KR20130001768A

KR20130001768A - Plc module using function block stucture

Info

Publication number: KR20130001768A
Application number: KR1020110062610A
Authority: KR
Inventors: 이호기
Original assignee: 엘에스산전 주식회사
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2013-01-07

Abstract

PLC module according to an embodiment of the present invention is a printed circuit board; At least one mounting portion formed on the printed circuit board and including a connection portion for connecting at least one unit module; And at least one unit module respectively mounted to the at least one mounting unit and connected to the connection unit, wherein the unit module is detachable from each mounting unit.

Description

PLC module using function block stucture

The present invention relates to a PLC module, and more particularly to a PLC module configured in the form of a functional block.

In traditional industrial sites, automation equipment consisted of mechanical equipment such as relays. In order to change the function of the automation equipment which is a mechanical device, there was a difficulty in rewiring the internal circuits of the equipment. The PLC was created to solve this problem.

The PLC is a programmable logical controller. The PLC generally acts like a computer. It receives signals from the machine and processes them according to the contents programmed therein, and then outputs the processed signals to the machine. PLC replaces the functions of control devices such as relays, timers, and counters with semiconductor devices such as integrated devices and transistors, and adds arithmetic functions to basic sequence control functions, and enables program control. According to the predetermined logic. The PLC can be applied to various tasks such as device control, device numerical setting, time control, real-time monitoring, real-time data collection, and safety device operation.

The PLC has an analog output module for providing a signal to a machine such as an automation facility and an analog input module for receiving a signal from the machine. The analog input module is for converting an analog signal provided from a machine into a digital signal and providing it to an internal arithmetic processing unit. The analog output module receives a digital signal that reflects the result of the calculation processing provided by the calculation processing unit, converts the analog signal into an analog signal, and delivers it to the machine.

1 is a view showing a PLC module according to the prior art.

Referring to FIG. 1, the PLC module includes an analog unit 10 for dividing, amplifying, and converting an analog signal, an insulation unit 20 that insulates the analog unit and a digital unit, and a power supply for supplying power to the analog unit 10. At least one analog channel unit 40 composed of a supply unit 30, an external power supply unit 50 that receives power from the outside in the case of a module requiring external power supply, and transmits a control signal from the PLC to the module It includes a microprocessor unit 60.

The analog isolated PLC module receives an analog signal input from the outside for each channel through a plurality of analog channel units 40, converts the received analog signal into a digital signal, and then converts the macro processor unit 60. Will output

However, since the PLC module as described above is composed of a single printed circuit board as a module composed of several functional blocks, when an arbitrary functional block fails, not only the specific functional block in which the failure occurs but also the entire module. There is a problem that must be replaced, accordingly expensive replacement.

In an embodiment according to the present invention, in a module composed of a plurality of functional blocks, each functional block may be manufactured in a block type module, and the block type module may be assembled to produce one complete module.

In addition, in an embodiment according to the present invention, in a module composed of a plurality of functional blocks, when any one of the plurality of functional blocks fails, only the specific functional blocks can be selectively replaced.

The technical problems to be achieved in the proposed embodiment are not limited to the technical problems mentioned above, and other technical problems not mentioned above are clear to those skilled in the art to which the proposed embodiments belong from the following description. Can be understood.

The unit module may include at least one of a first unit module that receives an analog signal and outputs the digital signal, and a second unit module that receives the digital signal and outputs the analog signal.

The first unit module may include an analog input unit for receiving an analog signal input from an external device, an amplifier for amplifying the input analog signal, a converter for converting the amplified analog signal into a digital signal, and an analog unit. And a power supply unit supplying driving power to the first unit module.

The second unit module may further include an insulation unit for insulating the analog unit and the digital unit, a conversion unit for converting the digital signal transmitted from the microprocessor unit into an analog signal, an amplifier unit for amplifying the converted analog signal, and It includes a signal transmission unit for outputting the amplified analog signal to an external device.

The apparatus may further include a selection switch provided corresponding to each of the mounting units, and selectively operates only a unit module mounted on the mounting unit in which the selection switch is turned on.

The apparatus may further include at least one type selection switch for selecting a type for each unit module mounted on the mounting unit. The unit module selected by the first type based on the type selection switch may include the first unit module. The unit module in which the second type is selected based on the type selection switch operates as the second unit module.

The unit module may include a first unit module including an analog unit connected to an external device, and converts an analog signal transmitted from the first unit module into a digital signal and outputs the digital signal, or converts a digital signal transmitted from a microprocessor unit into an analog unit. And a second unit module converting the signal into the first unit module and transmitting the signal to the first unit module, wherein the first and second unit modules are mounted to different mounting units, respectively.

