CN218679108U - Gateway device and industrial control system - Google Patents

Abstract

The application provides a gateway device and an industrial control system, relates to the field of electronic equipment, and solves the problem that the application range of the gateway device in the related technology is limited. The application provides a gateway device comprising: the network switching device comprises a processor, a network switching chip, a first interface for transceiving first protocol data and a plurality of second interfaces for transceiving second protocol data; the first interface is connected with the processor, the processor is connected with the network switching chip, and the network switching chip is respectively connected with each of the plurality of second interfaces.

Description

Gateway device and industrial control system

Technical Field

The utility model relates to an electronic equipment field especially relates to a gateway equipment and industrial control system.

Background

In the field of industrial control, different field bus protocols are used for different types of terminal devices, and in order to communicate the terminal devices with a controller, a gateway device is generally used for protocol conversion.

In the related art, modbus is a serial communication protocol, which was published in 1979 by Modicon corporation (now schneider electric) for communication using a PLC (Programmable Logic Controller). Modbus has become an industry standard for industrial field communication protocols, and now the Modbus TCP (Transmission Control Protocol) Protocol is a common Modbus network Protocol for terminal devices. And the Modbus TCP gateway is gateway equipment for performing protocol conversion between an industrial Ethernet network and the Modbus TCP network. The Modbus TCP gateway equipment is connected with the controller through an Ethernet network interface and is connected with the terminal equipment through the Modbus TCP network interface.

However, since the existing Modbus TCP gateway device generally includes a single ethernet network interface and a single Modbus TCP network interface, only protocol forwarding of a single network can be provided, and the application range is relatively limited. For example, in a scenario where multiple terminal devices communicate with a controller, the application range of the existing Modbus TCP gateway device is limited, and the Modbus TCP gateway device needs to cooperate with a network switch device to meet the use requirement.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the application range of the gateway device is limited in the related art, the application provides a gateway device capable of expanding the application range of the gateway device.

In a first aspect, an embodiment of the present application provides a gateway device, including:

the network switching device comprises a processor, a network switching chip, a first interface for transceiving first protocol data and a plurality of second interfaces for transceiving second protocol data;

the first interface is connected with the processor, the processor is connected with the network switching chip, and the network switching chip is respectively connected with each of the plurality of second interfaces.

Optionally, in the gateway device provided in this embodiment of the present application, the processor is a field programmable gate array FPGA chip, the first interface includes an ethernet interface, and the second interface includes a Modbus TCP interface.

Optionally, in the gateway device provided in this embodiment of the present application, the first interface includes a plurality of interfaces, and the processor is connected to each of the plurality of first interfaces.

Optionally, in the gateway device provided in the embodiment of the present application, the gateway device further includes an interface physical layer PHY chip, and the processor is connected to the first interface through the PHY chip.

Optionally, in the gateway device provided in this embodiment of the present application, the network switching chip includes a third interface, an allocation module, and a plurality of fourth interfaces, where the third interface is connected to the allocation module, and the allocation module is connected to the plurality of fourth interfaces; the network switching chip is connected with the processor through the third interface, and the fourth interfaces are connected with the second interfaces in a one-to-one correspondence manner.

Optionally, in the gateway device provided in this embodiment of the present application, the third interface is a media independent MII interface, and the fourth interface is a media dependent MDI interface.

Optionally, in the gateway device provided in the embodiment of the present application, the gateway device further includes a redundant communication module, and the redundant communication module is connected to the processor.

Optionally, in the gateway device provided in the embodiment of the present application, the gateway device further includes a storage module, and the storage module is connected to the processor.

Optionally, in the gateway device provided in this embodiment of the present application, the gateway device further includes a power module, and the power module is respectively connected to the processor and the network switching chip.

In a second aspect, an embodiment of the present application provides an industrial control system, including: a controller, a plurality of terminal devices and a gateway device as described in the first aspect;

the controller is connected with the first interface of the gateway device, and the plurality of second interfaces of the gateway device are connected with the plurality of terminal devices in a one-to-one correspondence manner.

