JPH06291699A - Communication connection device - Google Patents

Abstract

PURPOSE:To make the handling easy, to obtain degrees of freedom of a data transmission range and the arrangement of the device, and to decrease the device scale and perform data transmission. CONSTITUTION:The AC cables between AC outlets which are arranged at a distance is used as a data transmission line. A plug terminal 4 is connected to the AC outlet and the AC plug of a data processor is connected to the AC outlet 6. Further, the cable plug from the interface part of the data processor is connected to a flat type connector 8. Processing for data transmission and reception which use the AC cable as a data transmission line is performed through a transformer 10, an FSK linear modem 12, a control part 14, an address number digital switch 16, a switch 18 dedicated to reception, and a communication interface part 20 as the data transmission and reception processing part in the communication connection device 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication connection device for use in data transmission between a host computer and a data terminal and for using an AC line in a building as a data transmission path.

[0002]

2. Description of the Related Art Conventionally, when data is transmitted between a computer and a data terminal, wired or wireless communication is used. In wired transmission, a communication cable is used for the transmission path. Further, in wireless transmission, a wireless transmission / reception apparatus is used that transmits a carrier wave modulated by data, for example, a radio wave in which phase angle modulation (PSK) or frequency shift keying (FSK) is performed, and receives and demodulates.

[0003]

As described above, in the conventional example, the communication cable is used as a transmission line for wired transmission, but in this case, data transmission is possible only within the range of the communication cable length, and the device is used. Is not easy to move. Further, the number of communication cables between the devices is large, which is troublesome to handle and the freedom of arrangement of the devices cannot be obtained. In addition, wireless transmission requires a dedicated transmission / reception device, which increases the size of the device.

The present invention solves the above-mentioned drawbacks of the prior art, is easy to handle, has a degree of freedom in the data transmission range and the arrangement of the devices, and reduces the size of the device to reduce the data size. An object is to provide a communication connection device capable of transmission.

[0005]

In order to achieve this object, the communication connection device of the present invention is connected to an AC input terminal portion mounted on an AC outlet to which an AC line is connected, and the AC input terminal portion. At the same time, an AC output terminal section for supplying AC to the data transmission apparatus, a data input / output connector to which a plug from the interface section of the data processing apparatus is connected, an AC input terminal section and an AC output terminal section, and data input / output connection. It is provided between the connector and the AC line to perform data transmission.

In this structure, the data transmission / reception processing unit is connected to the AC input terminal unit and transmits the data to the AC during the transmission.
A transformer that superimposes on a line or extracts data from an AC line when receiving, and an F that modulates or demodulates transmitted / received data
For an address number that controls the SK linear modem and the FSK linear modem, controls the transmission and reception of data signals, and is connected to the controller and sets two of the device number, a self-address and a destination device number. Digital switch,
It is configured to have a reception-only switch for setting reception-only and a communication interface unit.

[0007]

In the communication connecting device of the present invention having the above-mentioned structure, the AC cable between the AC outlets arranged apart from each other is used as a data transmission path. The AC input terminal portion is attached to the AC outlet and the AC output terminal is attached. An AC plug from the data processing device is connected to the section. Furthermore, a cable plug from the interface unit of the data processing device is connected to the data input / output connector, and the data transmission / reception processing unit in this device performs data transmission / reception processing when the AC cable is used as a data transmission path. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the communication connection device of the present invention will be described in detail with reference to the drawings. 1 is a block diagram showing the configuration of an embodiment of the communication connection device of the present invention.
[Fig. 2] is a perspective view showing an external configuration of the communication connection device shown in Fig. 1. 1 and 2, this communication connection device 2
Is a Pukugu terminal 4 for inserting into an AC100V outlet in a building fixed to the exterior body in FIG. 2, an AC outlet 6 connected in parallel with the Pukugu terminal 4, and a data input / output terminal as described below. , RS-232C, for example
It has a DUSC 25-pin flat connector 8 for.

