JPH05119875A - Electronic computer system - Google Patents

Abstract

PURPOSE:To prevent the power from being turned OFF by erroneously depressing the power OFF switch of a remote device by controlling the validity and invalidity of the power OFF switch of the remote device from a main device. CONSTITUTION:A power OFF control signal (b) sent from the main device 1 is received by a remote device 2, analyzed, and when the switch 9 of the remote device is depressed at the time of an OFF switch invalidating instruction, the power is not turned OFF. and at the time of an OFF switch validating instruction, the switch 9 of the remote device is depressed, the power is turned OFF, and at the time of the power turn-OFF instruction, the power of the remote device is turned OFF.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic computer system, and more particularly to controlling the power-off of a remote device such as a file server connected by a network from a main device such as a host computer by a command sent from the main device. This is related to the power-off control performed.

[0002]

2. Description of the Related Art Conventionally, a technology for controlling the power-off of a remote device, which has a power source and a power switch different from the main device body, for performing data communication with the main device via the network, from the main device via the network To send a power-off instruction signal to the remote device to cause the remote device to turn off the power.-If the remote device is processing, issue a power-off instruction signal after confirming that the processing is complete. There has been a method in which a remote unit sends a power-off completion signal to the main unit, and the main unit confirms that the power has been reliably cut off.

[0003]

However, in spite of the fact that the main unit can control the power-off of the remote unit in this manner, since the remote unit has a power-off switch, the main unit power-off instruction signal is sent. It was possible to turn off the power on the remote device side independently of the. Since the remote device is usually more than tens of meters away from the main device, it cannot be prohibited to inadvertently press the power off switch of the remote device. Therefore, if the main unit is using the resources of the remote device and the power is turned off by the power switch of the remote device, the resources used by the main device in the remote device will be destroyed, causing serious damage to the computer system. There was a problem affecting.

The present invention has been made to solve the above-mentioned problems, and while the main device is using the remote device,
It is intended to control the remote device from the main device side so that the power of the remote device is not cut off even if the power off switch is pushed on the remote device side.

[0005]

In order to achieve this object, the computer system of the present invention is provided in a main unit,
When the power switch of the remote device is turned off, command means for instructing the remote device a power-off control signal indicating whether or not to make the off operation valid, and the power-off control signal provided in the remote device. Is a command to invalidate the power-off operation of the remote device, the power-off operation is invalidated, and if the power-off control signal is a command to validate the power-off operation of the remote device, the power-off operation is valid. And a control means for controlling.

[0006]

In the present invention having the above construction, the command means of the main unit commands the remote unit to supply a power-off control signal indicating whether or not the OFF operation of the power switch of the remote unit is valid. When the power-off control signal is instructed, the control means of the remote device receives and analyzes the signal, and if the signal commands the disabling of the power-off operation of the remote device, the power switch of the remote device is turned off. Disable the power off operation and enable the power off operation if the signal directs the power off operation of the remote device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The computer system of this embodiment comprises a main unit 1, a remote unit 2 and a communication path 3. Then, the remote device 2 uses the transmission / reception circuit 4, the control circuit 5, the relay drive circuit 6, the power supply circuit 7, the momentary normally-off switch 8 (switch 8), the momentary normally-on switch 9 (switch 9), and the relay drive circuit 6. ON switch 10 controlled, relay drive circuit 6
It is composed of an off switch 11 controlled by. Furthermore, the main device 1 includes an input circuit 12 and a control circuit 1.
3. The transmitter / receiver circuit 14 is included.

The main unit 1 has a remote unit 2 through a communication path 3.
Since it is troublesome to turn off the power by the switch 9 of the remote device 2 when using the, the invalid command of the power off switch of the remote device is input to the main device 1 from the keyboard or the like as the power off control information a. can do. When the main device 1 is not using the remote device 2, the remote device 2
Since the power may be turned off by the switch 9 of the above, it is possible to input the valid command of the power-off switch of the remote device to the main device 1 as the power-off control information a. Further, when it is desired to disconnect the power supply of the remote device 2 from the main device 1, a power supply disconnection command can be input as the power supply off control information a.