The gateway device comprises a processor, a network switching chip, a first interface for transceiving first protocol data, and a plurality of second interfaces for transceiving second protocol data; the first interface is connected with the processor, the processor is connected with the network switching chip, and the network switching chip is respectively connected with each of the plurality of second interfaces. Therefore, the number of the second interfaces is expanded through the network exchange chip in the gateway equipment, compared with the prior art, the second interfaces are expanded to a plurality of interfaces through a single interface, the number of the terminal equipment connected with the gateway equipment is increased, the application requirements of the terminal equipment are met, and the application range of the gateway equipment is expanded.

Drawings

The accompanying drawings, which are described herein, are included to provide a further understanding of the invention and constitute a part of this specification, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic structural diagram of a gateway device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another gateway device provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of another gateway device provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an industrial control system according to an embodiment of the present disclosure;

description of reference numerals:

100-a gateway device; 110-a processor; 120-network switching chip; 130 — a first interface; 140-a second interface; 150-PHY chip; 160-redundant communication modules; 170-a storage module; 180-a power module; 200-a controller; 300-terminal equipment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below with reference to specific embodiments of the present application and accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of those features. In the description of the present application, "a plurality" means two or more unless otherwise specified. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/", and generally means that the former and latter related objects are in an "or" relationship.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the field of industrial control, a variety of terminal instruments and meters are available, and different field bus protocols are used by different types of terminal equipment. In order to communicate between the terminal device and the controller, the gateway device is usually used to perform protocol conversion, so as to expand the types and number of the connection terminals of the control system, implement large-scale automatic control, and implement more flexible and abundant system functions. The Modbus TCP gateway device is a gateway device for performing protocol conversion between an industrial Ethernet and a Modbus TCP network. In the current product, modbus TCP gateway equipment mostly is single Modbus TCP network interface and single industrial ethernet network interface, and the function singleness can only provide the agreement of single network and forward, and the use scene is single, to the use scene of more than one terminal equipment, needs to increase network switch equipment, and Modbus TCP gateway equipment cooperation network switch equipment uses, brings the input of cost.

Based on this, the gateway device provided in the embodiments of the present application is intended to extend the application range of the gateway device. For example, in the embodiment of the present application, the network switch chip is arranged in the gateway device, so as to expand the number of Modbus TCP interfaces, and compared with the related art, the number of terminal devices connected to the gateway device is increased by expanding a single interface to multiple interfaces, thereby satisfying the application requirements of multiple terminal devices, and expanding the application range of the gateway device. For example, a network switch chip is arranged in the gateway device, 4 Modbus TCP interfaces are extended, the 4 Modbus TCP interfaces are connected to the processor through the network switch chip, and when the gateway device is connected to 4 or less than 4 terminal devices, the use requirement can be met without adding a network switch device for use in cooperation.

The technical solution provided by the present invention is described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a gateway device according to an embodiment of the present application.

As shown in fig. 1, a gateway device 100 provided in this embodiment may include: a processor 110, a network switching chip 120, a first interface 130 for transceiving first protocol data, and a plurality of second interfaces 140 for transceiving second protocol data;

the first interface 130 is connected to the processor 110, the processor 110 is connected to the network switch chip 120, and the network switch chip 120 is connected to each of the second interfaces 140.

In the embodiment of the present application, the operating principle of the gateway device 100 may be: the first interface 130 receives the first protocol data and transmits the first protocol data to the processor 110; the processor 110 performs protocol conversion processing on the first protocol data, and the processed data is second protocol data; the processor 110 sends the second protocol data to the network switch chip 120; the network switch chip 120 distributes the second protocol data to the corresponding second interface 140 according to the preset correspondence between the IP address and the data.

Alternatively, in the embodiment of the present application, the operation principle of the gateway apparatus 100 may be: the second interface 140 receives the second protocol data and transmits the second protocol data to the network switch chip 120, and the network switch chip 120 transmits the second protocol data to the processor 110; the processor 110 performs protocol conversion processing on the second protocol data, and the processed data is the first protocol data; the processor 110 sends the first protocol data to the first interface 130.

