JPS6129922A - Power control system - Google Patents

Abstract

PURPOSE:To execute automatically the software processing at disconnection of power by detecting that a power disconnection indication is consecutive for a prescribed time or over and disconnecting the power regardless of execution of the power disconnection processing of the device based on the detected output. CONSTITUTION:When a power disconnecting switch 6 is depressed at disconnection of power, cut-off information is received by a receiver 13 and an interruption of the power disconnection is given to a control section 14. After the prescribed power interruption processing is executed to the control section 14, the power interruption signal is outputted through a driver 12. The power interruption relay 8 is activated succeedingly, a contact 8a disconnects a self-hold circuit of a power application relay 7 to interrupt the power. A timer 10 is operated as soon as the switch 6 is depressed and after a depression time for a prescribed time or over is counted, an operating signal is outputted to a power interruption relay 9. The relay 9 opens a contact 9a to disconnect the self-hold circuit of the relay 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply control method for turning on/off power to an electronic device.

In recent years, in order to improve the reliability of electronic devices and to quickly repair them in the event of a failure, an increasing number of electronic devices are collecting the operating status and cause of failure of each part of the electronic device (hereinafter referred to as error logging). Particularly with the adoption of micro-computers, systems that store the above-mentioned logging data in RAM and then save it to a disk or the like (hereinafter referred to as "save") have come into widespread use.

However, the above-mentioned information collected in the RAM when the power is turned off must be saved by an operator's operation, but it is easy to forget, and the operation is also troublesome. Therefore, when the power is turned off, it automatically saves the above logging data and executes the necessary software operations when the power is turned off, and then turns off the power.It is also a simple power supply that can forcibly turn off the power even in the case of an electronic device failure. A control method is required.

[Conventional technology]

The conventional power control method for electronic devices is to directly turn on/off the power to the electronic device using an on/off switch, but when using software such as saving errors and logging, the operator operates the keys attached to the electronic device. It was done by

[Problem that the invention seeks to solve]

Therefore, when the operator turns off the power, there are problems in that the operator often forgets to perform power-off processing such as error logging, saving, etc., and the operation is also troublesome.

[Means for solving problems]

The above-mentioned problem with the conventional method is that after the electronic device executes the power-off process, the electronic device has a power supply unit that turns on/off the power, an instructing means for instructing the operator to turn off the power, and power-off information from this instructing means. A control means for sending a power cutoff signal to the power supply unit to turn off the power supply, and a detection means for detecting that the power cutoff instruction from the instruction means continues for a certain period of time or more, and based on the detection output of the detection means, This problem can be solved by the power control method according to the present invention, which turns off the power regardless of whether the power cutoff process of the device is executed.

[Effect]

According to the present invention, when the power cut-off switch of an electronic device is pressed, the power is automatically cut off after performing power-off operations such as error logging, so that the above-mentioned processing that conventionally required an operator's intervention can be reliably performed. Even if the control unit of a microcomputer or the like in an electronic device fails and the power cannot be turned off by the above operation, the power can be forcibly turned off by simply pressing the power cut-off switch for a certain period of time. can.

〔Example〕

An embodiment of the present invention will be described with reference to FIG.

In FIG. 1, 1 is a power supply control device, 2 is an electronic device, and 3 is a power control device.
is the power supply device (POW3) of electronic bag M2.

5 is a non-locking power-on switch (SW5) that is connected to the circuit only when pressed; 6 is a non-locking power-off switch (SW6); 7 is a power-on relay (REL7); 7
a and 7b are the contacts of REL7, 8 is the power cutoff relay (
REL8), 8a is the contact of REL8, and 9 is the power cutoff relay (REL9).

9a is a contact point of REL9, 10 is a timer, 11 is an interface between SW6 and the control unit 14, 12 is a driver (DR) that drives REL8, and 13 is a receiver that receives the push signal of SW6 and sends an interrupt signal to the control unit 14. (REC
), 14 is a control section of the electronic device 2.

The operation of turning on/off the power in the above configuration will be explained.

Powering on is the same as the conventional method, and when SW5 is pressed, REL7 is activated and contact 7a is closed.

Self-hold REL7. At the same time, the contact 7b closes and the POW3 of the electronic device 2 is energized, and the operation of the electronic device 2 starts.

The power-off operation is as follows.

(1) When SW6 is pressed, disconnection information is received by the REC 13 through the ink face 11, and an interrupt signal for power disconnection is sent to the control unit 14.

(2) Upon receiving the interrupt signal, the control unit 14 executes a predetermined power-off process 1, such as error logging, saving, etc., and then outputs a power-off signal through the DR 12. Subsequently, REL8 operates, contact 8a disconnects the self-holding circuit of REI, 7, and the power is cut off.

(3) The timer 10 starts operating at the same time as SW6 is pressed, and when SW6 is pressed for more than a predetermined period of time (for example, 1 second), the timer 10 counts the predetermined period of 1 second, and then
Outputs an operation signal to REL9.

Note that the timer 10 is reset when SW6 is disconnected. Therefore, if SW6 is turned on for less than 1 second, timer 10 is set to REL.
Operation (2) takes priority without outputting to 9.

(4) REL9 opens contact 9a by the above signal and REL
7. Disconnect the self-holding circuit.

In addition, the self-holding circuit of REL7 is 100 to 101 in Figure 1.
It is composed of circuits ranging from 102 to 102.

As described above, the power can be turned off by pressing the SW 6 for a certain period of time to turn off the power normally, and by pressing the SW6 for a certain period of time or more to forcibly turn off the power.

〔Effect of the invention〕

As explained above, according to the present invention, when the power cut-off switch is pressed, the power is cut off after executing the predetermined power-off processing, and when the power cannot be cut off due to a failure of the control unit or the like, or when the above-mentioned processing is unnecessary. It is possible to disconnect the power supply by pressing the switch for a certain period of time or more, and it is possible to automatically execute software processing such as error logging when the power is turned off, which conventionally requires operator intervention.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. In the figure,
Meme 5 is the power on switch. 6 is a power cutoff switch, 7 is a power on relay. 8 is a power cutoff relay, 9 is a power cutoff relay. 10 is a timer, 12 is a driver. 13 is a receiver, 14 is a control unit. It is.

Claims (1)

[Claims] This is a power control method for turning on/off the power of an electronic device, which includes a power supply section for turning on/off the power, an instruction means for instructing the operator to turn off the power, and power-off information from the instruction means to control the electronic device. A control means for sending a power-off signal to the power supply unit to turn off the power after the device executes a power-off process, and a detection means for detecting that a power-off instruction from the instruction means continues for a predetermined period of time or more. ,
A power supply control method characterized in that the power supply is cut off based on the detection output of the detection means regardless of whether the power supply cutoff process of the apparatus is executed.