CN113300741A

CN113300741A - PLC divides accuse ware and control system

Info

Publication number: CN113300741A
Application number: CN202110573942.9A
Authority: CN
Inventors: 刘道坤; 徐敏馨
Original assignee: Lite Puter Technology Shanghai Co ltd
Current assignee: Lite Puter Technology Shanghai Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-08-24
Anticipated expiration: 2041-05-25
Also published as: CN113300741B

Abstract

The embodiment of the application provides a PLC divides accuse ware and control system, PLC divides the accuse ware to include: a first PLC module for connecting a first power line; a second PLC module for connecting to a second power line; the serial port module is respectively connected with the first PLC module and the second PLC module, and the first PLC module and the second PLC module are communicated through the serial port module. The method and the device realize reduction of communication message time delay and increase of message sending success rate.

Description

PLC divides accuse ware and control system

Technical Field

The application relates to the technical field of communication, in particular to a PLC branch controller and a control system.

Background

The PLC (Power line Communication) is a Communication technology for data transmission through a Power line, and the technology uses the existing Power grid as a transmission medium of signals, so that the Power grid can transmit Power and perform data Communication at the same time, and this way can effectively monitor and control Power equipment, meters and household appliances in the Power grid. In the MESH network (MESH network) mode, the number of the communication messages using the whole network is large, and when the number of the stations is large or the transmission density is high, the message transmission collision is easily caused, and the transmission success rate and the time delay are influenced. When in a networking mode, the more the number of nodes of the PLC network is, the greater the PLC signal is absorbed, which may cause the more the hierarchy of the PLC network and increase the message transmission delay.

Disclosure of Invention

An object of the embodiment of the present application is to provide a PLC slave controller and a control system, so as to reduce a communication packet delay and improve a packet sending success rate.

The first aspect of the embodiment of the present application provides a PLC divides accuse ware, includes: a first PLC module for connecting a first power line; a second PLC module for connecting to a second power line; the serial port module is respectively connected with the first PLC module and the second PLC module, and the first PLC module and the second PLC module are communicated through the serial port module.

In one embodiment, the first PLC module includes: the first voltage transformation unit is used for connecting a first power line; and the first signal processing unit is connected with the first voltage transformation unit and the serial port module.

In one embodiment, the first transforming unit includes: a first transformer comprising a first winding and a second winding; and one end of the first winding of the first transformer is connected to the first power line through the first capacitor.

In one embodiment, the second PLC module includes: the second transformation unit is used for connecting a second power line; and the second signal processing unit is connected with the second voltage transformation unit and the serial port module.

In one embodiment, the second transforming unit includes: a second transformer comprising a third winding and a fourth winding; and one end of the third winding of the second transformer is connected to the second power line through the second capacitor.

In an embodiment, the serial port module includes a UART serial port.

A second aspect of the embodiments of the present application provides a PLC control system, including: the PLC subsystem comprises a plurality of PLC subsystems, wherein each PLC subsystem comprises a PLC sub-controller of the first aspect and any embodiment of the first aspect; and the host and the PLC sub-controllers in the plurality of PLC subsystems are simultaneously connected to the same power bus.

In an embodiment, the host and all the PLC slave controllers are networked, each of the PLC subsystems is networked independently, and a power carrier is used between the host and the PLC slave controllers to transmit signals through the power bus.

In one embodiment, the PLC subsystem further includes: control module, panel and at least one PLC equipment, control module the panel with the PLC equipment is connected on same power line, the power line is connected PLC divides the accuse ware.

In one embodiment, the PLC control system further includes: and the isolator is arranged at an alternating current input end, and alternating current is input into the PLC subsystem and the host through the isolator.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a PLC slave according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a PLC slave according to another embodiment of the present application;

fig. 3 is a schematic structural diagram of a PLC control system according to an embodiment of the present application.