The power-off control information a is input by the input circuit 12 of the main unit 1, converted into a power-off control signal b by the control circuit 13, and transmitted / received by the transmission / reception circuit 14 to the communication path 3
Sent to. The transmission / reception circuit 4 of the remote device 2 receives the power-off control signal b from the main device 1 via the communication path 3. The control circuit 5 analyzes the signal received by the transmission / reception circuit 4 and controls the relay drive circuit 6 in order to enable / disable the power off switch and execute power off. The relay drive circuit 6 controls the ON switch 10 and the OFF switch 11 according to the control signal from the control circuit 5.

The operation of this power-off control system will be described below with reference to the flowchart of FIG.

First, in step S1, the remote device 2
When the switch 8 is pressed, the remote device 2 is powered on in step S2, and the relay drive circuit 6 turns on the switch 10. Since the ON switch 10 and the switch 8 controlled by the relay drive circuit 6 are connected in parallel, the power supply is not cut off even if the switch 8 is separated here. In step S3, the remote device 2 has the power-off control signal b.
Will be waiting for reception. When the transmission / reception circuit 4 receives the power-off control signal b, step S3 proceeds to step S4, and in step S4, the process proceeds to steps S5, S6, and S7 which differ depending on the type of the power-off control signal b.

If the power-off control signal b is a command to invalidate the power-off switch of the remote device 2, the relay drive circuit 6 turns on the switch 11 in step S5.
In this state, the off switch 11 and the switch 9 controlled by the relay drive circuit are connected in parallel and the power supply circuit 7
Since it is input to, it becomes impossible to turn off the power by pressing the switch 9.

If the power-off control signal b is a command to activate the power-off switch of the remote device 2, the relay drive circuit 6 turns off the switch 11 in step S6.
In this state, the OFF switch 11 and the switch 9 controlled by the relay drive circuit are broken in parallel, and only the power passing through the switch 9 is input to the power supply circuit 7. Therefore, the switch 9 can be pressed to turn off the power.

If the power-off control signal b is a command to turn off the power of the remote unit 2, the relay drive circuit 6 turns off the switch 10 in step S7. In this state, both the ON switch 10 and the switch 8 controlled by the relay drive circuit are cut off from the input of the power supply circuit 7, so that the power supply of the remote device 2 is cut off.

[0016]

As is apparent from the above description, according to the power-off control system of the present invention, the invalidity / effectiveness of the power-off switch of the remote device remote from the main device is controlled. While the main device is using the remote device, it is possible to issue an off switch invalid command from the main device to disable the off switch of the remote device to prohibit inadvertent power off by the off switch of the remote device. When the master device is not using the remote device, the master device can issue an off-switch enable command to return the remote device off-switch to the enabled state. At this time, the power can be turned off by the power off switch of the remote device.

[Brief description of drawings]

FIG. 1 is a block diagram of a power-off control system according to an embodiment of the present invention.

FIG. 2 is a flow chart for explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

 1 Main Device 2 Remote Device 3 Communication Path 4 Transmitter / Receiver Circuit 5 Control Circuit 6 Relay Drive Circuit 7 Power Supply Circuit 8 Momentary Normally Off Switch 9 Momentary Normally On Switch 10 On Switch Controlled by Relay Drive Circuit 11 Controlled by Relay Drive Circuit Off switch a Power off control information b Power off control signal

Claims (1)

[Claims] 1. A computer system having a main unit, a remote unit having a power switch, and a transmission means for transmitting a control signal from the main unit to the remote unit, the main unit being provided with the power source of the remote unit. Commanding means for instructing a remote device to supply a power-off control signal indicating whether or not to make the off-operation effective when the switch is operated off; and the power-off control signal provided in the remote device, wherein the power-off control signal Control means for invalidating the power-off operation if instructing the invalidation of the off-operation, and control means for validating the power-off operation if the power-off control signal commands the validity of the power-off operation of the remote device. An electronic computer system characterized by being provided.