KR20060017552A - Cross communication possible non-polarized 2 line multi communication system - Google Patents

Abstract

A nonpolar two-wire bidirectional communication system capable of multilateral communication is disclosed. Such as the present invention, the boiler is started, the main control unit [unit M _1] and the unit number of the terminal [S ₂ ~ S _n] body by connecting the only power supply line 2, the line to be used in a wired connection with the [unit M _1] It relates to a two-way communication system to enable two-way communication between a plurality of terminals, including. Normally, the main body [main body M ₁ ] needs a total of four power supply lines (+), (-), and Rx and Tx lines in order to enable multi-party communication while supplying power to terminals S ₂ to S _n . The present invention facilitates indoor and outdoor wiring work for the connection between the main body and the terminals by enabling power supply and multi-way bidirectional communication using only two wires, and provides convenience of wiring, resulting in multi-way bidirectional communication. It will increase the price competitiveness of the product.

Description

Cross communication possible non-polarized 2 line multi communication system.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing an example of a circuit configuration for a system for bidirectional communication in a conventional manner.

Figure 2 is a conventional communication method in which the main body and the terminal, not the terminal mutual communication is not possible.

Figure 3 is a circuit diagram of an embodiment of "non-polarity two-wire bidirectional communication system capable of multi-party communication" according to the present invention

Fig. 4 is a data waveform diagram showing each part when a main control device and a terminal [attached controller] perform two-way communication in a preferred embodiment of the present invention.

<Explanation of the code | symbol about the principal part of drawing>

M ₁ ; Circuit block of main controller

S ₂ ; Circuit block of the first terminal

S ₃ ; Circuit block of the second terminal

11; Transmit data pulse driver of main controller

12; Receive Data Ejector of Main Control

13; Driving power circuit part of main control device

14; Central control unit of main control unit

15; Input voltage conversion and bridge rectifier circuit

21; Transmit data pulse driver of terminal [loaded controller]

22; Receive Data Ejector in Terminal [Attached Controller]

23; Driving power circuit part of terminal [attached controller]

24; Central control of the terminal [controlled controller]

T ₁₁ ; Down transformer of main control

F; Hughes

D _{11 to} D ₁₅ ; First to fifth diodes of the main controller

C ₁₁ , C ₁₂ ; First and second condenser of the main controller

Z ₁₁ ; Line Load of Main Controls [Line Impedance]

R ₁₁ to R ₁₅ ; First to fifth resistors of the main control unit

Q _{11 to} Q ₁₃ ; First to third transistors of the main controller

U ₁₁ ; Control microcomputer of main controller

U ₁₂ ; Regulator of main control

Rx ₁ ; Receive data input terminal of control microcomputer of main controller

Tx ₁ ; Transmission data output terminal of control microcomputer of main controller

O ₁ ; Control output terminal of the control microcomputer of the main control unit

D ₂₀ , D ₂₁ , D ₂₂ , D ₂₃ , D ₂₈ , D ₂₉ ; First to sixth diodes of the terminal [attached controller]

C ₂₁ , C ₂₂ , C ₂₈ , C ₂₉ ; 1st to 4th condenser of terminal [attached controller]

R ₂₁ to R ₂₅ ; First to fifth resistors of terminals [attached controller]

Q _{21 to} Q ₂₃ ; First to third transistors of the terminal [attached controller]

U ₂₁ ; Control microcomputer of the first terminal [attached controller]

U ₂₂ ; Regulator of the first terminal [attached controller]

Rx ₂ ; Receive data input terminal of control microcomputer of terminal [loaded controller]

Tx ₂ ; Transmission data output terminal of control microcomputer of terminal [loaded controller]

I ₂ ; Key input terminal of terminal [attached controller]

SW ₁ ; Input key switch of terminal [attached controller]

U ₃₁ ; Control microcomputer of the second terminal

Rx ₃ ; Receive data input terminal of control microcomputer of second terminal

Tx ₃ ; Transmission data output terminal of control microcomputer of second terminal