Wherein, the first interface 130 may be used to receive or transmit first protocol data; the second interface 140 may be used to receive or transmit second protocol data; the processor 110 may be used for protocol conversion of the first protocol data and the second protocol data; the network switch chip 120 may be used to distribute the second protocol data to the respective second interfaces 140. For example, the network switch chip 120 stores an address list, the address list records the IP address corresponding to each second interface, and the network switch chip sends the corresponding second protocol data to the corresponding second interface according to the list address. In addition, the network switch chip 120 may be further configured to forward the second protocol data sent by the second interface to the processor.

Wherein the data protocol of the first protocol data and the second protocol data is different. For example, the first protocol data may be ethernet data and the second protocol data may be Modbus TCP data. Of course, the first protocol data and the second protocol data may also be other protocol data, and the application is not limited in particular here.

In this embodiment of the application, a processor and a network switching chip are disposed in the gateway device, the processor is configured to perform protocol conversion, and the network switching chip is configured to distribute second protocol data obtained after processing by the processor to each second interface, or transmit the second protocol data sent by each second interface to the processor. Because the network switching chip is arranged in the gateway equipment, the number of the second interfaces is expanded, compared with the prior art, the second interfaces are expanded to a plurality of interfaces from a single interface, the number of the terminal equipment connected with the gateway equipment is increased, the application requirements of the plurality of terminal equipment are met, and the application range of the gateway equipment is expanded.

The gateway device provided by the embodiment of the application comprises a processor, a network switching chip, a first interface for transceiving first protocol data and a plurality of second interfaces for transceiving second protocol data; the first interface is connected with the processor, the processor is connected with the network switching chip, and the network switching chip is respectively connected with each of the plurality of second interfaces. Therefore, the number of the second interfaces is expanded through the network exchange chip in the gateway equipment, compared with the prior art, the second interfaces are expanded to a plurality of interfaces through a single interface, the number of the terminal equipment connected with the gateway equipment is increased, the application requirements of the terminal equipment are met, and the application range of the gateway equipment is expanded.

In one particular embodiment, as shown in fig. 3, the processor 110 may be an FPGA chip, the first interface 130 may include an ethernet interface, and the second interface 140 may include a Modbus TCP interface. Further, the first protocol data may be ethernet protocol data and the second protocol data may be Modbus TCP protocol data.

In practical application, the Modbus TCP interface can be a standard RJ45 connector, each Modbus TCP network channel is a 10/100Mbps adaptive network, a standard hundred-mega Ethernet line is used for accessing the Modbus TCP network, and the maximum transmission distance of a single network line does not exceed 100 meters.

Therefore, the gateway device can be understood as a gateway device for performing protocol conversion between the industrial ethernet and the Modbus TCP network, the gateway device may have a plurality of Modbus TCP interfaces, and because the network switch chip is disposed in the gateway device, the number of the Modbus TCP interfaces is extended, compared with the related art, the Modbus TCP interfaces are extended from a single interface to a plurality of interfaces (for example, 2, 3, 4, 5, etc.), so as to increase the number of Modbus TCP terminal devices connected to the gateway device, meet the application requirements of a plurality of terminal devices, and extend the application range of the gateway device. In addition, equipment cost is saved, and difficulty of engineering arrangement is reduced.

In a specific embodiment, in the gateway apparatus 100, the first interface 130 includes a plurality of interfaces, and the processor 110 is respectively connected to each of the first interfaces 130 in the plurality of interfaces. For example, as shown in fig. 2, there are 2 first interfaces 130, and the processor 110 is connected to the 2 first interfaces 130 respectively. Therefore, when the network access where one first interface is located fails, the other first interface can work normally without interruption, and the reliability of the gateway equipment is improved.

For example, in practical applications, in a case that the first interface is an ethernet interface, the gateway device 100 has two ethernet channels, which can be used to connect two ethernet channels of the DCS controller, each ethernet channel has a data communication function at the same time, and when one ethernet channel fails, the other ethernet channel can provide communication for the DCS system without interruption, so that the reliability of system communication is greatly improved.

