CN107276870B - Data transmission method and device of instrument lower computer - Google Patents
Data transmission method and device of instrument lower computer Download PDFInfo
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- CN107276870B CN107276870B CN201710451634.2A CN201710451634A CN107276870B CN 107276870 B CN107276870 B CN 107276870B CN 201710451634 A CN201710451634 A CN 201710451634A CN 107276870 B CN107276870 B CN 107276870B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40228—Modbus
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Abstract
The invention discloses a data transmission method and a data transmission device of a lower computer of an instrument, wherein the method comprises the following steps: numbering the data with independent physical significance in the storage space of each lower computer; selecting the content of each data according to the communication protocol requirement of the upper computer, and selecting the data to be transmitted; adjusting the sequence of each data according to the communication protocol requirement of the upper computer to generate communication data; storing the communication data to a space to be read of an upper computer in a lower computer; and transmitting the communication data in the space to be read of the upper computer to the upper computer. According to the invention, the data with independent physical significance is extracted from the storage space of the lower computer of the instrument, and then numbering, selecting and adjusting are carried out again according to the field protocol requirement, and then transmission is carried out, so that the problem that the transmission data content of the lower computer of the instrument is inconsistent with the field to-be-transmitted data requirement is solved, and the effect that the protocol content of the lower computer of the instrument is effectively compatible with the field protocol requirement is achieved.
Description
Technical Field
The embodiment of the invention relates to the communication technology of industrial instruments, in particular to a data transmission method and device of an instrument lower computer.
Background
At present, in the industrial field, due to the improvement of the automation degree, most instruments have a data remote transmission function, and typically, data are transmitted to an upper computer from a lower computer connected with the instruments.
In an industrial field, data required to be transmitted by lower computers of different instruments are uploaded to an upper computer independently or in parallel. The transmission protocol of the lower computer and the upper computer can adopt a Modbus protocol. Although the data format of the Modbus protocol is disclosed, the data content to be communicated by the lower computer of a specific meter is different according to the meters and field requirements of different companies.
In an actual industrial field, meters in the same application environment are not only located in one company, and parameter settings of meters in different companies are usually different from one another. Generally, when the meters of the same company are shipped from the factory, the corresponding parameters are already set, and the user cannot change the parameters. The field requirements can limit specific groups of data in all data measured by the transmission of the instrument and arrange the data according to a specific sequence, and meanwhile, specific requirements are placed on parameters such as data formats and register positions of data transmitted by the instrument, and the specific requirements are limited by the transmission requirements of the upper computer on the data.
In order to ensure the normal operation of communication, the problem that the parameter content of the lower computer of the instrument is inconsistent with the requirements of the data to be transmitted on site and the parameters thereof needs to be solved. At present, the prior art mainly guarantees the normal operation of communication through the following three ways: the upper computer continuously modifies the program so as to adapt to the communication protocols of the lower computers of different instruments; the instrument manufacturer continuously updates programs according to protocol requirements of different users so as to adapt to communication protocols of different upper computers; a protocol converter is added.
The above three methods have the following disadvantages: the operation content of the upper computer is increased, and the unified management of the same area is not facilitated; the instrument manufacturer needs to continuously update the program according to the order, which is not beneficial to the uniformity and readability of the program, is difficult to manage, consumes manpower and causes the situation of double results; increasing the cost.
Disclosure of Invention
The invention provides a data transmission method and device of an instrument lower computer, which aim to effectively solve the problem that the protocol content of the instrument lower computer does not accord with the field protocol requirement.
In a first aspect, an embodiment of the present invention provides a data transmission method for a lower computer of an instrument, including:
numbering the data with independent physical significance in the storage space of each lower computer;
selecting the content of each data according to the communication protocol requirement of the upper computer, and selecting the data to be transmitted;
adjusting the sequence of each data according to the communication protocol requirement of the current upper computer to generate communication data;
storing the communication data to a space to be read of an upper computer in a lower computer;
and transmitting the communication data in the space to be read of the upper computer to the upper computer.
Wherein the type of the data at least comprises: temperature, pressure, rotational speed, frequency and flow rate.
Before the communication data is stored in a space to be read of an upper computer in a lower computer, the method further comprises the following steps:
and adjusting the data format of the communication data of the lower computer according to the communication protocol requirement of the upper computer.
Before storing the communication data into a space to be read of an upper computer in a lower computer, the method further comprises the following steps:
and determining the space to be read of the upper computer in a register of the lower computer according to the communication protocol requirement of the upper computer.
