CN216623036U - Large-scale PLC control system - Google Patents
Large-scale PLC control system Download PDFInfo
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- CN216623036U CN216623036U CN202220338453.5U CN202220338453U CN216623036U CN 216623036 U CN216623036 U CN 216623036U CN 202220338453 U CN202220338453 U CN 202220338453U CN 216623036 U CN216623036 U CN 216623036U
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Abstract
The utility model discloses a large PLC control system, comprising: the system comprises a CPU control module and at least one remote control terminal; the CPU control module comprises a first high-speed backboard, a CPU control module and a first real-time communication module, the first real-time communication module and the CPU control module are connected to the first high-speed backboard, and the CPU control module is used for carrying out data interactive communication with the remote control end through the first real-time communication module; the remote control end comprises a second high-speed backboard, a second real-time communication module and a data processing module, the second real-time communication module and the data processing module are connected to the second high-speed backboard, the second real-time communication module is in Ethernet communication connection with the first real-time communication module, the remote control end is used for receiving a control signal sent by the CPU control module through the second real-time communication module, data processing is carried out based on the control signal through the data processing module, and a data processing result is transmitted to the CPU control module through the second real-time communication module.
Description
Technical Field
The utility model relates to the technical field of PLC control, in particular to a large-scale PLC control system.
Background
The application of Programmable Logic Controller (PLC) in industrial field is becoming complex, and in the face of the increasingly complex field requirements, different device protocols are numerous and not universal. At present, common PLC control systems in the industrial control market mostly adopt field buses such as common Ethernet, 485 and the like to form a network topology structure; the problems of low transmission speed, poor real-time performance, low reliability and the like exist. And foreign PLC control systems mostly adopt a private bus technology, the cost for constructing the PLC control system is high, and the protocol compatibility problem exists. The device scheme proposed by the patent will solve the above problems.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a large PLC control system, which mainly solves the technical problems of slow transmission speed, poor real-time performance, low reliability and high cost of the existing PLC control system.
In order to solve the above technical problem, the present invention provides a large PLC control system, including: the CPU control module comprises a CPU control module and at least one remote control terminal;
the CPU control module comprises a first high-speed backboard, a CPU control module and a first real-time communication module, the first real-time communication module is interconnected with the CPU control module through a backboard bus of the first high-speed backboard, and the CPU control module is used for carrying out data interactive communication with the at least one remote control terminal through the first real-time communication module;
the remote control end comprises a second high-speed backboard, a second real-time communication module and a data processing module, the second real-time communication module is connected with the data processing module through a backboard bus of the second high-speed backboard in an interconnecting mode, the second real-time communication module is connected with the first real-time communication module in an Ethernet communication mode, the remote control end is used for receiving a control signal sent by the CPU control module through the second real-time communication module and utilizing the data processing module to perform data response processing based on the control signal, and a data response processing result is transmitted to the CPU control module through the second real-time communication module.
Optionally, the data processing module includes at least one of a data monitoring module and a protocol conversion gateway, the data monitoring module and/or the protocol conversion gateway is connected to a backplane bus of the second high-speed backplane, the data monitoring module is configured to collect control field data, and the protocol conversion gateway is configured to perform intermediate packet conversion for a specific protocol device.
Optionally, the remote control end further includes a remote IO control module, and the remote IO control module is connected to the backplane bus of the second high-speed backplane and configured to perform signal transmission with the CPU control module.
Optionally, the backplane bus of the first high speed backplane and the backplane bus of the second high speed backplane are high speed lvds buses.
Optionally, an annular dual-redundancy network topology is constructed between the first real-time communication module and at least one second real-time communication module corresponding to the at least one remote control end, and is used for annularly connecting the CPU control module and the at least one local control end, so as to implement remote data transmission.
Optionally, the CPU control module includes a main control CPU and at least one standby CPU, where the main control CPU is configured to perform data interaction control, and the standby CPU is configured to perform data interaction control by replacing the main control CPU in case of a failure.
Optionally, if the large PLC control system includes a plurality of remote control terminals, a real-time ethernet communication connection is established between second real-time communication modules of the plurality of remote control terminals.
