CN105988408A - VPN-based programmable logic controller (PLC) remote diagnostic device and application thereof - Google Patents
VPN-based programmable logic controller (PLC) remote diagnostic device and application thereof Download PDFInfo
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- CN105988408A CN105988408A CN201510043655.1A CN201510043655A CN105988408A CN 105988408 A CN105988408 A CN 105988408A CN 201510043655 A CN201510043655 A CN 201510043655A CN 105988408 A CN105988408 A CN 105988408A
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Abstract
The present invention relates to a VPN-based programmable logic controller (PLC) remote diagnostic device and the application thereof, wherein the device is used for the diagnosis of PLCs. The diagnostic device comprises a VPN access switch and a computer provided with a PLC diagnostic program. The VPN access switch is connected to a plurality of PLCs and is connected with the computer through an operator VPN network. Compared with the prior art, an SCADA control system can be maintained and repaired remotely based on the remote diagnostic method of the VPN-based control system. Therefore, the condition that people must rush to the spot to maintain the SCADA control system can be reduced. Meanwhile, the maintenance efficiency of the SCADA control system is improved.
Description
Technical field
The present invention relates to a kind of PLC diagnostic techniques, especially relate to a kind of PLC based on VPN and remotely diagnose
Equipment and application thereof.
Background technology
Along with industrial system degree of dependence daily to SCADA technology is increasingly tight, SCADA system self-operating
Reliability and security requirement more and more higher, especially SCADA system is multi-point and wide-ranging, system layout disperse,
With greater need for a kind of Remote Diagnosis System, such that it is able to implement system fault diagnosis and reparation at a distance.City gas
The extensive region in city is spread all over each website of tap water pipe network monitoring SCADA system, after system puts into operation, its
Operational reliability and safety directly influence the safety of city operations, to this, how to realize SCADA system
Self diagnosis and Remote Diagnosis System, be an up the important leverage of SCADA system safe and reliable operation index.
Wherein, Chinese patent CN 201839319U discloses a kind of PLC remote diagnosis control system, has
PLC and by the host computer PC of user operation, PLC and host computer PC are by GPRS data network and Yin Te
Net is attached, and GPRS data network includes GPRS remote debugging module and GPRS remote debugging module
The GPRS data transmission terminal being connected and the GPRS mobile network being connected with GPRS data transmission terminal,
PLC, GPRS remote debugging module, GPRS data transmission terminal, GPRS mobile network, the Internet and on
Position machine PC is sequentially connected, by GPRS GPRS (general packet radio service).But this remote diagnosis control system one
Being not have autgmentability, two is to carry out data transmission easily occurring data to be held as a hostage by GPRS, dangerous.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide a kind of based on VPN
PLC remote diagnostic device and application thereof.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of PLC remote diagnostic device based on VPN, is used for diagnosing PLC programmable logic controller (PLC), bag
Include VPN access switch and the computer equipped with PLC diagnotor, described VPN access switch
Connect multiple PLC programmable logic controller (PLC), and be connected with computer by operator's VPN.
It is equipped with opc server between described VPN access switch and each PLC programmable logic controller (PLC).
Described diagnostic device also includes database server and Web server, the plurality of opc server all with
Database server connects, and described database server is also connected with Web server.
Described diagnostic device also includes the monitoring service for monitoring PLC programmable logic controller (PLC) running status
Device, the plurality of opc server is all connected with monitoring server.
The application process of a kind of PLC remote diagnostic device based on VPN, comprises the following steps:
A., when needs remotely diagnose, computer passes through operator's VPN to VPN access switch
Send and start password, and set up the communication connection between computer and PLC programmable logic controller (PLC)；
B. PLC programmable logic controller (PLC) is carried out diagnosing maintenance by computer by PLC diagnotor.
Communication connection in described step A is set up process and is included:
A1. computer sets up communication connection with VPN access switch；
A2.VPN access switch sets up the connection with PLC programmable logic controller (PLC) by opc server,
And then set up the communication connection of computer and PLC programmable logic controller (PLC).
In described step B, if computer is connected disconnection with operator VPN, then disconnects VPN and access and hand over
Change planes and communication connection between PLC programmable logic controller (PLC).
Compared with prior art, the invention have the advantages that
1) present invention proposes a kind of to improve system overhaul efficiency, can predict the control based on VPN of system hidden trouble
System remote diagnostic method, for the maintenance reparation of SCADA control system, can be carried out at far-end, reduces people
Member rushes towards the situation of field maintenance, can improve the maintenance efficiency of SCADA control system.
2) after realizing remotely diagnosis, facilitate the location of the system failure, lookup, improve error correction efficiency, it is possible to be notable
Improve the efficiency of system maintenance, it is to avoid the phenomenon of mistaken diagnosis erroneous judgement, improve SCADA control system maintaining quality.
