JPS6141261A - Device monitor - Google Patents

Abstract

PURPOSE:To confirm the working state of each device at places excluding a posi tion of installation of the relevant device, by detecting the device working state and modulating the detection signal to a modulation signal which can be transmitted to a signal wiring to transmit it to said wiring. CONSTITUTION:A control terminal equipment 37 set within a house receives an action command signal P1 which turns on and off each control subject device from an external telephone set 39 and modulates the signal P1 into a modulation control signal P2 that can be transmitted to a power line 36 by a built-in modulator. The signal P2 is transmitted to a power supply connection part 40 of each control subject device for drive and control of these devices. The part 40 confirs the drive and stop states of the device by a built-in detector to transmit a detection signal and modulates this signal to a modulation detection signal P4 which can be transmitted to the line 36. Then the signal P4 is transmitted to the equipment 37 via the line 36. The equipment 37 demodulates the signal P4 to a demodulation detection signal P5 to supply it to a display part 41A which monitors the working state of each device and also modulates the signal P5 to an action monitor signal P6 that can be transmitted to a telephone circuit 38. Thus the telephone 39 can monitor the working state of each device.

Description

[Detailed description of the invention] [Technical field] TECHNICAL FIELD The present invention relates to a 41-meter monitor device.

[Prior Art] Drive control of various electric appliances installed in houses and various plant equipment installed in factories has recently been centrally managed using control terminals installed at the center of houses and factories. has been adopted. That is, this system enables remote operation of starting and stopping each device from a location other than the location where each device is installed by operating a switch on a control terminal. In addition, recently, these control terminals are connected to external telephone lines and can remotely start and stop each device based on operation command signals sent from external telephones outside the home or in other factories. It is possible to operate.

By the way, when using the above methods to remotely control the drive of each device from a location other than the location where each device is installed, each device is actually controlled based on switch operations on the control terminal and transmission of operation command signals from an external telephone. It is necessary to check the operating status, such as whether the drive and stop are being performed reliably.

[Object of the Invention] An object of the present invention is to reliably check the operating state of each device at a location other than the location where the device is installed.

[Summary of the Invention] In order to achieve the above object, the present invention detects the operating state of a device, modulates this detection signal into a modulated signal that can be transmitted to signal wiring by a modulator, and converts the modulated signal into a signal. The equipment monitoring device includes a circuit that transmits data to the wiring.

[Structure of the invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

First, with reference to the schematic diagram shown in FIG. 2, an outline of a telephone control device using a device monitoring device according to an embodiment of the present invention will be explained. This telephone control device 30 is
It is possible to drive and control each device to be controlled, such as an electric kettle 31, an automatic hot water supply unit 32, an air conditioner 33, and an electric shutter 34, which are installed at various positions in the house, and to monitor the operating status of each device. Each controlled device is
It can be driven by household TOOV power 1, and a power line 36 is wired between an AC power source 35 that supplies power and each device to be controlled. Telephone control device 30
The control terminal 37 is installed in the house,
The control terminal 37 is connected to a general telephone line 38. The control terminal 37 is an external telephone 3
It is possible to receive an operation command signal P1 sent from 9 to turn on or off each device to be controlled. The received operation command signal Pi is sent to the control terminal 37
The modulation control signal P2 is modulated by a built-in modulator into a modulation control signal P2 that can be transmitted to the power line 36.
can be transmitted to each controlled device via the power line 36. That is, the modulation control signal P2 is transmitted to the power supply connection section 40 of each controlled device, and the power supply connection section 40 has a built-in demodulator, and the demodulator receives the transmitted modulation control signal P2.
2 can be demodulated into a demodulated control signal P3 that enables drive control of each device to be controlled. Furthermore, the power supply connection section 40
has a built-in relay device that turns on and off the power supplied from the AC power supply 35 to the device to be controlled, and the relay device operates based on the demodulation control signal P3 input from the demodulator.
I am trying to turn the contacts on or off. As a result, for example, when an operation command signal Pi for turning on or off the electric kettle 31 is transmitted from the external telephone 39,
The signal P1 is modulated into a modulated control signal P2 and sent to the power line 36.
This makes it possible for the data to be transmitted to Further, the signal P2 is transmitted to the power supply connection section 40 of the electric pot 31 and demodulated into a demodulation control signal P3, so that the signal P3 turns on or off the relay device. As a result, power is supplied or cut off from the AC power source 35 to the electric pot 31, and the operation of the electric pot 31 can be controlled.