Wherein, in the above method, further comprising:
and the communication protocol requirements of at least two upper computers are displayed through the menu of the lower computer for the user to select.
In a second aspect, an embodiment of the present invention further provides a data transmission device for a lower computer of an instrument, including:
the numbering module is used for numbering the data with independent physical significance in the storage space of the lower computer;
the selection module is used for selecting the content of each data according to the communication protocol requirement of the upper computer and selecting the data to be transmitted;
the sequence adjusting module is used for adjusting the sequence of the data according to the communication protocol requirement of the upper computer to generate communication data;
the storage module is used for storing the communication data to a space to be read by an upper computer in a lower computer;
and the transmission module is used for transmitting the communication data in the space to be read of the upper computer to the upper computer.
The format adjusting module is used for adjusting the data format of the communication data of the lower computer according to the communication protocol requirement of the upper computer before the communication data is stored in the space to be read of the upper computer in the lower computer.
The space address determining module is used for determining the space to be read of the upper computer in a register of the lower computer according to the communication protocol requirement of the upper computer before the communication data are stored in the space to be read of the upper computer in the lower computer.
Wherein, in the above-mentioned device, still include:
and the protocol selection module is used for displaying the communication protocol requirements of at least two upper computers through the menu of the lower computer for the user to select.
According to the embodiment of the invention, the data with independent physical significance is extracted from the storage space of the lower computer of the instrument, and then the data is numbered, selected and adjusted again according to the field protocol requirement and then transmitted, so that the problem that the transmission data content of the lower computer of the instrument is inconsistent with the field to-be-transmitted data requirement is solved, and the effect that the protocol content of the lower computer of the instrument is effectively compatible with the field protocol requirement is achieved.
Drawings
Fig. 1 is a flowchart of a data transmission method of a lower computer of an instrument according to a first embodiment of the present invention.
Fig. 2 is a flowchart of a data transmission method of a lower computer of an instrument in the second embodiment of the present invention.
Fig. 3 is a flowchart of a data transmission method of a lower computer of an instrument in the third embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a data transmission device of an instrument lower computer in the fourth embodiment of the present invention.
Fig. 5 is a flowchart of a data transmission method of a lower computer of an instrument in the fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a data transmission method of a lower computer of an instrument according to an embodiment of the present invention, where the present embodiment is applicable to the technical field of industrial instrument communication, and the method may be executed by a data transmission device of the lower computer of the instrument, and the device may be implemented in a hardware and/or software manner, and may be generally integrated in any lower computer of the instrument, and the method includes:
step 110, numbering the data with independent physical significance in the storage space of each lower computer;
the data with independent physical significance is stored in the storage space of the lower computer of the instrument according to the data storage protocol of the lower computer of the instrument, and can be identified and extracted independently. By numbering data with independent physical significance, further manipulation of the data is facilitated. The numbering may be performed by distinguishing data from each other, and may be performed sequentially or according to other rules. On the basis of the above technical solutions, the types of the data at least include: temperature, pressure, rotational speed, frequency and flow rate.
120, selecting the content of each data according to the communication protocol requirement of the upper computer, and selecting the data to be transmitted;
the communication protocol requirements of the upper computer usually indicate data contents which need to be transmitted by the lower computer of the instrument, and the lower computer of the instrument is not required to upload all data in the storage space, but is required to be one group or a plurality of groups. And the instrument lower computer selects each data to realize the compatibility of the protocol content of the instrument lower computer and the field protocol requirement.
Step 130, adjusting the sequence of each data according to the communication protocol requirement of the current upper computer to generate communication data;
the communication protocol requirements of the upper computer usually specify that the lower meter computer needs to transmit data according to a set sequence. The lower computer of the instrument adjusts the sequence of each data to generate communication data, and the protocol content of the lower computer of the instrument is compatible with the data sequence required by the field protocol.
Step 140, storing the communication data to a space to be read of an upper computer in a lower computer;
the communication data generated after the numbering, the selection and the adjustment are stored in a space to be read by the upper computer, so that the communication data can be conveniently transmitted to the upper computer in the next step. The space to be read of the upper computer is a part of the storage space which is specially used for the upper computer to read data. After the lower computer stores the communication data in the space to be read by the upper computer, the upper computer can automatically and sequentially read the communication data from the space to be read by the upper computer according to a set rule.
And 150, transmitting the communication data in the space to be read of the upper computer to the upper computer.