3) use operator's VPN of wired mode remotely to connect, connect more stable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one；
Fig. 2 is the structural representation of the embodiment of the present invention two；
Wherein: 1, computer, 2, operator's VPN, 3, VPN access switch, 4, PLC can compile
Journey logic controller, 5, opc server, 6, database server, 7, Web server, 8, monitoring clothes
Business device.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the technology of the present invention side
Implement premised on case, give detailed embodiment and concrete operating process, but the protection model of the present invention
Enclose and be not limited to following embodiment.
Embodiment one:
A kind of PLC remote diagnostic device based on VPN, is used for diagnosing PLC programmable logic controller (PLC) 4, bag
Include VPN access switch 3 and the computer 1 equipped with PLC diagnotor, VPN access switch 3
Connect multiple PLC programmable logic controller (PLC) 4, and be connected with computer 1 by operator's VPN 2.
Computer 1 is notebook, selects ThinkPad E540 (20C6A0EKCD), configures as follows:
Intel(R)Core E5402.66GHz,12MB cache,5.86GT/s QPI；
Integrated gigabit Ethernet；
4GB internal memory, 1333MHz DIMM；
300GB 2.5 inch hard.
VPN access switch 3 selects Huawei's S5012G switch, and S5012G is a to have relatively high performance-price ratio
The network switch, for collecting, controlling special data and realize Ethernet I/O operation and design.This untreated
Temperature operating ranges can be expanded to 40 DEG C of to 70 DEG C, its MTBF by switch can be more than 2,000,000 hours.108TX
Support that speed is the whole of 1.0Gb/s or semiduplex operation.
S5012G Series Intelligent elasticity Ethernet switch be Huawei-3COM Corp. for design and build high resiliency,
High intelligent network demand and the Ethernet switch product released.System uses the IRF of Huawei-3COM Corp.'s innovation
(Intelligent Resilient Framework, intelligent elastic framework) technology, by scattered for multiple stage equipment composition system
The switching matrix of one, be highly suitable as paying close attention to autgmentability, reliability, safety and the Office Network of ease of manageability,
Service network and the convergence of residence network and access-layer switch.
Above-mentioned remote diagnostic device uses process, comprises the following steps:
The most in the normal state, PLC programmable logic controller (PLC) 4 and VPN access switch 3 are in isolation
State, PLC programmable logic controller (PLC) 4 telecommunication is not activated, when needs remotely diagnose, logical
Cross special secret key and untie PLC programmable logic controller (PLC) 4 remote lock, it may be assumed that computer 1 accesses to VPN
Switch 3 sends and starts password, and sets up the communication between computer 1 and PLC programmable logic controller (PLC) 4
Connect；
B. PLC programmable logic controller (PLC) 4 is diagnosed by computer 1 by PLC diagnotor
Safeguard；
Communication connection in step A is set up process and is included:
A1. computer 1 sets up communication connection with VPN access switch 3；
A2.VPN access switch 3 sets up the connection with PLC programmable logic controller (PLC) 4, and then sets up meter
Calculation machine 1 and the communication connection of PLC programmable logic controller (PLC) 4.
In step B, if computer 1 is connected disconnection with operator VPN 2, then disconnects VPN and access and hand over
Change planes the communication connection between 3 and PLC programmable logic controller (PLC)s 4.
Staff passes through the PLC diagnotor RSLogix on computer 1 to PLC FPGA
Controller 4 carry out PLC configuration detection, to the expansion of PLC program, edit and operate.Its start-up course is such as
Under: open PLC programmed environment RSLogix 5000, and be set in ray mode, be connected with PLC.
Embodiment two:
The present embodiment no longer describes with the something in common of embodiment one, only describes difference.
The present embodiment is with the dramatically different of embodiment one, and in the present embodiment, VPN access switch 3 is with multiple
Opc server 5 it is equipped with between PLC programmable logic controller (PLC) 4.
Diagnostic device also includes database server 6 and Web server 7, and multiple opc servers 5 are all with several
Connecting according to storehouse server 6, database server 6 is also connected with Web server 7.
Diagnostic device also includes the monitoring server 8 for monitoring PLC programmable logic controller (PLC) 4 running status,
Multiple opc servers 5 are all connected with monitoring server 8.
The application process of the present embodiment comprises the following steps:
A., when needs remotely diagnose, computer 1 accesses friendship by operator's VPN 2 to VPN
3 transmissions of changing planes start password, and set up the communication link between computer 1 and PLC programmable logic controller (PLC) 4
Connect；
B. PLC programmable logic controller (PLC) 4 is diagnosed by computer 1 by PLC diagnotor
Safeguard；
Communication connection in step A is set up process and is included:
A1. computer 1 sets up communication connection with VPN access switch 3；
A2.VPN access switch 3 is set up and PLC programmable logic controller (PLC) 4 by opc server 5
Connection, and then set up the communication connection of computer 1 and PLC programmable logic controller (PLC) 4, PLC is able to programme
After logic controller 4 unties remote lock, the signal procedure RSLinx through being arranged on opc server 5, adopts
Use OPC mode, access VPN wide area network, with the connection that the computer 1 of the network other end realizes physical link.