The control terminal 37 is also equipped with a remote control switch 41 that can transmit a modulated control signal P2 corresponding to each controlled device. 41, it is possible to control the supply or cutoff of power to each device to be controlled.

The power supply connection section 40 of each controlled device has a built-in detector for checking the operating state of each device.

That is, this detector consists of a current sensor that can detect the current flowing to each device from the AC power source 35, for example, and by detecting the current with the current sensor, it is possible to check whether each device is running or stopped. . The current sensor is capable of confirming the drive and stop states of each device and transmitting each detection signal. The power supply connection unit 40 has a built-in circuit that modulates each detection signal into a modulated detection signal P4 that can be transmitted to the power line 36. Modulation detection signal P4 is on power line 3
6 to the control terminal 37. The control terminal 37 has a built-in demodulator, and the demodulator can demodulate the transmitted modulation detection signal P4 into a demodulation detection signal P5. A display unit 41A is connected to the control terminal 37, which allows the operating status of each device to be monitored based on the demodulated detection signal P5. Furthermore, the control terminal 37 has a built-in circuit for transmitting an operation monitor signal P6, which enables the external telephone 39 to monitor the operation status of each device based on the demodulation detection signal P5. That is, the transmitting circuit can modulate the demodulated detection signal P5 into an operation monitor signal P6 that can be transmitted to the general telephone line 38, and as a result, the external telephone 39 can monitor the operation status of each device by means such as voice synthesis. It becomes possible to do so.

Next, the specific configuration of the telephone control device N30 will be explained in the first section.
The explanation will be based on the circuit diagram shown in the figure. The telephone control device 30 primarily includes a first circuit 42 . Second circuit 4
3. It is composed of three circuit parts: a third circuit 44;

The first circuit 42 and the second circuit 43 are located inside the control terminal 37 of the schematic diagram shown in FIG. They are respectively located inside the power supply connection section 40 in the schematic diagram shown in FIG.

The first circuit 42 includes a general telephone line 3 that is connected to a residence.
A changeover switch 46 is provided for connecting the telephone 8 to either a telephone subscriber 45 installed in the house or a telephone control device 30. The changeover switch 46 is configured to switch to the contact 47 on the operating side of the telephone control device 30 when, for example, the device to be controlled is to be controlled from outside the home, and in other cases, the changeover switch 46 is configured to switch to the contact 47 on the operating side of the telephone control device 30. The contact point 48 is switched to enable normal telephone conversation. The first circuit 42 is provided with an incoming call detector 49 that can detect incoming calls from an external telephone 39.The incoming call detector 49 is connected to an input control relay 50.
When an incoming call is detected, the input control relay 50 can be turned on. When the input control relay 50 is turned on, the operation command signal P1 is input to the tone signal conversion circuit 51. External telephone 39
The operation command signal PI transmitted from the button 52 of the button as an external telephone shown in FIG. 3(A)
It consists of a dual tone signal transmitted by pressing , and the dual tone signal can be carried over the general telephone line 38 by a carrier wave signal. The dual tone signal transmitted by pressing each transmit button 52 has a different frequency depending on the type of transmit button 52. The tone signal conversion circuit 51 is capable of converting the transmitted audio signals of each frequency into digital signals, and further inputs the converted digital signals to the microcomputer 53. In addition,
A station line connection transformer 54 is interposed between the input control relay 50 and the tone signal conversion circuit 51. That is, the office line connection transformer 54 blocks the carrier wave signal included in the operation command signal P1 input from the general telephone line 38, and inputs only the dual tone signal to the tone signal conversion circuit 51. It is possible. The microcomputer 53 discriminates the digital signals inputted from the tone signal conversion circuit 51 and outputs necessary response signals corresponding to each signal to the audio circuit 55. That is,
The microcomputer 53 is set with a response signal corresponding to each digital signal formed based on each dual tone signal, and the microcomputer 53
A digital switch 56 is connected to. The digital switch 56 is configured in advance to set a password code for the operation command signal P1 transmitted from the external telephone 39 and a control code for each controlled device, and the set password code or control code is sent to the microcomputer 53. I try to be remembered. The audio circuit 55 transmits a necessary voice synthesis signal to the general telephone line 38 via the office line connection transformer 54 in accordance with the response signal outputted from the microcomputer 53 based on each digital signal.