Reference numerals:

100-a PLC sub-controller, 110-a first PLC module, 111-a first transformation unit, 112-a first signal processing unit, 113-a first transformer, 114-a first winding, 115-a second winding, 116-a first capacitor, 120-a second PLC module, 121-a second transformation unit, 123-a second transformer, 124-a third winding, 125-a fourth winding, 126-a second capacitor, 122-a second signal processing unit, 130-a serial port module, 140-a first power line, 150-a second power line;

200-PLC control system, 210-PLC subsystem, 211-control module, 212-panel, 213-PLC device, 214-power line, 220-host, 230-isolator, 240-power bus.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

In the description of the present application, the terms "first," "second," and the like are used for distinguishing between descriptions and do not denote an order of magnitude, nor are they to be construed as indicating or implying relative importance.

In the description of the present application, the terms "comprises," "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

In the description of the present application, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are absolutely required to be horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer", and the like refer to orientations or positional relationships that are based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally found in the products of the application, and are used for convenience in describing the present application, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, the terms "mounted," "disposed," "provided," "connected," and "configured" are to be construed broadly unless expressly stated or limited otherwise. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be internal to two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Please refer to fig. 1, which is a schematic structural diagram of a PLC slave 100 according to an embodiment of the present application, wherein the PLC slave 100 includes: the power line connector comprises a first PLC module 110, a second PLC module 120 and a serial port module 130, wherein the first PLC module is used for being connected with a first power line 140, the second PLC module 120 is used for being connected with a second power line 150, the serial port module 130 is respectively connected with the first PLC module 110 and the second PLC module 120, and the first PLC module 110 and the second PLC module 120 are communicated through the serial port module 130.

In one embodiment, the first PLC module 110 includes: the first transformer unit 111 is used for connecting with the first power line 140, and the first signal processing unit 112 is connected with the first transformer unit 111 and the serial port module 130.

In one embodiment, the second PLC module 120 includes: a second voltage transformation unit 121 and a second signal processing unit 122, where the second voltage transformation unit 121 is used to connect to the second power line 150, and the second signal processing unit 122 is connected to the second voltage transformation unit 121 and the serial port module 130.

In one embodiment, the serial module 130 includes a UART (Universal Asynchronous Receiver/Transmitter) serial port.

In an embodiment, the first power line 140 and the second power line 150 are electrically independent PLC buses, signals on the two buses are decoded by the first signal processing unit 112 or the second signal processing unit 122, and the first PLC module 110 and the second PLC module 120 communicate with each other through the serial port module 130 (UART). For example, the PLC signal of the first power line 140 is decoded by the first signal processing unit 112 and then sent to the second signal processing unit 122 through the serial port module 130, and the second signal processing unit 122 converts the received serial port signal into a PLC signal and sends the PLC signal to the second power line 150.

As shown in fig. 2, which is a schematic structural diagram of the PLC slave 100 according to an embodiment, the PLC slave 100 includes: first PLC module 110, second PLC module 120 and serial port module 130, wherein, first PLC module 110 includes: the first transformer unit 111 is used for connecting with the first power line 140, and the first signal processing unit 112 is connected with the first transformer unit 111 and the serial port module 130. The second PLC module includes: a second voltage transformation unit 121 and a second signal processing unit 122, where the second voltage transformation unit 121 is used to connect to the second power line 150, and the second signal processing unit 122 is connected to the second voltage transformation unit 121 and the serial port module 130. The serial module 130 is a UART serial port.

In one embodiment, the first transforming unit 111 includes: a first transformer 113 and a first capacitor 116, the first transformer 113 comprising a first winding 114 and a second winding 115, one end of the first winding 114 of the first transformer 113 being connected to a first power line 140 via the first capacitor 116.

In one embodiment, the second transforming unit 121 includes: a second transformer 123 and a second capacitor 126, the second transformer 123 comprising a third winding 124 and a fourth winding 125, one end of the third winding 124 of the second transformer 123 being connected to the second power line 150 via the second capacitor 126.

As shown in fig. 3, which is a schematic structural diagram of a PLC control system 200 according to an embodiment of the present application, the PLC control system 200 includes: the PLC subsystems 210 include PLC slave controllers 100, the host 220 and the PLC slave controllers 100 of the PLC subsystems 210 are simultaneously connected to the same power bus 240, and fig. 3 illustrates three PLC subsystems 210.

