CN115442202B - Virtual PLC control method and system for 5G network cloud-end cooperation - Google Patents
Virtual PLC control method and system for 5G network cloud-end cooperation Download PDFInfo
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- H—ELECTRICITY
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Abstract
The invention provides a virtual PLC control method and a virtual PLC control system for 5G network cloud-end coordination, which comprise cloud platform basic service deployment and interaction of an I/O module and cloud information, wherein a virtualization technology is used for abstracting and constructing a logic resource layer by a part of physical resources in a cloud server, an application deployment is supported by installing a strong real-time operating system, a development environment and an operation environment of a software defined PLC are deployed, a single software defined PLC resource is subdivided, a plurality of virtual PLCs are configured in a virtualized mode, a CPU part of PLC controller hardware is replaced functionally, hardware driving and system interface abstract design is adopted, and the software defined PLC and the I/O module are connected in a communication mode, so that a control effect is achieved. The virtual PLC control method of 5G network cloud-end cooperation is innovatively developed, so that the PLC is directly communicated with an industrial Internet platform and has interoperability, the modification and upgrading of the PLC are not dependent on specific manufacturers, and the virtual PLC is an important measure for realizing ERP, MES and industrial APP direct drive control systems in the future and realizing big data drive agility control.
Description
Technical Field
The invention relates to the technical field of PLC control, in particular to a virtual PLC control method and system for 5G network cloud-end cooperation.
Background
At present, industrial Internet of things control needs to process mass field data in real time and output control instructions, a data driving control model needs to use offline and online data in a mixed mode, various network connections make the control system architecture become more complex, and requirements of high-capacity network bandwidth, high-performance computing resources, a self-adaptive software architecture and an intelligent computing framework are provided for the control system. Cloud computing with adaptability and agility can be regarded as an effective solution applied to future industrial automation systems, and a 5G communication network has the characteristics of low time delay, large bandwidth, wide connection and the like, and the fusion of 5G and cloud computing can widely and deeply promote the application development of information technology.
The traditional PLC hardware manufacturers all have own communication protocols and have the characteristics of non-openness, inextensibility and incompatibility, which are very restricted to hardware integration and control capability expansion. The invention innovatively develops a virtual PLC control method of 5G network cloud-end cooperation, researches a cloud centralized control technology under a 5G network, adopts an industrial automation architecture of a cloud service fusion control mode, transmits control instructions as services to field devices through a 5G network, enables the PLC to be directly communicated with an industrial Internet platform, has interoperability, realizes intellectualization and self-perception, modifies and upgrades the PLC without depending on specific manufacturers, and is an important measure for realizing ERP, MES and industrial APP direct drive control systems in the future and realizing big data drive agility control.
Disclosure of Invention
In order to solve the technical problems of the background technology, the invention provides a virtual PLC control method and a system for 5G network cloud-end coordination, innovatively develops the virtual PLC control method for 5G network cloud-end coordination, researches cloud control technology under a 5G network, adopts an industrial control architecture fused by a cloud network, and transmits control instructions as services to field devices through a 5G network by deploying a software-defined PLC in a private cloud server, so that the PLC is directly communicated with an industrial Internet platform to have interoperability, realize intellectualization and self-perception, and modify and upgrade the PLC without depending on specific manufacturers, thereby being an important measure for realizing ERP, MES and industrial APP direct drive control system in the future and realizing big data drive agility control.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
A virtual PLC control method for 5G network cloud-end cooperation comprises the following steps:
Step one, cloud platform basic service deployment
Utilizing virtualization technology to abstract and construct a logic resource layer for a part of physical resources in a cloud server, installing a strong real-time operating system to support application deployment, deploying a development environment and an operation environment of a software-defined PLC (programmable logic controller), including core components such as equipment configuration, algorithm configuration, compiling debugger and the like, supporting cyclic, periodic and triggered scheduling, integrating multiple protocol functions of Ethernet and field bus, re-segmenting single software-defined PLC resources, virtualizing and configuring a plurality of virtual PLCs, functionally replacing a CPU part of PLC controller hardware, abstracting and designing hardware drive and system interfaces, and establishing communication connection between the software-defined PLC and an I/O module;
step two, the I/O module interacts with cloud information
By means of the 5G+MEC high-quality network, the I/O module is connected with the 5G gateway and the cloud virtual PLC to establish cloud-end 4.9GHz private network communication, communication protocol conversion is set between the 5G gateway and the virtual PLC respectively, information interaction between the cloud virtual PLC and the I/O module is achieved, signals collected by the I/O module are directly transmitted to the cloud through the 5G communication, the cloud virtual PLC operates a control program on line, and control instructions 5G communication are transmitted to the I/O module to achieve a control effect.
