Communication system for field bus intelligent equipment

Abstract

The utility model discloses a communication system for field bus intelligent equipment, and the system is characterized in that the system comprises a controller which is provided with an Ethernet port; at least one field module, wherein each field module comprises an IO device field unit and N field bus intelligent devices; wherein the IO device field unit is used for connecting field bus intelligent devices to a PROFINET network, the IO device field unit is provided with at least two Ethernet ports and M field bus interfaces, each field bus intelligent device is connected with one field bus interface of the IO device field unit, and N is smaller than or equal to M; and one Ethernet port of the first IO equipment field unit is connected with one Ethernet port of the controller through an Ethernet cable, and the IO equipment field units are connected in series through the Ethernet cable. The communication system is simple to operate and convenient to install, and can access a plurality of field bus intelligent devices to the PROFINET network at one time, so that the cost is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of fieldbus, and in particular to a communication system for fieldbus intelligent devices. Background Art

[0002] PROFINET communication is an Ethernet communication system based on industrial Ethernet. It can directly connect field devices and has good real-time performance. The application of PROFINET bus is increasing, but the communication with field bus devices on PROFINET bus is not smooth. In addition, the environment of the project site is complex and the number of field devices is large, which brings inconvenience to project execution and maintenance. Utility Model Content

[0003] The utility model provides a communication system for field bus intelligent equipment.

[0004] The communication system for fieldbus intelligent devices provided by the present application includes:

[0005] A controller, which is equipped with an Ethernet port;

[0006] At least one field module, each field module includes an IO device field unit and N fieldbus intelligent devices; wherein the IO device field unit is used to connect the fieldbus intelligent device to the PROFINET network, the IO device field unit has at least two Ethernet ports and M fieldbus interfaces, each fieldbus intelligent device is connected to a fieldbus interface of the IO device field unit, N≤M; and

[0007] An Ethernet port of the first IO device field unit is connected to an Ethernet port of the controller via an Ethernet cable, and the IO device field units are connected in series via the Ethernet cable.

[0008] Optionally, the IO device field unit is configured to automatically allocate a communication address to a fieldbus intelligent device connected to the IO device field unit.

[0009] Optionally, an Ethernet port of the last IO device field unit connected in series is connected to an Ethernet port of the controller via an Ethernet cable.

[0010] Optionally, the fieldbus intelligent device is a fieldbus PA device, and the IO device field unit is configured to automatically allocate a PA address to the fieldbus intelligent device connected to the IO device field unit.

[0011] Optionally, the length of the Ethernet cable connected to the two IO device field units is less than 100m.

[0012] Optionally, when the length of the Ethernet cable connected between the IO device field unit and the controller is greater than or equal to 100 meters, an optoelectronic converter is arranged between the IO device field unit and the controller, the Ethernet port of the optoelectronic converter is connected to the controller through the Ethernet cable, and the optical fiber interface of the optoelectronic converter is connected to the IO device field unit through an optical cable; and the length of the Ethernet cable connected between the optoelectronic converter and the controller is less than 100m.

[0013] Optionally, when the length of the Ethernet cable connected between the IO device field unit and the controller is greater than or equal to 100 meters, F signal amplifiers are arranged between the IO device field unit and the controller, wherein the length of the Ethernet cable between two adjacent signal amplifiers, between the signal amplifier adjacent to the controller and the controller, and between the signal amplifier adjacent to the IO device field unit and the IO device field unit is less than 100 meters, and F≥1.

[0014] Optionally, the signal amplifier is a switch.

[0015] The positive and progressive effects of the utility model are:

[0016] The communication system for fieldbus intelligent devices provided by the present application is simple to operate and easy to install, and can connect multiple fieldbus intelligent devices to the PROFINET network at one time, thereby reducing costs and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are only intended to illustrate and explain the present application, and do not limit the scope of the present application.

[0018] Figure 1 A schematic diagram showing a communication system for field bus intelligent devices according to an implementation of an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram showing a communication system for field bus intelligent devices according to another implementation of an embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram showing a communication system for field bus intelligent devices according to another implementation of an embodiment of the present application is shown;

[0021] Description of reference numerals:

[0022] Controller 10;

[0023] Field module 20;

[0024] IO device field unit 21;

[0025] Fieldbus intelligent device 22; DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the embodiments of the present application, the specific implementation methods of the embodiments of the present application are now described with reference to the accompanying drawings.

[0027] PROFINET communication is an Ethernet communication system based on industrial Ethernet. It can directly connect field devices and has good real-time performance. The application of PROFINET bus is increasing, but the communication with field bus devices on PROFINET bus is not smooth. In addition, the environment of the project site is complex and the number of field devices is large, which brings inconvenience to project execution and maintenance.

[0028] Based on the above problems, an embodiment of the present application provides a communication system for fieldbus intelligent devices to at least partially solve the above technical problems.

