CN116032694A - Real-time block data reading method based on industrial Internet of things gateway - Google Patents
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Abstract
The invention discloses a real-time block data reading method based on an industrial Internet of things gateway, which comprises the steps of firstly determining the type of a protocol, then merging point location information according to different types of point location information and the maximum byte number which can be read at one time and is specified by the type of the protocol so as to initialize a point location block, then assembling a corresponding command frame according to the register type of the point location block and the access range of a device data address by a device protocol module in the industrial Internet of things gateway, sending the command frame to industrial equipment, receiving a response message of the industrial equipment, extracting a data set from the response message by the industrial Internet of things gateway, and finally extracting data corresponding to the point location from the data set by the industrial Internet of things gateway. The method can realize a quick and efficient communication mode to provide millisecond-level real-time data for factories.
Description
Technical Field
The invention relates to a block reading method based on an industrial Internet of things gateway.
Background
In the process of factory digital application, a digital interface is added for equipment through an industrial Internet of things gateway, equipment data are collected in real time through the digital interface, and the collected equipment data are reported to a factory digital application system. The digital application of a large number of factories (such as digital twin of the factories, production line monitoring and the like) needs millisecond-level data acquisition performance, acquires equipment data in real time and timely feeds back.
The traditional industrial Internet of things has low data acquisition performance, and adopts a method of polling and reading point by point; because the data to be collected in the factory digital application is very much, the data collected by one industrial Internet of things can be thousands or even tens of thousands, and the traditional method for polling and reading point by point can take up to several seconds or even tens of seconds to collect, so that the factory digital application requirement can not be met.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides the block-based reading method based on the industrial Internet of things gateway, which can greatly improve the data acquisition performance of the industrial Internet of things gateway, and can improve the data acquisition capacity of the traditional industrial Internet of things gateway from the second level to the millisecond level, thereby helping the factory digital application to instantly sense potential faults and avoiding the occurrence of the faults.
The technical scheme is as follows: in order to achieve the above purpose, the invention adopts the following technical scheme:
a method for reading according to blocks based on industrial Internet of things gateway includes determining type of protocol first, merging point location information according to different types of point location information and maximum byte number which can be read at one time and is specified by type of protocol to initialize point location block, then assembling corresponding command frame by device protocol module in industrial Internet of things gateway according to register type of point location block and access range of device data address to send command frame to industrial device, receiving response message of industrial device, then extracting data set from response message by industrial Internet of things gateway, and finally extracting data corresponding to point location from data set by industrial Internet of things gateway.
Specifically, the method comprises the following steps:
s1, starting a configuration analysis module of an edge computing gateway to analyze point location information in a configuration file issued from an internet middleware, wherein the point location information comprises a register address and a register type;
s2, system for computing gateway at edgeOpening up a continuous address space in memoryHFor storing point location information;
s3, classifying the point location information according to the register type for all the point location information from the same industrial equipment, and classifying the point location information with the same register type into one type;
s4, initializing variablesW= -1, selecting an unprocessed point location information, and entering step S5;
s5, obtaining that the address value of a register in the point location information is larger than a variableWIs the minimum register address of (a): if the minimum register address exists, marking the minimum register address asXDetermining slave register addresses based on the maximum number of bytes that can be read at one time specified by the type of protocolXStarting the maximum register address that can be readYStep S6 is entered; otherwise, returning to the step S4 until the processing of all the category point location information is completed, and entering into a step S9;
s6, initializing variablesZ-1 for storing the actual maximum address value that one protocol frame needs to access;
s7, traversing the register addresses in the point location information of the classX～YA value of a maximum register address within the range and assigning the value of the maximum register address to the variableZObtaining the actual address range which is needed to be obtained by the protocol frame corresponding to the point bit blockX～Z；
S8, finishing initialization of a point bit block, taking the register type of the point information as the register type of the point bit block, andX～Zsaving the variable as a device data address access range in a device protocol moduleYValue assignment of (2) to variablesWReturning to the step S5;
s9, starting an equipment protocol module of the edge computing gateway, assembling a corresponding command frame according to the point block information, sending the command frame to the industrial equipment, receiving a response message of the industrial equipment, acquiring a data set from the response message, and finally extracting data of a corresponding point from the acquired data set by the equipment protocol module;
s10, assembling data of the corresponding points into a JSON format file and reporting the JSON format file to the middleware of the Internet of things.
