JPH11155243A - Uninterruptible power equipment and computer system with the uninterruptible power equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an uninterruptible power equipment with which processings at service interrupt can be conducted properly by a computer. SOLUTION: An arithmetic processing function section 22 for a microcomputer section 2 in an uninterruptible power equipment 1 arithmetically calculates the available time of a computer 3 and a printer 4, on the basis of the residual capacity of a battery 3 at service interrupt and informs the computer 3 of the available time through a communication facility section 24. The computer 3 determines the stop operation of peripheral equipment and the order of the stopping operation, such as the continuation or interrupt of the printing of the printer 4 and the shutdown period of the computer 3 in response to the available time. The uninterruptible power equipment 1 stops the supply of power by a command from the computer 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uninterruptible power supply suitable for electric equipment, particularly for a computer, and a computer system including a computer, a peripheral device of the computer, and an uninterruptible power supply.

[0002]

2. Description of the Related Art When a power failure occurs during operation of an electric device, particularly a computer, data may be lost or a hardware failure may occur, and it may not be possible to completely restore the state before the power failure. Therefore, in the event of a power outage, an uninterruptible power supply that uses a stored power to automatically switch the power supply to a storage battery so that the computer can perform a stop operation of peripheral devices and the computer and that communicates with the computer is used. I have. As an uninterruptible power supply having a function of communicating with a conventional computer, Japanese Unexamined Patent Publication No.
There is an apparatus such as that described in Japanese Patent No. 334277, which shuts down by providing information of power failure detection to a computer. Further, when a plurality of electric devices are connected as in Japanese Patent Application Laid-Open No. 6-22473, the voltage or current required for the operation of the plurality of devices is recorded in advance in the uninterruptible power supply, and the remaining capacity of the storage battery at the time of power failure is calculated. Some supply power within the range. At this time, the order of prioritizing the operation of the plurality of electric devices and the time to maintain the operation are stored in advance in the uninterruptible power supply, and the uninterruptible power supply supplies power according to the priority.

[0003]

However, since each electric device consumes different power during operation and during standby, the voltage or current necessary for operation of each device recorded in the uninterruptible power supply beforehand is actually different. Is not always appropriate in the event of a power outage. In addition, since the priority order varies depending on the use status of each device, even if the priority order is stored in advance in the uninterruptible power supply, sufficient power cannot be supplied to devices that actually require power. There was an inconvenience.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an uninterruptible power supply for supplying electric power so that an electric device can perform an appropriate stop operation at the time of a power failure, in particular, a computer can perform an appropriate stop processing operation and a shutdown operation. It is in.

Another object of the present invention is to provide a computer system in which a computer performs an appropriate stop processing operation and a shutdown operation at the time of a power failure, and a peripheral device of the computer can perform an appropriate stop processing operation. .

[0006]

According to a first aspect of the present invention, there is provided a rectifier circuit for rectifying an alternating current supplied from an alternating current power supply to a direct current, and a charging device for charging a storage battery with a direct current output from the rectifier circuit. A circuit, an inverter circuit that converts a DC output from a rectifier circuit or a DC output from a storage battery into AC, and an AC or AC circuit that is supplied from an AC power supply can be individually output to a plurality of loads. A switch circuit, a communication unit for communicating with the outside, and a power supply that outputs AC from the inverter circuit to the load when a power failure occurs, and a switch circuit when power supply to the load becomes unnecessary after the power failure occurs. Control means for operating and stopping the supply of power to the load, wherein when the load is a computer and its peripherals, Computer an accident occurs is an uninterruptible power supply for supplying each power and the power required peripherals computer performs a stopping operation required for computers and peripherals to perform a shutdown operation. In the present invention, the control means is provided with a calculation unit for calculating the available time of the power supply after the occurrence of the power failure or the remaining capacity of the storage battery. The control means notifies the computer of the occurrence of the power failure and the usable time or the remaining capacity to the computer using the communication means when the power failure occurs, and operates the switch circuit according to the command notified from the computer through the communication means. The power supply to the computer and the peripheral devices is stopped.

In the uninterruptible power supply according to the present invention,
Generally, AC supplied from an AC power supply, which is a commercial power supply, is converted into DC by a rectifier circuit, and a charging circuit charges a DC output of the rectifier circuit to a storage battery. DC output from the rectifier circuit or the storage battery is converted into AC by an inverter circuit, and AC is individually output to a plurality of loads by a switch circuit. The communication means communicates with the outside. Normally, the control means supplies an AC from an AC power supply to the load as it is through a switch circuit, or converts a DC output from the rectifier circuit into an AC by an inverter circuit and outputs the AC to the load. When a power failure occurs, the inverter outputs AC to the load using the storage battery as a power supply, and when the power supply to the load becomes unnecessary after the power failure occurs, that is, a computer stop processing operation and a shutdown operation and a peripheral device stop processing operation. Is completed, the switch circuit is operated so as to stop supplying power to the load.

When the load is a computer and peripheral equipment of the computer, when a power failure occurs, the computer supplies the computer with electric power necessary for performing a stop processing operation and a shutdown operation. The power required to perform the operation is supplied to the peripheral devices of the computer. Here, the computer is generally a personal computer, but its size does not matter.

[0009] When a power failure occurs, a computing unit provided in the control means computes the available time of the power supply or the remaining capacity of the storage battery. The control means notifies the computer of the occurrence of the power failure and the result of the calculation using the communication means. The computer notifies a command through the communication unit based on the result of the operation, and the control unit operates the switch circuit in response to the command to stop supplying power to the computer and peripheral devices of the computer.

As described above, the uninterruptible power supply according to the present invention determines the stop time of the power supply to the computer and the peripheral devices only by notifying the computer of the occurrence of the power failure and the usable time or the remaining capacity. Is left to the computer. With this configuration, the computer can determine the stop processing operation and the stop time of the peripheral device, and the computer can determine the stop processing operation and the start time of the shutdown operation. Will be higher. Accordingly, the computer can properly perform the stop processing operation and the shutdown operation of the computer, and can properly perform the stop processing operation of the peripheral device of the computer.

The calculating section calculates the available time or available capacity based at least on the remaining capacity of the storage battery. The usable time may be calculated in consideration of the power consumption of the computer and the peripheral device as the load, but the standard load may be determined in advance and the usable time may be calculated based on the standard power consumption of the standard load. . If the available time is calculated based on the standard power consumption of the standard load, the computer must correct the available time notified from the uninterruptible power supply using the ratio of the actual power consumption to the standard power consumption. I just need. The remaining capacity may be calculated using a known remaining capacity measuring method. Usable time or remaining capacity data may be notified to the computer not only when a power outage occurs but also thereafter. The computer determines the stop processing operation and the stop time of the peripheral device according to the usable time or the remaining capacity, the operation state of the peripheral device at the time of the power failure and the data processing state of the computer, and also performs the stop processing operation of the computer. And the end time of the shutdown. As described above, according to the present invention, the stop processing operation and the stop time of the peripheral device and the computer can be determined on the computer side, so that the degree of freedom in the data processing on the computer side and the operation of the peripheral device increases.

The uninterruptible power supply may be connected to a computer and configured as an independent device, or may be built in the computer or other electric devices.

According to a second aspect of the present invention, the control means is configured to notify the computer that the emergency light is included in the load when a power failure occurs when the load includes the emergency light. According to such a configuration, the computer can perform the shutdown operation by calculating the power consumption for keeping the emergency light on, and can also cause the peripheral device to perform the shutdown operation, and the computer user can perform the power failure accident. Can be known.