The communication data stored in the space to be read of the upper computer of the lower computer of the instrument is compatible with the requirements of a field protocol, can be communicated and transmitted to the upper computer.
According to the embodiment of the invention, the data with independent physical significance is extracted from the storage space of the lower computer of the instrument, and then the data is numbered, selected and adjusted again according to the field protocol requirement and then transmitted, so that the problem that the transmission data content of the lower computer of the instrument is inconsistent with the field to-be-transmitted data requirement is solved, and the effect that the protocol content of the lower computer of the instrument is effectively compatible with the field protocol requirement is achieved.
Example two
Fig. 2 is a flowchart of a data transmission method of a lower computer of an instrument according to a second embodiment of the present invention, and this embodiment preferably further includes adjusting a data format of communication data of the lower computer according to a communication protocol requirement of the upper computer before storing the communication data in a space to be read of the upper computer in the lower computer on the basis of the second embodiment. The method specifically comprises the following steps:
step 210, numbering the data with independent physical significance in the storage space of each lower computer;
220, selecting the content of each data according to the communication protocol requirement of the upper computer, and selecting the data to be transmitted;
step 230, adjusting the sequence of each data according to the communication protocol requirement of the upper computer to generate communication data;
step 240, adjusting the data format of the communication data of the lower computer according to the communication protocol requirement of the upper computer;
the data format is a format in which data is stored in a file or record, and may be a floating point type, an integer type, a character type, or an enumeration type. The format may also be in the form of numeric values, characters, or binary numbers, etc. Described by data type and number growth. It is determined that certain conditions should be met: ensuring to record all required information; the storage efficiency is improved, and the storage space is fully utilized; the format is standardized, and the data exchange between related data processing systems is guaranteed. Generally, a fixed length format and a variable length format are classified according to the characteristics of the data recording length. The former file has records with the same length, and the latter length is determined by the length of the record value. The data format determines how the bits representing these data are stored in the controller's memory.
Step 250, storing the communication data subjected to the data format adjustment to a to-be-read space of an upper computer in a lower computer;
and step 260, transmitting the communication data in the space to be read of the upper computer to the upper computer.
According to the technical scheme of the embodiment, the data format of the communication data of the lower computer is further adjusted according to the communication protocol requirement of the upper computer, the problem that the content and the data format of the transmission data of the lower computer of the instrument do not accord with the requirement of the field to-be-transmitted data is solved, and the effect that the protocol content of the lower computer of the instrument is effectively compatible with the requirement of the field protocol is achieved.
EXAMPLE III
Fig. 3 is a flowchart of a data transmission method of a lower computer of an instrument according to a third embodiment of the present invention, and this embodiment preferably further includes determining a space to be read by an upper computer in a register of the lower computer according to a communication protocol requirement of the upper computer before storing the communication data in the space to be read by the upper computer in the lower computer on the basis of the third embodiment.
The method specifically comprises the following steps:
step 310, numbering the data with independent physical meanings in the storage spaces of the lower computers;
320, selecting the content of each data according to the communication protocol requirement of the upper computer, and selecting the data to be transmitted;
step 330, adjusting the sequence of each data according to the communication protocol requirement of the current upper computer to generate communication data;
step 340, determining a space to be read by the upper computer in a register of the lower computer according to the communication protocol requirement of the upper computer;
the register starting position of the communication data of the lower computer of the instrument is usually specified in the communication protocol requirement of the upper computer. The lower computer of the instrument sets the initial position of the space to be read of the upper computer as the initial position of a register required by the communication protocol of the upper computer, and the protocol content of the lower computer of the instrument is compatible with the field protocol requirement.
Step 350, storing the communication data to a space to be read of an upper computer in a lower computer;
and step 360, transmitting the communication data in the space to be read of the upper computer to the upper computer.
According to the technical scheme of the embodiment, the space to be read of the upper computer is determined in the register of the lower computer according to the communication protocol requirement of the upper computer, the problem that the content, the data format and the initial position of the register of the lower computer of the instrument do not accord with the requirement of the data to be transmitted on site is solved, and the effect that the protocol content of the lower computer of the instrument is effectively compatible with the requirement of the protocol on site is achieved.
On the basis of the above embodiments, it is preferable that the communication protocol requirements of at least two upper computers are displayed through the menu of the lower computer for the user to select. The communication protocol requirements of the upper computer can be preset in the lower computer of the instrument, can also be acquired and known from the upper computer, and preferably provide selection items in a menu of the lower computer for a user to set. The communication protocol requirements can be a combination of a group of requirements, and the user can also select or customize items such as an input sequence, a space to be read, a data format and the like.