Specifically, after the middleware of the Internet of things issues the configuration file to the industrial Internet of things gateway, the industrial Internet of things gateway firstly stores the configuration file to the local, and then starts a configuration analysis module to analyze the configuration file to obtain the type of the protocol and all point location information; and sending all the point location information belonging to the same industrial equipment to a block-by-block reading initialization module by taking the industrial equipment as a unit, and combining the point location information by the block-by-block reading initialization module according to the maximum byte number which can be read at one time and is specified by different types of point location information and types of protocols, and initializing a point location block.
Specifically, the configuration parsing module obtains the type of the protocol by calling a cjson library.
Specifically, after the configuration analysis module obtains the type of the protocol, the configuration analysis module obtains parameters including a communication port and a register address based on the corresponding protocol.
Specifically, the configuration analysis module calls the cjson library again to obtain the point location information after obtaining the type of the protocol and the parameters including the communication port and the register address.
Specifically, if the industrial Internet of things gateway and the industrial equipment communicate through a network port, firstly, an Ethernet connection is established, and then a corresponding protocol processing module is called according to the type of a protocol to realize the transmission of command frames; if the industrial Internet of things gateway and the industrial equipment are communicated through the serial port, after the industrial Internet of things gateway serial port is initialized, a corresponding protocol processing module is directly called according to the type of the protocol, and command frame transmission is achieved through the industrial Internet of things gateway serial port. .
The beneficial effects are that: compared with the prior art, the block reading method based on the industrial Internet of things gateway has the following advantages: 1. the industrial Internet of things gateway realizes millisecond-level data acquisition, so that the working attribute of the industrial Internet of things gateway is comprehensively improved, the time delay of data acquisition and data statistics is reduced, more timely technical support is provided for scientific decision, and timely work management and control are convenient to carry out; 2. the data acquisition efficiency is greatly improved, and the method has a good effect on knowing the operation efficiency and the state of the equipment and can be used for carrying out instant monitoring; 3. the efficient data acquisition capability can reflect errors and faults in time, so that fault monitoring and fault diagnosis can be conveniently and timely carried out, and accidents are prevented.
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FIG. 1 is a schematic diagram of information interaction between an industrial Internet of things gateway and an Internet of things middleware;
FIG. 2 is a schematic diagram of a workflow of a configuration parsing module in an industrial Internet of things gateway;
FIG. 3 is a flow chart of an implementation of a block-wise read method for an industrial Internet of things gateway.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
A block reading method based on an industrial Internet of things gateway can realize a rapid and efficient communication mode to provide millisecond-level real-time data for factories; firstly determining the type of a protocol, then merging point location information according to the point location information of different types and the maximum byte number which can be read at one time and is specified by the type of the protocol so as to initialize a point location block, then assembling a corresponding command frame according to the register type of the point location block and the access range of a device data address by a device protocol module in an industrial Internet of things gateway, sending the command frame to industrial equipment, receiving a response message of the industrial equipment, extracting a data set from the response message by the industrial Internet of things gateway, and finally extracting data corresponding to the point location from the data set by the industrial Internet of things gateway.
The implementation of the solution according to the invention is specifically described below with an example.
The method comprises the steps that data relevant information to be collected by an industrial Internet of things gateway is configured through a data configuration module of an Internet of things middleware, so that a configuration file is formed; in connection with fig. 1, the profile is formed as follows:
s11, in a configuration page of the middleware of the Internet of things: selecting gateway configuration, selecting device configuration, and selecting adding device; selecting a connection port, selecting a LAN port, selecting a device model modbusTCP, setting an IP address as 192.168.2.123, setting a port number as 502, and setting a station number as 1;
s12, selecting an addition variable to set an operation type as read-only, setting a data type as 16-bit unsigned number, setting decimal 0, setting a reading function code as a reading holding register, and setting an address of the holding register as 1;
s13, repeating the step S12, and adding ten continuous holding register addresses 1-10 in total to form a configuration file;
s14, the middleware of the Internet of things issues configuration files to the gateway of the industrial Internet of things.