In the first step, the upper layer divides three virtual spaces in the cloud server, deploys a VPN server, a virtual PLC and a cloud SCADA respectively, and performs data exchange between the outside and the cloud through a unique interface of the VPN server, and meanwhile, the VPN server also has a cloud firewall function, so that safety control is facilitated; the lower layer only reserves the hardware of the acquisition module, and the virtual PLC on the cloud server realizes the logic control function.
Further, the cloud end from the cloud server to the PLC is in wireless communication through a 5G private network, wherein the 5G network architecture adopts a UPF function to sink to the network edge to deploy MEC (media access control) mode, the MEC cluster is deployed at a position close to an application scene in an industrial park, and service data after the application scene terminal is accessed is locally shunted through the UPF, so that the service data does not need to be transmitted to a public network.
Further, the interaction between the I/O module and the cloud information in the second step includes the following steps:
Step 201, configuring internal address information of an I/O module, including an IP address of an I/O device and an IP address of a gateway;
step 202, configuring communication parameters of an I/O module, including baud rate setting, protocol selection, channel number definition, allowable delay time and overtime setting;
step 203, configuring internal network information of the 5G gateway, including adding a network interface and adding port forwarding; adding a LAN port, and receiving and transmitting a data packet; adding port forwarding, and establishing a signal transmission channel between the I/O module and the gateway;
204, adding hardware configuration to the cloud server control software to form a control framework, setting a management IP address for the virtual PLC, adding two virtual communication network ports, wherein the first virtual port is used for 5G communication protocol conversion, and the second virtual communication port is used for transmitting control signals;
Step 205, the hardware configuration adopts an open flexible bus protocol, and the maximum allowable network delay time is set; setting an IP address, the number of channels, a read-write type and an I/O variable address of an I/O module, and setting a register type of an I/O card.
The open flexible bus protocol is Modbus bus protocol.
Further, the virtualization technology is as follows: one physical hardware is virtualized into a plurality of hardware platforms, resources can be allocated and dynamically adjusted according to requirements, and the physical resources comprise a CPU core, a memory and a network card.
Further, the 5G network and the cloud server are combined to form a flattened cloud system architecture design, the sensor and the actuator are directly connected with the cloud, and the system integrates multiple functions of data acquisition, industrial control and artificial intelligence, and has the advantages of elastic expansion and flexible expansion.
Further, the cloud server provides an operation environment fused with real-time and non-real-time multi-application, the PLC control and the data acquisition are used as real-time applications, and the cloud SCADA and the database are used as non-real-time applications.
The invention also provides a virtual PLC control system for the 5G network cloud-end coordination, which comprises a cloud server, a 5G gateway and an I/O module.
The cloud server divides three virtual spaces, and a VPN server, a virtual PLC and a cloud SCADA are deployed respectively;
By means of the 5G+MEC high-quality network, the I/O module is connected with the 5G gateway to establish wireless communication with the cloud virtual PLC, and the virtual PLC performs signal acquisition and control through the I/O module.
The invention also provides a processor of the computer, which is used for the cloud server, and the processor runs the control method.
Compared with the prior art, the invention has the beneficial effects that:
1) The invention innovatively develops a virtual PLC control method of 5G network cloud-end coordination, researches a cloud centralized control technology under a 5G network, adopts an industrial control architecture of cloud network integration, transmits control instructions as services to field devices through a 5G network, enables the PLC to be directly communicated with an industrial Internet platform to have interoperability, realizes intellectualization and self-perception, modifies and upgrades the PLC without depending on specific manufacturers, and is an important measure for realizing ERP, MES and industrial APP direct drive control systems in the future and realizing big data drive agility control;
2) After the system is applied, the 5G network reduces time delay, reduces intermediate cables and equipment, and enlarges the moving range of equipment terminals;
3) The network is easy to upgrade, and the virtual control system deployed by the cloud server has high flexibility and can be expanded, so that diversified use requirements are met;
4) The virtual communication interface is flexibly connected with various protocols, supports interconnection of equipment of multiple manufacturers, realizes cloud cooperative control, and improves production efficiency.