The present invention relates to a non-polar two-wire bidirectional two-way communication system capable of multilateral communication, and is used in connection with a main control device [M ₁ ] such as a boiler. Main control device by bidirectional communication between the main control device and the terminal, and between the terminal and the terminal using only two DC power supply lines between the subordinate controllers [S ₂ ~ S _n ] installed in each room, without polarity. And to facilitate the indoor and outdoor wiring work for connecting between the terminal and the connection to improve the convenience of the connection as a result of providing an effect of increasing the price competitiveness of products requiring two-way communication. In the conventional bidirectional communication system configured as shown in FIG. 1, two lines of DC power supply line from the main controller side to the terminal side and two wires for two-way communication are required, so that a total of four wires are used to connect the main controller and the terminal. It is difficult to wire indoors and outdoors, and there are 4 terminals corresponding to both the control device and the controller. Therefore, it is difficult to connect because each wire and terminal have to be connected separately. There was also a problem that the control microcomputer is destroyed. In addition, the non-polar two-wire bidirectional communication system configured as shown in FIG. 2 was unable to communicate with each other [terminals].

Therefore, the object of the present invention devised to solve such a problem is to connect only two lines of the DC power supply line between the main control device and the terminal requiring bidirectional communication and use these two wires from the main control device side to the terminal side. The present invention provides a two-wire two-way communication system that enables a two-way communication between both sides of the terminal while supplying a DC power supply, and also enables two-way communication between terminals.

According to the present invention for achieving the above object, the feature of "non-polar two-wire bidirectional two-way communication system capable of multi-party communication" is to correspond to data on the line load while supplying DC power through the line load from the main control unit to the terminal side. Transmitting data to the terminal side in the manner of transmitting pulse current, and extracting data contained in the two wires supplied with the DC power supply from the main control device at the terminal side, and removing the two DC power supply lines from the terminal side. Transmitting data to the main control device and the other terminal side using the same, and extracting data from the terminal side on the main control device side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the "nonpolar two-wire bidirectional communication system capable of multi-way bidirectional communication" according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a diagram showing an example of a circuit configuration of a system for bidirectional communication in a conventional manner, wherein two lines of DC power supply line [(+), (-)] and two lines of data communication line [Rx, Tx], 4 lines in total are required. If the power supply lines [(+), (-)] from the main control unit [1] are incorrectly connected to the communication terminals [Rx, Tx] of the terminal [2], the control microcomputer [U ₂₁ ] Is destroyed, so special attention is required for the wiring work. In the non-polar two-wire bidirectional communication system configured as shown in FIG. 2, only the main body and the terminal can perform bidirectional communication, and the terminals do not communicate with each other. As in the embodiment of Fig. 3, in the " nonpolar 2-wire bidirectional bidirectional communication system capable of multi-party communication " according to the present invention, a power supply line 2 wire [(+), (-)] is used as a communication line, and polarity There is no malfunction or failure due to wrong wiring. The main controller [1] receives the commercial AC input [AC 110 / 220V], reduces the voltage to the transformer [T ₁₁ ], rectifies it in the bridge rectifier circuit [D ₁₁ to D ₁₄ ], and then to the smoothing capacitor [C ₁₁ ]. Smooth and obtain DC power supply [V _CC ] of about 12V _DC and make 5V constant voltage [V _DD ] with regulator [U ₁₂ ] and use it as driving power. The DC power supply [V _CC ] of about 12V is supplied to the power supply of each terminal [attached controller] through the line load [Z ₁₁ ] of the main control device. In terminal [S ₂ ], the power supplied from main controller [M ₁ ] is rectified and smoothed with diode [D ₂₀ or D ₂₁ ] and condenser [C ₂₁ ], and 5V constant voltage is made with regulator [U ₂₂ ]. Used as driving power source. The flow of current for driving a terminal is

Main controller V _CC terminal → Z ₁₁ → Main controller (+) terminal → One terminal of terminal → [D ₂₀ or D ₂₁ ] → C ₂₁ → [D ₂₂ or D ₂₃ ] → The other terminal of terminal → Main controller (- ) Terminals

