JPH0778701B2 - Power control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] According to the present invention, a power-off suppressing bit is provided for each alarm of a power supply device, and whether the power-off is suppressed when a corresponding alarm is generated by the power-off suppressing bit. This is so that it is possible to select whether or not.

[Industrial application field]

The present invention relates to a power supply control system, and more particularly to improvement of a power supply cutoff prevention function when an alarm occurs.

[Conventional technology]

As shown in FIG. 2, a power supply device such as an electronic calculator which uses various kinds of power supplies is controlled by a power supply control device 10 to generate various power supplies 1.
It controls 6,17,18,19. This power control device 10 has
A control unit 1, a power-on / off unit 2, an alarm receiving circuit 3 and the like are provided to control the power-on sequence of various power sources 16 to 19 and to control the power to be turned off by an alarm issued from each unit when an abnormality occurs. .

The above alarms include fans 13 and 1 for the power supply itself and the air-cooled load.
4 alarm PFA, MPA, alarm MTA from the air-cooling load temperature sensor 15 and a water temperature sensor 23 that monitors the temperature of the cooling water for the water cooling load 21 supplied from the cooling water supply device 24 through the pipe 22 There are alarm WTA and alarms ALM1, ALM2, ALM3, ALM4, etc. that indicate an abnormality of the power supply itself.
In the figure, 11 is a display device, 12 is a keyboard, and 25
Is various elements such as LSI, and 26 is a cold plate for cooling them.

With the conventional alarm function in the power supply, all the power supplies 16 to 19 are disconnected when an alarm occurs, so you want to disconnect the power supplies 16 to 19 when an alarm occurs, such as when testing the power supply. It was very inconvenient because I was disconnected when I wasn't there.

Therefore, a recent power supply device is provided with a power-off suppressing function to prevent meaningless disconnection of the power supplies 16 to 19.

FIG. 3 is a diagram showing a main configuration of the power supply suppression function. The control unit 1 sends out a power supply disconnection suppression signal INH that specifies whether or not to suppress power supply disconnection, thereby enabling / disabling an alarm. To control.

For example, in the circuit configuration shown in the figure, the power-off suppression signal INH
When is '0', power off is suppressed. That is, various alarms ALM
If one of 1, ALM2, ALM3, ALM4, ... Occurs, this is sent to the NAND circuit 8 via the OR circuit 7. The NAND circuit 8 outputs an inverted signal of a logical product of the power-off suppressing signal INH. Therefore, if the power-off inhibition signal is "0", the output of the NAND circuit 8 is "1". AND
Since the circuit 9 outputs a logical product of this and the power-on signal PON, that is, "1", as long as the power-on / off unit 2 outputs the power-on signal PON, the output of the AND circuit 9 is "1". '
Retained as is. The output of the AND circuit 9 is input to the power supplies 16 to 19 as shown in FIG. Therefore, even if an alarm occurs, disconnection is suppressed and the power remains on.

However, the power-off suppressing function is a function for not turning off the power even if any alarm is generated, and it is not possible to select whether or not the power-off is suppressed depending on the type of the alarm.

When testing the power supply, tests may be performed that exceed the guaranteed limits specified in the specifications of the device. For example, in a power supply device that uses both water cooling and air cooling, when trying to check the margin for only the water cooling part or the air cooling part,
It becomes necessary to perform high temperature aging exceeding the guaranteed limit.
In such a test, it is necessary to prevent the power from being cut off even if an alarm related to the test target part occurs, but if an alarm other than the test target alarm occurs, turn off the power supply for the safety of the device. Need to disconnect.

However, in the past, when the power off suppression function was activated,
For all alarms, the power off suppression has been activated,
The safety of the device cannot be guaranteed.

[Problems to be solved by the invention]

As described above, in the conventional power supply device, there is a problem in that it is not possible to select whether or not to perform power-off suppression for each type of alarm.

Therefore, it is an object of the present invention to make it possible to select whether or not to perform power off inhibition for each alarm.

[Means for solving problems]

In the present invention, the power supply control device is provided with a power-off control register, each bit of which is associated with an individual alarm, and depending on the value of each bit being "0" or "1", the power-off control is performed by the corresponding alarm. It is configured to select whether to perform or not.