As a result, a necessary voice synthesized message is transmitted to the external telephone set 39. That is, an example of the operation of the external telephone 39 and the corresponding microcomputer 5
The operating functions of No. 3 will be explained based on FIGS. 3(B) to 3(CD). First, the subscriber telephone number where the telephone control device 30 is installed is called from the external telephone set 39. Then, the incoming call detector 49 detects the telephone control device 3.
0 is enabled, and the input control relay 50 is turned on. At the same time, a voice synthesis signal is first automatically transmitted from the voice circuit 55, and a voice synthesis message is transmitted to the external telephone 39 saying, "This is O○, please press the confirmation button."

In contrast, first, each send button 5 of the external telephone 39
2, press the confirmation button 57 as shown in FIG. 3(B). Then, the dual tone signal transmitted by pressing the confirmation button is transmitted to the general telephone line 38 and sent to the tone signal conversion circuit 51. The tone signal conversion circuit 51 converts the dual tone signal into a digital signal and outputs it to the microcomputer 53. The microcomputer 53 outputs a corresponding response signal to the audio circuit 55 based on the digital signal, and the audio circuit 55 further outputs a voice synthesized signal based on the response signal. As a result, a voice synthesized message "Please enter your password" is sent to the external telephone 39.

The PIN code is to prevent mischief by others or malfunction of the telephone control device 30, and as mentioned above, the user enters it into the microcomputer 53 using the digital switch 56 and stores it in advance. Then, if the PIN code is set in advance, for example, “3.4.5
．． 6", the send button 52 of the external telephone 39 is set to "3.4.5.6" as shown in FIG. 3(C).
” and then press the confirmation button 57. Then, the dual tone signal of the PIN code transmitted by pressing these send buttons 52 is transmitted to the general telephone line 38 and then to the tone signal conversion circuit 51. The tone signal conversion circuit 51 converts the dual tone signal of the password into a digital signal and outputs it to the microcomputer 53. The microcomputer 53 outputs a corresponding response signal to the audio circuit 55 based on the digital signal of the code, and the audio circuit 55 further outputs a voice synthesis signal based on the response signal. I have to. That is, the audio circuit 55 sends a synthesized voice message to the external telephone 39 saying, "Please give me the control code."

A control code is a code number that sets the control details for each controlled device, and is similar to a PIN code.
If the user inputs the control code to the microcomputer 53 using the digital switch 56 and the control code for turning on the electric kettle 31 is set to "1" in advance, the control code is set to "1" as shown in FIG. 3(D). Press "l" on the send button 52 of the external telephone 39, and then press the confirmation button 57.
Make sure to press . Then, the dual tone signal of the control code transmitted by pressing these transmission buttons is transmitted to the general telephone line 38 and transmitted to the tone signal conversion circuit 51.

The tone signal conversion circuit 51 converts the dual tone signal of the control code into a digital signal and outputs it to the microcomputer 53.

The microcomputer 53 transmits an operation command signal for driving the electric pot 31 to a second circuit 43, which will be described later, based on the digital signal of the control code.
The electric kettle 31 is driven and controlled.

The first circuit 42 is provided with a signal transmission device corresponding to each device to be controlled. This signal transmission device is electrically insulated and consists of, for example, a relay device. Although the relay device electrically isolates the first circuit 42 and the second circuit 43, the microcomputer 5 of the first circuit 42
The device can be turned on and off by an operation command signal transmitted from No. 3 as described above to each device to be controlled. When the relay device is turned on, the second circuit 4
It is possible to issue commands to the third side to operate the corresponding controlled equipment. In FIG. 1, among the devices to be controlled, a relay device 60 corresponding to the electric kettle 31 and a relay device 61 corresponding to the bath hot water supply unit 32 are shown, respectively. Each relay device 60 , 61 enables excitation of a coil 62 , 63 based on an operation command signal transmitted from the microcomputer 53 .

As a result, the contacts 64,65 of each relay device 60,61
It is possible to turn on each of them. An amplifier 66 is provided between the microcomputer 53 and each relay device 60, 61, so that the operation command signal transmitted from the microcomputer 53 can be amplified.

