CN114443136A - Data transmission method, system, equipment and storage medium for upper computer and PLC - Google Patents

Abstract

The application relates to a data transmission method, a system, equipment and a storage medium of an upper computer and a PLC (programmable logic controller), which comprises the steps of obtaining a control instruction sent to the PLC by the upper computer; establishing a control instruction transmission channel and acquiring first address coding data of the control instruction transmission channel; the PLC equipment acquires a control instruction in the instruction transmission channel and sends a response instruction to the upper computer; establishing a response instruction transmission channel, acquiring second address coding data of the response instruction transmission channel, and acquiring and storing third address coding data of the upper computer; acquiring and storing data information of the first address coding data and the second address coding data, and outputting fourth address coding data; judging whether the third address coding data and the fourth address coding data are the same, if so, matching the response instruction with the control instruction; if not, the response command does not match the control command. The method and the device have the effect of being convenient for judging whether the result of the PLC equipment returning the response result to the matched upper computer is accurate or not.

Description

A data transmission method, system, device and storage medium between a host computer and a PLC

technical field

The present application relates to the technical field of data transmission, and in particular, to a data transmission method, system, device and storage medium between a host computer and a PLC.

Background technique

Programmable Logic Controller PLC (Programmable Logic Controller) is an electronic system specially designed for digital operation operation in industrial environment. It mainly reads the state of external input signals such as: buttons, sensors, switches and pulses, etc., and executes logic and sequence according to the state or value of these input signals and the pre-written program stored in the interior. , timing, counting and arithmetic operations, to generate corresponding output signals such as: relay switch, control the operation of mechanical equipment. The computer can easily edit/modify the program and monitor the status of the device, and carry out on-site program maintenance and commissioning adjustment.

Programmable controller PLC is widely used in industrial automation control due to its advantages of safety and reliability, strong anti-interference ability, high cost performance and simple programming. Real-time collection and management.

In the related art, PLC equipment is generally monitored and controlled through the host computer. The host computer is a computer used in industrial control. Its main function is to monitor and control the operation status of each equipment. It can be reflected, it is convenient to find problems in time and give corresponding solutions, and play the role of control management and decision-making. The upper computer transmits the control instruction to the PLC, and then the PLC will judge the correctness of the instruction, and then send the judgment result back to the upper computer to realize the communication between the two, and the execution is most accurate through the joint judgment of both parties. the operating instructions, thereby enhancing the actual working effect of the control system.

However, if multiple upper computers control different functions of a PLC device at the same time, the PLC device needs to respond to the control commands of each upper computer and return the response results to the matching upper computer. Therefore, it is necessary to judge the PLC Whether the result of the device returning the response result to the matching host computer is accurate needs to be improved.

SUMMARY OF THE INVENTION

In order to facilitate judging whether the result of the PLC device returning the response result to the matching host computer is accurate, the present application provides a data transmission method, system, device and storage medium between the host computer and the PLC.

In the first aspect, a data transmission method between a host computer and a PLC provided by the application adopts the following technical solutions:

A data transmission method between a host computer and a PLC device, comprising the following steps:

Obtain the control instructions sent by each host computer to the PLC device;

establishing a control command transmission channel, storing each of the control commands in the control command transmission channel, and encoding the address of the control command transmission channel to obtain first address encoded data;

The PLC device obtains each control command in the command transmission channel, and sends a response command to each host computer;

establishing a response command transmission channel, storing each of the response commands in the response command transmission channel, and encoding the address of the response command transmission channel to obtain second address encoded data;

Obtain and store the address of the host computer and encode it to obtain the encoded data of the third address;

Acquire and store the data information of the first address encoded data and the second address encoded data, and perform data processing on the first address encoded data and the second address encoded data based on a correlation algorithm to output the fourth address encoded data;

It is judged whether the coded data of the third address and the coded data of the fourth address are the same, if they are the same, the response command matches the control command; if not, the response command does not match the control command.

By adopting the above technical solution, the control instructions sent by each host computer to the PLC equipment are stored in the control instruction transmission channel, and the response instructions sent by the PLC equipment are stored in the response instruction transmission channel, so as to realize the transfer of the control instructions and the response instructions, It reduces the situation that the wrong response command is directly sent to the host computer. In addition, the address of the control command transmission channel and the address of the response command transmission channel are encoded to obtain the first address encoded data and the second address encoded data. After the first address encoded data and the second address encoded data are processed, the outputted fourth address encoded data is matched with the third address encoded data representing the address of the host computer. If the third address encoded data is the same as the fourth address encoded data, then It means that the command response of the PLC device and each host computer is accurate. If the encoded data of the third address is different from the encoded data of the fourth address, it means that the command response of the PLC device and each host computer has an error. On the one hand, it is easy to judge that the PLC device will return the response result. Whether the result to the matching host computer is accurate, on the other hand, when the coded data of the third address is different from the coded data of the fourth address, the host computer that has an error in communication with the PLC device can be accurately found, which is convenient for the staff to debug and maintenance work.

Preferably, the coded data of the first address, the coded data of the second address, the coded data of the third address and the coded data of the fourth address are all binary coded data.

By adopting the above technical scheme, the first address encoded data, the second address encoded data, the third address encoded data and the fourth address encoded data are all binary encoded data, which facilitates the realization of address encoding and subsequent data processing.

Preferably, acquiring and storing the encoded data of the third address where the host computer is located specifically includes:

Obtain the data information of the upper computer that communicates with the PLC equipment;

Encoding the host computer data information to obtain third address encoded data;

The third address coded data adopts prime number data, that is, it can only be divisible by one or itself, and the third address data includes the first factor coded data and the second factor coded data.

By adopting the above technical solution, the third address data is prime number data. Since the prime number data can only be divisible by one or itself, the first factor encoded data and the second factor encoded data have a unique correlation, which improves the first factor encoded data. and the correlation between the second factor encoded data.

Preferably, performing data processing on the first address encoded data and the second address encoded data based on a correlation algorithm to output the fourth address encoded data specifically includes:

obtaining the first address encoded data and the second address encoded data;

The first address coded data is the same as the first factor coded data, and the second address coded data is the same as the second factor coded data;

The first address encoded data and the second address encoded data are multiplied based on a correlation algorithm to obtain fourth address encoded data.

By adopting the above technical solution, since the fourth address encoded data is generated based on the first factor encoded data and the second factor encoded data, it is convenient to improve the correlation between the fourth address encoded data and the third address encoded data.

Preferably, if the third address encoded data is the same as the fourth encoded data, it further includes:

The PLC device sends the response command to the corresponding upper computer, so that the upper computer confirms whether the current communication is normal based on the response command.

By adopting the above technical solution, it is convenient to detect whether the communication between the upper computer and the PLC device is normal.

Preferably, if the encoded data of the third address is different from the encoded data of the fourth address, the method further includes:

Multiply the first address encoded data with the second address encoded data one by one based on a correlation algorithm to obtain each fourth address encoded data;

temporarily store the same fourth encoded data as the encoded data of the third address;

Obtain the control instruction transmission channel where the temporarily stored first address encoded data corresponding to the fourth encoded data is located and the response instruction transmission channel where the second address encoded data is located;

Transmit the response command in the response command transmission channel to the corresponding host computer.

By adopting the above technical solution, when an error in the response result between the PLC device and each host computer is detected, the data is processed again until the fourth encoded data that is the same as the encoded data of the third address is obtained, and then the corresponding reply instruction Send it to the corresponding host computer to adjust and correct the response result.

In the second aspect, the application provides a data transmission system between a host computer and a PLC using the following technical solutions:

A data transmission system between an upper computer and a PLC, comprising:

The acquisition and storage module is used to acquire and store the control instructions sent by the host computer to the PLC equipment;

The address encoding module is used to encode the control command transmission channel, the response command transmission channel and the address of the host computer to generate the first address encoded data, the second address encoded data and the third address encoded data;

a data calculation module for multiplying the first address encoded data and the second address encoded data to generate the fourth address encoded data;

The matching module is used for matching the encoded data of the fourth address with the encoded data of the third address.

In the third aspect, the application provides a kind of electronic equipment adopting the following technical scheme:

An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the above-mentioned data transmission method when executing the computer program.

In a fourth aspect, the present application provides a storage medium containing computer-executable instructions using the following technical solutions:

A storage medium containing computer-executable instructions that, when executed by a computer processor, implement the above-described data transmission method.

By adopting the above technical solution, the operation of the entire method is controlled by a computer program, which helps to improve the stability and accuracy of the operation of the entire method.

To sum up, the present application includes at least one of the following beneficial technical effects:

Store the control commands sent by each host computer to the PLC device in the control command transmission channel, and store the response commands sent by the PLC device in the response command transmission channel, realize the transfer of control commands and response commands, and reduce wrong response commands. The situation of sending directly to the host computer occurs. In addition, the address of the control command transmission channel and the address of the response command transmission channel are encoded to obtain the first address encoded data and the second address encoded data. After the second address encoded data is processed, the outputted fourth address encoded data is matched with the third address encoded data representing the address of the host computer. If the third address encoded data is the same as the fourth address encoded data, it means that the PLC device is connected to each host computer. If the coded data of the third address is different from the coded data of the fourth address, it means that there is an error in the command response of the PLC device and each host computer. On the one hand, it is convenient to judge that the PLC device returns the response result to the matching host computer. Whether the result is accurate or not, on the other hand, when the coded data of the third address is different from the coded data of the fourth address, the upper computer that has an error in communication with the PLC equipment can be accurately found, which is convenient for the staff to debug and maintain;

When it is detected that the response result between the PLC device and each host computer has an error, the data processing is performed again until the fourth encoded data that is the same as the third address encoded data is obtained, and then the corresponding reply command is sent to the corresponding host computer. , so as to adjust and correct the response results.

Description of drawings

1 is a schematic flowchart of the steps of a data transmission method mainly embodying a host computer and a PLC device in an embodiment of the present application;

2 is a schematic diagram of a data transmission system mainly embodying a host computer and a PLC device according to an embodiment of the application;

Reference numerals: 1. Acquisition and storage module; 2. Address coding module; 3. Data calculation module; 4. Matching module.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-2.

This specific embodiment is only an explanation of the present invention, and it does not limit the present invention. Those skilled in the art can make modifications without creative contribution to the present embodiment as required after reading this specification, but as long as the rights of the present invention are used All claims are protected by patent law.

The embodiment of the present application discloses a data transmission method between a host computer and a PLC device, comprising the following steps:

S100. Obtain the control instructions sent by each upper computer to the PLC device.

Among them, the control commands sent by each host computer and the PLC device are different, and the control commands sent by each host computer are aggregated and then distributed uniformly, which is convenient to improve the stability of the control commands sent to the PLC device.

S200. Establish a control command transmission channel, store each control command in the control command transmission channel, and encode the address of the control command transmission channel to obtain first address encoded data.

Wherein, the control command transmission channel can be generated by a separate controller or calculator, each control command is stored in the control command transmission channel, and the address of the control command is obtained and encoded by the controller or computer, so as to obtain the first address encoded data.

The S300.PLC device obtains each control command in the command transmission channel, and sends a response command to each host computer.

S400. Establish a response command transmission channel, store each response command in the response command transmission channel, and encode the address of the response command transmission channel to obtain second address encoded data.

The response command sent by the PLC device is stored in the response command channel, and the address of the response command transmission channel is obtained and encoded by a separate controller and computer, thereby obtaining the second address encoded data.

Store the control commands sent by each host computer to the PLC device in the control command transmission channel, and store the response commands sent by the PLC device in the response command transmission channel, realize the transfer of control commands and response commands, and reduce wrong response commands. When it is sent directly to the host computer,

S500. Acquire and store the address of the host computer and encode it to obtain the encoded data of the third address.

Among them, first obtain the data information of the upper computer that communicates with the PLC equipment, the data information includes the address information of the upper computer to obtain the machine code information, and then use the computer or the controller to encode the data information of the upper computer, so as to obtain the third address code data. The third address encoded data is prime number data, and the prime number data here refers to data that can only be divisible by one or itself. The third address encoded data specifically includes first factor encoded data and second factor encoded data. The factor encoded data and the second factor encoded data are two factor data of the third address encoded data.

S600. Acquire and store data information of the first address encoded data and the second address encoded data, and perform data processing on the first address encoded data and the second address encoded data based on a correlation algorithm to output fourth address encoded data.

Wherein, adopt the computer or the controller to store the data information of the first address encoded data and the second address encoded data, the first address encoded data is identical with the first factor encoded data, and the second address encoded data is identical with the second factor encoded data;

Using the multiplication algorithm program pre-stored in the computer, the first address encoded data and the second address encoded data are multiplied to obtain the fourth address encoded data.

It should be pointed out that the encoded data of the first address, the encoded data of the second address, the encoded data of the third address and the encoded data of the fourth address all use binary encoded data, which is convenient for the computer or controller to realize the address encoding and facilitate the subsequent multiplication processing of the data. .

For example, the encoding data of the third address of each host computer is 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, etc., here is binary data conversion It is decimal data, which is convenient for explanation, and the coded data of the third address are all prime number data. Taking three sets of data as an example to illustrate, if the third address encoded data of a host computer is 2, the first factor encoded data is 1, the corresponding first address encoded data is 1, and the second factor encoded data is 2, the The corresponding second address encoded data is 2. The coded data of the third address of a host computer is 3, the coded data of the first factor is 1, the corresponding coded data of the first address is 1, the coded data of the second factor is 3, and the coded data of the corresponding second address is 3. The coded data of the third address of a host computer is 5, the coded data of the first factor is 1, the corresponding coded data of the first address is 1, the coded data of the second factor is 5, and the coded data of the corresponding second address is 5.

S700. Determine whether the encoded data of the third address is the same as the encoded data of the fourth address. If they are the same, the response command matches the control command; if not, the response command does not match the control command.

Wherein, when a response result deviation occurs, the fourth address encoded data and the third address encoded data output after multiplying the first address encoded data and the second address encoded data will inevitably produce errors, thereby improving the accuracy of the response result judgment.

The address of the control command transmission channel and the address of the response command transmission channel are encoded to obtain the first address encoded data and the second address encoded data, and an algorithm is used to process the first address encoded data and the second address encoded data. The coded data of the fourth address is matched with the coded data of the third address representing the address of the host computer. If the coded data of the third address is the same as the coded data of the fourth address, it means that the command response of the PLC device and each host computer is accurate. The coded data is different from the coded data of the fourth address, which means that an error occurs in the command response between the PLC device and each host computer. When the coded data of the third address is different from the coded data of the fourth address, the upper computer that has an error in communication with the PLC equipment can be accurately found, which is convenient for the debugging and maintenance work of the staff.

If the coded data of the third address is the same as the coded data of the fourth address, the PLC device sends a response command to the corresponding upper computer, so that the upper computer confirms whether the current communication is normal based on the response command. If the coded data of the third address is different from the coded data of the fourth address, use the multiplication algorithm inside the computer to multiply the coded data of the first address and the coded data of the second address one by one to obtain the coded data of each fourth address. Store the fourth coded data that is the same as the third address coded data, obtain again the control command transmission channel where the first address coded data corresponding to the temporarily stored fourth coded data is located and the response command transmission channel where the second address coded data is located, and then The response command in the response command transmission channel is transmitted to the corresponding upper computer, so as to realize the adjustment and correction of the response result.

The embodiment of the present application also discloses a data transmission system between an upper computer and a PLC, including:

The acquisition and storage module 1 is used to acquire and store the control instructions sent by the host computer to the PLC equipment;

The address encoding module 2 is used to encode the control command transmission channel, the response command transmission channel and the address of the host computer to generate the first address encoded data, the second address encoded data and the third address encoded data;

Data calculation module 3, for multiplying the first address encoded data and the second address encoded data and generating the fourth address encoded data;

The matching module 4 is configured to match the encoded data of the fourth address with the encoded data of the third address.

The embodiments of the present application further disclose an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements the above data transmission method when executing the computer program.

The embodiment of the present application also discloses a storage medium containing computer-executable instructions, where the computer-executable instructions implement the above-mentioned data transmission method when executed by a computer processor. The storage medium of computer-executable instructions includes, for example: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other various programs that can store program codes medium.

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims (9)

1. A data transmission method of an upper computer and a PLC is characterized by comprising the following steps:

acquiring control instructions sent by the upper computers to the PLC equipment;

establishing a control instruction transmission channel, storing each control instruction into the control instruction transmission channel, and coding the address of the control instruction transmission channel to obtain first address coding data;

the PLC equipment acquires each control instruction in the instruction transmission channel and sends a response instruction to each upper computer;

establishing a response instruction transmission channel, storing each response instruction into the response instruction transmission channel, and encoding the address of the response instruction transmission channel to obtain second address encoded data;

acquiring and storing the address of the upper computer and coding to obtain third address coding data;

acquiring and storing data information of first address coding data and second address coding data, and performing data processing on the first address coding data and the second address coding data based on a correlation algorithm to output fourth address coding data;

judging whether the third address coding data is the same as the fourth address coding data, if so, matching the response instruction with the control instruction; if not, the response instruction is not matched with the control instruction.

2. The data transmission method of the upper computer and the PLC according to claim 1, wherein: the first address coding data, the second address coding data, the third address coding data and the fourth address coding data all adopt binary coding data.

3. The data transmission method of the upper computer and the PLC according to claim 1, wherein: the acquiring and storing of the third address coding data of the upper computer specifically comprises:

acquiring data information of an upper computer communicating with the PLC equipment;

encoding the data information of the upper computer to obtain third address encoded data;

the third address coding data adopts prime number data, namely the prime number data can be only divided by one or self, and the third address data comprises first factor coding data and second factor coding data.

4. The data transmission method of the upper computer and the PLC according to claim 1, wherein:

the data processing the first address encoding data and the second address encoding data based on the correlation algorithm to output fourth address encoding data specifically includes:

acquiring first address coding data and second address coding data;

the first address encoded data is the same as the first factor encoded data, and the second address encoded data is the same as the second factor encoded data;

and multiplying the first address encoding data and the second address encoding data based on a correlation algorithm to obtain fourth address encoding data.

5. The data transmission method between the upper computer and the PLC according to claim 1, wherein: if the third address encoding data is the same as the fourth encoding data, the method further comprises the following steps:

and the PLC equipment sends the response instruction to a corresponding upper computer so that the upper computer confirms whether the current communication is normal or not based on the response instruction.

6. The data transmission system between a host computer and a PLC according to claim 1, comprising:

if the third address encoding data is different from the fourth address encoding data, the method further comprises:

multiplying the first address coding data one by one with the second address coding data one by one based on a correlation algorithm to obtain fourth address coding data;

temporarily storing fourth encoded data which is the same as the third address encoded data;

acquiring a control instruction transmission channel where first address coded data corresponding to the temporarily stored fourth coded data is located and a response instruction transmission channel where second address coded data is located;

and transmitting the response instruction in the response instruction transmission channel to the corresponding upper computer.

7. The utility model provides a data transmission system of host computer and PLC which characterized in that includes:

the acquisition and storage module (1) is used for acquiring and storing a control instruction sent to the PLC equipment by the upper computer;

the address coding module (2) is used for coding the control instruction transmission channel, the response instruction transmission channel and the upper computer address to generate first address coding data, second address coding data and third address coding data;

a data calculation module (3) for multiplying the first address encoding data and the second address encoding data and generating fourth address encoding data;

and the matching module (4) is used for matching the fourth address coding data with the third coding data.

8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the data transmission method according to any one of claims 1 to 6 when executing the computer program.

9. A storage medium containing computer-executable instructions, which when executed by a computer processor implement the data transmission method of any one of claims 1-6.

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