TWI602062B - Power control circuit and method - Google Patents
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- TWI602062B TWI602062B TW101115124A TW101115124A TWI602062B TW I602062 B TWI602062 B TW I602062B TW 101115124 A TW101115124 A TW 101115124A TW 101115124 A TW101115124 A TW 101115124A TW I602062 B TWI602062 B TW I602062B
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- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
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Description
本發明涉及一種電源控制電路和方法，更具體地說，涉及一種透過USB為PLC供電以用於下載和除錯的電源控制電路和方法。The present invention relates to a power supply control circuit and method, and more particularly to a power supply control circuit and method for powering a PLC via USB for downloading and debugging.
現在許多PLC(Programmable Logic Controller，可編程邏輯控制器)採用USB端口來編程和除錯PLC的使用者應用程式。通常，在正常運行或編程時，PLC由外部電源供電。當使用者想要編程、下載或除錯PLC應用程式時，他們必須透過外部電源來給PLC供電。其原因是在正常運行時PLC需要的電流比USB能夠提供的要多，雖然僅對於PLC中的MCU(Microprogrammed Control Unit，微程式控制器)而言USB能夠提供的電流是足夠的。Many PLCs (Programmable Logic Controllers) now use USB ports to program and debug PLC user applications. Typically, the PLC is powered by an external power source during normal operation or programming. When users want to program, download or debug PLC applications, they must supply power to the PLC through an external power source. The reason is that the PLC requires more current than the USB can provide during normal operation, although the current that the USB can supply is sufficient only for the MCU (Microprogrammed Control Unit) in the PLC.
因此，本申請提出一種透過使用電子開關來切斷其他電路以便僅僅為PLC中的MCU供電以用於編程、除錯和下載的方法。Accordingly, the present application proposes a method of cutting off other circuits by using an electronic switch to power only the MCUs in the PLC for programming, debugging, and downloading.
第1圖中示出了現有技術的為PLC系統供電的電路圖。如第1圖所示，僅僅透過外部電源102為PLC系統103的所有電路供電。因此，即使使用者僅僅想要透過USB端口下載使用者應用程式，他們也必須連接外部電源。A circuit diagram of a prior art power supply for a PLC system is shown in FIG. As shown in Fig. 1, all circuits of the PLC system 103 are powered only by the external power source 102. Therefore, even if the user only wants to download the user application through the USB port, they must connect to an external power source.
本發明的另外方面和優點部分將在後面的描述中闡述，還有部分可從描述中明顯地看出，或者可以在本發明的實踐中得到。The other aspects and advantages of the invention will be set forth in part in the description which follows.
本發明採用USB電纜為PLC通電以進行下載和簡單的編程/除錯。The present invention uses a USB cable to power up the PLC for downloading and simple programming/debug.
本發明更便利於使用者使用PLC。The invention is more convenient for the user to use the PLC.
對於現有技術而言，即使使用者僅僅想要透過USB端口下載使用者應用程式，他們也必須連接外部電源。For the prior art, even if the user only wants to download the user application through the USB port, they must connect to an external power source.
當使用者需要下載程式或者進行一些簡單的編程和除錯時，根據本發明的方法不需要將外部電源連接到PLC系統。使用者可以利用USB將PLC連接到編程/調製設備(例如PC等)，並且PLC將被供電以進行一些主要的功能，例如下載、編程、除錯等。When the user needs to download a program or perform some simple programming and debugging, the method according to the invention does not require an external power source to be connected to the PLC system. The user can connect the PLC to a programming/modulation device (such as a PC, etc.) using USB, and the PLC will be powered to perform some major functions such as downloading, programming, debugging, and the like.
當透過USB為PLC供電時，根據本發明實施例的方法利用電子開關來切斷系統的一些部件的電力，以確保USB電源足夠為核心電路供電。When powering the PLC over USB, the method in accordance with an embodiment of the invention utilizes an electronic switch to shut off power to some of the components of the system to ensure that the USB power supply is sufficient to power the core circuitry.
