CN113448282A - Wireless network control connection method based on redundancy control system - Google Patents
Wireless network control connection method based on redundancy control system Download PDFInfo
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- 102100026205 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-1 Human genes 0.000 description 6
- 101000691599 Homo sapiens 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-1 Proteins 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 101100190617 Arabidopsis thaliana PLC2 gene Proteins 0.000 description 4
- 101100408456 Arabidopsis thaliana PLC8 gene Proteins 0.000 description 4
- 101100464304 Caenorhabditis elegans plk-3 gene Proteins 0.000 description 4
- 101100093534 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RPS1B gene Proteins 0.000 description 4
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/052—Linking several PLC's
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14014—Redundant processors and I-O
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Abstract
The invention discloses a wireless network control connection method based on a redundancy control system, which comprises the following steps: the control layer PLC equipment is connected with the control layer gateway, and the command sent by the control layer PLC equipment is transmitted through the control layer gateway; the control layer PLC redundant equipment is connected with the control layer redundant gateway and transmits the instruction through the control layer redundant gateway; the control layer gateway and the control layer redundant gateway are connected with the multi-level equipment layer gateway, and data or instructions are transmitted between the control layer gateway and the control layer redundant gateway and the multi-level equipment layer gateway through a 5G link or a WiFi6 link; the multi-level equipment layer gateway transmits the received instruction to a corresponding connecting terminal to execute the instruction sent by the PLC equipment of the control layer; the system redundancy mode based on the 5G gateway is adopted, the redundancy mode realizes millisecond backup switching to ensure the operation stability of the system when the link is interrupted through double equipment and double link backup redundancy, and the remote transmission of the 5G network can realize the remote control of the control system on the equipment hung down.
Description
Technical Field
The invention relates to the field of automatic communication, in particular to a wireless network control connection method based on a redundancy control system.
Background
The redundancy generally refers to increasing the reliability of the system through multiple backups, the traditional redundancy refers to additionally adding an equal and similar component on the basis of the original component of the system as a backup, the backup can be static backup or dynamic backup, the redundant component can be at the level of the system, can be at the level of a functional component or at the level of a logic component, and the setting principle is determined according to the comprehensive evaluation of the fault tolerance requirement, the performance price and the like of the system.
Although the traditional redundancy mode solves the backup problem when the system is in operation failure, the traditional redundancy transmission mode adopts the redundancy of a wired connection mode, a large amount of optical fiber cost is required to be invested during construction, and the wired connection is inflexible, so that the equipment data can be transmitted in one direction only. The problem of low time delay existing in traditional network transmission is further solved, the wireless network is unstable, and therefore the equipment cannot be switched immediately when being switched, and system operation is affected. Based on the problems, the invention provides a wireless network control connection method based on a redundancy control system, which improves the operation stability of the system and helps to improve the production operation efficiency of enterprises.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the dual-link backup redundancy is provided, millisecond-level backup switching is realized when a link is interrupted, the running stability of the system is ensured, and remote control of the control system on the downlink equipment is realized through wireless network remote transmission.
The technical scheme adopted by the invention for solving the technical problems is as follows: a wireless network control connection method based on a redundancy control system comprises the following steps:
s1, the control layer PLC device is connected with the control layer gateway, and the command sent by the control layer PLC device is transmitted through the control layer gateway; the control layer PLC redundant equipment is connected with the control layer redundant gateway and transmits the instruction through the control layer redundant gateway;
s2, the control layer gateway and the control layer redundant gateway are connected with the multi-stage equipment layer gateway, and data or instructions are transmitted between the control layer gateway and the control layer redundant gateway and the multi-stage equipment layer gateway through a 5G link or a WiFi6 link;
s3, the multi-level device layer gateway transmits the received instruction to the corresponding connection terminal to execute the instruction sent by the PLC device of the control layer;
s4, when the equipment layer gateway is provided with a plurality of connecting terminals to be connected with the equipment, the equipment layer gateway connected with the equipment is connected with the control layer gateway through a 5G link or a WiFi6 link;
s5, in the steps S2 and S4, the device layer gateway is connected with the control layer gateway or the control layer redundant gateway through a 5G link, at the moment, a 5G link channel is opened, and data are transmitted through a 5G network channel;
s6, in the step S5, when the 5G link channel fails or is delayed, the link channel is automatically switched to a WiFi6 backup link for networking.
Further, in the step S1, the control layer PLC device and the control layer PLC redundancy device are redundantly backed up, and the control layer gateway and the control layer redundancy gateway are redundantly backed up.
Furthermore, in the operation process of the system, when the control layer PLC equipment fails to operate, the system is automatically switched to the control layer PLC redundant equipment, and the control layer gateway connected with the control layer PLC equipment is automatically switched to the control layer PLC redundant gateway connected with the control layer PLC redundant equipment.
