CN113300741B

CN113300741B - PLC divides accuse ware and control system

Info

Publication number: CN113300741B
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: 2023-05-23
Anticipated expiration: 2041-05-25
Also published as: CN113300741A

Abstract

The embodiment of the application provides a PLC divides accuse ware and control system, PLC divides accuse ware to include: the first PLC module is used for being connected with a first power line; the second PLC module is used for being connected with 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 the reduction of the time delay of the communication message and improve the success rate of message transmission.

Description

PLC divides accuse ware and control system

Technical Field

The application relates to the technical field of communication, in particular to a PLC (programmable logic controller) and a control system.

Background

PLC (Power line Communication, power line carrier communication) is a communication technology for performing data transmission through a power line, and the technology uses an existing power grid as a signal transmission medium, so that the power grid can perform data communication while transmitting power, and in this way, power equipment, meters and household appliances in the power grid can be effectively monitored and controlled. The message transmission conflict is easily caused when stations are more or the transmission density is high, and the transmission success rate and time delay are affected. The more nodes of the PLC network are in the networking mode, the larger the absorption of the PLC signals is, so that the more the level of the PLC network is, and the time delay of message transmission is increased.

Disclosure of Invention

An object of the embodiment of the application is to provide a PLC (programmable logic controller) controller and a control system, which are used for reducing the time delay of a communication message and improving the success rate of message transmission.

An embodiment of the present application provides a PLC controller, including: the first PLC module is used for being connected with a first power line; the second PLC module is used for being connected with 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 being connected with a first power line; the first signal processing unit is connected with the first transformation unit and the serial port module.

In an embodiment, the first transforming unit includes: a first transformer including a first winding and a second winding; and one end of a 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 being connected with a second power line; the second signal processing unit is connected with the second transformation unit and the serial port module.

In an embodiment, the second transforming unit includes: a second transformer including a third winding and a fourth winding; and one end of a 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 subsystems comprise a PLC sub-controller of the first aspect of the embodiment and any embodiment thereof; 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 computer and all the PLC sub-controllers are networked, each PLC subsystem is independently networked, and a power carrier is adopted between the host computer and the PLC sub-controllers, and signals are transmitted through the power bus.

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

In one embodiment, the PLC control system further comprises: the isolator is arranged at the input end of alternating current, and the 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 needed 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 should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic structural diagram of a PLC sub-controller 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-PLC sub-controllers, 110-first PLC modules, 111-first transformation units, 112-first signal processing units, 113-first transformers, 114-first windings, 115-second windings, 116-first capacitors, 120-second PLC modules, 121-second transformation units, 123-second transformers, 124-third windings, 125-fourth windings, 126-second capacitors, 122-second signal processing units, 130-serial port modules, 140-first power lines and 150-second power lines;

200-PLC control system, 210-PLC subsystem, 211-control module, 212-panel, 213-PLC equipment, 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 merely for distinguishing between descriptions, and do not denote a ordinal number, 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 denote that the component is required to be absolutely horizontal or overhang, but may be slightly inclined. As "horizontal" merely means that its 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," "rear," "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, or that is conventionally put in place when the product of the application is used, merely for convenience of description of the present application, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore 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 otherwise specifically defined and limited. 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 intermediaries, or through internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Please refer to fig. 1, which is a schematic structural diagram of a PLC sub-controller 100 according to an embodiment of the present application, the PLC sub-controller 100 includes: the first PLC module 110, the second PLC module 120 and the serial port module 130, wherein the first PLC module is used for connecting a first power line 140, the second PLC module 120 is used for connecting 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 voltage transformation unit 111 and the first signal processing unit 112, the first voltage transformation unit 111 is used for connecting the first power line 140, and the first signal processing unit 112 is connected with the first voltage transformation unit 111 and the serial port module 130.

In one embodiment, the second PLC module 120 includes: the second transforming unit 121 and the second signal processing unit 122, the second transforming unit 121 is used for connecting the second power line 150, and the second signal processing unit 122 is connected with the second transforming unit 121 and the serial port module 130.

In one embodiment, the serial port module 130 includes a UART (Universal Asynchronous Receiver/Transmitter, 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 communication interaction is implemented between the first PLC module 110 and the second PLC module 120 through serial port module 130 (UART) communication. For example, after the PLC signal of the first power line 140 is decoded by the first signal processing unit 112, the PLC signal is 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 the 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 a PLC sub-controller 100 according to an embodiment, the PLC sub-controller 100 includes: the first PLC module 110, the second PLC module 120, and the serial port module 130, wherein the first PLC module 110 includes: the first voltage transformation unit 111 and the first signal processing unit 112, the first voltage transformation unit 111 is used for connecting the first power line 140, and the first signal processing unit 112 is connected with the first voltage transformation unit 111 and the serial port module 130. The second PLC module includes: the second transforming unit 121 and the second signal processing unit 122, the second transforming unit 121 is used for connecting the second power line 150, and the second signal processing unit 122 is connected with the second transforming unit 121 and the serial port module 130. The serial port 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 including 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 through 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 including 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 through 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 plurality of PLC subsystems 210 and the host 220, wherein the PLC subsystem 210 includes the PLC sub-controller 100, the host 220 and the PLC sub-controllers 100 in the plurality of PLC subsystems 210 are simultaneously connected to the same power bus 240, and in fig. 3, three PLC subsystems 210 are taken as an example.

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

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

The host 220 and all the PLC sub-controllers 100 are networked to form a PLC main network, and a power carrier is adopted between the host 220 and the PLC sub-controllers 100 to transmit signals through the power bus 240.

Each PLC subsystem 210 is independently networked to form a PLC sub-network, and different PLC subsystems 210 are independent in PLC communication, and the number of nodes under each PLC subsystem 210 only calculates the number of PLC devices 213 under that 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, in fig. 3, the PLC control system 200 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, the node load in the PLC network can be reduced, the consumption of PLC signals in a bus can be reduced, the networking time can be greatly shortened, the network level can be reduced, the transmission collision influence of communication messages in the MESH network mode (without CCO) can be reduced, and therefore, the transmission success rate is improved, and the time delay is reduced.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, or the like, which would occur to one skilled in the art, are intended to be included within the spirit and principles of the present application.

Claims

1. A PLC controller, comprising:

the first PLC module is used for being connected with a first power line;

the second PLC module is used for being connected with 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; wherein, first PLC module includes:

the first transformation unit, first transformation unit is used for connecting first power line, first transformation unit includes: a first transformer including a first winding and a second winding;

a first capacitor through which one end of a first winding of the first transformer is connected to the first power line;

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

the second PLC module includes:

the second transformation unit, the second transformation unit is used for connecting the second power line, the second transformation unit includes: a second transformer including a third winding and a fourth winding;

a second capacitor through which one end of a third winding of the second transformer is connected to the second power line;

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

2. The PLC controller of claim 1, wherein the serial port module comprises a UART serial port.

3. A PLC control system, comprising:

a plurality of PLC subsystems comprising the PLC sub-controller of any one of claims 1 to 2;

the system comprises a host, wherein the host and the PLC sub-controllers in the plurality of PLC sub-systems are simultaneously connected to the same power bus, the host is networked with all the PLC sub-controllers, each PLC sub-system is independently networked, a power carrier is adopted between the host and the PLC sub-controllers, and signals are transmitted through the power bus.

4. The PLC control system of claim 3, wherein the PLC subsystem further comprises: the control module, the panel and at least one PLC equipment, the control module the panel with the PLC equipment is connected on same power line, the power line is connected the PLC branch accuse ware.

5. The PLC control system of claim 3, wherein the PLC control system further comprises:

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