Since the as supply of the terminal power source for is achieved through the line load [Z _11] When referred to the total current supplied to the plurality of terminal 30mA assuming a resistance value of the line load [Z _11] to 10Ω both-end voltage of the Z ₁₁ Becomes 0.3V. If there is more current, lower the resistance of Z ₁₁ so that the voltage at both ends is 0.3V. In addition, if Z ₁₁ is replaced with a coil, a plurality of terminals [S ₂ , S ₃ ,. . .] Can be supplied. At this time, if the voltage at both ends of Z ₁₁ is maintained at about 0.3V, the voltage between the emitter bases of the second transistor [Q ₁₂ ] of the main control device becomes less than the conduction voltage, so the second transistor [Q ₁₂ ] is maintained in the OFF state. do. At this time, the second transistor [Q ₂₂ ] of the terminal side also maintains the OFF state because the reverse voltage is applied between the emitter bases. Increasing the instantaneous current of the Z ₁₁ in this state, when the both-end voltage of the Z ₁₁ to fall more than 1.5V as the second transistors [Q _12] also the conduction time on [ON], the main control device and of the terminal The second transistor [Q ₂₂ ] also becomes conductive and turns on instantaneously [ON].

therefore

Typical Current of Terminal = 30mA

Z ₁₁ = 10Ω

R ₁₂ = 20 Ω

R ₂₂ = 20 Ω

When a data pulse is generated at the transmission data output terminal [Tx ₁ ] of the control microcomputer [U ₁₁ ] of the main control device and applied to the base of [Q ₁₁ ] of the first transistor, the first transistor [Q ₁₁ ] is a data pulse type. Is turned on [ON] and the third transistor [Q ₂₃ ] is also turned on in the form of a data pulse since the second transistor [Q ₂₂ ] is turned on in the form of a data pulse via C ₂₈ or C ₂₉ of the terminal. The data is transmitted to the received data input terminal [Rx ₂ ] of the control microcomputer [U ₂₁ ] of the terminal. At this time, the main control device of the second and third transistors [Q _12, Q _13] also on to the data pulse form of the main control unit receives data input terminal [Rx _1] In the data transfer, but the magnetic from the control microcomputer [U _11] Ignore the return of data. The terminal in the control microcomputer [U _21] Transmission data output terminal [Tx _1] generates a data pulse from a first Applying to the base of the transistor [Q _21] The first transistor [Q _21] is on a data pulse in the form of [ON And this signal is transmitted to the main control unit via D ₂₈ or D _{29 so} that the second and third transistors [Q ₁₂ , Q ₁₃ ] of the main control unit are also turned on in pulse form to receive data of the control microcom in the main control unit. Data from the terminal is transferred to the input terminal [Rx ₁ ]. Even when data is sent from the control microcomputer [U ₂₁ ] of the terminal, data is also inputted to the received data input terminal [Rx ₂ ] of the terminal, but disregarding this processing is the same as that of the control microcomb [U ₁₁ ] of the main controller. . By the same principle, this data pulse is also input to the R _X terminal [Rx ₃ -Rxn] of other terminals [S ₃ -S _n ]. The resistors [R ₁₂ , R ₂₂ ] used for the collectors of the Tx transistors [Q ₁₁ , Q ₂₁ ] of the main control unit and the terminal [subordinate controller] are Tx transistors by limiting the collector current of the transistors. Transistor]. Fig. 4 shows a data waveform diagram that appears in each section when the two-way communication is performed between the main control device and the terminal [attached controller]. (2) in Fig. 4 (1) is the main control device (1) also Tx data waveforms from the transmission data output terminal [Tx ₁ of the control microcomputer of Figure 4 is the transmission of the control microprocessor of terminal [S _2; Tx data waveform diagram from the data output terminal [Tx ₂ ], FIG. 4 (3) is a waveform diagram showing the main control device and the power supply line (+) terminal of the terminal, and FIG. 4 (4) is a second waveform diagram of the terminal. 4 is a waveform diagram showing the collector terminal of the transistor [Q ₂₂ ], and (5) of FIG. 4 is a waveform diagram showing the receiving data input terminal [Rx ₂ ] of the terminal control microcomputer. Fig waveform data shown in the collector terminal of the transistor [Q _12], FIG. 4 (7) is a waveform diagram shown in the received data input terminal [Rx _1] of the main control unit controls the microcomputer. As can be seen from the above, in the " non-polar two-wire bidirectional communication system capable of multi-party communication " according to the present invention, the main control device includes an input voltage conversion and bridge rectifier circuit section [15], a central control section [14], and a power supply terminal (+) ( -), Weighted line load [Z ₁₁ ], transmit data pulse driver [11], receive data extractor [12] and drive power circuit section [13]. (-), The central control unit [24], the transmission data pulse driver [21], the reception data extractor [22] and the drive power circuit unit [23], and then the main control unit [M ₁ ] and the terminal [ The wiring of the connected controller] [S ₂ ~ S _n ] is composed by connecting only the power supply line 2 [(+), (-)] wires without polarity separation, so that the wiring is simple and prevents malfunction and component damage due to incorrect wiring. It works.