The second circuit 43 is provided with a microcomputer 67 . The microcomputer 67 is capable of receiving on/off signals of the contacts 63 of the relay device 60 or the contacts 64 of the relay device i61, and when the contacts of any relay device are turned on, each control target device is activated based on this. It is possible to transmit different drive command pulses corresponding to the modulator 68 to the modulator 68. That is, the microcomputer 67
For example, the drive command pulse A for the electric pot 31 and the drive command pulse B for the bath automatic hot water supply unit 32 can be transmitted to the modulator 68 based on the ON operation of the relay devices 60 and 61. Furthermore, the microcomputer 67 operates based on the ON operation of the relay device corresponding to each controlled device, and the 0 oscillator 69 connected to the oscillator 69 operates.
A high frequency carrier signal C can be output to the modulator 68. That is, the modulator 68 is capable of modulating the drive command pulses A and B corresponding to each controlled device transmitted by the microcomputer 67 with the high frequency carrier signal C output from the oscillator 69. As a result, the drive command pulses A and B are modulated into a modulation control signal P2 that can be transmitted to the power line 36, and the modulation control signal P2 is transmitted to the power line 36 via the amplifier 69 and the insulating capacitor 70.
transmitted to. As a result, a modulated control signal is transmitted to the third circuit 44 of the power supply connection section 40 provided for each controlled device through the power line 36 wired from the AC power source 35 to each controlled device. Note that the insulating capacitor 70 is for cutting off the input of power from the AC power supply 35 to the second circuit 43.

Furthermore, the remote control switch 41 enables drive control of each device to be controlled in the house, and by operating the remote control switch 41, it is possible to directly input operation commands for each device to be controlled to the microcomputer 67.

Third circuit 4 of power supply connection section 40 in each controlled device
4 is provided with a demodulator 72 that demodulates the modulation control signal P2 transmitted through the power line 36. That is, the demodulator 7
2 makes it possible to demodulate the modulation control signal P2 into a demodulation control signal P3 that enables drive control of the device to be gate controlled. A capacitor 73 is connected between the demodulator 72 and the power line 36.
is provided so that input of power from the power line 36 to the third circuit 44 can be interrupted. The demodulated control signal P3 demodulated by the demodulator 72 is transmitted to the signal discrimination circuit 74. The signal determination circuit 74 makes it possible to determine whether or not the demodulation control signal P3 is the demodulation control signal P3 corresponding to the device to be controlled, and when the determined signal is a signal related to the device to be controlled, , the demodulation control signal P3
is transmitted to the relay device 75. An amplifier 76 is provided between the signal discrimination circuit 74 and the relay device 75, and the amplifier 76 is capable of amplifying the demodulation control signal P3 outputted by the signal discrimination circuit 74. That is, the amplified demodulation control signal P3 is input to the relay device 75, and the coil 77 of the relay device 75 is in an energized or de-energized state. As a result, the contact 78 of the relay device 75
is turned on and off, making it possible to turn on and off the power supplied from the AC power supply 35 to each controlled device via the power line 36. That is, as shown in FIG.
A relay device 75 provided in the third circuit 44 of the power supply connection unit 40 corresponding to It is possible to control the drive of Further, the relay device provided in the third circuit 44 of the power supply connection section 40 corresponding to the automatic bath water supply unit 32 can control the drive of the automatic bath water supply unit 32 based on the corresponding demodulation control signal. .

Furthermore, a current sensor 81 that detects the current flowing from the AC power source 35 to the electric pot 31 is connected to the third circuit 44 . That is, the current sensor 81 is built into the power supply connection part 40 of the electric pot 31 shown in FIG. 2, and detects whether the electric pot 31 is being driven or stopped by detecting whether the current flowing to the electric pot 31 is on or off. That's what I do.

The current sensor 81 is capable of transmitting a detection signal based on on/off detection of the current flowing to the electric pot 31, and the detection signal is transmitted to the third circuit 44.
The detection signal transmitted to the encoder 82 is demultiplexed by a demultiplexer 82, and then transmitted to a code converter 83, where it is converted into a code signal. Further, the detection signal converted into the code signal is modulated by the modulator 84 into a modulated detection signal P4 that can be transmitted to the power line 36, and can be transmitted to the second circuit 43 via the power line 36. Note that a capacitor 85 is provided between the modulator 84 and the power line 36, so that input of power from the power line 36 to the third circuit 44 can be interrupted.