Optionally, the CPU control module and the plurality of remote control terminals are centrally disposed in the same control cabinet; or the CPU control module and the plurality of remote control ends are respectively arranged in different control cabinets.
According to the technical scheme, the large PLC control system comprises a CPU control module and at least one remote control end, wherein the CPU control module comprises a first high-speed backboard, a CPU control module and a first real-time communication module, the first real-time communication module is interconnected with the CPU control module through a backboard bus of the first high-speed backboard, and the CPU control module is used for carrying out data interactive communication with the at least one remote control end through the first real-time communication module; the remote control end comprises a second high-speed backboard, a second real-time communication module and a data processing module, the second real-time communication module and the data processing module are interconnected through a backboard bus of the second high-speed backboard, the second real-time communication module is in real-time Ethernet communication connection with the first real-time communication module, the remote control end is used for receiving a control signal sent by the CPU control module through the second real-time communication module, data response processing is carried out by the data processing module based on the control signal, and a data response processing result is transmitted to the CPU control module through the second real-time communication module. In the utility model, the distributed PLC control system is constructed through the real-time Ethernet, so that the PLC control system can deal with various different working conditions, can build a multipoint and remote PLC control system, can form an optimal PLC solution, and can meet the real-time data interaction requirement of PLC control while improving the transmission speed. In addition, the reliability of the system work can be improved through various modes such as CPU redundancy, bus redundancy and the like, and the cost of the PLC control system is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application to the disclosed embodiment. In the drawings:
fig. 1 is a system architecture diagram of a large PLC control system according to an embodiment of the present invention;
in the figure:
1-a CPU control module, 11-a first high-speed backboard, 12-a CPU control module, and 13-a first real-time communication module;
2-remote control end, 21-second high-speed backboard, 22-second real-time communication module, 23-data processing module, 24-remote IO control module, 231-data monitoring module and 232-protocol conversion gateway.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The utility model will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, a large PLC control system includes: a CPU control module 1 and at least one remote control terminal 2; the CPU control module 1 comprises a first high-speed backboard 11, a CPU control module 12 and a first real-time communication module 13, wherein the first real-time communication module 13 is interconnected with the CPU control module 12 through a backboard bus of the first high-speed backboard 11, and the CPU control module 12 is used for carrying out data interactive communication with at least one remote control terminal 2 through the first real-time communication module 13; the remote control end 2 comprises a second high-speed backboard 21, a second real-time communication module 22 and a data processing module 23, the second real-time communication module 22 and the data processing module 23 are interconnected through a backboard bus of the second high-speed backboard 21, the second real-time communication module 22 is in real-time Ethernet communication connection with the first real-time communication module 13, the remote control end 2 is used for receiving a control signal sent by the CPU control module 1 through the second real-time communication module 22, and utilizes the data processing module 23 to perform data response processing based on the control signal, and the data response processing result is transmitted to the CPU control module 1 through the second real-time communication module 22. The distributed PLC control is constructed through the real-time Ethernet, the first real-time communication module 13 and the second real-time communication module 22 can be used as bus carriers for mutual connection of all nodes in the CPU control module 1 and at least one remote control end 2, and data interaction of the CPU control module 1 and at least one remote control end 2 in the PLC control system is achieved.
In a specific application scenario, as an optional manner, the data processing module 23 may include at least one of a data monitoring module 231 and a protocol conversion gateway 232, the data monitoring module 231 and/or the protocol conversion gateway 232 are connected to a backplane bus of the second high-speed backplane 21, the data monitoring module 231 is configured to collect control field data, the protocol conversion gateway 232 is used as a communication node for converting with other field bus protocol devices, the device-oriented side may be rapidly developed according to actual requirements, and may be configured to perform middle packet conversion for a specific protocol device, and further complete control of the device.
In a specific application scenario, as an optional manner, the remote control end 2 further includes a remote IO control module 24, and the remote IO control module 24 is connected to a backplane bus of the second high-speed backplane 21 and configured to perform signal transmission with the CPU control module 1.