The apparatus may further include a selection switch for selecting an operating state of the first unit module mounted on the mounting unit, wherein the selection switch is disposed corresponding to the number of mounting of the first unit module.

The apparatus may further include a type selection switch for selecting an input / output type of the first and second unit modules. When the type selection switch is selected as the first type, the first and second unit modules receive an analog signal. The analog signal is converted into a digital signal and outputted, and when the type selection switch is selected as the second type, the first and second unit modules receive the digital signal and convert the digital signal into an analog signal and output the converted analog signal.

In addition, the PLC module according to an embodiment of the present invention includes a first mounting portion including an accommodation space for accommodating a unit module having a first function; A second mounting part including an accommodating space for accommodating a unit module having a second function; A first unit module mounted on the first mounting unit, the first unit module including a plurality of blocks configured to perform the first function as one package; And a second unit module mounted on the second mounting unit and configured with a plurality of blocks configured to perform the second function in one package, wherein the first and second unit modules are detachable from the first and second mounting units. It is characterized by possible.

The apparatus may further include a first selection switch for determining an operating state of the first unit module mounted to the first mounting unit, and a second selection switch for determining an operating state of the second unit module mounted to the second mounting unit. The first and second unit modules selectively perform the first and second functions according to the states of the first and second selection switches.

The apparatus may further include a first type selection switch that determines the input / output type of the first unit module mounted on the first mounting unit, and a second type selection switch that determines the input / output type of the second unit module mounted on the second mounting unit. The first and second unit modules perform one of a first function and a second function according to the selection state of the first and second type selection switches.

According to an embodiment of the present invention, by configuring each functional block as one unit module, when one unit module fails, only the failed unit module can be used instead of the entire module, thereby reducing maintenance costs. In the case of a module composed of multiple channels, only the required number of channels can be assembled and used as a unit module, or when additional channels are required, only additional unit modules can be purchased and installed, thereby providing channel expandability and user convenience. have.

1 is a view showing a PLC module according to the prior art.
2 to 4 are diagrams for describing a PLC module according to a first embodiment of the present invention.
5 to 8 are diagrams for describing a PLC module according to a second embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

2 is a view showing a PLC module according to a first embodiment of the present invention, Figure 3 is a view showing a unit module mounted on the PLC module, Figure 3 is a state in which the unit module is mounted on the PLC module FIG. 4 is a diagram illustrating a state in which the unit module illustrated in FIG. 3 is mounted on the PLC module illustrated in FIG. 2.

Hereinafter, a PLC module according to a first embodiment of the present invention will be described with reference to FIGS. 2, 3, and 4.

2, the PLC module 200 includes a printed circuit board 210, a mounting unit 220, an external power supply unit 230, a microprocessor unit 240, a selection switch 250, and a type selection switch 260. It includes.

The printed circuit board 210 is a rectangular plate-shaped insulating plate having a predetermined thickness, and FR4, prepreg, glass-epoxy resin, glass-containing epoxy resin, BT (Bismaleimide Triazine) resin, etc. may be used. Can be. A metal wiring layer may be formed on the printed circuit board 210. The metal wiring layer is a copper wiring layer, and is formed by attaching copper foil on the printed circuit board 210 and patterning the same by a photolithography process. The metal wiring layer may include a ground wiring layer and a ground wiring layer.

The mounting unit 220 may include a connection unit (not shown) for connecting the unit module, and provides a mounting space in which the unit module may be mounted.

When the unit module mounted on the mounting unit 220 is a module requiring external power supply, the external power supply unit 230 supplies driving power to the unit module mounted on the mounting unit 220.

The microprocessor unit 240 controls the overall operation of the PLC module 200.

For example, the microprocessor unit 240 controls an analog signal input through an external device to be converted into a digital signal by a unit module mounted on the mounting unit 220.

In addition, the microprocessor unit 240 provides a digital signal to the unit module mounted on the mounting unit 220, and thereby controls the digital signal to be converted into an analog signal through the unit module.

The selection switch unit 250 may select whether to operate the unit module mounted in each mounting unit 220. To this end, the selection switch unit 250 is formed to correspond to the number of the mounting unit 220.

That is, as shown in FIG. 2, when the mounting unit 220 includes a first mounting unit 220a, a second mounting unit 220b, a third mounting unit 220c, and a fourth mounting unit 220d, the selection switch The unit 250 may determine whether the unit module mounted on the first mounting unit 220a is operated by the first selection switch 250a and the unit module mounted on the second mounting unit 220b. Selectable second selection switch 250b, unit mounting on the third mounting unit 220c or not, operation of the third selection switch 250c and the fourth mounting unit 220d It may include a fourth selection switch 250d for selecting whether to operate the module.