The modulated detection signal P4 transmitted to the second circuit 43 is amplified by an amplifier 86 and then transmitted to a demodulator 87, where it can be demodulated into a demodulated detection signal P5. Note that an insulating capacitor 88 is provided between the amplifier 86 of the second circuit 43 and the power line 36, so that input of power from the AC power supply 35 to the second circuit 43 can be interrupted.

The demodulated detection signal P5 is transmitted from the demodulator 87 to the microcomputer 67. The microcomputer 67 is
Based on a signal transmitted from a current sensor or the like of each controlled device, that is, a demodulated detection signal P5, processing is performed to confirm the operating state of each device, such as driving or stopping.

A display section 4LA is connected to the microcomputer 67.

Based on the above operation state confirmation process of the microcomputer 67, the operation state of each controlled device can be monitored on the display section 41A. That is, for example, if the demodulated detection signal P5 transmitted to the microcomputer 67 is a signal based on the detection of the ON state of the electric pot 31, the microcomputer 67 performs processing to determine the signal, and displays the display section 41A. A signal indicating that the electric pot 31 is in a driving state is transmitted to the electric pot 31. As a result, the display section 41A
It becomes possible to monitor the driving state of the electric pot 31.

The microcomputer 67 is configured to transmit a detection signal E corresponding to each device based on the demodulated detection signal P5 transmitted from each device to be controlled. The second circuit 43 is provided with a detection signal E transmission device corresponding to each controlled device. The transmission device for this detection signal E is electrically insulated and consists of a relay device 90, 91, for example. The relay devices 90 and 91 enable electrical isolation between the first circuit 42 and the second circuit 43, and are provided between the microcomputer 53 of the first circuit 42 and the microcomputer 67 of the second circuit 43, respectively. equipped. The relay device 90 is capable of transmitting the detection signal E from the electric pot 31,
Further, the relay device 91 is capable of transmitting the detection signal E from the bath automatic hot water supply unit 32. Relay device 90
．． 91 can be turned on and off based on the transmission of a detection signal from the microcomputer 67. That is, each relay device 90.91 excites the coil 92.93 based on the detection signal E transmitted from the microcomputer 67, and thereby the contact 94.95 of the relay device 90.91
Turn on. As a result, it becomes possible to transmit to the microcomputer 53 of the first circuit 42 the operating status of each device to be controlled, for example, the drive and stop status of the electric pot 31. Note that an amplifier 96 is interposed between the microcomputer 67 and each relay device 90, 91, so that the detection signal E transmitted from the microcomputer 67 can be amplified.

The microcomputer 53 can check the operating state of each device to be controlled based on whether the corresponding relay device 90 or 91 is turned on or off. The microcomputer 53 is
When a monitor code corresponding to each device to be controlled is received from the external telephone 39, a response signal corresponding to the operating state of each device is transmitted to the audio circuit 55. The audio circuit 55 is capable of transmitting an operation monitor signal P' 6 consisting of a voice synthesized signal to the external telephone 39 based on the response signal. Mokoyu is possible through synthetic messages.

That is, an example of the operation of the external telephone 39 and the corresponding operational functions of the microcomputer 53 will be explained based on FIGS. 4(A) and 4(B).

First, press the send button 52 of the external telephone 39 that is in a call state.
Among them, the monitor button 97 is pressed as shown in FIG. 4(A). Then, by pressing the monitor button 97, a dual tone signal is transmitted to the general telephone line 38.
The signal is then transmitted to the tone signal conversion circuit 51.

The tone signal conversion circuit 51 converts the dual tone signal into a digital signal and outputs it to the microcomputer 53. The microcomputer 53 outputs a corresponding response signal to the audio circuit 55 based on the digital signal, and the audio circuit 55 further outputs a voice synthesized signal based on the response signal. As a result, a voice synthesized message "Please give me your monitor code" is sent to the external telephone 39.

A monitor code is set for each controlled device, and the set monitor code is stored in the microcomputer 53. Monitor code i! The settings are set in advance by pressing the digital switch 5B. This results in
For example, if the monitor code for checking the driving and stopping states of the electric pot 31 is set to "Ol" in advance, the fourth
As shown in Figure (B), the send button 52 of the external telephone 39
and "Ol" in this order, and then press the monitor button 97.

