JPH03166837A - Data communication device - Google Patents

Abstract

PURPOSE:To simplify the constitution and reduce the size irrelevantly to the number of equipments to be controlled and to make a proper data communication by providing a setting means for identification information on this device, a data extracting means, a retrieval means, a reception control means, etc. CONSTITUTION:A control part 1 is provided with a power source part 11 and electric power is supplied from a connection part 20 connected to a power supply network to the power source part 11 through a power line 21. Further, the identification information on this device which is set with dip switches 50 is inputted to a comparison part 12 and compared with data which is received from the power supply network through the connection part 20, a coupling part 30, a modem 40, and an S/P conversion part 41. Then when the comparison part 12 detects the same identification information in the arrival data, a central control part 13 regards a series of data containing the identification information as effective data and inputs the data. When data is transmitted, the identification information is inserted into the header and the data is sent, so its address is specified and the data can securely be sent to the device having the desired address. Consequently, even when the same devices are connected to the power supply network, control is made accurate and a proper data communication is made.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data communication device that can be applied to constructing a system for controlling audio/video equipment using a personal computer.

[Conventional technology]

As a conventional data communication device of this type, RS-232
C interface devices are known.

A system using this device is shown in FIG.

Is this system a personal computer? R to 00
S-232C interface section 101, 101■
Connect the RS-232C cable 102. 1022 interface 1 part 101 . 1012, audio equipment 103, and video equipment 104 are connected. The personal computer 100 provides control data to the audio equipment 103 and video equipment 104.

[Problem to be solved by the invention]

However, according to the conventional data communication device as described above, it is necessary to configure interface sections, cable connectors, etc. for the number of devices to be controlled, and the configuration becomes complicated and large as the number of devices to be controlled increases. There was a problem.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a data communication device that has a simple and compact configuration and can perform data communication appropriately regardless of the number of devices to be controlled.

[Means to solve the problem]

The data communication device according to the present invention includes a setting means for setting identification information of the device itself, a data extraction means connected to a power supply network and extracting data arriving from the power supply network, and a data extraction means for extracting data arriving from the power supply network. The present invention is characterized by comprising a search means for searching the identification information set by the setting means for the data set by the setting means, and a reception control means for accepting the incoming data as valid when the search means detects the identification information of the own device. do.

Further, the data communication device according to the present invention includes an input means for inputting identification information of a data destination device and data to be transmitted, and is connected to a power supply network and inputs identification information and data inputted from the input means. and transmitting means for changing the signal into a signal to be transmitted through a power supply network and transmitting the converted signal to the power supply network.

[Effect]

Since the data communication device according to the first invention is configured as described above, it is possible to distinguish whether or not the data is sent to the device itself based on the identification information set by the setting means. Even if the device is connected to a power supply network that supplies power, it can be accurately controlled by a predetermined personal computer or the like that serves as a mask.

Further, since the data communication device according to the second aspect of the present invention is configured as described above, data and this identification information are sent by inputting the destination as identification information from the input means, and the destination is specified. It becomes possible to accurately transmit data to and control a desired destination device.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A data communication device according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 3 of the accompanying drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. A control unit 1 in this figure is a main body including a processor of a personal computer, or a main body including a controller for audio and video equipment such as a television, a video deck, and a laser disc. The control unit 1 is equipped with a power supply unit 11, and power is supplied to the power supply unit 11 via a power line 21 from a connection unit 20 connected to a power supply network. The power supply unit 11 creates a required voltage based on this and supplies it to each part. Connection part 2
0 is connected to the coupling part 30. The coupling unit 30 is provided with a transformer, a filter, and the like, and functions as an extraction means for extracting data from the power coming from the power supply network, and also functions to send data to be transmitted to the power supply network side. Here, the power supply network is a network that supplies commercial power,
This is the wiring network that supplies power inside a car. Data is therefore transmitted via so-called electrical wires.

The coupling section 30 is connected to a modem 40. modem 40
is, for example, a modem that performs FSK modulation/demodulation. The data demodulated by the modem 40 is sent to the S/P converter 41,
The data is converted into parallel data and sent to the control unit 1. The data sent from the control section 1 is given to the P/S conversion section 42, where the parallel data is converted into serial data and given to the modem 40 for modulation.

The dip switch 50 constituting the setting means is, for example,
Identification information of the device is set using four-digit rO and IJ information. This disb switch 50
The identification information set by is taken into the comparison section 12, which constitutes a search means in the control section 1, and here the data sent out from the S/P conversion section 41, that is, the information that arrives via the power supply network. The data is compared and a search is performed to see if the data has the same identification information. Here, the data transmitted through the power supply network has a predetermined format, and includes, for example, a header, information, error control code, etc. between a start code (bit) and a stop code (bit).
Identification information is inserted in the header. Therefore, comparison section 1
2, for example, 4 from the predetermined bit from the start code.
The comparison is performed assuming that the bit data is identification information.

The timing of this comparison is given to the comparison unit 12 as a clock generated by the central control unit 13 from the incoming data.

The central part 13 controls each part of the control part 1, and
When the comparator 12 detects identification information in incoming data, it functions as a reception control means that takes in a series of data containing this identification information as valid. The information portion of this data is given to the decoder 14, where it is decoded and sent as a necessary control signal or as data as it is to a required circuit.