本發明提供一種電源控制電路，包括：第一開關，接收來自USB端口的電力，並輸出電力到可編程邏輯控制器PLC系統的核心電路；第二開關，接收來自外部電源的電力，並輸出電力到PLC系統的核心電路；電力管理電路，根據USB端口的電力輸入狀態以及外部電源的電力輸入狀態，控制第一開關和第二開關的接通和斷開，其中，當不存在來自外部電源的電力輸入而存在來自USB端口的電力輸入時，電力管理電路控制第一開關接通以及第二開關斷開。The invention provides a power control circuit comprising: a first switch for receiving power from a USB port and outputting power to a core circuit of a programmable logic controller PLC system; and a second switch for receiving power from an external power source and outputting power To the core circuit of the PLC system; the power management circuit controls the on and off of the first switch and the second switch according to the power input state of the USB port and the power input state of the external power source, wherein when there is no external power source When power is input and there is power input from the USB port, the power management circuit controls the first switch to be turned on and the second switch to be turned off.
本發明還提供一種電源控制方法，包括：當不存在來自外部電源的電力輸入而存在來自USB端口的電力輸入時，透過USB端口為PLC系統的核心電路供電，而切斷對PLC系統其它電路的供電。The present invention also provides a power supply control method, comprising: when there is no power input from an external power source and there is power input from the USB port, powering the core circuit of the PLC system through the USB port, and cutting off other circuits of the PLC system powered by.
下面將參照示出本發明實施例的附圖充分描述本發明。然而，本發明可以以許多不同的形式實現，而不應當認為限於這裡所述的實施例。相反，提供這些實施例以便使本公開透徹且完整，並且將向本領域技術人員充分表達本發明的範圍。在附圖中，為了清楚起見放大了組件。The invention will be fully described below with reference to the drawings, which illustrate embodiments of the invention. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and the scope of the invention In the drawings, the components are exaggerated for clarity.
應當理解，當稱“元件”“連接到”或“耦接”到另一元件時，它可以是直接連接或耦接到另一元件或者可以存在中間元件。相反，當稱元件“直接連接到”或“直接耦接到”另一元件時，不存在中間元件。相同的附圖標記指示相同的元件。這裡使用的術語“和/或”包括一個或多個相關列出的專案的任何和所有組合。It will be understood that when an element is "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or the intermediate element can be present. In contrast, when an element is referred to as being "directly connected" The same reference numbers indicate the same elements. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.
應當理解，儘管這裡可以使用術語第一、第二、第三等描述各個元件、組件及/或部分，但這些元件、組件及/或部分不受這些術語限制。這些術語僅僅用於將元件、組件或部分相互區分開來。因此，下面討論的第一元件、組件或部分在不背離本發明教學的前提下可以稱為第二元件、組件或部分。It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components and/or portions, these elements, components and/or portions are not limited by these terms. These terms are only used to distinguish one element, component or part. Thus, a first element, component or portion discussed below may be referred to as a second element, component or portion without departing from the teachings of the invention.
這裡使用的術語僅僅是為了描述特定實施例的目的，而並不意圖限制本發明。這裡使用的單數形式“一”、“一個”和“那(這個)”也意圖包含複數形式，除非上下文中明確地指出不包含。應當理解，術語“包括”當用在本說明書中時指示所述特徵、整數、步驟、操作、元件及/或組件的存在，但並不排除一個或多個其他特徵、整數、步驟、操作、元件、組件及/或其組合的存在或添加。The terminology used herein is for the purpose of describing particular embodiments, and is not intended to The singular forms "a", "the", and "the" It is to be understood that the term "comprise" or "an" The presence or addition of components, components, and/or combinations thereof.
第2圖示出了根據本發明實施例的為PLC系統供電的電源控制電路圖。Figure 2 shows a power control circuit diagram for powering a PLC system in accordance with an embodiment of the present invention.
如第2圖所示，除了透過外部電源202為PLC系統203供電之外，本發明還採用USB端口201為PLC系統203的主要電路供電。As shown in FIG. 2, in addition to powering the PLC system 203 through the external power source 202, the present invention also uses the USB port 201 to power the main circuit of the PLC system 203.
在第2圖中，將PLC系統203分離成2個組：In Fig. 2, the PLC system 203 is separated into two groups:
a) 在組1中，核心電路2031能夠由外部電源202或USB 201供電，組1中的電路包括MCU以及用於編程、除錯、下載的電路，例如，MCU及/或記憶體，此外，也可以包含電流小的燈/LED、及/或端口等。a) In group 1, core circuit 2031 can be powered by external power source 202 or USB 201, and the circuit in group 1 includes an MCU and circuitry for programming, debugging, downloading, such as MCU and/or memory, in addition, It is also possible to include a lamp/LED with a small current, and/or a port or the like.
b) 在組2中，其他電路2032僅由外部電源202供電，組2中的電路包括不用於編程、除錯、下載的其他電路，例如，I/O、及/或狀態燈/LED、及/或通訊連接端口等。b) In group 2, other circuits 2032 are only powered by external power source 202, and the circuits in group 2 include other circuits that are not used for programming, debugging, downloading, such as I/O, and/or status lights/LEDs, and / or communication connection port, etc.
