JPH06237309A - Cd signal monitor system for simple automatic power supply controller - Google Patents

Abstract

PURPOSE:To prevent power from being applied in mistake when a CD signal is lost due to a fault of a MODEM or disconnection of a cable. CONSTITUTION:When power is applied to a controller whose power is controlled by a communication host device connecting to a MODEM 1 via a line, a carrier (CD) signal is reset. A CD signal monitor section 2a of an automatic power controller 2 monitors a CD signal and a data set ready (DR) signal and when the DR signal is set and the CD signal is set from the reset state, a power application signal is outputted to the controller whose power is controlled to apply power to the controller. When the CD signal is reset and the DR signal is set, since the power is applied to the controller 3, power is not applied in mistake. Moreover, when the off-time of the CD signal is monitored and the off-time of the CD signal is within a prescribed time, a power application signal is outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple automatic power supply control device for turning on a controlled power supply device such as an information processing device from a communication host device via a line, and more particularly, the present invention relates to a carrier from a modem device. The present invention relates to a CD monitoring system of a simplified automatic power supply control device that turns on the power of a controlled device by monitoring the on / off state of a signal (hereinafter referred to as a CD).

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing a structure of an automatic power supply control device which is a premise of the present invention. In FIG. The modem device 11 is connected to a communication host device (not shown) via a line 11a. Reference numeral 12 denotes a communication unit that controls communication, and 13
Is a control unit for controlling power-on of the power-supplied control device, 14
Is a power-on unit that turns on the power of the power-supplied control device, and 15 is a power-supplied processing device such as an information processing device.

In the figure, when a carrier is input from the communication host device, the modem device 11 inputs a CD signal to the control unit 13 via the communication unit 12. Here, since the communication host device turns on the power of the power-supplied control device 15,
When the car is turned off, the CD given to the controller 13
The signal turns off. The control unit 13 monitors the CD signal, and when the CD signal is turned off, the control unit 13 gives a power-on instruction to the power-on unit 14 as a power-on instruction from the communication host device. The power-on unit 14 turns on the power-supplied controlled device 15 in response to a power-on instruction from the control unit 13.

[0004]

By the way, in the above-described conventional automatic power supply control system, only the CD signal is monitored as the power-on instruction signal. Therefore, for example, even when the CD signal is cut off due to a failure of the modem device 11 or the like, or the cable between the modem device 11 and the control unit 13 is disconnected, the control unit 13 is also stopped. Has turned on the power-supplied controlled device 15 as the power-on instruction from the communication host device.

The present invention has been made to solve the above-mentioned problems of the prior art. When the CD signal is interrupted due to a failure of the modem device or a cable drop, the power is mistakenly turned on. It is an object of the present invention to provide a CD monitoring method for a simple automatic power supply control device that does not occur.

[0006]

FIG. 1 shows the principle of the present invention. In the figure, 1 is a modem device connected to a communication host device (not shown) via a line, 2 is an automatic power source control device for controlling power-on of a power source controlled device 3, 2a is CD signal monitoring means, and 3 is It is a controlled device.

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention, as shown in FIG. 1, determines the power-on of the power-supplied control device by turning on / off the carrier signal from the modem device, In a simple automatic power supply control device for turning on the power of the power-supplied control device, a carrier signal as well as on / off of a data set ready signal (hereinafter referred to as a DR signal) are monitored and a power-on command of the power supply control device is issued. A CD signal monitoring means for outputting is provided, and the CD signal monitoring means is D
The power-on signal of the controlled device is output only when the R signal is on and the carrier signal is off.

According to a second aspect of the present invention, a simplified automatic power source control for turning on the power source of the power source control device by determining whether the power source of the power source control device is turned on or off by turning on / off the carrier signal from the modem device. The apparatus is provided with a CD signal monitoring means for monitoring the off time of the carrier signal and outputting a power-on command of the power controlled apparatus, and the CD signal monitoring means controls the controlled signal only when the off time of the carrier signal is within a predetermined time. The power-on signal of the device is output.