On the other hand, the data to be transmitted is inputted by an input means consisting of a keyboard (not shown) or the central control unit 13 itself, is given to the transmitting unit 15, and is sent in parallel in predetermined bits at a predetermined timing given by the central control unit 13. is output to. For example, destination identification information, commands, and data are input from the keyboard, and the central control unit 13 receives this and creates necessary error control data, etc., taking into account the data format.
The data is given to the transmitter 15 in a predetermined order. This data also includes identification information taken from the dip switch 50 indicating the source.

FIG. 2 shows an audio/video control system constructed using the data communication device configured as described above. In FIG. 2, the coupling unit 30, modem 40, and S shown in FIG.
The /P converter 41 and the P/S converter 42 are collectively shown as carrier current transceivers 200 to 2003. The connections 20 to 203 are connected to a power supply network 300. Also, the control unit 1l is a personal computer main body, and the control unit 12 is a compact disk? The control unit 13 represents a controller main body of an audio device such as a TV set, and a controller main body of a video device such as a television. 201 and 202 are CRT display devices, 203
is a keyboard human device, 204 is a mouse, 205■
, 2052 indicate speakers, respectively.

In the above system, predetermined identification information is set by operating the dip switches 50l-503, respectively. Next, the connections 20 to 203 are connected to the power supply network 300, and the system is started up.

Here, by controlling the control unit 13 consisting of a television,
A case where television monitoring is possible will be explained. From the keyboard 203 connected to the main body of the personal computer, data such as the same identification information as the dip switch 503, a command to turn on the television, and the number of the channel to be selected are input. Then, this data is sent to the central control unit 13 in the control unit 1■.
is taken in by the transmitter 15, converted into data in a predetermined format, and sent to the carrier current◆transceiver 2.
00l and is used as an FSK signal. This FSX signal reaches the connection section 20, 203 from the connection section 20 via the power supply network 300, and is transferred to the connection section 20, 203 via the power supply network 300.
It reaches the control units 1 and 13 via.

32 Therefore, the control units 1 and 13 perform operations according to the flowchart shown in FIG. Connection part 20.
The process starts by connecting 203 to the power supply network 300, and the comparison unit 12 takes in identification information from the dibswitches 50 and 503 (401). Next, the comparator 12 takes in the identification information coming from the S/'P converter 41 (4 0 2) and checks whether or not they match (4 0 3). If they do not match, the process returns to step 402 and continues. On the other hand, if they match, the data is extracted from the information part of the formatted data and analyzed by the decoder 14 (404). Next, communication begins, such as returning a response to the other party who sent the data (40
6) Continue communication. During this time, the decoder 14 analyzes the command to detect whether the communication is to be terminated (405), and when detecting the command to terminate the communication, performs termination processing such as accepting the termination of the communication (407); the process returns to step 402 again. As a result of such an operation, the identification information matches in the control unit 13; In this case, the identification information does not match, and there is no transition to the communication operation (4 0 6).

To explain the communication operation (4 0 6), the sent data includes identification information of the other party (control unit 1 in the above example), so this is used to respond (A C
A procedure (a so-called handshake procedure) of returning the data (K), waiting for the next sent data (command), and repeating the data (command) is executed under the control of the central control unit 13. Also, if an error is detected by the error control code, communication is interrupted and the data sent after a predetermined time is waited (4
0 2). Thus, half-duplex communication is performed.

The present invention is not limited to the above embodiments, and can be modified in various ways.

The communication operation may be performed by unilaterally transmitting data from the sending side without using the handshake procedure described above, or by changing the sending and receiving sides at predetermined intervals. may be applied. In addition, the power supply section 11 in the control section 1
All parts except for the above may be performed by the processor. Further, personal computers may communicate with each other, and therefore, in this case, character data and the like are transmitted in addition to commands.

〔Effect of the invention〕

As described above in detail, according to the data communication device according to the first aspect of the present invention, even if a plurality of the same devices are connected to the power supply network, the data communication device uses the identification information set by the setting means to It is possible to clearly distinguish whether the data is data or not, and appropriate data communication can be carried out under the control of a personal computer or the like that serves as a mask.

Further, according to the data communication device according to the second aspect of the present invention, the destination can be identified by manually inputting it as identification information, and even if the data is sent through the power supply network instead of the dedicated line, the destination device can be identified. Data can be clearly distinguished and accurate data communication can be performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a data communication device according to an embodiment of the present invention, FIG. 2 is a block diagram of a communication system configured using the data communication device according to an embodiment of the present invention, and FIG. FIG. 4 is a flowchart illustrating the operation of a data communication device according to an embodiment of the present invention, and is a configuration diagram of a communication system configured using a conventional data communication device. 1, 1■~13...control section, 11...power supply section, 12
... Comparison section, 13 ... Central control section, 14 ... Dehooder, 15 ... Transmission section, 20.20 - 203 ...
・Connection 1 part, 21...power line, 30...coupling part, 40・
...Modem, 41...S/P converter, 42...P/
S conversion unit, 50.50 to 503...Dip switch, {200 to 2003...Carrier◆Current◆Receiver, 300...Power supply network. System sliding 1 concavity 2 diagram

Claims (1)

[Claims] 1. Setting means for setting identification information of the own device; Extraction means connected to a power supply network and extracting data coming from the power supply network; and Regarding the data extracted by the extraction means Data characterized by comprising a search means for searching the identification information set by the setting means, and a reception control means for accepting incoming data as valid when the search means detects the identification information of the own device. Communication device. 2. An input means for inputting identification information of a data destination device and data to be sent; and an input means connected to a power supply network, and transmitting the identification information and data input from the input means through the power supply network. 1. A data communication device comprising: sending means for converting the signal into a signal and sending the converted signal to the power supply network.