JPH06100943B2 - Power supply stop control method for processing apparatus and apparatus therefor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power stop control method for a processing apparatus and its apparatus, and more particularly, a power stop control method and apparatus for enabling cooperation with processing of a system program. Regarding

[Conventional technology]

Some operating systems or system programs require specific processing before powering down. For example, in the UNIX operating system at AT & T, "UNIX Systen V System Administration Reference Manual"
Before shutting down the power, manually select "Shutdo
It is necessary to input the "wn" command, terminate the process, close the file, and then turn off the power.

[Problems to be Solved by the Invention]

In the above-mentioned conventional technology, when the power of the processing device is accidentally cut off or the power is cut off by forgetting to input the "Shutdown" command, the file management information may be destroyed and a serious failure may occur. It was

It is an object of the present invention to provide a power stop control method and its device that do not cause a failure even if the power is accidentally cut off due to an erroneous operation of a switch attached to a processing device.

[Means for Solving the Problems]

The above object is to output a suppression signal for suppressing power cutoff to the power supply control device when a power cutoff request is made by a switch operation to an operating system that requires special processing before power cutoff. A first timer having a function and having a time sufficient for the power supply control device to output the above-mentioned inhibition signal from the operating system that requires it after the power supply shutdown request is made; A second timer that sets a time sufficient to complete the special processing after the request is made is provided, and the first and second timers are started when a power-off request is generated, and the inhibition signal is When it is turned off, when the first timer times out without input of the inhibition signal, or when the second signal is generated regardless of the inhibition signal.
This is achieved by executing a cutoff control that causes the power supply control device to cut off the power when the timer has timed out, and by providing a control circuit for executing this cutoff control.

[Work]

After the power cutoff request is made, if the cutoff suppression signal from the operating system is input before the first timer times out, the power cutoff is not performed while this request continues. As a result, the operating system can suppress the power shutdown until the special processing required for power shutdown is completed, and the file is not destroyed. If the inhibition signal does not turn off even after the time required for the special processing after the power shutdown request has passed, the second timer times out and shuts off the power regardless of whether there is a power shutdown inhibition request. This ensures that the means of powering is always carried out even if the operating system malfunctions. Further, when the operating system that does not require the special processing associated with the power shutdown is running, the power shutdown suppression request does not occur. In this case, the power supply is cut off due to the time-up of the first timer, and an unnecessary waiting time for the operator does not occur.

〔Example〕

FIG. 2 is a block diagram showing a processing system using the power supply control device according to the present invention. The power supply 11 of the processing device 10 is controlled by the power supply control device 12. A power switch 13 is attached to the power control device 12.

FIG. 1 is a block diagram showing an embodiment of the present invention, showing the inside of the power supply control device 12. In the figure, timer 1
Is set to a time sufficient for the operating system to output a shutdown inhibition signal when there is a power shutdown request, and the timer 2 is set to a time sufficient to complete the special processing. The relay 3 opens and closes the current of the processor power supply 11, which is controlled by the control circuit 4. The control circuit 5 turns on the shutoff request signal 6 when instructed to shut off the power by operating the switch 13 on the panel of the power control device 12, and turns on the shutoff request signal 7 when instructed to turn on the power.
To turn on. The signal line 8 is a power shutoff suppression request line from the processing device 10. The control circuit 4 controls so that the relay 3 closes the primary line 9 of the power supply immediately when there is a request for closing through the signal line 7. Further, when there is a request for interruption through the signal line 6, the relay 3 is controlled as follows according to the timing states of the timers 1 and 2 and the state of the power interruption inhibition request signal 8 from the processing device.

FIG. 3 is a flowchart showing an operation when a system program requiring special processing (shutdown processing) normally operates. First, when the switch 13 instructs the power supply to be shut off (step 301), the power supply control device 12 outputs the shutoff request signal 6 to the processing device 10 and starts the timing of the timers 1 and 2 (step 302). . The system program of the processing device 10 which has received the shutoff request signal 6 turns on the power shutoff inhibition request signal 8 (step 311) and starts the shutdown processing (step 312). Yes (Step 31
3). The power supply control device 12 detects the rising of the power cutoff suppression request signal 8 to cancel the time measurement of the timer 1 (step 303), and detects the falling of the signal 8 to cancel the timer 2 and cut off the power. Perform (step 304).
As a result of the above operation, when the shutdown process is completed after the shutdown instruction by the switch operation, the power is immediately shut off.