Drawings
FIG. 1 is a system network architecture diagram;
FIG. 2 is a schematic diagram of virtual PLC control for 5G network cloud-side collaboration;
Fig. 3 is a network interface and port forwarding configuration diagram.
Detailed Description
The following detailed description of the embodiments of the invention is provided with reference to the accompanying drawings.
After the 5G network cloud-end collaborative virtual PLC control method is applied to the full coverage of 5G signals, equipment signals are collected by a PLC controller I/O module and are transmitted to a cloud server through a 5G gateway in a wireless mode, a virtual interface protocol of a virtual real-time control system (virtual PLC) deployed by the cloud server converts received signals, a logic control program is operated to output control signals and the control signals are reversely transmitted to the PLC I/O module in a wireless mode, and therefore cloud control of PLC associated equipment is achieved.
As shown in fig. 1-2, the control method of the present invention comprises the steps of:
Step one, cloud platform basic service deployment
Utilizing virtualization technology to abstract and construct a logic resource layer for a part of physical resources in a cloud server, installing a strong real-time operating system to support application deployment, deploying a development environment and an operation environment of a software-defined PLC (programmable logic controller), including core components such as equipment configuration, algorithm configuration, compiling debugger and the like, supporting cyclic, periodic and triggered scheduling, integrating multiple protocol functions of Ethernet and field bus, re-segmenting single software-defined PLC resources, virtualizing and configuring a plurality of virtual PLCs, functionally replacing a CPU part of PLC controller hardware, abstracting and designing hardware drive and system interfaces, and establishing connection between the software-defined PLC and an I/O module;
step two, the I/O module interacts with cloud information
By means of a 5G+MEC high-quality network, the I/O module is connected with the 5G gateway and the cloud virtual PLC to establish cloud-end 4.9GHz private network communication, communication protocol conversion is set between the 5G gateway and the virtual PLC respectively, information interaction between the cloud virtual PLC and the I/O module is achieved, signals collected by the I/O module are directly transmitted to the cloud through the 5G communication, an engineer computer is connected with the CPE to realize that a control program is compiled and downloaded to the cloud virtual PLC in an off-line mode, the PLC operates the control program on line, control instructions are transmitted to the I/O module to achieve a control effect, for example, the I/O module transmits a start-stop signal to a frequency converter, and a remote control motor starts and stops operating.
1. Network architecture
As shown in fig. 1, the network architecture of the present invention is: the upper layer divides three virtual spaces in the cloud server, deploys a VPN server, a virtual PLC and a cloud SCADA respectively, and the outside and the cloud exchange data through a unique interface of the VPN server, and meanwhile, the VPN server also has a cloud firewall function, so that safety control is facilitated; the lower layer only reserves the hardware of the acquisition module, and the virtual PLC on the cloud server realizes the logic control function. The cloud end from the cloud server to the PLC is in wireless communication through a 5G private network, wherein the 5G network architecture is submerged to the network edge by adopting a UPF function to deploy MEC (unified Messaging service) mode, the MEC cluster is deployed at a position close to an application scene in an industrial park, and service data after the application scene terminal is accessed is locally shunted through the UPF, so that the service data does not need to be retransmitted to a public network.
2. I/O module and cloud information interaction
The interaction between the I/O module and the cloud information comprises the following steps:
Step 201, configuring internal address information of an I/O module, including an IP address of an I/O device and an IP address of a gateway;
step 202, configuring communication parameters of an I/O module, including baud rate setting, protocol selection, channel number definition, allowable delay time and overtime setting;
step 203, configuring internal network information of the 5G gateway, including adding a network interface and adding port forwarding; adding a LAN port, and receiving and transmitting a data packet; adding port forwarding, and establishing a signal transmission channel between the I/O module and the gateway;
204, adding hardware configuration to the cloud server control software to form a control framework, setting a management IP address for the virtual PLC, adding two virtual communication network ports, wherein the first virtual port is used for 5G communication protocol conversion, and the second virtual communication port is used for transmitting control signals;
Step 205, the hardware configuration adopts an open flexible bus protocol, and the maximum allowable network delay time is set; setting an IP address, the number of channels, a read-write type and an I/O variable address of an I/O module, and setting a register type of an I/O card.
The open flexible bus protocol is Modbus bus protocol.