Then, the dual tone signal of the monitor code transmitted by pressing these transmit buttons 52 is transmitted to the general telephone line 38 and transmitted to the tone signal conversion circuit 51. The tone signal conversion circuit 51 converts the dual tone signal of the monitor code into a digital signal and outputs it to the microcomputer 53. Based on the digital signal of the monitor code, the microcomputer 53 outputs a response signal informing the driving state of the electric pot 31 to the audio circuit 55, and the audio circuit 55 further outputs an operation monitor signal P6 based on the response signal. I am trying to output . This makes it possible, for example, to send a synthesized voice message to the external telephone 39 such as "The electric kettle is operating." It becomes possible.

As in the case of the electric pot 31 above, the bath automatic hot water supply unit 3
By installing the current sensor 98 also in 2, it becomes possible to monitor the driving state on the display section 41A and the external telephone 39, and it becomes possible to reliably grasp the driving state of each device to be controlled. Furthermore, for example, by providing a temperature sensor 99 and a hot water amount sensor 100 in the bath automatic hot water supply unit 32, it becomes possible to monitor the temperature state of the bath water or the water amount state using the display section 41A and the external telephone 39. It becomes possible to monitor the entire operating state of the controlled equipment, such as the driving and stopping states and information accompanying them, on the display section 4LA and the external telephone 39.

Next, the operation of the above embodiment will be explained.

According to the telephone control device 30, the operation command signal P1 sent from the external telephone 39 to each controlled device is
The modulator 68 enables modulation into a modulation control signal P2 that can be transmitted to the power line 36. This makes it possible to transmit the modulated control signal P2 to the power line 36 that supplies power to each device to be controlled. Further, the modulation control signal P2 is demodulated into a demodulation control signal P3 in each device to be controlled, and it becomes possible to perform drive control of each device to be controlled based on the demodulation control signal P3.

Further, a corresponding detector such as a current sensor is installed in each controlled device, and the detection signal transmitted from each detector is modulated by the modulator 84 into a modulated detection signal P5 that can be transmitted to the power line 36. be able to. Thereby, the operating state of each controlled device can be reliably transmitted to a location other than the installation location of each device, and the operating state of each device can be monitored at the location.

In the above embodiment, an example has been described in which a detection signal of the operating state of each device is modulated by a modulator into a modulated detection signal that can be transmitted to a power line. In contrast, using signal wiring such as TV feeders and optical fibers in addition to power lines,
The detection signal may be modulated into a modulated detection signal that can be transmitted to these signal wirings, and the modulated detection signal may be further demodulated to monitor the operating state of each device.

In the above-mentioned embodiment, the external telephone 39 is connected to a telephone, and the dual tone signal transmitted by pressing the transmit button 52 of the telephone is used as the operation command signal Pi. On the other hand, if the external telephone is a dial-type one, a small transmitter that can output a dual-tone signal similar to the dual-tone signal transmitted by the above-mentioned button phone is attached to the mouthpiece. An operation command signal may be transmitted to the device to be controlled.

[Effects of the Invention] As described above, the present invention detects the operating state of a device, modulates this detection signal into a modulated signal that can be transmitted to the signal wiring by a modulator, and transmits the modulated signal to the signal wiring. Since the transmitting circuit is a device monitoring device, there is an effect that the operating state of each device can be reliably checked at a location other than the location where the device is installed.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a telephone control device to which a device monitoring device according to an embodiment of the present invention is applied, FIG. 2 is a schematic diagram showing the telephone control device shown in FIG. 1, and FIG.
Figure (A) is a schematic diagram showing the send button of an external telephone;
Figures (B) to Figure 3 (D) are schematic diagrams showing the process of transmitting an operation command signal to a controlled device using the transmit button of an external telephone, and Figures 4 (A) and (B) are FIG. 2 is a schematic diagram showing a process of checking the operating state of a device to be controlled by pressing a send button on a telephone. 36...Power line, D...Detection signal, P4...Modulation detection signal. Patent applicant Mototoshi Fujinuma, Representative of Sekisui Chemical Co., Ltd.

Claims (1)

[Claims] (1) A device that has a circuit that detects the operating state of the device, modulates this detection signal into a modulated signal that can be transmitted to the signal wiring by a modulator, and transmits the modulated signal to the signal wiring. Monitor device.