After the middleware of the Internet of things issues the configuration file to the industrial Internet of things gateway, the industrial Internet of things gateway firstly stores the configuration file to the local, and then starts a configuration analysis module to analyze the configuration file to obtain the type of the protocol and all point location information; and sending all the point location information belonging to the same industrial equipment to a block-by-block reading initialization module by taking the industrial equipment as a unit. With reference to fig. 2, the working procedure of the configuration parsing module is as follows:
s21, calling a cjson library API to acquire a type of a protocol which is modbusTCP protocol;
s22, calling a modbusTCP equipment configuration analysis API to acquire connection parameters such as an IP address, a communication port number and the like;
s23, calling a modbusTCP variable configuration analysis API to acquire communication parameters such as register addresses, byte sequences and the like;
s24, calling a cjson library to obtain point location information.
After all the point location information is resolved, the industrial Internet of things gateway sends all the point location information belonging to the same industrial equipment to a block-by-block reading initialization module, and the block-by-block reading initialization module performs combination of the point location information according to the maximum byte number which can be read at one time and is specified by different types of the point location information and the types of protocols, and initializes the point location block. With reference to fig. 3, the operation of the block-wise read initialization module is as follows:
s31, the same industrial equipment and the same point location block are all holding registers;
s32, acquiring a minimum register address as 1;
s33, since the modbusTCP message prescribes that the maximum number of bytes which can be read at one time is 240 bytes, namely 120 holding registers; the maximum register address that the modbusTCP protocol can read from register address 1 is 120;
s34, acquiring all point location information in the range from the register address 1 to the register address 120;
s35, obtaining the access range of the device data address read by the device protocol module as a register address 1 to a register address 10;
s36, a starting device protocol module initializes an industrial Internet of things LAN port, and invokes a modbusTCP protocol library API to establish connection with industrial devices;
s37, calling a modbusTCP protocol library API, assembling a command frame according to information of all points in the range from the register address 1 to the register address 10, and sending the command frame to ModbusTCP equipment;
s38, the ModbusTCP equipment responds to the command frame and generates a response message, and the equipment protocol module receives the response message and extracts the data set;
s39, mapping relation between point location information and a data set is as follows: (point location address-data set starting address) ×2 is the mapping starting address of each point location in the data set, and accordingly, the data corresponding to the point location is obtained;
s310, assembling data of the corresponding points into a JSON format file and reporting the JSON format file to the middleware of the Internet of things.
Compared with the traditional point-by-point reading mode, the block-by-block reading method is more reasonable and efficient, and takes a modbus serial port communication protocol as an example, the baud rate 9600, the 1 bit of the start bit is fixed, the check is not performed, and the 1 bit and the 8 bit data bit of the stop bit are provided; if 14 bytes are to be interacted with to read one holding register, these times are 14× (1+8+1)/9600=14.6 ms, 1.46s are required when 100 holding registers are read one by one; while the use of 100 holding registers to interact 212 bytes with a block-wise read requires these times 212× (1+8+1)/9600=221 ms, in this case at a block-wise read speed of about 6.6 times that of a read-by-block.
The 100 holding registers to interact 212 words are calculated according to the modbusRTU protocol: firstly, the industrial Internet of things sends a command frame message (1 byte slave address+1 byte function code+2 byte register start address+2 bytes register number to be read+2 byte check codes), and then the industrial equipment replies data (one saved register 2 bytes) +2 byte check codes) of byte number of response message (1 byte slave address+1 byte function code+2×register data amount) for 212 bytes in total.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.