3. The software architecture of the control platform is as follows:
The 5G network and the cloud server are combined to form a flattened cloud system architecture design, the sensor and the actuator are directly connected with the cloud, and the system integrates multiple functions of data acquisition, industrial control and artificial intelligence, and has the advantages of elastic expansion and flexible expansion. The cloud server provides an operation environment for fusing real-time and non-real-time multi-application, the PLC control and the data acquisition are used as real-time applications, the cloud SCADA and the database are used as non-real-time applications, physical resources are reasonably distributed, and multi-service security isolation operation is realized. Decoupling control logic from special hardware functions, constructing a control system in a software-defined mode, installing a control kernel in a real-time operating environment, and installing development software and cloud SCADA in a non-real-time operating environment. The software supports 5 programming languages of IEC61131-3 standard, supports ModbusTCP, OPCUA, MQTT, ethernet/IP and other open bus protocols, and can perform operations such as equipment, variable, algorithm configuration, redundancy configuration, online diagnosis and debugging. The cloud SCADA comprises three software including monitoring operation, configuration management and system structure. The monitoring operation software reflects the real-time operation condition of the field hardware equipment, the configuration management software has the functions of multi-person configuration, monitoring configuration, configuration release and position number searching, and the system structure software has the functions of engineering creation, engineer authority configuration and the like.
4. Specific examples: and the cloud virtual PLC establishes communication with the SIEMENSI/O module to control the start-stop variable-speed operation of the motor.
1. 5G gateway multimode setting
1) The 5G gateway basic network information is configured, including adding network interfaces and adding port forwarding as shown in figure 3. And adding a LAN port, receiving and transmitting the data packet, and establishing a signal transmission channel between the I/O module and the gateway.
2) And adding 503 ports for forwarding, and importing the developed Modbus protocol and Profibus protocol conversion packets in data acquisition communication to complete protocol conversion.
2. Cloud virtual PLC configuration construction and variable configuration
1) The cloud server development software is added with hardware configuration to form a control framework, a management IP address is set for the virtual PLC controller, two virtual communication network ports are added, a 1-1 virtual port is used for 5G communication protocol conversion, and a 1-2 virtual communication port is used for transmitting control signals. The hardware configuration adopts an open flexible Modbus bus protocol, and the maximum allowable network delay time is set.
2) The protocol conversion also needs to configure I/O point variable transmission at the cloud, transmit the variable value of the PLC in the slave station to the virtual PLC variable at the cloud, and configure a Modbus variable-S7 variable link table which comprises variable names, types and communication parameters.
3) On-line-compile-off-line downloading-running, the presence display networkconnected indicates that the virtual PLC running was successful on-line.
4) The cloud development software adds I/O module configuration, sets the IP address, the number of channels, the read-write type and the I/O card setting register type of the AI/O module, sets 3 channels respectively, sets the address of the I/O variable card continuously for each module, sets the address 0-2 as read, the address 3-5 as write, sets the 3 variable as WORD WORD for writing the register control WORD, and sets the UNIT for writing the rotation speed of the register motor.
5) After the configuration is completed, the cloud virtual PLC and the SIEMENSI/O module successfully establish communication, software is used for writing a control motor operation program, the control motor operation program is downloaded into the cloud virtual PLC through VPN, and the start-stop variable speed operation of the motor is controlled.
5. Virtual PLC control system with 5G network cloud-end cooperation
The invention also provides a virtual PLC control system for 5G network cloud-end coordination, which is shown in figures 1-2 and comprises a cloud server, a 5G gateway and an I/O module;
the cloud server divides three virtual spaces, and a VPN server, a virtual PLC and a cloud SCADA are deployed respectively;
By means of the 5G+MEC high-quality network, the I/O module is connected with the 5G gateway to establish wireless communication with the cloud virtual PLC, the cloud virtual PLC interacts with the I/O module in information, and the virtual PLC performs signal acquisition and control through the I/O module.
6. Processor of computer
The invention also provides a processor of the computer, which is used for the cloud server, and the processor runs the control method.