According to a third aspect of the present invention, there is provided a computer, peripheral devices of the computer, and power required for the computer to perform a shutdown operation when a power failure occurs and power required for the peripheral device to perform a stop operation. And an uninterruptible power supply for supplying the power supply to a computer and peripheral devices, respectively. The uninterruptible power supply is
A rectifier circuit that rectifies AC supplied from an AC power supply into DC, a charging circuit that charges a storage battery with a DC output from the rectifier circuit, and an inverter circuit that converts DC output from the rectifier circuit or DC output from the storage battery into AC. A switch circuit configured to be able to individually output the output of an AC or inverter circuit supplied from an AC power supply to a computer and peripheral devices, and communication means for performing communication with the outside;
When a power failure occurs, the storage battery is used as a power source to output AC from the inverter circuit to the load, and when supply of power to the computer and peripheral devices becomes unnecessary after the power failure occurs, the switch circuit is operated to supply power to the computer and peripheral devices. Control means for stopping the supply, and when a power failure occurs, supplies power necessary for the computer to perform the shutdown operation and power necessary for the peripheral device to perform the stop operation to the computer and the peripheral device, respectively. It is configured as follows. According to the present invention, the control unit of the uninterruptible power supply device includes a calculation unit that calculates a usable time of the power supply after the power failure occurs. When a power failure occurs, the control means notifies the computer of the occurrence of the power failure and the usable time to the computer using the communication means, and operates the switch circuit in response to a command notified from the computer through the communication means to operate the computer and peripheral devices. The power supply to the device is stopped. Then, when the computer receives the notification that the power failure has occurred from the uninterruptible power supply, the computer notifies the uninterruptible power supply of a command to stop the supply of power to the peripheral devices while stopping the peripheral devices within the usable time, Terminate the shutdown operation within the usable time and notify the uninterruptible power supply of a command to stop supplying power to the computer after the shutdown operation before the shutdown operation ends, or shut down within the usable time After the operation is completed, a command to stop supplying power to the computer is notified to the uninterruptible power supply.

In the present invention, the computer receives the notification from the uninterruptible power supply and performs a stop process so that the computer and the peripheral devices can be stopped within the usable time. First, an appropriate stop processing operation is performed by controlling peripheral devices. For example, if a printer is connected to a computer as a peripheral device, all data will be emitted by the printer according to the available time and stopped,
It is determined whether the printer should be stopped halfway and the remaining data should be saved and then stopped, or the operation should be stopped immediately and executed. This is for other peripherals such as modems and OCR
(Optical Character Reader) and the like.

After the termination of the peripheral device stop processing, a command to stop supplying power to the peripheral device is notified to the uninterruptible power supply. The uninterruptible power supply device that has received the notification controls the switch circuit by the control unit to stop supplying power to the peripheral device notified through the communication unit. When each peripheral device stops, the computer performs a stop processing operation of the computer, and after performing a shutdown operation, causes the uninterruptible power supply to stop supplying power to the computer.
At that time, the computer issues a command to stop the supply of power to the computer after the shutdown operation before the shutdown operation ends, or a command to stop the supply of power to the computer after the shutdown operation ends. Notify the device. The timing for performing the shutdown operation is also arbitrarily determined by the computer itself according to the usable time. For example, if the shutdown operation is performed just before the usable time, when the power is restored by that time, the computer can be restored immediately without restarting the computer.

Until the uninterruptible power supply receives a command to stop the supply of power from the computer, the inverter circuit converts the DC output from the storage battery into AC and outputs it to the computer and its peripheral devices. That is, the switch circuit is controlled so that the supply of power to each of them is stopped when the respective shutdown operation or stop processing operation ends.

According to the computer system described above, since the stop processing operation and the stop time of the computer and its peripheral devices are determined on the computer side, the degree of freedom in the data processing on the computer side and the operation of the peripheral devices is increased, and It is possible to perform a simple stop processing operation.

In the fourth invention, the load of the uninterruptible power supply includes an emergency light, and the control unit of the uninterruptible power supply notifies the computer that the emergency light is included in the load when a power failure occurs. The third computer is configured to determine the timing of stopping the peripheral device and the timing of shutting down the computer in consideration of the fact that the emergency light is included in the load of the uninterruptible power supply. The computer system of the present invention is configured.

According to such a configuration, the computer can perform the shutdown operation by taking into account the power consumption for turning on the emergency light, and can also cause the peripheral device to perform the shutdown operation.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a main configuration of one embodiment of an uninterruptible power supply according to the present invention. This uninterruptible power supply 1 is a computer system together with a computer 3 and a printer 4 as its peripheral device. Is formed.

In FIG. 1, an uninterruptible power supply 1 includes a rectifier circuit 11 for converting AC from a commercial AC power supply AC to DC,
A charging circuit 12 for charging the storage battery 13 with a DC output from the rectifier circuit 11, a storage battery 13 for supplying power during a power outage,
Inverter circuit 1 that converts the direct current from storage battery 13 and rectifier circuit 11 into the same alternating current as the alternating current from the commercial power supply and outputs the same.
4, a power supply path between the inverter circuit 14 and the commercial power supply AC, a switch circuit 15 for individually turning on / off the power supply to the computer 3 and the printer 4, and communication with the computer 3. Uninterruptible power supply 1 including a communication function unit (communication means) 24 capable of
And a microcomputer unit 2 for controlling the operation of. An AC power supply AC is provided inside the switch circuit 15.
And a switch for switching between the output of the inverter circuit 14 and a plurality of switches that can be switchably controlled to supply alternating current to the computer 3 and the printer 4 individually.
The microcomputer unit 2 includes a rectifier circuit 11 and a charging circuit 1
2, a data acquisition function unit 21 for acquiring data from the storage battery 13 and the inverter circuit 14, an arithmetic processing function unit (arithmetic unit) 22 for arithmetically processing the acquired data, and a rectifier circuit 11, a charging circuit based on the arithmetic processing result. 12, storage battery 1
3, a control function unit 23 for controlling the inverter circuit 14 and the switch circuit 15, a communication function unit 24 for transmitting a result of the calculation in the calculation processing function unit 22 to the computer 3, and receiving a command from the computer 3; It consists of. The data acquisition function unit 21, the arithmetic processing function unit 22, and the control function unit 23 constitute a control unit.

The power from the uninterruptible power supply 1 is supplied to the computer 3 and the printer 4, and information such as the occurrence of a power failure and a decrease in the storage battery voltage is transmitted to the computer 3 through the communication function unit 24. The use state of the printer 4 is grasped by the computer 3 and is transmitted from the computer 3 to the uninterruptible power supply 1. Computer 3 is generally a personal computer.

In this embodiment, even during normal operation, the AC of the commercial power supply is once converted to DC by the rectifier circuit 11, and
Although the inverter system 14 is configured in an on-line system in which the power is converted and output again by the inverter circuit 14, the inverter can be configured in an off-line system in which the inverter is stopped during normal operation only by distributing the AC of the commercial power supply. is there.

Next, the operation of the embodiment shown in FIG. 1 will be described. FIGS. 2 and 3 are flowcharts showing an algorithm of software used in the microcomputer unit 2 and the computer 3 of the uninterruptible power supply 1 in the embodiment shown in FIG. The program for performing the processing in FIG. 2 is stored in a ROM (Read Only Memory) (not shown) of the microcomputer unit 2 of the uninterruptible power supply 1, and the program for performing the processing in FIG. , For example, stored on a hard disk (not shown).

In a normal state, the uninterruptible power supply 1 detects whether or not a power failure has occurred based on the presence or absence of the output of the rectifier circuit 11 (step S11). Is performed (step S1).
2). That is, the uninterruptible power supply 1 directly inputs a DC output from the rectifier circuit 11 for converting AC to DC to the inverter circuit 14, converts the DC output to a predetermined AC by the inverter circuit 14, And power to the printer 4. At this time, the charging circuit 12 is charging the storage battery 13. In this example, when the inverter circuit 14 fails, AC is supplied from the AC power supply AC to the load via the switch circuit 15. If there is no notification of the occurrence of the power failure (step S31), the computer 3 is performing another process (step S32).

When a power failure occurs, the power supply source of the uninterruptible power supply 1 is switched to the storage battery 13, and the inverter circuit 14 continues to output AC. Further, the microcomputer unit 2 notifies the computer 3 that a power failure has occurred (step S13). The usable time is calculated by the arithmetic processing function unit 22, and the result is notified to the computer 3 through the communication function unit 24 (step S14). The usable time is calculated based on at least the remaining capacity of the storage battery 13. That is, the arithmetic processing function unit 22 calculates the remaining capacity of the storage battery 13 based on the charged electricity amount and the discharged electricity amount of the storage battery 13 obtained from the data acquisition function unit 21, and calculates the usable time using the remaining capacity data. I do. For example, based on a predetermined standard power consumption of a standard load,
The time during which the standard load can be operated normally can be obtained from the remaining capacity of the storage battery 13 at the time of the power failure, and this can be calculated as the usable time.

As shown in FIG. 3, when the computer 3 receives the notification of the occurrence of the power failure (step S31), the computer 3 starts the stop processing of the printer 4, which is a peripheral device. First, the status of the printer 4, that is, whether the printer 4 is in use or not is confirmed (step S33). When the printer 4 is not used, the uninterruptible power supply 1 is notified that the printer 4 is not used (step S34). The uninterruptible power supply 1 can individually stop the power supply to each device. When the printer 4 is not used (step S15), the uninterruptible power supply 1 stops supplying power to the printer 4. A stop command is output from the control function unit 23 to the switch circuit 15 to stop the supply of power (step S16).

If the printer 4 is in use (step S33), the computer 3 determines the operation of stopping the printer 4. At this time, the content of the stop processing operation is determined based on the usable time notified from the uninterruptible power supply 1.

First, the printable time is determined from the usable time (step S35). Even if there is sufficient available time and the printer 4 continues the printing operation, the operation can be completed, and the stop processing operation and the shutdown operation of the computer 3 (if other peripheral devices are included, , The stop processing operation) is determined in consideration of whether or not the electric power required for the operation remains. If it is determined that the printing operation is to be continued (step S36), the printing is continued as it is, and the power supply to the printer 4 is continued (step S37).

As described above, the usable time is calculated based on the standard load predetermined in the microcomputer unit 2 of the uninterruptible power supply 1, and the computer 3 calculates the standard power consumption of the standard load and the actual power consumption of the standard load. The usable time is corrected using the ratio to the power consumption, and the above-described determination is made based on the corrected usable time. This ratio is set manually by inputting the load of the printer 4 during printing and standby to the computer 3 in advance, or automatically by detecting the hardware to which the computer 3 is connected. In addition, the usable time is notified from the uninterruptible power supply 1 sequentially, and it is determined whether or not the printing operation can always be continued even while the printing is being continued.

If the printing operation cannot be continued (step S
36) If there is any content left unprinted, the computer 3 stores the data in a non-volatile auxiliary storage device of the computer 3 such as a hard disk (not shown) so that the data to be printed is not erased. Then, the printing operation is stopped (step S38). After the printing operation is completed, the uninterruptible power supply 1 is notified that the use of the printer 4 has been completed (step S39), and the uninterruptible power supply 1 stops supplying power to the printer 4 (step S16).
With the above-described stop processing, regardless of whether the printer 4 is in use or not, the printer 4 can be stopped properly without causing inconvenience such as loss of data.

Although the illustrated system includes only the printer 4 as a peripheral device, the process of stopping the printer 4 has been described. However, other devices, such as a modem during reception and an OCR during reading, perform the same process. Stop processing is performed. When a large number of peripheral devices are included, software for operating the computer 3 is set in advance for each computer system, which device is to be energized with priority and which device is to be stopped.

After the end of the shutdown processing operation of the printer 4, the computer 3 performs its own shutdown processing operation and starts preparations for a shutdown operation. The operation content is determined as to what operation can be performed within the remaining usable time (step S4).
0), after processing necessary operations within the usable time (step S41), the shutdown operation is started, and the end time of the shutdown operation is set to the uninterruptible power supply 1
(Step S42). The start time of the shutdown operation can be adjusted by setting, but usually the shutdown operation is set to start immediately before the usable time expires so that the operation can be started immediately after the power is restored.

In this embodiment, the end time of the shutdown operation is notified in step S42. However, after the shutdown operation is completed, a command for stopping the supply of power to the computer 3 is transmitted to the uninterruptible power supply. 1 may be notified.