Furthermore, the backup method between the control layer PLC device and the control layer PLC redundant device is as follows: a second-layer redundancy is carried out between the control layer PLC equipment and the control layer PLC redundancy equipment through a first gateway and a third gateway, and between the second gateway and the third gateway; the first gateway and the second gateway are mutually redundant
Compared with the prior art, the invention has the advantages that the invention is suitable for all automation and equipment redundancy systems, can be widely applied to various fields such as aviation, traffic, electric power, production and manufacturing, and has very wide application prospect, and adopts a system redundancy mode based on a 5G gateway, wherein the redundancy mode realizes millisecond backup switching during link interruption through double equipment and double link backup redundancy, ensures the operation stability of the system, and simultaneously realizes the remote control of the control system on the lower-hanging equipment through 5G network remote transmission. The switching to the backup equipment can be ensured when the equipment connection is interrupted, and the running stability of the system is ensured; the system can be ensured to be in a networking state at any time, and the current 5G network and the WiFi6 network can ensure the networking of the system to be stably operated; the system can realize PLC remote control I/O or other related equipment to achieve real remote control; the system can realize that the redundant backup PLC can remotely control I/O or other related equipment under the state of not influencing the system operation when the main PLC fails; when the system is controlled, the data sharing of the equipment is realized through coexistence and mutual communication of multiple EOIP networks.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the control scheme of the present invention;
fig. 2 is a schematic connection diagram of a control layer PLC device, a control layer gateway, and a device layer gateway according to the present invention;
FIG. 3 is a schematic diagram of connection between control layer PLC redundant devices and control layer redundant gateways and device layer gateways according to the present invention;
fig. 4 is a schematic diagram illustrating switching between a 5G link and a WIFI6 link according to the present invention;
fig. 5 is a schematic diagram of the simultaneous switching of control layer PLC devices and control layer gateways according to the present invention;
FIG. 6 is a schematic diagram of dual link and dual gateway backup connections according to the present invention;
FIG. 7 is a diagram illustrating the coexistence of multiple EOIP networks to achieve the mutual communication between the multiple EOIP networks.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The scheme mainly adopts a system redundancy mode as described below, based on double-link backup of a 5G network and a WiFi6 network, the backup switching of the 5G network and the WiFi6 network is realized, the redundancy backup of a control layer is realized through double equipment and double links, when the current control equipment fails or is interrupted, the control equipment is switched to backup control equipment in real time, the operation stability of the system is ensured, and the remote control between the control layer and the equipment layer is realized through the redundancy between the control layer and gateway equipment of a field equipment layer.
When the control layer PLC equipment remotely controls a remote connection terminal, namely I/O, through the 5G gateway:
(1) the control layer PLC device PLC1 is connected with the control layer gateway GW1, and the command sent by the control layer PLC device PLC1 is transmitted through the control layer gateway GW 1;
(2) the control layer gateway GW1 and the multi-level device layer gateways GW3 and GW 4-Gwn realize the transmission of data or instructions through a 5G link or a WiFi6 link;
(3) the device layer gateways GW 4-Gwn transmit the received instruction to the corresponding connection terminals I/O1-I/On, and the I/O1-I/On execute the instruction transmitted by the PLC, namely, control the device to work;
(4) when the equipment layer is provided with a plurality of I/O equipment, equipment layer gateways GW 4-Gwn connected with the equipment are connected with a control layer gateway GW1 through a 5G link or a WiFi6 link, and a control layer PLC (programmable logic controller) device PLC1 can control the equipment layer to execute a plurality of I/O equipment execution instructions;
(5) the control layer PLC devices PLC1 transmit the command to the device layer gateway GW3 through the control layer gateway GW1, and the devices with Modbus-RTU protocol connected with the device layer gateway execute the command sent by the control layer PLC devices PLC 1.
When the control layer PLC equipment fails and the control layer PLC redundant equipment needs to control remote I/O through the 5G network:
(1) the control layer PLC redundant equipment PLC2 is connected with a control layer redundant gateway GW2, and transmits the command through a control layer redundant gateway GW 2;
(2) the control layer gateway redundancy GW2 and the device layer gateways GW3/GW 4-Gwn realize the transmission of data or instructions through a 5G link or a WiFi6 link;
(3) the device layer gateways GW3/GW 4-Gwn transmit the received instructions to corresponding I/O1-I/O n, and the I/O I-I/O n execute the instructions transmitted by the control layer PLC redundant device PLC 2;
(4) when the equipment layer has a plurality of I/O equipment, equipment layer gateways GW 4-Gwn connected with the equipment are all connected with a control layer redundant gateway GW2 through a 5G link or a WiFi6 link, and a control layer PLC redundant equipment PLC2 can control the equipment layer to execute a plurality of I/O equipment execution instructions;
(5) the control layer PLC redundant device PLC2 transmits the command to the device layer gateway GW3 through the control layer PLC redundant gateway GW2, and the device with the Modbus-RTU protocol connected with the device layer gateway GW3 executes the command sent by the control layer PLC redundant device PLC 2.
