliability of master-slave communication are improved greatly finally.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211438451.4A CN116016011B (en) | 2022-11-16 | 2022-11-16 | Master-slave communication method and system based on RS485 bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211438451.4A CN116016011B (en) | 2022-11-16 | 2022-11-16 | Master-slave communication method and system based on RS485 bus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116016011A CN116016011A (en) | 2023-04-25 |
| CN116016011B true CN116016011B (en) | 2025-09-16 |
Family
ID=86036081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211438451.4A Active CN116016011B (en) | 2022-11-16 | 2022-11-16 | Master-slave communication method and system based on RS485 bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116016011B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404181A (en) * | 2015-10-20 | 2016-03-16 | 卧龙电气集团股份有限公司 | Multifunctional communication method for integrated variable frequency motor |
| CN111478838A (en) * | 2020-04-08 | 2020-07-31 | 浙江中控研究院有限公司 | High-efficiency high-bandwidth communication method and system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546467B (en) * | 2013-10-23 | 2016-08-17 | 上海爱控自动化设备有限公司 | The method applying Modbus rtu protocol on TCP/IP network |
| US11343117B2 (en) * | 2017-08-08 | 2022-05-24 | Volkswagen Aktiengesellschaft | Method for transmitting data via a serial communication bus, correspondingly designed bus interface, and correspondingly designed computer program |
| CN110716977A (en) * | 2019-10-17 | 2020-01-21 | 广东绿腾新能源服务有限公司 | Energy data linking method and device based on block chain |
| CN112503717B (en) * | 2020-11-02 | 2022-04-08 | 珠海格力电器股份有限公司 | Control method and device of universal air conditioner controller and universal air conditioner controller |
-
2022
- 2022-11-16 CN CN202211438451.4A patent/CN116016011B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404181A (en) * | 2015-10-20 | 2016-03-16 | 卧龙电气集团股份有限公司 | Multifunctional communication method for integrated variable frequency motor |
| CN111478838A (en) * | 2020-04-08 | 2020-07-31 | 浙江中控研究院有限公司 | High-efficiency high-bandwidth communication method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116016011A (en) | 2023-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108965484B (en) | Internet of things data transmission method, system and terminal | |
| CN110177013B (en) | A Design and Implementation Method of EtherCAT Master-Slave Station Based on FPGA | |
| CN112995133B (en) | Analysis method, device and system based on modbus protocol | |
| CA2362961C (en) | Bridge for can to tcp/ip connection | |
| EP2618544A1 (en) | Ethernet communication system and method based on mmc/sd interface | |
| CN113741360B (en) | Industrial control gateway, system, control method and storage medium | |
| EP4184831A1 (en) | Data collection method and apparatus, modbus system, and storage medium | |
| CN111464419A (en) | A data transmission control method based on bus network communication | |
| JP2019534609A (en) | Network management information receiving / transmitting method, apparatus, transmitting apparatus, and receiving apparatus | |
| EP3422655B1 (en) | Method for managing address of meter device, and acquisition terminal and meter device | |
| CN118158020A (en) | Communication system based on Modbus protocol | |
| CN112491620B (en) | Multi-channel data transmission controller based on SRIO and adjusting method | |
| CN117596313A (en) | Multi-protocol acquisition method for Internet of things system | |
| CN116016011B (en) | Master-slave communication method and system based on RS485 bus | |
| CN106953809B (en) | 485 time-sharing communication-based equipment resource acquisition method | |
| CN118413583B (en) | IPMI protocol rapid transmission method and related equipment | |
| CN118210751B (en) | Communication method of BMS protocol based on two-in-one of CAN and RS485 bus | |
| CN110768749A (en) | Data transmission method and device and power peak shaving system | |
| CN113938351A (en) | Data acquisition method, system and computer readable storage medium | |
| WO2012111229A1 (en) | Communication system | |
| CN103780412B (en) | Realization method and apparatus for virtual southbound interface and internet of thing management platform | |
| CN117424774A (en) | Communication anti-interference method and device, electronic equipment and storage medium | |
| CN120528733B (en) | A method and apparatus for communication between a coupler and a host computer for hot parameter configuration. | |
| US20180191562A1 (en) | Parameter setting method for system bus and device thereof | |
| CN115633102A (en) | Multi-type protocol message processing system, method and readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |