CN112073470A - Industrial control system communication method and device, computer equipment and storage medium - Google Patents
Industrial control system communication method and device, computer equipment and storage medium Download PDFInfo
- Publication number
- CN112073470A CN112073470A CN202010824773.7A CN202010824773A CN112073470A CN 112073470 A CN112073470 A CN 112073470A CN 202010824773 A CN202010824773 A CN 202010824773A CN 112073470 A CN112073470 A CN 112073470A
- Authority
- CN
- China
- Prior art keywords
- upper computer
- address
- connection
- programmable logic
- logic controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Programmable Controllers (AREA)
Abstract
The application relates to an industrial control system communication method, an industrial control system communication device, computer equipment and a storage medium. The method comprises the following steps: acquiring an upper computer address in a local area network, and establishing communication connection with an upper computer according to the upper computer address; sending sensor data of the measuring points to the upper computer at preset time intervals; and acquiring a control instruction sent by the upper computer according to the sensor data, and executing the control instruction. By adopting the method, the communication safety of the programmable logic controller can be realized.
Description
Technical Field
The present application relates to the field of industrial control system communication technologies, and in particular, to an industrial control system communication method, an apparatus, a computer device, and a storage medium.
Background
An industrial control system is used for controlling a production process, and is a core center of industrial production, currently, an industrial control protocol widely used in the industrial control system takes a Programmable Logic Controller (PLC) as a core, and an engineer establishes a connection with the PLC through a specific communication port to send a control command. In a closed environment, the design is not flexible, but with the development of industrial informatization, more and more devices realize interconnection and intercommunication through the internet, and the design inevitably brings the problem that the PLC is vulnerable to external attack. The PLC in an industrial control system directly operates production equipment, so most of the attacks against the industrial control system are finally targeted to the PLC. However, the currently used industrial control protocol has its own limitations in design, the PLC as a provider of communication service needs to monitor a communication port and respond to a connection request, and in case of improper network configuration, the PLC is directly exposed on the public network, which brings about a great potential safety hazard. The PLC is used as equipment for controlling the production process, and the PLC is not considered in the aspect of network safety protection in design, and the safety of the PLC needs to be guaranteed by depending on external environment and other equipment, so that great challenge is brought to industrial control safety protection.
In order to improve the security of the industrial control protocol, on one hand, the existing industrial control manufacturers upgrade the currently used industrial control protocol and introduce technical means such as session control, token technology, encryption technology and the like to perform security protection on the communication process, and on the other hand, the security manufacturers develop industrial control security equipment such as industrial control firewalls, industrial control flow auditing and the like to perform security protection on an industrial control system.
However, the existing methods for improving the security of the industrial control protocol all process the communication data or add other security devices, which results in an increase in the cost of security.
Disclosure of Invention
In view of the above, it is necessary to provide an industrial control system communication method, an apparatus, a computer device, and a storage medium capable of improving communication security.
An industrial control system communication method, the method comprising:
acquiring an upper computer address in a local area network, and establishing communication connection with an upper computer according to the upper computer address;
sending sensor data of the measuring points to the upper computer at preset time intervals;
and acquiring a control instruction sent by the upper computer according to the sensor data, and executing the control instruction.
In one embodiment, the acquiring an address of an upper computer in a local area network and establishing a communication connection with the upper computer according to the address of the upper computer includes: establishing communication connection with an upper computer in the local area network according to a prestored IP address of the upper computer; and/or, obtaining an upper computer address in the current local area network through a user datagram protocol, and establishing communication connection with an upper computer according to the upper computer address; and/or establishing communication connection with an upper computer in the local area network through a three-layer routing exchange protocol.
In one embodiment, the industrial control system communication method further includes: judging whether the connection with the upper computer is successful; and if the connection with the upper computer is successful, sending the sensor data of the measuring point to the upper computer at a preset time interval.
In one embodiment, after determining whether the connection with the upper computer is successful, the method further includes: and if the connection with the upper computer fails, acquiring the address of the upper computer in the local area network again after preset time, and establishing communication connection with the upper computer according to the address of the upper computer.
In one embodiment, the control instructions include at least one of maintaining a current state, modifying a data point, modifying a programmable logic controller configuration, and modifying a programmable logic controller state.
An industrial control system communication method, the method comprising: monitoring a communication port, and acquiring a connection request of a programmable logic controller in a local area network;
establishing connection with the programmable logic controller according to the connection request;
acquiring sensor data of a measuring point sent by the programmable logic controller;
and sending a control instruction to the programmable logic controller according to the sensor data.
In one embodiment, after establishing a connection with the programmable logic controller according to the connection request, the method includes: and sending connection success information to the programmable logic controller.
An industrial control system communication device, the device comprising:
the communication connection module is used for acquiring an upper computer address in a local area network and establishing communication connection with an upper computer according to the upper computer address;
the sensor data sending module is used for sending the sensor data of the measuring point to the upper computer at a preset time interval;
and the execution module is used for acquiring the control instruction sent by the upper computer according to the sensor data and executing the control instruction.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
acquiring an upper computer address in a local area network, and establishing communication connection with an upper computer according to the upper computer address;
sending sensor data of the measuring points to the upper computer at preset time intervals;
and acquiring a control instruction sent by the upper computer according to the sensor data, and executing the control instruction.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
acquiring an upper computer address in a local area network, and establishing communication connection with an upper computer according to the upper computer address;
sending sensor data of the measuring points to the upper computer at preset time intervals;
and acquiring a control instruction sent by the upper computer according to the sensor data, and executing the control instruction.
According to the communication method, the communication device, the computer equipment and the storage medium of the industrial control system, the safety of the connected upper computer is guaranteed by connecting the communication device, the computer equipment and the storage medium with the upper computer in the local area network, the sensor data of the measuring point is sent to the upper computer through the preset time interval to obtain the control instruction of the upper computer, the programmable logic controller is guaranteed to actively obtain the control instruction, and compared with the existing programmable logic controller, the communication safety is improved by reading the data through the external network communication port.
Drawings
FIG. 1 is a diagram of an example environment in which an industrial control system may communicate;
FIG. 2 is a flow diagram of a method of industrial control system communication in one embodiment;
FIG. 3 is a flow diagram of a method of industrial control system communication in another embodiment;
FIG. 4 is a block diagram of an industrial control system communication device in one embodiment;
FIG. 5 is a block diagram of an industrial control system communication device in another embodiment;
FIG. 6 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The industrial control system communication method provided by the application can be applied to the application environment shown in fig. 1. The programmable logic controller 104 communicates with the upper computer 102 through a network, and the programmable logic controller 104 is connected to a plurality of production devices 106. The programmable logic controller 104 acquires an upper computer address in the local area network and establishes communication connection with the upper computer 102 according to the upper computer address; the programmable logic controller 104 sends sensor data of the measuring points to the upper computer 102 at preset time intervals; and the programmable logic controller 104 acquires a control instruction sent by the upper computer 102 according to the sensor data and executes the control instruction. The upper computer 102 may be implemented by an independent server or a server cluster composed of a plurality of servers.
In one embodiment, as shown in fig. 2, there is provided an industrial control system communication method, including the steps of:
s110, obtaining an upper computer address in the local area network, and establishing communication connection with an upper computer according to the upper computer address.
The industrial control system is composed of DCS/PLC and other control equipment, temperature/pressure and other sensors and an upper computer, monitors and controls the industrial production process, and is a core center of industrial production. The upper computer stores control instructions and is used for controlling control equipment such as DCS/PLC and sensors such as temperature/pressure. The upper computer address can be the IP address of the upper computer.
And S120, sending the sensor data of the measuring points to the upper computer at preset time intervals.
Wherein the predetermined time interval is set as required, for example, the predetermined time interval is 2 seconds. The programmable logic controller regularly sends sensor data of the measuring point to the upper computer at preset time intervals, and the programmable logic controller actively accesses other equipment. The sensor data includes temperature sensor data and pressure sensor data, although the sensor data may include other types of sensor data.
And S130, acquiring a control instruction sent by the upper computer according to the sensor data, and executing the control instruction.
And after receiving the data of the sensor, the upper computer sends a control instruction to the programmable logic controller according to the data type of the sensor. The programmable logic controller executes the control instructions, e.g., the programmable logic controller maintains a current state, modifies a data point, modifies a programmable logic controller configuration, or modifies a programmable logic controller state.
According to the communication method of the industrial control system, the safety of the connected upper computer is guaranteed by connecting the communication method with the upper computer in the local area network, the sensor data of the measuring point is sent to the upper computer through the preset time interval to obtain the control instruction of the upper computer, the programmable logic controller is guaranteed to actively obtain the control instruction, and compared with the existing programmable logic controller, the communication safety is improved by reading the data through the external network communication port.
In one embodiment, the acquiring an address of an upper computer in a local area network and establishing a communication connection with the upper computer according to the address of the upper computer includes: establishing communication connection with an upper computer in the local area network according to a prestored IP address of the upper computer; and/or, obtaining an upper computer address in the current local area network through a user datagram protocol, and establishing communication connection with an upper computer according to the upper computer address; and/or establishing communication connection with an upper computer in the local area network through a three-layer routing exchange protocol.
The programmable logic controller can store an IP address of an upper computer in a local area network; or actively broadcasting a datagram protocol to the inside of the local area network for obtaining the address of the upper computer.
In one embodiment, the industrial control system communication method further includes: judging whether the connection with the upper computer is successful; and if the connection with the upper computer is successful, sending the sensor data of the measuring point to the upper computer at a preset time interval.
In one embodiment, after determining whether the connection with the upper computer is successful, the method further includes: and if the connection with the upper computer fails, acquiring the address of the upper computer in the local area network again after preset time, and establishing communication connection with the upper computer according to the address of the upper computer.
In one embodiment, the control instructions include at least one of maintaining a current state, modifying a data point, modifying a programmable logic controller configuration, and modifying a programmable logic controller state.
The current state is kept as a control instruction for keeping the current state of the programmable logic controller, the modification data point is a control instruction for modifying data of a data point position in an internal operation program, the configuration of the modification programmable logic controller is configured to modify the control instruction of the configuration of the programmable logic controller, such as an IP address, a data uploading period and the like, and the state of the modification programmable logic controller is changed into the control instruction of starting, closing, suspending and the like.
The industrial control system communication method aims at improving the safety of the programmable logic controller in the industrial control system, eliminates the risk that the PLC is actively detected by external equipment in design, greatly improves the difficulty of directly attacking the PLC by malicious equipment, transfers the safety protection pressure of the PLC to an upper computer, and improves the overall safety of the industrial control system objectively.
In one embodiment, as shown in fig. 3, there is provided an industrial control system communication method, including:
s210, monitoring the communication port, and acquiring a connection request of the programmable logic controller in the local area network.
The upper computer monitors the communication port in real time to acquire a connection request of the programmable logic controller in the local area network.
And S220, establishing connection with the programmable logic controller according to the connection request.
And S230, acquiring the sensor data of the measuring point sent by the programmable logic controller.
The sensor data includes temperature sensor data and pressure sensor data, but of course, the sensor data may also include other types of sensor data.
And S240, sending a control instruction to the programmable logic controller according to the sensor data.
And after receiving the data of the sensor, the upper computer sends a control instruction to the programmable logic controller according to the data type of the sensor.
In one embodiment, after establishing a connection with the programmable logic controller according to the connection request, the method includes: and sending connection success information to the programmable logic controller.
And the programmable logic controller judges whether the connection with the upper computer is successful according to the connection success information.
It should be understood that although the various steps in the flow charts of fig. 2-3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-3 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 4, there is provided an industrial control system communication device, including: a communication connection module 310, a sensor data transmission module 320, and an execution module 330, wherein:
the communication connection module 310 is configured to acquire an address of an upper computer in the local area network, and establish a communication connection with the upper computer according to the address of the upper computer.
And a sensor data sending module 320, configured to send sensor data of the measurement point to the upper computer at a predetermined time interval.
And the execution module 330 is configured to acquire a control instruction sent by the upper computer according to the sensor data, and execute the control instruction.
In one embodiment, the communication connection module 310 is further configured to establish a communication connection with an upper computer in the local area network according to a pre-stored IP address of the upper computer; and/or, the device is also used for obtaining the address of the upper computer in the current local area network through a user datagram protocol, and establishing communication connection with the upper computer according to the address of the upper computer; and/or, the system is also used for establishing communication connection with an upper computer in the local area network through a three-layer routing exchange protocol.
In one embodiment, the industrial control system communication device further includes: the judging module is used for judging whether the connection with the upper computer is successful; the sensor data sending module 320 is further configured to send the sensor data of the measurement point to the upper computer at a predetermined time interval if the connection with the upper computer is successful.
In one embodiment, the industrial control system communication device further includes: the communication connection module 310 is further configured to, if the connection with the upper computer fails, obtain the address of the upper computer inside the local area network again after a preset time, and establish a communication connection with the upper computer according to the address of the upper computer.
In one embodiment, the control instructions include at least one of maintaining a current state, modifying a data point, modifying a programmable logic controller configuration, and modifying a programmable logic controller state.