[0009]

In the first aspect of the present invention, the CD signal monitoring means 2a of the automatic power supply controller 2 monitors the CD signal and the DR signal, and when the DR signal is in the ON state and the CD signal is in the OFF state. In addition, when the CD signal is turned on from off, a power-on signal is output to the power-on unit 3.

When the CD signal is turned off because the communication host device connected to the modem device 1 through the line turns on the power supply control device 3, the CD signal monitoring unit 2a outputs D
When the R signal is in the ON state and the CD signal changes from OFF to ON, a power-on signal is output to the power-source controlled device 15 to turn on the power. In the invention of claim 1 of the present invention, when the CD signal is off and the DR signal is on, the power supply control device 3 is turned on. Therefore, for example, a line error, a failure of the modem device 1, Alternatively, when the DR signal is turned off along with the CD signal, such as when the cable is pulled out, the power is not turned on and the power is not turned on erroneously.

In the second aspect of the present invention, the CD signal monitoring section 2a monitors the off time of the CD signal, and C
When the off time of the D signal is within the predetermined time T, the power-on signal is output. Since the communication host device connected to the modem device 1 via the line turns on the power supply to the power-supplied control device 3, if the CD signal is turned off for a time shorter than a predetermined time, the CD signal monitoring unit 2a outputs the power-on signal. The power is supplied to the power-supplied controller 3, and the power is turned on.

In the second aspect of the present invention, the CD
Since the power-on signal is not output when the signal is turned off for a predetermined time or more, the power is mistakenly turned on when the line is abnormal, the modem device is faulty, or the cable is disconnected, as in the invention of claim 1. There is no.

[0013]

FIG. 2 is a diagram showing a first embodiment of the present invention, which shows the automatic power supply control device 10 enclosed by the dotted line in FIG. 6 described above, and the other constitution is shown in FIG. Is the same as. In the figure, 12 is a communication unit for controlling communication, and 13
Is a control unit for controlling power-on of the power-supplied controller 15, 1
Reference numeral 3a denotes a CD signal monitoring unit that monitors a CD signal or the like and outputs a power-on instruction to the power-supplied control device 15, reference numeral 14 denotes a power-on unit that powers on the power-supply control device 15, and reference numeral 15 denotes a power-supply control device. .

The CD is the above-mentioned carrier signal, DR
Is a data set that turns on when there is a carrier signal
The ready signal and ER are equipment ready signals that are output when the power supply control device or the like is in a ready state. FIG. 3 is a diagram showing the operation of the embodiment shown in FIG. 2, and the operation of this embodiment will be described with reference to FIG.

When the power-supplied controller 15 becomes ready, the communication controller 12 outputs an ER signal, and a communication host device (not shown) outputs a CD signal and a DR signal. C
The D signal and the DR signal are received by the modem device and given to the CD signal monitoring unit 13a of the control unit 13 via the communication unit 12. Further, the CD signal monitoring unit 13a of the control unit 13 becomes operable by the ER signal.

The CD signal monitoring unit 13a monitors the CD signal and the DR signal. When the DR signal is in the ON state and the CD signal is off, when the CD signal is turned on, the power is turned on. The signal is output to the power-on unit 14. Therefore, as shown in FIG. 3, since the communication host device turns on the power supply control device 15, when the CD signal is turned off, when the CD signal is turned from off to on, the CD signal monitoring unit 13a supplies power. The power-on signal is output to the power-on unit 14. The power-on unit 14 turns on the power of the power-supplied control device 15 in response to the power-on signal from the CD signal monitoring unit 13a.

