JPH0223409A - Power source turning-off control system - Google Patents

Abstract

PURPOSE:To turn off an efficient alternating current power source in accordance with the constitution of a self-system in any system by outputting a waiting time until the alternating current power source is turned off, to a power source control device for the switching instruction of the power source device with the power source controlled device. CONSTITUTION:At a power source control device A, an alternating current power source turning-off waiting tie value from a power source controlled device B-1 is held at an alternating current power source turning-off waiting time detecting part 2, thereafter, the device power source turning-off instruction to other power source controlled device, and the alternating current power source waiting time value of respective power source controlled values is successively fetched into the detecting part 2. After all turning-off instructions are completed, a maximum alternating current power source turning-off waiting time detecting part 3 detects the value of the longest waiting time from the detecting part 2 and sets it to a system parting board turning-off timer 4. Thereafter, when the timer 4 counts out, the turning-off instruction to a system parting board C. Thus, the efficient alternating current power source can be turned off in accordance with the constitution of the own system.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power cutoff method for a computer system, and more particularly to a power cutoff control method for a system distribution board when the power is cut off.

[Conventional technology]

Conventionally, in this type of power cut-off control method, after the DC power of each power-controlled device is cut off, the AC power of the system distribution board is cut off after a uniquely determined waiting time has elapsed.

[Problem to be solved by the invention]

The conventional power-off control method described above has the following drawbacks.

(1) In the uniquely defined waiting time method, it is impossible to control disconnection according to the system configuration, and the disconnection time of the entire system cannot be shortened.

(2) In the method of setting the AC power cutoff wait time in the power supply control device, it is necessary to consider the characteristics of each power supply controlled device for each system. Furthermore, if a power-controlled device is added that requires AC power to be supplied for a longer period of time than the currently set waiting time, it is necessary to change the already set waiting time.

[Means to solve the problem]

The power cut-off control method of the present invention is a power cut-off control method in which the DC power of each power-controlled device constituting a computer system and the AC power of the system distribution board are sequentially cut off by the power control device. The control device has means for cutting off the DC power supply in response to an instruction to cut off the device power from the power supply control device, and means for outputting an AC power cutoff waiting time value to the power supply control device. It has a means for detecting the maximum value of the AC power disconnection waiting time value from the device and setting it as the AC power disconnection waiting time value of the system, and after the device power is disconnected and the waiting time elapses, the AC power of the system distribution board is turned off. The feature is that the power is cut off.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which a power supply control device A is connected by a power supply control interface X between each of the power supply controlled devices B-1 to B-n and a system distribution board C. Power controlled devices B-1 to B-n in the order specified by device A.
Power off control is performed. In addition, the power supply control device A is connected to the system distribution board C via the distribution board control interface Y.
After turning off all device power to each of the power-controlled devices B-1 to B-n, the system AC power source is controlled to be cut off.

Figure 2 shows power supply control device A and one power supply controlled device B-1.
This shows the connection relationship. The power supply control device A includes a device power cut-off instruction section 1, an AC power cut-off waiting time detection section 2, a maximum AC power cut-off waiting time detection section 3, and a system power distribution board cut-off timer 4. On the other hand, the power-controlled device B-1 includes a power-off control section 5 and an AC power-off waiting time sending section 6.

A power-off instruction is sent from the device power-off instruction unit 1 of the power supply control device A to the power-controlled device B- via the power control interface X.
1, the power-controlled device B-1 executes the power-off operation by the power-off control unit 5, and also sends the AC power-off wait time sending unit 6 to the power supply control device A to wait for AC power-off of the own device. Output the time value.

In the power supply control device A, the AC power supply cutoff wait time value from the power supply controlled device B-1 is held in the AC power supply cutoff wait time detection unit 2, and thereafter, the AC power supply cutoff wait time value from the power supply controlled device B-1 is held in the AC power supply cutoff wait time detection unit 2, and from then on,
At the same time, the AC power disconnection waiting time value of each power-controlled device is sequentially fetched into the AC power disconnection waiting time detecting section 2. When the instruction to turn off the device power to all power-controlled devices is completed, the maximum AC power-off waiting time detection section 3 detects the longest value of the waiting time from the AC power-off waiting time detection section 2 of each power-controlled device. Then, the maximum AC power supply disconnection waiting time is set in the system distribution board disconnection timer 4.

After this, the power supply control device A uses the system power distribution board disconnection timer 4.
When the timer times out, an AC power supply disconnection instruction is sent to the system distribution board C via the distribution board control interface Y.

〔Effect of the invention〕

As explained above, in the present invention, in response to a disconnection instruction from the power supply control device, the power supply controlled device outputs a waiting time value until cutting off the AC power to the power supply control device. In the system as well, the AC power source can be efficiently cut off in accordance with the configuration of the system itself, and new power-controlled devices can be easily added.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 2 is a block diagram showing the main parts of the figure in detail. A: Power control device, B-1 to Bn: Power controlled device, C: System distribution board, X: Power supply control interface, Y: Distribution board control interface, 1
... Device power cut-off instruction section, 2... AC power cut-off waiting time detection section, 3... Maximum AC power cut-off wait time detection section, 4... System distribution board cut-off timer, 5... Power supply Disconnection control unit, 6...AC power supply disconnection waiting time sending unit.

Claims (1)

[Claims] In a power cut-off control method in which the DC power of each power-controlled device constituting a computer system and the AC power of a system distribution board are sequentially cut off by a power control device,
The power-controlled device has means for cutting off the DC power supply in response to a device power-off instruction from the power supply control device, and means for outputting an AC power cut-off waiting time value to the power supply control device. It has a means for detecting the maximum value of the AC power disconnection waiting time value from the power supply control device and setting it as the AC power disconnection waiting time value of the system, and after the device power is disconnected and the waiting time elapses, the system distribution board A power supply cutoff control method characterized by cutting off an AC power supply.