For specific limitations of the industrial control system communication device, the above limitations on the industrial control system communication method can be referred to, and detailed descriptions thereof are omitted here. The various modules in the industrial control system communication device described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 6. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing control instruction data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement an industrial control system communication method.
Those skilled in the art will appreciate that the architecture shown in fig. 6 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
monitoring a communication port, and acquiring a connection request of a programmable logic controller in a local area network;
establishing connection with the programmable logic controller according to the connection request;
acquiring sensor data of a measuring point sent by the programmable logic controller;
and sending a control instruction to the programmable logic controller according to the sensor data.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
monitoring a communication port, and acquiring a connection request of a programmable logic controller in a local area network;
establishing connection with the programmable logic controller according to the connection request;
acquiring sensor data of a measuring point sent by the programmable logic controller;
and sending a control instruction to the programmable logic controller according to the sensor data.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An industrial control system communication method, the method comprising:
acquiring an upper computer address in a local area network, and establishing communication connection with an upper computer according to the upper computer address;
sending sensor data of the measuring points to the upper computer at preset time intervals;
and acquiring a control instruction sent by the upper computer according to the sensor data, and executing the control instruction.
2. The method according to claim 1, wherein the obtaining an address of an upper computer in a local area network and establishing a communication connection with the upper computer according to the address of the upper computer comprises:
establishing communication connection with an upper computer in the local area network according to a prestored IP address of the upper computer; and/or the presence of a gas in the gas,
acquiring an upper computer address in the current local area network through a user datagram protocol, and establishing communication connection with an upper computer according to the upper computer address; and/or the presence of a gas in the gas,
and establishing communication connection with an upper computer in the local area network through a three-layer routing exchange protocol.
3. The method of claim 1, further comprising:
judging whether the connection with the upper computer is successful;
and if the connection with the upper computer is successful, sending the sensor data of the measuring point to the upper computer at a preset time interval.
4. The method according to claim 3, after determining whether the connection with the upper computer is successful, further comprising:
and if the connection with the upper computer fails, acquiring the address of the upper computer in the local area network again after preset time, and establishing communication connection with the upper computer according to the address of the upper computer.
5. The method of claim 1, wherein the control instruction comprises at least one of maintaining a current state, modifying a data point, modifying a programmable logic controller configuration, modifying a programmable logic controller state.
6. An industrial control system communication method, the method comprising:
monitoring a communication port, and acquiring a connection request of a programmable logic controller in a local area network;
establishing connection with the programmable logic controller according to the connection request;
acquiring sensor data of a measuring point sent by the programmable logic controller;
and sending a control instruction to the programmable logic controller according to the sensor data.
7. The method of claim 6, after establishing a connection with the programmable logic controller in accordance with the connection request, comprising:
and sending connection success information to the programmable logic controller.
8. An industrial control system communication device, the device comprising:
the communication connection module is used for acquiring an upper computer address in a local area network and establishing communication connection with an upper computer according to the upper computer address;
the sensor data sending module is used for sending the sensor data of the measuring point to the upper computer at a preset time interval;
and the execution module is used for acquiring the control instruction sent by the upper computer according to the sensor data and executing the control instruction.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 5 or implements the steps of the method of any of claims 6 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7 or carries out the steps of the method of any one of claims 6 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824773.7A CN112073470A (en) | 2020-08-17 | 2020-08-17 | Industrial control system communication method and device, computer equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010824773.7A CN112073470A (en) | 2020-08-17 | 2020-08-17 | Industrial control system communication method and device, computer equipment and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112073470A true CN112073470A (en) | 2020-12-11 |