In this case, when the first selection switch 250a is selected to be on, the unit module mounted on the first mounting unit 220a performs a corresponding operation under the control of the microprocessor unit 240. However, when the first selection switch 250a is selected to be off, the unit module mounted in the first mounting unit 220a may not exist, and even if the unit module mounted in the first mounting unit 220a exists. The unit module does not operate.

The type selection switch unit 260 may select an input / output type for the unit module mounted in each mounting unit 220. To this end, the type selection switch unit 260 is formed corresponding to the number of the mounting unit 220.

That is, as shown in FIG. 2, when the mounting part 220 includes the first mounting part 220a, the second mounting part 220b, the third mounting part 220c, and the fourth mounting part 220d, the type selection is performed. The switch unit 250 includes a first type selection switch 260a for selecting an input / output type for the unit module mounted on the first mounting unit 220a, and an input / output for the unit module mounted on the second mounting unit 220b. A second type selector switch 260b for selecting a type, a third type selector switch 260c for selecting an input / output type for a unit module mounted on the third mounting unit 220c, and a fourth mounting unit 220d. The fourth type selection switch 260d may select an input / output type for the unit module mounted in the module.

In this case, when a first type is selected by the first type selection switch 260a, an operation of the unit module mounted on the first mounting unit 220a corresponds to the analog input module under the control of the microprocessor unit 240. Will be performed. In addition, when the second type is selected by the first type selection switch 260a, the unit module mounted on the first mounting unit 220a performs an operation corresponding to the analog output module.

The type may be determined according to whether the first unit module 310 or the second unit module 320 is mounted on the mounting unit 220.

If the first unit module 310 is mounted on the first mounting unit 220a, the user selects the first type selection switch 260a as the first type and accordingly the first unit module ( 310 may operate as an analog input module. However, when the unit module mounted on the first mounting unit 220a is replaced with the second unit module 320 due to a failure of the first unit module 310 mounted on the first mounting unit 220a, the user The second type module 320 may be operated as an analog output module by selecting the first type selection switch 260a as the second type.

PCL module 200 according to the present invention configured as described above is formed with at least one mounting unit 220 to which the unit module is removable. The mounting module 220 may be equipped with a unit module, and the mounted unit module may be separated from the mounting unit 220 according to a situation.

The unit module may be divided into a first unit module 310 and a second unit module 320.

The first unit module 310 corresponds to an analog input module, and the second unit module 320 corresponds to an analog output module.

Referring to FIG. 3, the first unit module 310 may include an analog input unit 311, an insulation unit 312, and a power supply unit 313.

The analog input unit 311 is connected to an external device, receives an analog input through the external device, amplifies the received analog signal, converts the received analog signal, and outputs the converted analog signal.

The insulation portion 312 insulates the analog portion and the digital portion. In this case, the insulation part 312 may be implemented as a photo coupler.

The power supply unit 313 supplies driving power to the first unit module 310.

As described above, the first unit module 310 includes a plurality of blocks, and the plurality of blocks is configured in one package form.

Referring to FIG. 4, the first unit module 310 will be described in more detail.

Referring to FIG. 4, the first unit module 310 includes a signal input unit 311a, an amplifier 311b, a converter 311c, an insulation unit 312, a power supply unit 313a, and a DC-DC converter 313b. ) May be included.

The signal input unit 311a includes a channel terminal and is connected to an external device through the channel terminal. The signal input unit 311a receives an analog signal through the connected external device. In this case, the input analog signal may be an analog current signal or an analog voltage signal.

The amplifier 311b amplifies an analog signal of an external device input through the signal input unit 311a.

The converter 311c converts the signal amplified by the amplifier 311b into a digital signal.

The insulator 312 is transmitted to the microprocessor unit 240 as a digital signal converted by the converter 311. In this case, the insulator 312 is a signal and a microprocessor output from the converter 311c. The signal input from the unit 240 is electrically insulated and transmitted.

The power supply unit 313a and the DC-DC converter 313b are devices for supplying operating power of the first unit module 310 configured as described above, and DC 24V of the power supply unit 313a is a DC-DC converter 313b. Is converted to DC 5V.

As described above, the first module 310 may include a signal input unit 311a, an amplifier 311b, a converter 311c, an insulation unit 312, a power supply unit 313a, and a DC-DC converter 313b. It consists of a plurality of building blocks in one package form.