In a specific application scenario, as an optional manner, the high-speed backplane is used as a carrier for short-distance communication transmission of devices in the architecture, a dual-redundancy lvds bus, i.e., a high-speed lvds bus, is used as a backplane bus of the first high-speed backplane 11 and a backplane bus of the second high-speed backplane 21, and data interaction between devices connected to the high-speed backplane and real-time communication modules on the same backplane bus can be completed through the high-speed lvds bus. Correspondingly, in the CPU control module 1, the CPU control module 12 connected to the backplane bus of the first high-speed backplane 11 and the first real-time communication module 13 can communicate with each other through the high-speed lvds bus on the first high-speed backplane 11; in the remote control end 2, the second real-time communication module 22, the data monitoring module 231, the protocol conversion gateway 232, and the remote IO control module 24 connected to the backplane bus of the second high-speed backplane 21 can communicate with each other through the high-speed lvds bus of the second high-speed backplane 21. It should be noted that the modules plugged into the first high-speed backplane 11 or the second high-speed backplane 21 may be adaptively adjusted according to an actual reference scenario, for example, a data monitoring module, a protocol conversion gateway, an IO control module, etc. may also be plugged into the first high-speed backplane 11, and specifically, the modules may be adaptively adjusted according to an actual application scenario, and the connection manner in this application is described as an example, but does not constitute a specific limitation to the technical solution in this application.
In a specific application scenario, as an optional manner, a ring-shaped dual-redundancy network topology is constructed between the first real-time communication module 13 and at least one second real-time communication module 22 corresponding to at least one remote control terminal 2, and is used for connecting the CPU control module 1 and at least one local control terminal 2 in a ring shape.
In a specific application scenario, as an optional manner, the CPU control module 12 includes a main control CPU and at least one standby CPU, where the main control CPU is configured to perform data interaction control, and the standby CPU is configured to perform data interaction control by replacement when the main control CPU fails. The main control CPU and the at least one standby CPU are arranged in the CPU control module 12, so that the CPU in the CPU control module 12 is redundant, the standby CPU can be timely replaced when the main control CPU has faults and can not normally work, data interaction control is continued, and the working reliability of the system can be ensured. Correspondingly, the similar redundant backup mode can be adopted for the bus in the PLC control system to ensure the orderly proceeding of PLC control and reduce the maintenance cost of the PLC control system.
In a specific application scenario, as an optional manner, if the large-scale PLC control system includes a plurality of remote control terminals 2, the second real-time communication modules 22 of the plurality of remote control terminals 2 establish a real-time ethernet communication connection therebetween. For example, as shown in fig. 1, when the remote control 2 is included (A, B, C), in a ring-shaped dual redundant network topology constructed between a first real-time communication module and at least one second real-time communication module corresponding to at least one remote control, a real-time ethernet communication connection may be established between the first real-time communication module 13 and the second real-time communication module 22 in the remote control terminal 2(a), meanwhile, a real-time ethernet communication connection is established between the second real-time communication module 22 in the remote control end 2(a) and the second real-time communication module 22 in the remote control end 2(B), a real-time ethernet communication connection is established between the second real-time communication module 22 in the remote control terminal 2(B) and the second real-time communication module 22 in the remote control terminal 2(C), and establishing a real-time ethernet communication connection between the second real-time communication module 22 in the remote control terminal 2(C) and the first real-time communication module 13. Namely, the CPU control module 1, the remote control end 2(a), the remote control end 2(B), and the remote control end 2(C) are connected by a ring network formed by a real-time ethernet. Through the looped netowrk connection, when there is communication interruption of remote control end 2 and CPU control module 1, can not influence other remote control end 2 and CPU control module 1's communication, and then can improve the reliability of PLC control.