When the backup switching of the 5G and WiFi6 double links needs to be realized:
the technology adopted by the invention is to build a 5G network and WiFi6 network interconversion channel in the gateway equipment by adopting the Linux bridge technology. The specific technical scheme is as follows:
(1) the gateway device sets a priority networking mode to be 5G or WiFi6, if the priority is set to be 5G networking currently, a device link 5G channel is opened, data are transmitted through a 5G network channel, and vice versa;
(2) if the current 5G networking channel has a fault or time delay, the gateway device automatically switches to a WiFi6 backup link for networking.
When the backup gateway is used in the redundant system to realize the simultaneous switching of the gateway and the PLC:
(1) the control layer PLC equipment and the control layer PLC redundant equipment are redundant backups for each other, and the control layer gateway GW1 and the control layer redundant gateway GW2 are redundant backups for each other;
(2) assuming that the current main control device is a control layer PLC device PLC1 and the redundant backup device is a control layer PLC redundant device PLC2, the control layer gateway GW1 is a main gateway and the control layer redundant gateway GW2 is a backup gateway;
(3) in the operation process of the system, when the main control equipment fails to operate, the system is automatically switched to the redundant equipment, the main gateway connected with the main control equipment is also automatically switched to the backup gateway, namely, the control layer gateway connected with the control layer PLC equipment is automatically switched to the control layer redundant gateway connected with the control layer PLC redundant equipment, so that the simultaneous switching is realized.
When dual-link and dual-gateway backup needs to be realized in a redundant system, a first gateway is a gateway A, a second gateway is a gateway B, a third gateway is a gateway C, and a fourth gateway is a gateway D, the method specifically comprises the following steps:
(1) two-layer air redundancy is carried out between the control layer PLC equipment and the control layer PLC redundancy equipment through a gateway A and a gateway C, and between a gateway B and the gateway C;
(2) the gateway A is connected with the gateway C, and the gateway A is connected with the gateway D to realize the control of the PLC1 on IO and RTU equipment;
(3) the gateway A and the gateway B are used as node guarantee gateways and are mutually redundant.
When multiple EOIP networks coexist in one system, the mutual communication steps of the multiple EOIP networks are as follows:
(1) in the system, EOIP channels are connected between a control layer gateway GW1 and device layer gateways GW3 and GW 4-Gwn;
(2) similarly, in the system, EOIP channel connection is also arranged between the control layer redundant gateway GW2 and the device layer gateways GW3 and GW 4-Gwn;
(3) the current control layer gateway GW1 device communicates with the device layer gateways GW3/GW 4-Gwn, the control layer gateway GW1 communicates with the control layer redundant gateway GW2 to form closed-loop communication, and the multi-EOIP network communication is realized
The above-mentioned embodiments are only preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (4)
1. A wireless network control connection method based on a redundancy control system is characterized by comprising the following steps:
s1, the control layer PLC device is connected with the control layer gateway, and the command sent by the control layer PLC device is transmitted through the control layer gateway; the control layer PLC redundant equipment is connected with the control layer redundant gateway and transmits the instruction through the control layer redundant gateway;
s2, the control layer gateway and the control layer redundant gateway are connected with the multi-stage equipment layer gateway, and data or instructions are transmitted between the control layer gateway and the control layer redundant gateway and the multi-stage equipment layer gateway through a 5G link or a WiFi6 link;
s3, the multi-level equipment layer gateway transmits the received instruction to a corresponding connecting terminal to execute the instruction sent by the control layer PLC equipment;
s4, when the equipment layer gateway is provided with a plurality of connecting terminals to be connected with the equipment, the equipment layer gateway connected with the equipment is connected with the control layer gateway through a 5G link or a WiFi6 link;
s5, in the steps S2 and S4, the device layer gateway is connected with the control layer gateway or the control layer redundant gateway through a 5G link, at the moment, a 5G link channel is opened, and data are transmitted through a 5G network channel;
s6, in the step S5, when the 5G link channel fails or is delayed, the link channel is automatically switched to a WiFi6 backup link for networking.
2. The rnc connection method according to claim 1, wherein in step S1, the control layer PLC device and the control layer PLC redundancy device are redundantly backed up, and the control layer gateway and the control layer redundancy gateway are redundantly backed up.
3. The method as claimed in claim 1, wherein during operation of the system, when the control layer PLC device fails and cannot operate, the system is automatically switched to the control layer PLC redundancy device, and the control layer gateway connected to the control layer PLC device is automatically switched to the control layer redundancy gateway connected to the control layer PLC redundancy device.
4. The method for controlling and connecting the wireless network based on the redundancy control system according to claim 1, wherein the backup method between the control layer PLC device and the control layer PLC redundancy device is as follows: a second-layer redundancy is carried out between the control layer PLC equipment and the control layer PLC redundancy equipment through a first gateway and a third gateway, and between the second gateway and the third gateway; the first gateway and the second gateway are redundant.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114563946A (en) * | 2022-04-28 | 2022-05-31 | 深圳斯凯达控制技术有限公司 | Control method and system for industrial monitoring redundant system with cooperation of gateway and PLC |
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Application publication date: 20210928 |