The second module 320 differs only in the input / output type from the first module 310, and the other parts are the same.

That is, the second module 320 corresponds to an analog output module. Unlike the first module 310, the second module 320 receives a digital signal from the microprocessor unit 240 and converts the received digital signal into an analog signal. After the conversion, it outputs to the connected external device.

As such, according to the present invention, the PLC module 200 includes a printed circuit board 210 including a mounting unit 220, and a unit module to be mounted on the mounting unit 220, and separately provided to the mounting unit 220. It is installed and performs the corresponding operation.

5 illustrates a PLC module in which a unit module is mounted on the mounting unit 220.

Referring to FIG. 5, it can be seen that the PLC module includes four mounting units 220 and the unit module is mounted only on the first mounting unit 220a and the third mounting unit 220c of the mounting unit 220. have. In addition, the unit module mounted on the first mounting unit 220a is the first unit module 310, and the unit module mounted on the third mounting unit 220c is the second unit module 320.

That is, the user can mount and use the unit module only in the mounting unit 220 desired by the user among the plurality of mounting units 220 as described above. Accordingly, the additional unit module is installed in the mounting unit 220 of the spare unit in which the unit module is not mounted. The number of analog channels can be increased by mounting.

In addition, when the unit module mounted on the first mounting unit 220a is broken while the unit module is mounted as described above, the user replaces the unit module mounted on the first mounting unit 220a with the first mounting unit 220a. It can be separated from the unit, and thus a newly purchased unit module can be mounted and used in the first mounting unit 220a.

In this case, the user may select whether to operate the unit module mounted on each of the mounting units 220 by using the selection switch 250.

In FIG. 5, since the unit module is mounted only on the first mounting unit 220a and the third mounting unit 220c, the first selection switch 250a corresponding to the first mounting unit 220a and the third mounting unit 220c may be formed. The third selection switch 250c may be selected to be on, and the remaining second selection switch 250b and the fourth selection switch 250d may be selected to be off. In this case, when the user wants to use only the unit module mounted on the first mounting unit 220a, the user changes the third selection switch 250c to off to operate the unit module mounted on the third mounting unit 220c. You may not.

In addition, the user may select the input / output type of each module mounted on the mounting unit 220 dp using the type selection switch 260.

Referring to FIG. 5, only the first type selection switch 260a of the type selection switch 260 is selected as the first type, and the second, third and fourth type selection switches 260b, 260c, and 260d are second. You can see that it is selected as the type.

In this case, when there is a unit module mounted on the first mounting unit 220a, the unit module mounted on the first mounting unit 220a operates as an analog input module, and the second, third, and fourth mounting units 220b. The unit modules mounted on the 220c and 220d may operate as analog output modules.

As described above, according to the exemplary embodiment of the present invention, each functional block is configured as one unit module, and when one unit module fails, only a failed unit module can be used instead of the entire module, thereby maintaining maintenance cost. In this case, a module composed of several channels can be assembled and used as many unit modules as necessary, or if additional channels are required, only additional unit modules can be purchased and installed, thereby providing channel expandability and user convenience. can do.

6, 7 and 8 are diagrams for describing a PLC module according to a second embodiment of the present invention.

Referring to FIG. 6, the PLC module 600 according to the second embodiment may include a printed circuit board 610, a first mounting unit 620, a second mounting unit 630, an external power supply unit 640, and an insulating unit 650. ), A microprocessor unit 660, a selection switch 670, and a type selection switch 680.

In this case, the external power supply unit 640, the insulation unit 650, the microprocessor unit 660, the selection switch 670, and the type selection switch 680 are the same as the operation of the PLC module according to the first embodiment. The description thereof will be omitted.

Unlike the PLC module according to the first embodiment, the present invention includes a plurality of first mounting units 620 and one second mounting unit 630.

The first mounting unit 620 provides a mounting space for mounting the unit module, and the first mounting unit 620 includes a first unit module 710a including an analog input unit for operating as an analog input module. On the contrary, it may be mounted on the first unit module 710b including an analog output unit for operating as an analog output module.

The second unit module 720 is mounted on the second mounting unit 630. In this case, when the analog input module is mounted in the first mounting unit 620, the second unit module 720 may include a converting unit 721 for converting an analog signal into a digital signal. Amplifying unit 722 for amplifying the digital signal and a mux unit 720 for distributing the signal to a plurality of analog inputs included in the first unit module 710a.