FIG. 4 is a flow chart showing the operation when an abnormality occurs in the shutdown processing 312 of FIG. 3 and the power shutdown inhibition request signal 8 is not turned off.
The steps up to 411 and 403 are the same as steps 301, 302, 311 and 303 in FIG. However, an error occurred during shutdown processing 412
Occurs, the power supply cutoff suppression request signal 8 is not turned off, so the timer 2 times up and the power supply is cut off (step 404). As a result, the system power is surely turned off even if the shutdown process is abnormal.

FIG. 4 is a flowchart showing the operation in the case of a system program that does not require special processing (shutdown processing), and steps 501 and 502 are the same as steps 301 and 302 in FIG. However, in this case, the shutdown processing is unnecessary, so that the power shutdown inhibition request 8 is not sent back to the shutdown request signal 6. For this reason, the timer 1 times out, and the timer 2 is released and the power is cut off (step 503). In the above operation, the power is cut off after the timer 1 (short time counting) is timed, so that the operator is prevented from waiting for a long time.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, even if the power-off is requested by an unexpected switch operation, the shutdown process can be executed by the system program without fail, and the system program that does not require the shutdown process is running. Also, there is an effect that the power is cut off without the operator having to wait for a long time, and when the shutdown process is abnormal, the power can be surely cut off after a certain time.

[Brief description of drawings]

FIG. 1 is a block diagram of a power supply control device according to the present invention, and FIG.
The figure is an overall view of the processing apparatus system, and FIGS. 3 to 5 are flowcharts showing the power shutoff operation. 1,2 ... Timer, 4 ... Control circuit, 10 ... Processor, 12
...... Power control device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Miyazaki 5-2-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Omika factory (72) Inventor Yoshiaki Takahashi 5-chome, Omika-cho, Hitachi-shi, Ibaraki No. 1 Incorporated company Hitachi Ltd. Omika factory (72) Inventor Takayuki Morioka 5-21 Omika-cho, Hitachi City, Ibaraki Prefecture Incorporated company Hitachi Ltd. Omika factory (72) Inventor Hiroshi Watanabe Omika, Hitachi City, Ibaraki Prefecture 5-2-1, Machi, Hitachi Ltd., Omika Plant (72) Inventor, Takao Nouchi 5-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture, Ltd., Omika Plant, Hitachi, Ltd. (72) Inventor, Otsuka Otsuka 5-2-1 Omika-cho, Hitachi City, Ibaraki Prefecture, Hitachi Control Systems Co., Ltd. (72) Inventor Tomoaki Nakamura Ibaraki Japan 5-2-1 Omika-cho, Tate-shi Incorporated company Hitachi, Ltd. Omika-factory (72) Inventor Kazuya Miyamoto 2--9-1, Aize-cho, Hitachi, Ibaraki Hitachi Service Engineering Co., Ltd.

Claims (4)

[Claims] 1. An operating system, which requires special processing when powering off a processing device, starts the special processing when a power-off request is input and turns on a power-off inhibition signal until the special processing is completed. The power supply control device is provided with a first timer which is activated by a power cutoff request and measures a preset time, and when the power cutoff request is generated and the operating system at that time issues the cutoff suppression signal. When the power is turned on, the first timer is reset, and the processor power is controlled to be shut off when the power supply inhibition signal is turned off. When a power shutdown request is generated, the operating system shuts off the power. When the inhibition signal is not turned on, the processing device power is shut off when the first timer times out. Power down control method of the processing unit and to control the so that. 2. A power supply control device is provided with a second timer which is activated by a power cutoff request and measures a set time longer than the set time of the first timer, and when the timer times out, the cutoff is performed. 2. The power supply stop control method for a processing apparatus according to claim 1, wherein the processing apparatus power is controlled to be cut off regardless of whether the inhibition signal is on or off. 3. A switch means for generating a power-on / off request for the processing device, a means for opening / closing a current path of the power supply, and a first timer activated by the power-off request to measure a preset time. When the power supply cutoff inhibition signal generated by the processing device is on, the processing device power supply is cut off when the signal is turned off, and when the cutoff suppression signal is off, the first
And a control circuit for controlling to shut off the power source of the processing device when the timer of (1) expires. 4. A second timer is provided which is activated by a power shutoff request and counts a set time longer than the set time of the first timer, and when the second timer times out, the shutoff inhibit signal 4. The power supply control device for a processing device according to claim 3, further comprising a function for controlling the power supply of the processing device to be cut off regardless of whether it is on or off.