In a specific embodiment, as shown in fig. 2, the gateway device 100 further includes a PHY (Port Physical Layer) chip 150, and the processor 110 is connected to the first interface 130 through the PHY chip 150. The PHY chip 150 may be a media independent interface (i.e., MII interface) or a simplified media independent interface (i.e., RMII interface), the PHY chip 150 may further have a media dependent interface (i.e., MDI interface), the media independent interface or the simplified independent media interface of the PHY chip 150 may be connected to the processor 110, and the media dependent interface of the PHY chip 150 may be connected to the first interface 130. PHY chip 150 may connect the first interface to the mac interface of the FPGA chip for sending and receiving data frames of the ethernet network.

In another specific embodiment, the network switch chip 120 includes a third interface, an allocation module, and a plurality of fourth interfaces, where the third interface is connected to the allocation module, and the allocation module is connected to the plurality of fourth interfaces; the network switching chip is connected with the processor through a third interface, and the plurality of fourth interfaces are connected with the plurality of second interfaces in a one-to-one correspondence mode. The allocating module may be configured to allocate the second protocol data obtained after the processing by the processor to the corresponding second interface according to the IP address.

In practical applications, the third interface may be a media dependent interface (i.e., MDI interface) or a media independent interface (i.e., MII interface), and the fourth interface may be a media dependent interface (i.e., MDI interface). The following examples are given.

For example, in a case where the third interface is an MDI interface and the fourth interface is an MDI interface (not shown), the processor is connected to the network switch chip through the PHY chip, and the processor and the network switch chip perform protocol conversion through the PHY chip, at this time, the processor is connected to the third interface (i.e., the MDI interface) of the network switch chip through the PHY chip, and the network switch chip is connected to the second interface through the fourth interface (i.e., the MDI interface).

For another example, when the third interface is an MII interface and the fourth interface is an MDI interface, as shown in fig. 2, the processor 110 is directly connected to the network switch chip, in this case, the processor 110 is directly connected to the third interface (i.e., the MII interface) of the network switch chip, and the network switch chip is connected to the second interface through the fourth interface (i.e., the MDI interface). Under the condition, the network exchange chip with the MII interface is used, and the MII interface of the network exchange chip is directly connected with the FPGA chip, so that the connection mode from the processor to the network exchange chip is simplified, the hardware architecture of the network equipment is simplified, the process of intermediate protocol conversion is reduced, and the data processing is simple and efficient.

In order to improve the reliability of the gateway device, in a specific embodiment, the gateway device 100 further includes a redundant communication module 160, and the redundant communication module 160 is connected to the processor 110. The redundant communication module of the gateway equipment can be used for communicating with other gateway equipment, so that the fault level of the gateway equipment can be determined under the condition that the gateway equipment is in fault, and the redundant communication module is switched to work by another gateway equipment, so that the reliability of the gateway equipment is improved.

In a specific embodiment, as shown in fig. 2, the gateway device 100 further includes a storage module 170, and the storage module 170 is connected to the processor 110. The storage module 170 may be specifically an SDRAM (synchronous dynamic random access memory), and the storage module 170 may be configured to store the first protocol data and the second protocol data.

The gateway device further includes a power module 180, and the power module 180 is connected to the processor 110 and the network switch chip 120, respectively. The power module can provide required power for each chip of the gateway device, and can be in specifications of 3.3V, 1.8V, 1.5V, 1.2V and the like according to the requirements of different chips.

The gateway device provided in the above embodiments may be used in an industrial control system. The embodiment of the application also provides an industrial control system. This will be explained in detail below.

Fig. 4 is a schematic structural diagram of an industrial control system according to an embodiment of the present disclosure.

As shown in fig. 4, an industrial control system provided in an embodiment of the present application may include: a controller 200, a plurality of terminal apparatuses 300, and the gateway apparatus 100 described in the above embodiments;

the controller is connected with the first interface of the gateway device, and the plurality of second interfaces of the gateway device are connected with the plurality of terminal devices in a one-to-one correspondence manner.