In one embodiment, the PLC subsystem 210 further includes: the PLC control system comprises a control module 211, a panel 212 and at least one PLC device 213, wherein the control module 211, the panel 212 are connected to the same power line 214, and the power line 214 is connected with the PLC sub-controller 100. In one embodiment, the control module 211 may be used to control a terminal such as a window covering, a lighting device, etc.

In an embodiment, the PLC control system 200 further includes: an isolator 230, the isolator 230 being disposed at an alternating current input terminal (AC IN), the alternating current being input to the PLC subsystem 210 and the host 220 via the isolator 230.

The host 220 and all the PLC slave controllers 100 form a PLC master network, and power carriers are used between the host 220 and the PLC slave controllers 100 to transmit signals through the power bus 240.

Each PLC subsystem 210 is networked independently to form a PLC sub-network, different PLC subsystems 210 are independent from each other in PLC communication, and the number of nodes under each PLC subsystem 210 is only the number of PLC devices 213 under the subsystem.

Because the whole PLC control system 200 can be split into a PLC main network and a plurality of PLC sub-networks, for example, the PLC control system 200 in fig. 3 is split into a PLC main network and three PLC sub-networks, and the number of PLC nodes is divided into 4 parts, so that the number of nodes in each part is relatively small, which can reduce the node load in the PLC network, reduce the consumption of PLC signals in the bus, greatly shorten the networking time, reduce the network hierarchy, and reduce the collision influence of communication packet transmission in the MESH network mode (without CCO), thereby improving the transmission success rate and reducing the time delay.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only a preferred embodiment of the present application, and is only for the purpose of illustrating the technical solutions of the present application, and not for the purpose of limiting the present application. Any modification, equivalent replacement, improvement or the like, which would be obvious to one of ordinary skill in the art and would be within the spirit and principle of the present application, should be included within the scope of the present application.

Claims

1. The utility model provides a PLC branch accuse ware which characterized in that includes:

a first PLC module for connecting a first power line;

a second PLC module for connecting to a second power line;

the serial port module is respectively connected with the first PLC module and the second PLC module, and the first PLC module and the second PLC module are communicated through the serial port module.

2. The PLC slave according to claim 1, wherein the first PLC module comprises:

the first voltage transformation unit is used for connecting a first power line;

and the first signal processing unit is connected with the first voltage transformation unit and the serial port module.

3. The PLC slave controller according to claim 2, wherein the first transforming unit comprises:

a first transformer comprising a first winding and a second winding;

and one end of the first winding of the first transformer is connected to the first power line through the first capacitor.

4. The PLC slave according to claim 1, wherein the second PLC module comprises:

the second transformation unit is used for connecting a second power line;

and the second signal processing unit is connected with the second voltage transformation unit and the serial port module.

5. The PLC slave according to claim 4, wherein the second transforming unit comprises:

a second transformer comprising a third winding and a fourth winding;

and one end of the third winding of the second transformer is connected to the second power line through the second capacitor.

6. The PLC slave according to claim 1, wherein the serial port module comprises a UART serial port.

7. A PLC control system, comprising:

a plurality of PLC subsystems, the PLC subsystems comprising the PLC slave of any of claims 1-6;

and the host and the PLC sub-controllers in the plurality of PLC subsystems are simultaneously connected to the same power bus.

8. The PLC control system according to claim 7, wherein the host is networked with all the PLC slave devices, each PLC subsystem is networked independently, and a power carrier is used between the host and the PLC slave devices to transmit signals through the power bus.

9. The PLC control system of claim 7, wherein the PLC subsystem further comprises: control module, panel and at least one PLC equipment, control module the panel with the PLC equipment is connected on same power line, the power line is connected PLC divides the accuse ware.

10. The PLC control system according to claim 7, further comprising:

and the isolator is arranged at an alternating current input end, and alternating current is input into the PLC subsystem and the host through the isolator.