As described above, in the " nonpolar 2-wire bidirectional bidirectional communication system capable of multilateral communication " according to the present invention, a main control device [M ₁ ] and a terminal [subordinate controllers] [S ₂ to S _n ] which require bidirectional communication are connected to a power supply line ( +) Since only two wires are connected without polarity separation, indoor and outdoor wiring for connecting the control device and the terminal is simple, and it is effective to solve problems such as malfunction or parts damage due to incorrect wiring of the terminal and wiring. This will increase the value of products requiring multi-way two-way communication.

Although the above has been illustrated and described with respect to the preferred embodiment of the present invention, the present invention is not limited to the above-described embodiment, it can be variously changed without departing from the gist of the invention claimed in the claims of the present invention, Such changes will fall within the scope of the claims.

Claims (4)

The main controller is An input voltage conversion and bridge rectifier circuit unit for supplying a DC power source for driving the system; (+) And (-) terminals for supplying DC power to the terminal [attached controller]; A central control unit [control micom [14]] for transmitting and receiving data to and from the terminal, and synthesizing the results to control elements and devices controlled by the main control device; A line load [Z ₁₁ ] connected to the bridge rectifier circuit part and a power supply (+) terminal to provide a current path to the terminal while superimposing a transmission / reception data waveform on a power supply line; A data pulse driver [11] connected to the line load and the transmission data output terminal [Tx ₁ ] of the central control unit of the main control device to superimpose a transmission data waveform on the power supply line; It is connected to the line load and the reception data input terminal [Rx ₁ ] of the central control unit of the main control device to extract data from the data waveform superimposed on the power supply line and apply the data to the reception data input terminal [Rx ₁ ] of the central control unit. Data extractor [12] and; It is composed of a driving power supply circuit for supplying power to each part of the main control device, Terminal [attached controller] [S ₂ ~ S _n ], (+,-), (-, +) Two terminals for introducing a DC power supply from the main control device; A central control unit [control micom] [U ₂₁ , U _31, ...] of the terminals [S ₁ to S _n ] for transmitting and receiving data with the main control unit; Terminal data pulse driver connected to the (+,-) terminal for inputting the power and the transmission data output terminal [Tx ₂ ] of the terminal central control unit to superimpose the terminal transmission data waveform on the power input (+,-) line. controller Data Pulse Driver] [21,31, ...] and; Connected to the power input (+) terminal and the reception data input terminal [Rx ₂ ] of the terminal central control unit to extract data from a data waveform superimposed on the power input (+) line to receive the data input terminal [Rx] of the terminal central control unit; Terminal data extractors [22, 32, ...] to ₂ ]; It is composed of a driving power supply circuit unit for supplying power to each part of the terminal, the main control device and a plurality of terminals [controlled controller] [S ₂ ~ S _n ] by the DC power supply line (+), (-) only two lines A two-wire two-way communication system characterized by multi-way bidirectional communication. The data extractor [12] of the main controller [M ₁ ] according to claim 1, characterized in that it is composed of D ₁₅ , Q ₁₂ , R ₁₄ , Q ₁₃ , R ₁₅ . The data extractor [22, 32, ...] of the terminal [S ₂ , S ₃ , ...] is composed of C ₂₈ , C ₂₉ , D ₂₈ , D ₂₉ , D ₂₀ , D ₂₁ , Characterized by consisting of C ₂₁ , R ₂₃ , Q ₂₂ , R ₂₄ , Q ₂₃ , R ₂₅ The data driver [21, 31, ...] of the terminal [S ₂ , S ₃ , ...] is composed of C ₂₈ , C ₂₉ , D ₂₈ , D ₂₉ , R ₂₂ , Q ₂₁ , R Characterized by consisting of ₂₁

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