In step B, if computer 1 is connected disconnection with operator VPN 2, then disconnects VPN and access and hand over
Change planes the communication connection between 3 and PLC programmable logic controller (PLC)s 4.
By the safety of VPN, this remote diagnostic device can ensure that the fortune of PLC programmable logic controller (PLC) 4
Row safety and the information security of notebook.
Claims (7)
1. a PLC remote diagnostic device based on VPN, is used for diagnosing PLC programmable logic controller (PLC),
It is characterized in that, including VPN access switch with equipped with the computer of PLC diagnotor, described
VPN access switch connects multiple PLC programmable logic controller (PLC)s, and by operator's VPN and meter
Calculation machine connects.
A kind of PLC remote diagnostic device based on VPN the most according to claim 1, it is characterised in that
It is equipped with opc server between described VPN access switch and each PLC programmable logic controller (PLC).
A kind of PLC remote diagnostic device based on VPN the most according to claim 2, it is characterised in that
Described diagnostic device also includes database server and Web server, and the plurality of opc server is all and data
Storehouse server connects, and described database server is also connected with Web server.
A kind of PLC remote diagnostic device based on VPN the most according to claim 2, it is characterised in that
Described diagnostic device also includes the monitoring server for monitoring PLC programmable logic controller (PLC) running status, institute
State multiple opc server to be all connected with monitoring server.
5. an application process for PLC remote diagnostic device based on VPN as claimed in claim 2, its
It is characterised by, comprises the following steps:
A., when needs remotely diagnose, computer passes through operator's VPN to VPN access switch
Send and start password, and set up the communication connection between computer and PLC programmable logic controller (PLC)；
B. PLC programmable logic controller (PLC) is carried out diagnosing maintenance by computer by PLC diagnotor.
The application process of a kind of PLC remote diagnostic device based on VPN the most according to claim 5,
It is characterized in that, the communication connection in described step A is set up process and is included:
A1. computer sets up communication connection with VPN access switch；
A2.VPN access switch sets up the connection with PLC programmable logic controller (PLC) by opc server,
And then set up the communication connection of computer and PLC programmable logic controller (PLC).
The application process of a kind of PLC remote diagnostic device based on VPN the most according to claim 5,
It is characterized in that, in described step B, if computer is connected disconnection with operator VPN, then disconnect VPN
Communication connection between access switch and PLC programmable logic controller (PLC).
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| CN201510043655.1A CN105988408A (en) | 2015-01-28 | 2015-01-28 | VPN-based programmable logic controller (PLC) remote diagnostic device and application thereof |
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| CN106597972A (en) * | 2017-01-19 | 2017-04-26 | 沈阳东软医疗系统有限公司 | Remote control system |
| CN107179750A (en) * | 2016-03-11 | 2017-09-19 | 西门子（中国）有限公司 | Industrial network system |
| CN107659481A (en) * | 2017-08-09 | 2018-02-02 | 高斯贝尔数码科技股份有限公司 | Long-range control method, device and storage medium based on Virtual Private Network |
| CN108983699A (en) * | 2018-09-25 | 2018-12-11 | 辽宁工业大学 | Three-axis numerical control drilling machine control system and its control method based on PLC |
| 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 |
| CN109831443A (en) * | 2019-02-26 | 2019-05-31 | 武汉科技大学 | Industrial control network attacking and defending experiment porch and Hardware In The Loop Simulation Method |
| CN109901498A (en) * | 2017-12-08 | 2019-06-18 | 上海远动科技有限公司 | A kind of remotely monitoring fuel gas leak alarm systems and its monitoring method |
| CN110427297A (en) * | 2019-07-10 | 2019-11-08 | 西门子工厂自动化工程有限公司 | Diagnostic message acquisition methods, system and gateway and computer-readable medium |
| CN114137894A (en) * | 2021-10-19 | 2022-03-04 | 广州鲁邦通物联网科技股份有限公司 | VPN-based PLC remote diagnosis system and technology |
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| CN109831443A (en) * | 2019-02-26 | 2019-05-31 | 武汉科技大学 | Industrial control network attacking and defending experiment porch and Hardware In The Loop Simulation Method |
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| CN110427297B (en) * | 2019-07-10 | 2023-08-04 | 西门子工厂自动化工程有限公司 | Diagnostic information acquisition method, system, gateway and computer readable medium |
| CN114137894A (en) * | 2021-10-19 | 2022-03-04 | 广州鲁邦通物联网科技股份有限公司 | VPN-based PLC remote diagnosis system and technology |
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Application publication date: 20161005 |