In this embodiment, the CD signal is off,
When the DR signal is on, the power supply control device 15 is turned on. Therefore, when the DR signal is turned off together with the CD signal, for example, when the modem device fails or the cable is disconnected. Is not turned on,
The power will not be turned on incorrectly. FIG. 4 is a diagram showing a second embodiment of the present invention, which is similar to the embodiment of FIG. 3 and shows the automatic power supply control device 10 surrounded by the dotted line in FIG. 6 described above. The configuration is the same as in FIG.

In this embodiment, the controller 13 is provided with a timer C.
The D signal monitoring unit 13b is provided, and other configurations are the same as those of the first embodiment shown in FIG. 3, and the same components are designated by the same reference numerals. FIG. 5 is the second shown in FIG.
FIG. 6 is a diagram showing the operation of this embodiment, and the operation of this embodiment will be described with reference to FIG.

When the power-supplied controller 15 is in the ready state, the communication controller 12 outputs an ER signal, and a communication host device (not shown) outputs a CD signal and a DR signal.
The signal and the DR signal are received by the modem device and given to the CD signal monitoring unit 13a of the control unit 13 via the communication unit 12.
Also, the CD signal monitoring unit 13 of the control unit 13 is controlled by the ER signal.
b is in an operable state.

The CD signal monitoring unit 13b equipped with a timer is C
The off time of the D signal is monitored, and when the off time of the CD signal is within the predetermined time T, the power-on signal is output. Therefore, as shown in FIG. 5, the power-on signal is not output when the CD signal is off for a predetermined time T or more due to a failure of the modem device, a cable disconnection, or the like. Then, since the communication host device turns on the power of the power-supplied control device 15, when the CD signal is turned off for a time shorter than the predetermined time T, the CD signal monitoring unit 13b equipped with the timer sends the power-on signal to the power-on unit 14. Output to. When the CD signal monitoring unit 13a outputs a power-on signal, the power-on unit 14 turns on the power-supplied controller 15.

As described above, in this embodiment, the CD
When the signal is turned off for a predetermined time or longer, the power-on signal is not output. Therefore, as in the first embodiment, the power is not erroneously turned on when the modem device has a fault or the cable is disconnected.

[0022]

As described above, according to the present invention, in the CD signal monitoring means of the simplified automatic power supply controller, when the DR signal is in the ON state and the CD signal is OFF, or when the CD signal is OFF. Since the power-on signal is output when the time is within the predetermined time, it is possible to prevent an erroneous power-on instruction of the controlled device when a line error, a failure of the modem device, or a cable disconnection occurs. It is possible to prevent power consumption due to system malfunction and incorrect input.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a diagram showing a first embodiment of the present invention.

FIG. 3 is a diagram illustrating the operation of the first exemplary embodiment of the present invention.

FIG. 4 is a diagram showing a second embodiment of the present invention.

FIG. 5 is a diagram illustrating the operation of the second exemplary embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of an automatic power supply control device which is a premise of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 modem device 2 and 10 power supply automatic control device 2a CD signal monitoring means 3 and 15 power supply control device 12 communication unit 13 control unit 13a CD signal monitoring unit 14 power supply unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Kaneko 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Masahiro Ueno 1015, Kamedotachu, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited

Claims (2)

[Claims] 1. A carrier signal from a modem device is turned on / off.
A simple automatic power supply control device that turns on the power of the power supply control device by turning it off to turn on the power supply control device, monitors the on / off status of the data set ready signal along with the carrier signal CD signal monitoring means for outputting a power-on command for the control device is provided, and the CD signal monitoring means outputs the power-on signal for the controlled device only when the data set ready signal is on and the carrier signal is off. CD monitoring method for simple automatic power supply control device. 2. A carrier signal from a modem device is turned on / off.
A simple automatic power supply control device that turns on the power to the power supply control device by turning it off and turns on the power supply to the power supply control device monitors the off time of the carrier signal and outputs a power-on command to the power supply control device. CD signal monitoring means is provided, and the CD signal monitoring means outputs a power-on signal of the controlled device only when the off time of the carrier signal is within a predetermined time. method.