[0029] The specific implementation of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] Embodiment 1 provides a communication system for field bus intelligent devices. Figure 1 As shown, the communication system of this embodiment includes a controller 10 and a field module 20. The field module 20 includes an IO device field unit 21 for connecting a fieldbus intelligent device 22 to a PROFINET network and N fieldbus intelligent devices 22. The IO device field unit 21 has at least two Ethernet ports and M fieldbus interfaces, each fieldbus intelligent device 22 is connected to a fieldbus interface of the IO device field unit 21, N≤M, and an Ethernet port of the IO device field unit 21 is connected to an Ethernet port of the controller 10 via an Ethernet cable, as shown in FIG. Figure 1 shown.

[0032] Example 2

[0033] The communication system for fieldbus intelligent devices of embodiment 2 includes a controller 10 and a plurality of field modules 20. Each field module 20 includes an IO device field unit 21 for connecting the fieldbus intelligent device 22 to the PROFINET network and N fieldbus intelligent devices 22. Each IO device field unit 21 has at least two Ethernet ports and M fieldbus interfaces, and each fieldbus intelligent device 22 is respectively connected to a fieldbus interface of the IO device field unit 21 of the field module 20 to which it belongs, and N≤M.

[0034] like Figure 2As shown, the IO device field unit 21 of the embodiment of the present application is connected in series with the controller 10. That is, one Ethernet port of the first IO device field unit 21 is connected to one Ethernet port of the controller 10 through an Ethernet cable; one Ethernet port of the i-th IO device field unit 21 is connected to one Ethernet port of the i-1-th IO device field unit 21 through an Ethernet cable, another Ethernet port of the i-th IO device field unit 21 is connected to one Ethernet port of the i+1-th IO device field unit 21 through an Ethernet cable, and one Ethernet port of the last IO device field unit 21 is connected to the Ethernet port of the previous IO device field unit 21 through an Ethernet cable.

[0035] By connecting a plurality of IO device field units 21 to the controller 10 in series, a plurality of fieldbus intelligent devices 22 are connected to the PROFINET network.

[0036] Example 3

[0037] The communication system for fieldbus intelligent devices of embodiment 3 includes a controller 10 and a plurality of field modules 20. Each field module 20 includes an IO device field unit 21 for connecting the fieldbus intelligent device 22 to the PROFINET network and N fieldbus intelligent devices 22. Each IO device field unit 21 has at least two Ethernet ports and M fieldbus interfaces, and each fieldbus intelligent device 22 is respectively connected to a fieldbus interface of the IO device field unit 21 of the field module 20 to which it belongs, and N≤M.

[0038] like Figure 3 As shown, the IO device field unit 21 of the embodiment of the present application is connected in series with two Ethernet ports of the controller 10. That is, one Ethernet port of the first IO device field unit 21 is connected to one Ethernet port of the controller 10 through an Ethernet cable; one Ethernet port of the i-th IO device field unit 21 is connected to one Ethernet port of the i-1th IO device field unit 21 through an Ethernet cable, and another Ethernet port of the i-th IO device field unit 21 is connected to one Ethernet port of the i+1th IO device field unit 21 through an Ethernet cable; one Ethernet port of the last IO device field unit 21 in series is connected to one Ethernet port of the previous IO device field unit 21 through an Ethernet cable, and another Ethernet port of the last IO device field unit 21 in series is connected to another Ethernet port of the controller 10 through an Ethernet cable.

[0039] In this embodiment, the IO device field unit 21 is connected in series between two Ethernet ports of the controller 10, thereby converting the linear bus topology into a ring topology. The ring topology provides link backup and improves network reliability.

[0040] Optionally, based on the above embodiment, each IO device field unit 21 is configured to automatically allocate a communication address to a fieldbus intelligent device 22 connected to the IO device field unit 21 .

[0041] In large-scale projects, there are many fieldbus intelligent devices 22. If the communication addresses are set manually, the efficiency is low. In this embodiment, each IO device field unit 21 can automatically assign a communication address to the fieldbus intelligent device 22 connected to the IO device field unit 21, thereby greatly saving time and improving work efficiency.

[0042] Optionally, based on the above embodiment, the fieldbus intelligent device 22 is a fieldbus PA device, and the IO device field unit 21 is configured to automatically allocate a PA address to the fieldbus intelligent device 22 connected to the IO device field unit 21 .

[0043] In one embodiment, the IO device field unit 21 is configured to read the basic data of the fieldbus PA device without configuration.

[0044] In digital power plants and digital factory projects in the water treatment industry, one of the challenges faced is how to connect a large number of PA devices on the project site to the PROFINET network at low cost and high efficiency. In the communication system for fieldbus intelligent devices of the present application, each IO device field unit 21 can be connected to N fieldbus intelligent devices 22, and the controller 10 can connect up to 256 IO device field units 21 in series. Taking N=8 as an example, the communication system for fieldbus intelligent devices of the present application can connect 2048 fieldbus intelligent devices 22 to the PROFINET network at one time, and the IO device field unit 21 can automatically assign communication addresses to the fieldbus intelligent devices 22 connected to the IO device field unit 21, and can read the basic data of the fieldbus PA device without configuration, thereby greatly improving efficiency.