Further, in this device, for example, AC10
2 of Pukuguk terminal 4 and AC outlet 6 to which 0V is supplied
The terminal is installed. In addition, a transformer 10 connected to the plug terminal 4 for superimposing data on AC100V during transmission or extracting data from AC100V during reception,
FSK linear modem 1 for modulating or demodulating transmitted / received data
2 and a control unit 14 that controls the FSK linear modem 12 and controls transmission and reception of data (signal).

The control unit 14 includes an address number digital switch (SW) 16 for setting two devices, that is, a self-address which is a device number and a destination device number, and a reception-only digital switch (SW), that is, a self-device from a plurality of devices. Receive-only switch (S
W) 18 is connected. In addition, this device
For example, a communication interface (I / F) unit 20 that processes a communication interface such as RS-232C, RS-422, and Centronics, generates control signals for various interfaces, and outputs the control signals is provided.

Next, the operation of the configuration of this embodiment will be described. In FIG. 1 and FIG. 2, the battery terminal 4 is A
The AC plug of the data transmission device (not shown) is connected to the AC outlet, and further to the AC outlet 6.
Further, the flat connector 8 is connected to the data input / output plug of the data transmission device. In the FSK linear modem 12 and the transformer 10, the data (signal) from the control unit 14 is AC
Superimpose on 100V line. Alternatively, the data signal superimposed on the AC100V line is demodulated and sent to the control unit 14.

The control unit 14 controls the FSK linear modem 12 to control transmission / reception of data (signal). Control unit 1
In the reception control in 4, in response to the transmission request at the start of communication, an acknowledge (ACK) is transmitted when the address matches the self address, and ACK when the transmission ends and NACK when the address does not match the self address. Furthermore, the control unit 14
Is an address number digital switch (SW) 16 in the data (signal) passed from the FSK linear modem 12.
The data (signal) that matches the preset address is selected by and the data signal is passed to the communication interface unit (I / F) 20.

In the case of transmission, the control unit 14 makes a transmission request at the start of communication when the communication interface unit 20 makes a transmission request, and at the same time transmits the transmission completion after the data transfer is completed. The control unit 14 also adds an address preset by the address number digital switch (SW) 16 to the data (signal) sent from the communication interface unit 20 as head data and passes it to the FSK linear modem 12. . Furthermore, line data, that is, A
Communication interface 2 depending on the state of the C100V line
Send status signal to 0.

The communication interface section 20 generates various interface control signals from the status signals of the control section 14 and outputs them. For example, TX in the case of RS-232C
D, RSD, RTS, CTS, DTR, DTE, GND
Etc.

Next, a data transmission system using the communication connection device operating in this way will be described. Figure 3
It is a block diagram of a data transmission system using a communication connection device. In FIG. 3, this system has AC outlets 2 which are arranged at distant positions and connected by an AC cable m.
2, 24, the communication connection device 26 shown in FIGS. 1 and 2 attached to the AC outlet 22, and the communication connection device 28 shown in FIGS. 1 and 2 attached to the AC outlet 24. There is.

Further, a computer 30 which is installed on the side of the AC outlet 22 and transmits or receives data is provided. The computer 30 has AC100V
An AC outlet 30a for supplying the communication connection device 26 from the communication connection device 26, and a cable connector 30b connected to the flat connector 8 in the communication connection device 26 shown in FIGS.

In this system, a computer 32 provided on the side of the AC outlet 24 for transmitting or receiving data, and an LCD display device 3 provided on the side of the AC outlet 24 for displaying the data from the computer 30.
4 and a printer 36 for printing and outputting the data from the computer 30. The computer 32 is provided with an AC outlet 32a for supplying AC100V from the communication connection device 28, and a cable connector 32b connected to the flat connector 8 in the communication connection device 26 shown in FIGS. .

The LCD display device 34 has an AC10
1 and 2 in the AC connection 34a for supplying 0V from the communication connection device 28 and the communication connection device 26.
Cable connector 34 to be connected to the flat connector 8 inside
b and are provided. Further, the printer 36 is
AC for supplying C100V from the communication connection device 28
An outlet 36a and a cable connector 36b connected to the flat connector 8 in FIGS. 1 and 2 in the communication connection device 26 are provided. In addition, AC outlet 2
Although one communication connection device 28 is illustrated on the side of FIG. 4, it is provided separately for each of the computer 32, the LCD display device 34, and the printer 36.