[Work]

In the present invention, each bit of the power-off suppression register can be made to correspond to each alarm, and the power-off suppression function can be enabled / disabled for each alarm, so that the power-off suppression function works only for a desired alarm. be able to.

〔Example〕

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

As shown in FIG. 1, in this embodiment, the control unit 1 is provided with a power-off suppressing register 30. Power off suppression register 30
2 correspond to the alarms of the power supply devices 16 to 19 shown in FIG. Although only four alarms ALM1 to ALM4 are shown in the same figure, this is for convenience of description, and in fact, as shown in FIG. 1, there are many alarms.
Therefore, the power-off suppression register 30 is not limited to 4 bits as shown in the figure, and a register having more bits may be used if necessary.

Each bit of the power-off inhibition register 30 is logically operated by the corresponding alarm ALM1 to ALM4 in the AND circuit 4, and the logical seats of both are input to the NOR circuit 5. And AND
The logical product of the output of the NOR circuit 5 and the power-on signal PON output from the power-on / off unit 2 is obtained via the circuit 6. The output of the AND circuit 6 is input to the power supplies 16 to 19 shown in FIG.

In this configuration, even if an alarm [alarm ALM3 in the figure] corresponding to a bit whose value is '0' among the bits of the power-off suppression register 30 is generated, the power-off is suppressed.

The operation of this embodiment will be described below.

When each of the alarms ALM1 to ALM4 shown in the figure is "0", that is, when the alarm is not generated, the output of the AND circuit 4 is all "0" regardless of the value of each bit of the power-off suppression register 30. Therefore, the output of the NOR circuit 5 becomes "1", and the power remains on as long as the power-on signal PON is "1".

If any of the alarms ALM1, ALM2, or ALM4 becomes "1", the output of the corresponding AND circuit 4 becomes "1" and OR
The output of the circuit 5 is inverted to "0". Therefore, the output of the AND circuit 6 becomes "0", and the power supply is cut off.

However, even if the alarm ALM3 becomes "1", the corresponding bit in the power-off suppression register is "0", so the alarm ALM3
The output of the AND circuit 4 connected to is unchanged at "0".
Therefore, since the outputs of the OR circuit 5 and the AND circuit 6 do not change, the power supply is suppressed even if the alarm ALM3 is generated.

As described above, in this embodiment, by setting the value of each bit of the power-off suppression register 30 to any value, it is possible to enable / disable the power-off suppression for each alarm. Therefore, at the time of testing the power supply device, it is possible to prevent the power supply from being cut off only for a desired alarm without impairing the safety of the entire device.

The present invention is not limited to the above-mentioned embodiment, but can be carried out in various modified forms.

For example, as the power supply suppression register 30, instead of using a separate register, it is possible to use a specific address of the RAM provided in the power supply device.

When an alarm is detected, it is also possible to perform program control so that a power supply cutoff signal POFF [not shown] is output by the power supply suppression bit corresponding to the alarm.

〔The invention's effect〕

As described above, according to the present invention, it is possible to prevent the power supply from being cut off on an alarm-by-alarm basis. Therefore, when an alarm occurs in a portion other than the test target, it can be protected and the safety of the device is not impaired. .

[Brief description of drawings]

FIG. 1 is an explanatory diagram of the configuration of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the configuration of a conventional power supply device, and FIG. 3 is an explanatory diagram of a conventional power supply control system. In the figure, 1 is a control unit, 2 is a power on / off unit, 3 is an alarm receiving circuit, 4 and 6 are AND circuits, 5 is a NOR gate,
30 is a power-off suppression register, and ALM1 to ALM4 are alarms.

Claims (1)

[Claims] 1. A plurality of power supplies are provided to control turning on / off of each power supply, monitor various states of each power supply, and when an abnormality is detected, an alarm (ALM) corresponding to the type of the abnormality is detected.
1, ALM2, ALM3, ALM4, ...) In the power supply control device, the power-off suppression register (30) having the bit corresponding to the type of each alarm (ALM1, ALM2, ALM3, ALM4, ...) The corresponding alarm (ALM1, ALM2, ALM3, ALM4, ...) Is provided depending on the value set in each bit of the power-off suppression register (30).
・) A power control method characterized in that it is configured to select whether or not to suppress power-off when () occurs.