Example four
Fig. 4 is a schematic structural diagram of a data transmission device of an instrument lower computer according to a fourth embodiment of the present invention, which is applicable to the technical field of industrial instrument communication, and the data transmission device of the instrument lower computer includes:
a numbering module 410, a selection module 420, an order adjustment module 430, a storage module 440, and a transmission module 450.
The numbering module 410 is used for numbering data with independent physical meanings in the storage space of the lower computer; the selection module 420 is used for selecting the content of each data according to the communication protocol requirement of the upper computer and selecting the data to be transmitted; the sequence adjusting module 430 is used for adjusting the sequence of the data according to the communication protocol requirement of the upper computer to generate communication data; the storage module 440 is configured to store the communication data in a to-be-read space of an upper computer in a lower computer; and the transmission module 450 is used for transmitting the communication data in the space to be read of the upper computer to the upper computer.
According to the technical scheme, the data with the independent physical significance are extracted from the storage space of the lower computer of the instrument, and then are numbered, selected and adjusted again according to the field protocol requirement and then transmitted, so that the problem that the transmission data content of the lower computer of the instrument is inconsistent with the field to-be-transmitted data requirement is solved, and the effect that the protocol content of the lower computer of the instrument is effectively compatible with the field protocol requirement is achieved.
On the basis of the above embodiment, a format adjustment module is preferably further added. And the format adjusting module is used for adjusting the data format of the communication data of the lower computer according to the communication protocol requirement of the upper computer before the communication data is stored in the space to be read of the upper computer in the lower computer.
The device can also be added with a space address determination module. The space address determining module is configured to store the communication data in front of a to-be-read space of an upper computer in a lower computer, and includes: and determining the space to be read of the upper computer in a register of the lower computer according to the communication protocol requirement of the upper computer.
The data transmission device of the lower computer of the instrument can execute the data transmission method of the lower computer of the instrument provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
EXAMPLE five
Fig. 5 is a flowchart of a data transmission method of a lower computer of an instrument according to a seventh embodiment of the present invention. The present embodiment may provide a preferable example based on the above-described embodiments. The method comprises the following steps:
step S510, knowing the client protocol requirements;
the client protocol requirement generally refers to a protocol requirement of an application field, and may specifically include a type, an order, a format, and/or a register start position of communication data.
S520, entering a communication parameter setting menu of the lower computer of the instrument;
preferably, the menu can be touch or button type, and is equipped with a liquid crystal screen, which is convenient for the user to operate.
Step S530, selecting the required communication data;
wherein one or several sets of data, such as temperature, rotational speed and/or pressure, are selected according to the protocol requirements of the customer.
Step S540, establishing a communication data;
wherein, the selected group or several groups of data are established as a whole communication data.
Step S550, selecting a sequence number of the data;
the client protocol requires setting the sequence of each data, such as transmitting temperature, pressure, and rotational speed. The order of the temperature is 1, the order of the pressure is 2, and the order of the rotational speed is 3.
The preferred method is to flexibly configure the instrument according to the menu structure of the specific instrument, the number of data can be appointed by a designer, and different selection and numbering modes can be adopted according to the type and the size of the liquid crystal. For example, the communication data may be numbered in a simple manner of 1 to n. If the repeated number value exists, an error is reported, and the communication data is exchanged up and down by using a key to realize the reformation of the sequence.
In the program of the single chip microcomputer, data corresponding to the Modbus can be arranged autonomously according to the sequence of the selected data in the menu (the data formats are the same, for example, a floating point format), and since a user generally starts from 0001 when reading the register, only communication according to newly generated data is needed. Preferably, the data format of the communication data and the register start address of the communication data are also selectable in the menu. Because the direct reading effect of floating point data is more convenient, and the register generally starts to be read from 0001, the data format of the communication data of the lower computer of the instrument and the initial position of the register are defaulted to two options.
Step S560, resetting the communication data according to the sequence of the selected communication data number;
wherein the communication data is regenerated according to the selected data sequence number. The actual communication data is determined by the communication data numbering sequence. And after the communication data numbers are set, the communication data are assigned again according to the sequence of the communication data number setting, so that the sequence of the communication data can be matched with the field requirements.