[0045] Optionally, based on the above embodiment, the length of the Ethernet cable connected to the two IO device field units 21 is less than 100m, thereby ensuring the transmission rate.

[0046] In some projects, the environment of the project site is complex, and the distance between the IO device field unit 21 and the controller 10 is relatively far. If an Ethernet cable is used directly for connection, the length of the Ethernet cable connected between the IO device field unit 21 and the controller 10 and / or the Ethernet cable connected to two IO device field units 21 is greater than 100m. To solve the above problem, in this embodiment, a photoelectric converter is set between the IO device field unit 21 and the controller 10, and the Ethernet port of the photoelectric converter is connected to the controller 10 through an Ethernet cable, and the optical fiber interface of the photoelectric converter is connected to the first IO device field unit 21 connected in series through an optical cable, and the length of the Ethernet cable connected between the photoelectric converter and the controller 10 is less than 100m. By setting a photoelectric converter, the length of the Ethernet cable connected between the photoelectric converter and the controller 10 and the Ethernet cable connected to the IO device field unit 21 are both less than 100m, thereby minimizing the cost of hardware equipment on the basis of ensuring the transmission rate.

[0047] In other embodiments, F signal amplifiers may be connected in series between the IO device field unit 21 and the controller 10, wherein the length of the Ethernet cable between two adjacent signal amplifiers, between the signal amplifier adjacent to the controller 10 and the controller 10, and between the signal amplifier adjacent to the IO device field unit 21 and the IO device field unit 21 is less than 100 meters, and F≥1.

[0048] Optionally, several switches may be connected in series between the IO device field unit 21 and the controller 10 as signal amplifiers.

[0049] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0050] The above description is only an illustrative specific implementation of the embodiment of the present application, and is not intended to limit the scope of the embodiment of the present application. Any equivalent changes, modifications and combinations made by any technician in this field without departing from the concept and principle of the embodiment of the present application should fall within the scope of protection of the embodiment of the present application.

Claims

1. A communication system for fieldbus intelligent devices, characterized in that: include: A controller (10) provided with an Ethernet port; At least one field module (20), each field module (20) comprising an IO device field unit (21) and N fieldbus intelligent devices (22); wherein the IO device field unit (21) is used to connect the fieldbus intelligent device (22) to a PROFINET network, the IO device field unit (21) has at least two Ethernet ports and M fieldbus interfaces, each fieldbus intelligent device (22) is respectively connected to a fieldbus interface of the IO device field unit (21), N≤M; as well as An Ethernet port of the first IO device field unit (21) is connected to an Ethernet port of the controller (10) via an Ethernet cable, and the IO device field units (21) are connected in series via the Ethernet cable.

2. The communication system for field bus intelligent devices according to claim 1, characterized in that: The IO device field unit (21) is configured to automatically allocate a communication address to a field bus intelligent device (22) connected to the IO device field unit (21).

3. The communication system for field bus intelligent devices according to any one of claims 1 or 2, characterized in that: An Ethernet port of the last IO device field unit (21) connected in series is connected to an Ethernet port of the controller (10) via an Ethernet cable.

4. The communication system for field bus intelligent devices according to claim 3, characterized in that: The fieldbus intelligent device (22) is a fieldbus PA device, and the IO device field unit (21) is configured to automatically allocate a PA address to the fieldbus intelligent device (22) connected to the IO device field unit (21).

5. The communication system for field bus intelligent devices according to claim 4, characterized in that: The length of the Ethernet line connected to the two IO device field units (21) is less than 100m.

6. The communication system for field bus intelligent devices according to claim 5, characterized in that: When the length of the Ethernet cable connected between the IO device field unit (21) and the controller (10) is greater than or equal to 100 meters, a photoelectric converter is provided between the IO device field unit (21) and the controller (10), the Ethernet port of the photoelectric converter is connected to the controller (10) via the Ethernet cable, and the optical fiber interface of the photoelectric converter is connected to the IO device field unit (21) via an optical cable; and the length of the Ethernet cable connected between the photoelectric converter and the controller (10) is less than 100 meters.

7. The communication system for field bus intelligent devices according to claim 5, characterized in that: When the length of the Ethernet cable connected between the IO device field unit (21) and the controller (10) is greater than or equal to 100 meters, F signal amplifiers are arranged between the IO device field unit (21) and the controller (10), wherein the length of the Ethernet cable between two adjacent signal amplifiers, between the signal amplifier adjacent to the controller (10) and the controller (10), and between the signal amplifier adjacent to the IO device field unit (21) and the IO device field unit (21) is less than 100 meters, and F≥1.

8. The communication system for field bus intelligent devices according to claim 7, characterized in that: The signal amplifier is a switch.

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