控制電路204控制透過外部電源202和USB端口201中的一個或兩個來對PLC系統203供電。控制電路204包括：開關ES1 2041、開關ES2 2042、以及電力管理電路2043。開關ES1和ES2例如可以用二極體、三極管、MOSFET、甚至積體電路來實現。Control circuit 204 controls powering PLC system 203 through one or both of external power source 202 and USB port 201. The control circuit 204 includes a switch ES1 2041, a switch ES2 2042, and a power management circuit 2043. The switches ES1 and ES2 can be implemented, for example, by diodes, transistors, MOSFETs, or even integrated circuits.
電力管理電路2043控制所述開關2041和2042的通斷。如第2圖所示，VCC1是來自USB端口201的電力；VCC2是來自外部電源202的電力。來自USB端口201的電力VCC1分別連接到開關2041和電力管理電路2043；來自外部電源202的電力VCC2分別連接到開關2042、電力管理電路2043和PLC系統203的其他電路2032。PLC系統203的其他電路2032直接由來自外部電源202的電力VCC2供電。而PLC系統203的核心電路2031由從開關2041和2042輸出的電力VCC供電。The power management circuit 2043 controls the on and off of the switches 2041 and 2042. As shown in FIG. 2, VCC1 is power from the USB port 201; VCC2 is power from the external power source 202. The power VCC1 from the USB port 201 is connected to the switch 2041 and the power management circuit 2043, respectively; the power VCC2 from the external power source 202 is connected to the switch 2042, the power management circuit 2043, and the other circuit 2032 of the PLC system 203, respectively. The other circuits 2032 of the PLC system 203 are powered directly by the power VCC2 from the external power source 202. The core circuit 2031 of the PLC system 203 is powered by the power VCC output from the switches 2041 and 2042.
a) 當VCC2可用並且VCC1不可用時，電力管理電路2043控制開關ES1斷開以及開關ES2接通。此時，僅透過外部電源202對PLC系統203供電。a) When VCC2 is available and VCC1 is not available, power management circuit 2043 controls switch ES1 to open and switch ES2 to turn "on". At this time, the PLC system 203 is powered only by the external power source 202.
b) 當VCC2可用並且VCC1可用時，電力管理電路2043控制開關ES1斷開以及開關ES2接通。此時，也僅透過外部電源202對PLC系統203供電。b) When VCC2 is available and VCC1 is available, power management circuit 2043 controls switch ES1 to open and switch ES2 to turn "on". At this time, the PLC system 203 is also powered only by the external power source 202.
c) 當VCC2不可用並且VCC1可用時，電力管理電路2043控制開關ES1接通以及開關ES2斷開。此時，僅來自USB端口201的電力VCC1為PLC系統203中的核心電路2031供電，以便使用者能夠進行編程、除錯、下載等主要功能。而PLC系統203中的其他電路2032未通電，處於不工作狀態。c) When VCC2 is unavailable and VCC1 is available, power management circuit 2043 controls switch ES1 to turn "on" and switch ES2 to turn "off". At this time, only the power VCC1 from the USB port 201 supplies power to the core circuit 2031 in the PLC system 203 so that the user can perform main functions such as programming, debugging, downloading, and the like. The other circuits 2032 in the PLC system 203 are not powered, and are not in operation.
d) 當VCC2不可用並且VCC1不可用時，電力管理電路2043控制開關ES1斷開以及開關ES2斷開。此時，PLC系統203完全不工作。d) When VCC2 is unavailable and VCC1 is not available, power management circuit 2043 controls switch ES1 to open and switch ES2 to open. At this time, the PLC system 203 does not work at all.
設計PLC中的電力管理電路2043：Design the power management circuit 2043 in the PLC:
1) 當外部電源202的電力輸入接通時，PLC系統203完全正常運行，即外部電源202為電路2031和2032正常供電。1) When the power input of the external power source 202 is turned on, the PLC system 203 is fully operational, that is, the external power source 202 supplies power to the circuits 2031 and 2032 normally.