On the contrary, when the analog output module is mounted in the first mounting unit 620, the second unit module 720 receives a digital signal and converts it into an analog signal, and the converted analog signal. And an amplifying unit 722 for amplifying a, and a mux unit 723 for distributing the amplified analog signal to all analog output units included in the first unit module 710b.

Referring to FIG. 8, four first unit modules 710a including an analog input unit may be mounted on the first mounting unit 620, and the first unit module 710a may be mounted on the second mounting unit 630. The second unit module 720 for converting the analog signal output through the digital signal may be mounted.

In this case, since the unit modules mounted in the first mounting unit 620 and the second mounting unit 630 operate as analog input modules, the type selection switch 680 may be selected as the first type.

In addition, since the unit modules are mounted only on four first mounting units 620 of the plurality of first mounting units 620, only the mounting unit 620 on which the unit modules are mounted among the selection switches 670 may be selected to be on. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications other than those described above are possible. For example, each component shown in detail in the embodiment of the present invention may be modified. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

200: PLC module
210: printed circuit board
220: mounting portion
230: external power supply
240: microprocessor unit
250: selector switch
260: type selector switch

Claims

Printed circuit board;
At least one mounting portion formed on the printed circuit board and including a connection portion for connecting at least one unit module; And
At least one unit module mounted to each of the at least one mounting unit and connected to the connection unit,
PLC module, characterized in that the unit module is removable from each mounting portion.

The method of claim 1,
The unit module
A first unit module for receiving an analog signal and outputting the digital signal;
A PLC module comprising at least one type of a second unit module for receiving a digital signal and outputting the analog signal.

The method of claim 2,
The first unit module
An analog input unit for receiving an analog signal input from an external device,
An amplifier for amplifying the input analog signal;
A converter for converting the amplified analog signal into a digital signal;
An insulator that insulates the analog and digital parts;
PLC module including a power supply for supplying driving power to the first unit module.

The method of claim 2,
The second unit module
An insulator that insulates the analog and digital parts;
A converter for converting the digital signal transmitted from the microprocessor to an analog signal,
An amplifier for amplifying the converted analog signal;
PLC module including a signal transmission unit for outputting the amplified analog signal to an external device.

The method of claim 2,
Further comprising a selection switch provided corresponding to each of the mounting portion,
PLC module, characterized in that for selectively operating only the unit module mounted on the mounting portion selected by the selection switch on.

The method of claim 2,
At least one type selection switch for selecting a type for each unit module mounted to the mounting portion is further included,
Based on the type selection switch, the unit module in which the first type is selected operates as the first unit module,
And a unit module in which the second type is selected based on the type selection switch operates as the second unit module.

The method of claim 1,
The unit module
A first unit module including an analog unit connected to an external device,
And a second unit module for converting an analog signal transmitted from the first unit module into a digital signal and outputting the digital signal, or for converting a digital signal transmitted from a microprocessor unit to an analog signal and transmitting the analog signal to the first unit module.
The PLC module, characterized in that the first and second unit modules are mounted to different mounting portions, respectively.

8. The method of claim 7,
The apparatus may further include a selection switch for selecting an operation state of the first unit module mounted on the mounting unit.
The selection switch is a PLC module corresponding to the mounting number of the first unit module.

8. The method of claim 7,
Further comprising a type selection switch for selecting the input and output types of the first and second unit modules,
When the type selection switch is selected as the first type, the first and second unit modules receive an analog signal, convert the analog signal into a digital signal, and output the digital signal.
And the first and second unit modules receive a digital signal, convert the digital signal into an analog signal, and output the analog signal when the type selection switch is selected as the second type.

A first mounting part including an accommodating space for accommodating a unit module having a first function;
A second mounting part including an accommodating space for accommodating a unit module having a second function;
A first unit module mounted on the first mounting unit, the first unit module including a plurality of blocks configured to perform the first function as one package; And
Is mounted on the second mounting portion, a plurality of blocks for performing the second function includes a second unit module composed of one package,
And the first and second unit modules are detachable from the first and second mounting portions.

The method of claim 10,
A first selection switch for determining an operating state of the first unit module mounted on the first mounting unit;
Further comprising a second selection switch for determining the operating state of the second unit module mounted on the second mounting portion,
And the first and second unit modules selectively perform the first and second functions according to the states of the first and second selection switches.

The method of claim 10,
A first type selection switch for determining an input / output type of the first unit module mounted on the first mounting unit;
A second type selection switch for determining the input and output type of the second unit module mounted on the second mounting portion is further included,
And the first and second unit modules perform one of a first function and a second function according to a selection state of the first and second type selection switches.