In the embodiment of the present application, the controller 201 includes, but is not limited to, a central controller, and the present application is not limited thereto. The controller can directly control the terminal device through the gateway device. In addition, the controller can also be connected with an upper computer, the controller is controlled through the upper computer, and the controller controls the terminal equipment through the gateway equipment.

In this embodiment of the application, the gateway device 100 may refer to the embodiments of the gateway device and the specific contents of fig. 1 to fig. 3, which are not described herein again.

In the embodiment of the present application, the industrial control system includes, but is not limited to, a fieldbus control system or a DCS control system, and the present application is not limited thereto. For example, in a DCS control system, a controller is the core of the control system, and gathers data of various terminal devices, and the controller mainly functions to analyze and record the data and issue control commands. The number of the DCS system connected with the terminal equipment can reach hundreds of thousands, data communication is carried out between the controller and the terminal equipment through the gateway module, the terminal equipment is various in types, communication protocols are different, and the DCS system is connected with the gateway equipment which needs protocol conversion. The application provides a Modbus TCP gateway equipment, the function is to Modbus TCP agreement to ethernet protocol conversion, current gateway product is generally that the single port is connected to the single port, an ethernet net gape and a Modbus TCP net gape promptly, the field usage need cooperate the switch to do a job altogether more and use, the Modbus TCP gateway equipment that this application provided has a plurality of Modbus TCP interfaces, can conveniently connect a plurality of Modbus TCP equipment, need not increase extra switch equipment, reduce equipment cost's input.

The industrial control system that this application embodiment provided includes: a controller, a plurality of terminal devices, and the gateway device 100 described in the above embodiment; the controller is connected with the first interface of the gateway device, and the plurality of second interfaces of the gateway device are connected with the plurality of terminal devices in a one-to-one correspondence manner. Like this, through network switch chip in the gateway equipment has expanded the quantity of second interface, compare with the correlation technique that the second interface is extended a plurality of interfaces by single interface, improved the terminal equipment quantity that the gateway equipment is connected, satisfied a plurality of terminal equipment's application demand, the gateway equipment need not to cooperate network switch equipment to use, has saved network switch equipment cost, has reduced the degree of difficulty that the engineering was arranged.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A gateway device, comprising:

the network switching device comprises a processor, a network switching chip, a first interface for transceiving first protocol data and a plurality of second interfaces for transceiving second protocol data;

the first interface is connected with the processor, the processor is connected with the network switching chip, and the network switching chip is respectively connected with each of the plurality of second interfaces.

2. The gateway device of claim 1, wherein the processor is a Field Programmable Gate Array (FPGA) chip, wherein the first interface comprises an Ethernet interface, and wherein the second interface comprises a Modbus TCP interface.

3. The gateway device of claim 1, wherein the first interface comprises a plurality of interfaces, and wherein the processor is connected to each of the plurality of first interfaces.

4. The gateway device according to claim 1 or 3, wherein the gateway device further comprises an interface physical layer (PHY) chip, and wherein the processor is connected to the first interface via the PHY chip.

5. The gateway device of claim 1, wherein the network switch chip comprises a third interface, an assignment module, and a plurality of fourth interfaces, wherein the third interface is connected to the assignment module, and wherein the assignment module is connected to the plurality of fourth interfaces; the network switching chip is connected with the processor through the third interface, and the fourth interfaces are connected with the second interfaces in a one-to-one correspondence manner.

6. The gateway device of claim 5, wherein the third interface is a media independent MII interface and the fourth interface is a media dependent MDI interface.

7. The gateway device of claim 1, further comprising a redundant communication module coupled to the processor.

8. The gateway device of claim 1, further comprising a memory module coupled to the processor.

9. The gateway device of claim 1, further comprising a power module, the power module being respectively connected to the processor and the network switch chip.

10. An industrial control system, comprising: a controller, a plurality of terminal devices and a gateway device according to any one of claims 1-9;

the controller is connected with the first interface of the gateway device, and the plurality of second interfaces of the gateway device are connected with the plurality of terminal devices in a one-to-one correspondence manner.

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