2) 當外部電源202的電力輸入斷開，但USB(從屬)接通時，僅核心電路2031(CPU、USB通訊、485/232、乙太網、和所有或部分的LED)透過USB 201電源輸入供電，I/O以及一些通訊將斷電。2) When the power input of the external power source 202 is disconnected, but the USB (slave) is turned on, only the core circuit 2031 (CPU, USB communication, 485/232, Ethernet, and all or part of the LED) passes through the USB 201 power supply. Input power, I/O, and some communications will be powered down.
根據本發明實施例可知，本發明能夠為使用者帶來如下益處：當使用者需要下載程式，或進行一些簡單的編程和除錯時，他們不需要將電源連接到PLC系統。他們可以利用USB將PLC連接到編程/調製設備(例如PC等)，並且PLC能夠通電用於某些主要的功能，例如下載、編程、除錯等。According to an embodiment of the present invention, the present invention can provide a user with the following benefits: When a user needs to download a program, or perform some simple programming and debugging, they do not need to connect a power source to the PLC system. They can connect the PLC to a programming/modulation device (such as a PC, etc.) using USB, and the PLC can be powered for some major functions such as downloading, programming, debugging, and so on.
當外部電源接通時，所有電路通電，PLC正常工作。When the external power is turned on, all circuits are energized and the PLC works normally.
當外部電源斷開，並且USB電源接通時，PLC系統的MCU部件通電，使用者可以進行編程、除錯、下載，同時一些其他電路斷電以確保USB電源足夠為核心電路供電。When the external power supply is disconnected and the USB power is turned on, the MCU components of the PLC system are powered up, the user can program, debug, download, and some other circuits are powered down to ensure that the USB power supply is sufficient to power the core circuitry.
所有電源斷開時，系統停止。The system stops when all power is disconnected.
儘管本發明是參照其特定的優選實施例來描述的，但本領域的技術人員應該理解，在不脫離由所附申請專利範圍第限定的本發明的精神和範圍的情況下，可以對其進行形式和細節的各種修改。Although the present invention has been described with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that the present invention can be carried out without departing from the spirit and scope of the invention as defined by the appended claims. Various modifications to form and detail.
101．．．USB端口101. . . USB port
102．．．外部電源102. . . External power supply
103．．．PLC系統103. . . PLC system
201．．．USB端口201. . . USB port
202．．．外部電源202. . . External power supply
203．．．PLC系統203. . . PLC system
2031．．．核心電路2031. . . Core circuit
2032．．．其他電路2032. . . Other circuit
204．．．控制電路204. . . Control circuit
2041．．．開關ES12041. . . Switch ES1
2042．．．開關ES22042. . . Switch ES2
2043．．．電力管理電路2043. . . Power management circuit
透過結合附圖對本發明的優選實施例進行詳細描述，本發明的上述和其他目的、特性和優點將會變得更加清楚，其中相同的標號指定相同結構的單元，並且在其中：The above and other objects, features and advantages of the present invention will become more apparent from the <RTIgt
第1圖示出了現有技術的為PLC系統供電的電路圖；以及Figure 1 shows a prior art circuit diagram for powering a PLC system;
第2圖示出了根據本發明實施例的為PLC系統供電的電源控制電路圖。Figure 2 shows a power control circuit diagram for powering a PLC system in accordance with an embodiment of the present invention.
201．．．USB端口201. . . USB port
202．．．外部電源202. . . External power supply
203．．．PLC系統203. . . PLC system
2031．．．核心電路2031. . . Core circuit
2032．．．其他電路2032. . . Other circuit
204．．．控制電路204. . . Control circuit
2041．．．開關ES12041. . . Switch ES1
2042．．．開關ES22042. . . Switch ES2
2043．．．電力管理電路2043. . . Power management circuit
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110127335.6A CN102789298B (en) | 2011-05-17 | 2011-05-17 | Power control circuit and method |
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| TW201248412A TW201248412A (en) | 2012-12-01 |
| TWI602062B true TWI602062B (en) | 2017-10-11 |
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| CN1599502A (en) * | 2003-09-02 | 2005-03-23 | Lg电子株式会社 | Power supply apparatus of mobile terminal |
| TW200848999A (en) * | 2007-06-08 | 2008-12-16 | Hon Hai Prec Ind Co Ltd | Power source switching device |
| CN100549912C (en) * | 2007-11-29 | 2009-10-14 | 无敌科技(西安)有限公司 | A kind of electric power controller and method thereof that is applied in the USB device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201248412A (en) | 2012-12-01 |
| CN102789298A (en) | 2012-11-21 |
| WO2012155820A1 (en) | 2012-11-22 |
| CN102789298B (en) | 2016-03-30 |
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