Step S570, exiting the communication data operation menu;
and after the communication data is reset according to the client protocol requirement, the communication data operation menu is quitted, and the next data transmission is carried out.
Step S580, calling communication data by the Modbus program;
the communication protocol for selecting data transmission may be a Modbus communication protocol.
And step S590, transmitting the communication data.
Wherein the reset communication data is transmitted according to the selected communication protocol. How the communication program of the Modbus is realized is not described in detail.
The following is a simple programming of the resetting of the communication data, the actual programming being handled according to the performance of the different meters and the different processors.
typedef struct
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A data transmission method of a lower computer of an instrument is characterized by comprising the following steps:
numbering the data with independent physical significance in the storage space of each lower computer;
selecting the content of each data according to the communication protocol requirement of the upper computer, and selecting the data to be transmitted;
adjusting the sequence of the selected data to be transmitted according to the communication protocol requirement of the upper computer to generate communication data;
storing the communication data to a space to be read of an upper computer in a lower computer;
and transmitting the communication data in the space to be read of the upper computer to the upper computer.
2. The method of claim 1, wherein the type of data comprises at least: temperature, pressure, rotational speed, frequency and flow rate.
3. The method of claim 1, wherein before storing the communication data in the space to be read by the upper computer in the lower computer, the method further comprises:
and adjusting the data format of the communication data of the lower computer according to the communication protocol requirement of the upper computer.
4. The method of claim 1, wherein before storing the communication data in the space to be read by the upper computer in the lower computer, the method further comprises:
and determining the space to be read of the upper computer in a register of the lower computer according to the communication protocol requirement of the upper computer.
5. The method of any of claims 1-4, further comprising:
and the communication protocol requirements of at least two upper computers are displayed through the menu of the lower computer for the user to select.
6. The utility model provides a data transmission device of instrument lower computer which characterized in that includes:
the numbering module is used for numbering the data with independent physical significance in the storage space of the lower computer;
the selection module is used for selecting the content of each data according to the communication protocol requirement of the upper computer and selecting the data to be transmitted;
the sequence adjusting module is used for adjusting the sequence of the selected data needing to be transmitted according to the communication protocol requirement of the upper computer to generate communication data;
the storage module is used for storing the communication data to a space to be read by an upper computer in a lower computer;
and the transmission module is used for transmitting the communication data in the space to be read of the upper computer to the upper computer.
7. The apparatus of claim 6, further comprising:
and the format adjusting module is used for adjusting the data format of the communication data of the lower computer according to the communication protocol requirement of the upper computer before the communication data is stored in the space to be read of the upper computer in the lower computer.
8. The apparatus of claim 6, further comprising:
and the space address determining module is used for determining the space to be read of the upper computer in a register of the lower computer according to the communication protocol requirement of the upper computer before the communication data is stored in the space to be read of the upper computer in the lower computer.
9. The apparatus of any of claims 6-8, further comprising:
and the protocol selection module is used for displaying the communication protocol requirements of at least two upper computers through the menu of the lower computer for the user to select.
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| CN201532698U (en) * | 2009-09-10 | 2010-07-21 | 深圳市飞霞机电技术有限公司 | Comprehensive energy consumption data acquisition apparatus |
| CN101895462A (en) * | 2010-01-28 | 2010-11-24 | 袁亚军 | Serial communication gateway |
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| CN204305072U (en) * | 2014-12-26 | 2015-04-29 | 广州杰赛科技股份有限公司 | A kind of Multi-protocol converter |
| CN105281968A (en) * | 2014-06-24 | 2016-01-27 | 王金鹤 | Eddy current detection system data algorithm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013128902A1 (en) * | 2012-03-01 | 2013-09-06 | パナソニック株式会社 | Cordless handset for power management system and power management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201532698U (en) * | 2009-09-10 | 2010-07-21 | 深圳市飞霞机电技术有限公司 | Comprehensive energy consumption data acquisition apparatus |
| CN101895462A (en) * | 2010-01-28 | 2010-11-24 | 袁亚军 | Serial communication gateway |
| CN102393703A (en) * | 2011-10-17 | 2012-03-28 | 青岛银河环保股份有限公司 | Data transmitting method for lower computer in sewage treatment plant |
| CN105281968A (en) * | 2014-06-24 | 2016-01-27 | 王金鹤 | Eddy current detection system data algorithm |
| CN204305072U (en) * | 2014-12-26 | 2015-04-29 | 广州杰赛科技股份有限公司 | A kind of Multi-protocol converter |
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