In a specific application scenario, as an optional mode, when the equipment to be controlled is close to the CPU control module, the CPU control module 1 and the plurality of remote control terminals 2 may be centrally disposed in the same control cabinet in order to save communication resources; when the distance between the equipment to be controlled and the CPU control module is far away, the CPU control module 1 and the remote control ends 2 can be respectively arranged in different control cabinets to realize remote control. As another optional mode, the settings of the CPU control module 1 and the plurality of remote control terminals 2 may be determined according to the system size of the PLC control system, and when the PLC control system is small, the CPU control module 1 and the plurality of remote control terminals 2 may be centrally set in the same control cabinet, or only one CPU control module 1 is used to control the device to be controlled; when the PLC control system is large, the CPU control module 1 and the remote control ends 2 can be respectively arranged in different control cabinets to realize remote control. Through diversified setting, the large-scale PLC control system can deal with various different working conditions, and can be set up in a multipoint and remote manner.
The large PLC control system provided by the utility model has the following beneficial effects: the distributed PLC control system is constructed through the real-time Ethernet, the PLC system can deal with various different working conditions, the multipoint and remote PLC control system can be built, an optimal PLC solution can be formed, the transmission speed is increased, and meanwhile, the real-time data interaction requirement of PLC control can be met. In addition, the reliability of the system work can be improved through various modes such as CPU redundancy, bus redundancy and the like, and the cost of the PLC system is reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A large PLC control system, comprising: the system comprises a CPU control module and at least one remote control terminal;
the CPU control module comprises a first high-speed backboard, a CPU control module and a first real-time communication module, the first real-time communication module is interconnected with the CPU control module through a backboard bus of the first high-speed backboard, and the CPU control module is used for carrying out data interactive communication with the at least one remote control terminal through the first real-time communication module;
the remote control end comprises a second high-speed backboard, a second real-time communication module and a data processing module, the second real-time communication module is connected with the data processing module through a backboard bus of the second high-speed backboard in an interconnecting mode, the second real-time communication module is connected with the first real-time communication module in an Ethernet communication mode, the remote control end is used for receiving a control signal sent by the CPU control module through the second real-time communication module and utilizing the data processing module to perform data response processing based on the control signal, and a data response processing result is transmitted to the CPU control module through the second real-time communication module.
2. The large PLC control system according to claim 1, wherein the data processing module comprises at least one of a data monitoring module and a protocol conversion gateway, the data monitoring module and/or the protocol conversion gateway is connected to a backplane bus of the second high-speed backplane, the data monitoring module is configured to collect control field data, and the protocol conversion gateway is configured to perform intermediate message conversion for a specific protocol device.
3. The large PLC control system according to claim 1, wherein the remote control end further comprises a remote IO control module, and the remote IO control module is connected to a backplane bus of the second high-speed backplane and configured to perform signal transmission with the CPU control module.
4. The large PLC control system of claim 1, wherein the backplane bus of the first high speed backplane and the backplane bus of the second high speed backplane are high speed lvds buses.
5. The large PLC control system according to claim 1, wherein a ring-shaped dual redundant network topology is configured between the first real-time communication module and at least one second real-time communication module corresponding to the at least one remote control end, and is used for annularly connecting the CPU control module and at least one local control end to realize remote data transmission.
6. The large PLC control system according to claim 1, wherein the CPU control module comprises a main control CPU and at least one standby CPU, the main control CPU is used for performing data interaction control, and the standby CPU is used for performing data interaction control in a replacement manner when the main control CPU fails.
7. The large PLC control system according to claim 1, wherein if the large PLC control system includes a plurality of remote control terminals, the second real-time communication modules of the plurality of remote control terminals are connected to each other via a real-time ethernet communication.
8. The large PLC control system according to claim 7, wherein the CPU control module and the plurality of remote control terminals are centrally disposed in a same control cabinet; or the like, or, alternatively,
the CPU control module and the plurality of remote control ends are respectively arranged in different control cabinets.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220338453.5U CN216623036U (en) | 2022-02-18 | 2022-02-18 | Large-scale PLC control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220338453.5U CN216623036U (en) | 2022-02-18 | 2022-02-18 | Large-scale PLC control system |
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| CN216623036U true CN216623036U (en) | 2022-05-27 |
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| CN202220338453.5U Active CN216623036U (en) | 2022-02-18 | 2022-02-18 | Large-scale PLC control system |
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