Next, the transmission / reception operation of this system will be described. In FIG. 3, when the computer 30 performs transmission / reception, all the communication connection devices 26 and 28 are always in a receiving state, and only during transmission, the AC cable m is checked to see if data is transmitted, and a transmission request (token) is issued. Send. Since the destination address is added to the transmission request, the computer 30 receives the plurality of received communication connection devices 28.
The selected communication connection device 28 among them sends a reception OK (ACK) to the computer 30 which is the transmission request source, and sends it one-to-one.
To establish a communication line.

The computer 30 includes a computer 32 and an LCD display device 3 which have established a communication line during data transfer.
4, data is transmitted to one of the printers 36. That is, ACK and NACK are not exchanged.
Next, when the data transmission is completed and the data interval becomes longer than a preset time, a communication completion signal is transmitted, (ACK) is received from the other party, and the state returns to the reception state.

In this system, when transmission requests are simultaneously generated, the system waits for the address X constant, monitors the state of the AC line, and again when no communication line is established on the AC line, Send a data transmission request. When the communication line is established, the communication completion ACK is monitored and a transmission request is transmitted.

For the operation of establishing a one-to-one communication line as described above, in the case of using one-to-N, the communication connection device 2
One of the eight is used for normal transmission / reception, and the "N-1" communication connection device 28 is used only for reception.

In this system, the completion of transmission is sent and NA is sent.
When CK is returned, data is transmitted again from the beginning. If there is no ACK or NACK after a certain period of time with respect to the transmission request and the completion of communication, it is retransmitted, and if the line is not established within the specified number of times, the line failure processing is performed.

In this system, by appropriately selecting the frequency band, the baud rate, etc., it becomes possible to perform the transmission in the optimum state, that is, the high S / N ratio with less noise, and the error rate can be reduced.

[0025]

As is apparent from the above description, the communication connection device of the present invention uses the AC cable between the separated AC outlets as the data transmission path, and the data transmission / reception processing unit in the device uses the AC cable as the data transmission line. Since it is designed to process data transmission and reception when used as a transmission path,
In addition to being easy to handle, the flexibility of the data transmission range and the arrangement of the devices can be obtained, and further, the device scale can be reduced and the data can be transmitted.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a communication connection device of the present invention.

FIG. 2 is a perspective view showing an external configuration of the communication connection device shown in FIG.

FIG. 3 is a configuration diagram showing a data transmission system using the communication connection device shown in FIGS. 1 and 2.

[Explanation of symbols]

 2 communication connection device 4 Pukugu terminal 6 AC outlet 8 flat connector 10 transformer 12 FSK linear modem 14 control unit 16 address number digital switch 18 reception dedicated switch 20 communication interface unit 22, 24 AC outlet 30, 32 computer 34 LCD display device 36 Printer

Claims (2)

[Claims] 1. An AC input terminal portion to be attached to an AC outlet to which an AC line is connected, and an AC input terminal portion connected to the AC input terminal portion and supplying AC to a data transmission device.
A C output terminal section and a data input / output connector to which a plug from the interface section of the data processing device is connected,
A communication connection device comprising: a data transmission / reception processing unit, which is provided between the AC input terminal unit and the AC output terminal unit and a data input / output connection connector, and which performs data transmission through the AC line. 2. A data transmission / reception processing unit, which is connected to an AC input terminal unit, superimposes data on an AC line at the time of transmission, or extracts data from the AC line at the time of reception,
An FSK linear modem that modulates or demodulates transmitted / received data, a control unit that controls the FSK linear modem and controls transmission / reception of a data signal, and a self address and a destination device number that are device numbers connected to the control unit. 2. The communication connection device according to claim 1, further comprising an address number digital switch for setting two of the above, a reception only switch for setting reception only, and a communication interface unit.