Family
ID=73661920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010824773.7A Pending CN112073470A (en) | 2020-08-17 | 2020-08-17 | Industrial control system communication method and device, computer equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112073470A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625654A (en) * | 2021-08-13 | 2021-11-09 | 杭州航民达美染整有限公司 | Industrial equipment remote control method and device based on PLC |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1492309A2 (en) * | 2003-06-23 | 2004-12-29 | The Boc Group, Inc. | Equipment area network |
| CN103648184A (en) * | 2013-12-06 | 2014-03-19 | 镇江坤泉电子科技有限公司 | Wireless local-area-network architecture technology in PLC communication |
| CN105945944A (en) * | 2016-05-18 | 2016-09-21 | 华东理工大学 | Remote real-time monitoring system for welding robot system |
| CN109032065A (en) * | 2018-09-25 | 2018-12-18 | 上海宏英智能科技有限公司 | A kind of PLC tele-control system |
| CN110315799A (en) * | 2019-06-27 | 2019-10-11 | 济宁科力光电产业有限责任公司 | A kind of remote monitoring system and method for servo-pressing machine production scene |
| CN111400384A (en) * | 2020-03-11 | 2020-07-10 | 广东溢达纺织有限公司 | Monitoring system, method, computer equipment and storage medium for sizing machine |
-
2020
- 2020-08-17 CN CN202010824773.7A patent/CN112073470A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1492309A2 (en) * | 2003-06-23 | 2004-12-29 | The Boc Group, Inc. | Equipment area network |
| CN103648184A (en) * | 2013-12-06 | 2014-03-19 | 镇江坤泉电子科技有限公司 | Wireless local-area-network architecture technology in PLC communication |
| CN105945944A (en) * | 2016-05-18 | 2016-09-21 | 华东理工大学 | Remote real-time monitoring system for welding robot system |
| CN109032065A (en) * | 2018-09-25 | 2018-12-18 | 上海宏英智能科技有限公司 | A kind of PLC tele-control system |
| CN110315799A (en) * | 2019-06-27 | 2019-10-11 | 济宁科力光电产业有限责任公司 | A kind of remote monitoring system and method for servo-pressing machine production scene |
| CN111400384A (en) * | 2020-03-11 | 2020-07-10 | 广东溢达纺织有限公司 | Monitoring system, method, computer equipment and storage medium for sizing machine |
Non-Patent Citations (2)
| Title |
|---|
| 刘利群: "无线局域网技术在PLC通讯中的应用", 《科技创新导报》 * |
| 张艳丽: "煤矿主扇风机监控系统人机交互平台的开发", 《中国优秀硕士学位论文全文数据库（工程科技I辑）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625654A (en) * | 2021-08-13 | 2021-11-09 | 杭州航民达美染整有限公司 | Industrial equipment remote control method and device based on PLC |
| CN113625654B (en) * | 2021-08-13 | 2022-03-29 | 杭州航民达美染整有限公司 | Industrial equipment remote control method and device based on PLC |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102178003B1 (en) | System for controlling network access and method thereof | |
| US20190179726A1 (en) | Monitoring method and apparatus of server, and storage medium | |
| CN112738805A (en) | Device control method and apparatus, storage medium, and electronic device | |
| JP2016537894A (en) | Security gateway for local / home networks | |
| CN111193768B (en) | Network data processing method and device, computer equipment and storage medium | |
| CN108768960B (en) | Virus detection method, device, storage medium and computer equipment | |
| US10044812B2 (en) | Communication device, terminal device, and computer program product | |
| CN114995214A (en) | Method, system, device, equipment and storage medium for remotely accessing application | |
| US11397806B2 (en) | Security monitoring device | |
| US11516229B2 (en) | Control device and control system | |
| CN111182537A (en) | Network access method, device and system for mobile application | |
| CN114124556B (en) | Network access control method, device, equipment and storage medium | |
| CN112073470A (en) | Industrial control system communication method and device, computer equipment and storage medium | |
| CN113438264B (en) | Wearable massager connection method, device, computer equipment and storage medium | |
| CN111600883A (en) | Vehicle diagnosis method and system, electronic equipment and storage medium | |
| CN109831521B (en) | Cache instance management method and device, computer equipment and storage medium | |
| CN114244566B (en) | Illegal external connection detection method and device based on IP address and computer equipment | |
| CN110650132A (en) | Access method and device of edge computing node, computer equipment and storage medium | |
| EP3910978B1 (en) | Method for detecting fake device and wireless device care apparatus | |
| KR102389936B1 (en) | ANALYZING VULNERABILITY SYSTEM AND IoT CARE SYSTEM ASSOCIATED THEREWITH | |
| CN109558148B (en) | Router plug-in installation method, device, equipment and storage medium | |
| CN111726429A (en) | Communication method, device, equipment and medium | |
| CN114095210A (en) | Method, system and storage medium for defending external connection based on security gateway | |
| EP3206423A1 (en) | Device and method for connecting devices to a network | |
| KR20170141207A (en) | How to Protect Connected Devices on the Network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 10 / F, building 4, 188 Lianchuang street, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province 310000 Applicant after: Zhejiang Mulian Internet of things Technology Co.,Ltd. Address before: 10 / F, building 4, 188 Lianchuang street, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province 310000 Applicant before: Hangzhou wooden chain Internet of things Technology Co.,Ltd. |
|
| CB02 | Change of applicant information |