The above examples are implemented on the premise of the technical scheme of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the above examples. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (8)
1. A virtual PLC control method for 5G network cloud-end cooperation is characterized by comprising the following steps:
Step one, cloud platform basic service deployment
Utilizing virtualization technology to abstract and construct a logic resource layer for a part of physical resources in a cloud server, installing a strong real-time operating system to support application deployment, deploying a development environment and an operation environment of a software-defined PLC (programmable logic controller), comprising equipment configuration, algorithm configuration, compiling a debugger core component, supporting cyclic, periodic and triggered scheduling, integrating multiple protocol functions of Ethernet and field bus, re-segmenting single software-defined PLC resources, virtualizing and configuring a plurality of virtual PLCs, functionally replacing a CPU part of PLC controller hardware, carrying out hardware driving and system interface abstract design, and establishing communication connection between the software-defined PLC and an I/O module;
step two, the I/O module interacts with cloud information
By means of the 5G+MEC high-quality network, the I/O module is connected with the 5G gateway and the cloud virtual PLC to establish cloud-end 4.9GHz private network communication, communication protocol conversion is set between the 5G gateway and the virtual PLC respectively, information interaction between the cloud virtual PLC and the I/O module is achieved, signals collected by the I/O module are directly transmitted to the cloud through the 5G communication, the cloud virtual PLC operates a control program on line, and control instructions 5G communication are transmitted to the I/O module to achieve a control effect.
2. The method for controlling the virtual PLC in the 5G network cloud-end coordination according to claim 1, wherein in the first step, the upper layer divides three virtual spaces in the cloud server, deploys a VPN server, a virtual PLC and a cloud SCADA respectively, the outside and the cloud exchange data through a unique interface of the VPN server, and meanwhile the VPN server also has a cloud firewall function, so that safety control is facilitated; the lower layer only reserves the hardware of the acquisition module, and the virtual PLC on the cloud server realizes the logic control function.
3. The virtual PLC control method for 5G network cloud-end coordination according to claim 1, wherein cloud-end from a cloud server to an I/O module is in wireless communication through a 5G private network, wherein a 5G network architecture adopts a UPF function to sink to a network edge to deploy MEC mode, MEC clusters are deployed at positions, close to an application scene, in an industrial park, and service data after the application scene terminal is accessed is distributed locally through the UPF without being transmitted to a public network.
4. The virtual PLC control method for 5G network cloud-end coordination according to claim 1, wherein the interaction between the I/O module and the cloud information in the second step includes the following steps:
Step 201, configuring internal address information of an I/O module, including an IP address of an I/O device and an IP address of a gateway;
step 202, configuring communication parameters of an I/O module, including baud rate setting, protocol selection, channel number definition, allowable delay time and overtime setting;
step 203, configuring internal network information of the 5G gateway, including adding a network interface and adding port forwarding; adding a LAN port, and receiving and transmitting a data packet; adding port forwarding, and establishing a signal transmission channel between the I/O module and the gateway;
204, adding hardware configuration to the cloud server control software to form a control framework, setting a management IP address for the virtual PLC, adding two virtual communication network ports, wherein the first virtual port is used for 5G communication protocol conversion, and the second virtual communication port is used for transmitting control signals;
Step 205, the hardware configuration adopts an open flexible bus protocol, and the maximum allowable network delay time is set; setting an IP address, the number of channels, a read-write type and an I/O variable address of an I/O module, and setting a register type of an I/O card.
5. The method for controlling a virtual PLC in a 5G network cloud-side collaboration according to claim 4, wherein the open flexible bus protocol is a Modbus bus protocol.
6. The method for controlling the virtual PLC in cloud-end coordination of a 5G network according to claim 1, wherein the virtualization technology is as follows: one physical hardware is virtualized into a plurality of hardware platforms, resources are allocated and dynamically adjusted according to requirements, and the physical resources comprise CPU cores, memories and network cards.
7. The virtual PLC control method for 5G network cloud-end coordination according to claim 1, wherein the 5G network and a cloud server are combined to form a flattened cloud system architecture design, a sensor and an actuator are directly connected with a cloud, and the method integrates multiple functions of data acquisition, industrial control and artificial intelligence and has the advantages of elastic expansion and flexible expansion.
8. The method for controlling the virtual PLC in the 5G network cloud-end coordination according to claim 1, wherein the cloud server provides a real-time and non-real-time multi-application fused operation environment, the PLC control and the data acquisition are used as real-time applications, and the cloud SCADA and the database are used as non-real-time applications.
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| CN115967732A (en) * | 2022-12-23 | 2023-04-14 | 中国联合网络通信集团有限公司 | Container cloud chemical engineering control system and method |
| CN117234146B (en) * | 2023-11-15 | 2024-02-27 | 北京科技大学 | Cloud PLC multi-protocol I/O equipment remote control method and system |
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