Claims (7)
1. A block reading method based on an industrial Internet of things gateway is characterized by comprising the following steps of: firstly determining the type of a protocol, then merging point location information according to the point location information of different types and the maximum byte number which can be read at one time and is specified by the type of the protocol so as to initialize a point location block, then assembling a corresponding command frame according to the register type of the point location block and the access range of a device data address by a device protocol module in an industrial Internet of things gateway, sending the command frame to industrial equipment, receiving a response message of the industrial equipment, extracting a data set from the response message by the industrial Internet of things gateway, and finally extracting data corresponding to the point location from the data set by the industrial Internet of things gateway.
2. The method for reading blocks based on the industrial internet of things gateway according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
s1, starting a configuration analysis module of an edge computing gateway to analyze point location information in a configuration file issued from an internet middleware, wherein the point location information comprises a register address and a register type;
s2, opening up a continuous address space in a system memory of the edge computing gatewayHFor storing point location information;
s3, classifying the point location information according to the register type for all the point location information from the same industrial equipment, and classifying the point location information with the same register type into one type;
s4, initializing variablesW= -1, selecting an unprocessed point location information, and entering step S5;
s5, obtaining that the address value of a register in the point location information is larger than a variableWIs the minimum register address of (a): if the minimum register address exists, marking the minimum register address asXDetermining slave register addresses based on the maximum number of bytes that can be read at one time specified by the type of protocolXStarting the maximum register address that can be readYStep S6 is entered; otherwise, returning to the step S4 until the processing of all the category point location information is completed, and entering into a step S9;
s6, initializing variablesZ-1 for storing the actual maximum address value that one protocol frame needs to access;
s7, traversing the register addresses in the point location information of the classX～YA value of a maximum register address within the range and assigning the value of the maximum register address to the variableZObtaining the actual address range which is needed to be obtained by the protocol frame corresponding to the point bit blockX～Z；
S8, finishing initialization of a point bit block, taking the register type of the point information as the register type of the point bit block, andX～Zsaving the variable as a device data address access range in a device protocol moduleYValue assignment of (2) to variablesWReturning to the step S5;
s9, starting an equipment protocol module of the edge computing gateway, assembling a corresponding command frame according to the point block information, sending the command frame to the industrial equipment, receiving a response message of the industrial equipment, acquiring a data set from the response message, and finally extracting data of a corresponding point from the acquired data set by the equipment protocol module.
3. The method for reading blocks based on the industrial internet of things gateway according to claim 1, wherein the method comprises the following steps: after the middleware of the Internet of things issues the configuration file to the industrial Internet of things gateway, the industrial Internet of things gateway firstly stores the configuration file to the local, and then starts a configuration analysis module to analyze the configuration file to obtain the type of the protocol and all point location information; and sending all the point location information belonging to the same industrial equipment to a block-by-block reading initialization module by taking the industrial equipment as a unit, and combining the point location information by the block-by-block reading initialization module according to the maximum byte number which can be read at one time and is specified by different types of point location information and types of protocols, and initializing a point location block.
4. A method for reading blocks based on an industrial internet of things gateway according to claim 3, wherein: the configuration parsing module obtains the type of the protocol by calling a cjson library.
5. The method for reading the blocks based on the industrial internet of things gateway according to claim 4, wherein the method comprises the following steps: and after the configuration analysis module acquires the type of the protocol, acquiring parameters including a communication port and a register address based on the corresponding protocol.
6. The method for reading the blocks based on the industrial internet of things gateway according to claim 5, wherein the method comprises the following steps: and the configuration analysis module calls the cjson library again to acquire point location information after acquiring the type of the protocol and parameters including a communication port and a register address.
7. The method for reading blocks based on the industrial internet of things gateway according to claim 1, wherein the method comprises the following steps: if the industrial Internet of things gateway and the industrial equipment communicate through the network port, firstly, ethernet connection is established, and then a corresponding protocol processing module is called according to the type of the protocol to realize the transmission of command frames; if the industrial Internet of things gateway and the industrial equipment are communicated through the serial port, after the industrial Internet of things gateway serial port is initialized, a corresponding protocol processing module is directly called according to the type of the protocol, and command frame transmission is achieved through the industrial Internet of things gateway serial port.
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