The uninterruptible power supply 1 receives the notification of the end time of the shutdown operation from the computer 3 and counts the time until the end time of the shutdown operation. Step S17) Computer 3
The power supply to is stopped (step S18). During the above or when the power is restored after stopping the power supply to the computer 3 (step S19), the uninterruptible power supply 1 can restart the power supply to the computer 3 and the printer 4 (step S19). Step S20). The computer 3 is restarted by restarting the power supply from the uninterruptible power supply 1 (step S43). If the printing operation is interrupted due to the power failure, the printing of the remaining data saved in step S37 is performed. Start operation.

When the operation of the computer 3 is interrupted by the user in the course of the process up to the end of the shutdown operation, the computer 3 executes the work within a possible range, and after the execution or according to the available time. During the execution, the stop processing of the printer 4 and the like are started again.

As described above, according to the uninterruptible power supply 1 according to the present embodiment, the computer 3 can determine the stop processing operation and the stop time of the printer 4,
Since the stop processing operation and the shutdown operation start time can be determined by itself, the degree of freedom in the data processing on the computer 3 side and the operation of the printer 4 is increased. Therefore, the computer 3 can properly stop the printer 4 and perform a proper shutdown operation.

FIG. 4 shows another embodiment. In this embodiment, in addition to the embodiment of FIG.
Are connected to the uninterruptible power supply 1. The operations of the computer 3 and the printer 4 at the time of the power failure are shown in FIGS.
However, since power is supplied to the emergency light 5, the time during which power can be supplied to the computer 3 and the printer 4, that is, the usable time, becomes shorter. The computer 3 considers this and determines the operation content. Thus, at the time of a power failure, the uninterruptible power supply 1 can supply power to the emergency light 5 and keep it on for as long as possible. If the computer 3 or the uninterruptible power supply 1 has a function for managing time, the emergency light 5 is not turned on during a daytime power failure when the power is not required and the computer 3 and the printer 4 can be supplied with electric power. Can also be lengthened. This makes the computer 3
Can know that a power outage has occurred.

In the above example, the available time is notified from the uninterruptible power supply 1 to the computer 3, but the remaining capacity is notified to the computer 3 and the computer 3 calculates and determines the available time. It may be.

[0041]

As described above, according to the uninterruptible power supply according to the present invention, the computer determines the stop processing operation and the stop time of the peripheral device in accordance with the current state according to the remaining capacity of the storage battery or the available time. In addition, since the stop processing operation and the shutdown time of the computer can be determined, the processing at the time of the power failure can be properly performed with a high degree of freedom, and inconveniences such as loss of data during work may occur. Absent.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main configuration of an embodiment of an uninterruptible power supply according to the present invention, and a configuration of a computer system including a computer and a printer.

FIG. 2 is a microcomputer unit 2 according to the embodiment of FIG.
5 is a flowchart showing an algorithm of software for operating the software.

FIG. 3 is a flowchart showing an algorithm of software for operating the computer 3;

FIG. 4 is a view similar to FIG. 1, showing another embodiment of the uninterruptible power supply according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Uninterruptible power supply 2 Microcomputer part 3 Computer 4 Printer 5 Emergency light 11 Rectifier circuit 12 Charging circuit 13 Storage battery 14 Inverter circuit 15 Switch circuit 21 Data acquisition function part 22 Arithmetic processing function part 23 Control function part 24 Communication function part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FIG06F 1/00 341P

Claims (4)

[Claims] A rectifier circuit for rectifying an alternating current supplied from an AC power supply to a direct current, a charging circuit for charging a storage battery with a direct current output from the rectifier circuit, and a direct current output from the rectifier circuit or a direct current from the storage battery. An inverter circuit for converting a DC output to an AC, a switch circuit configured to be able to individually output an AC supplied from the AC power supply or an output of the inverter circuit to a plurality of loads, and a communication for communicating with the outside. Means for outputting an alternating current to the load from the inverter circuit using the storage battery as a power source when a power failure occurs, and operating the switch circuit when the supply of power to the load becomes unnecessary after the power failure occurs, to the load. Control means for stopping the supply of power to the computer, and when the load is a computer and peripheral devices of the computer, An uninterruptible power supply that supplies power required for the computer to perform a shutdown operation and power required for peripheral devices of the computer to perform a shutdown operation to the computer and the peripheral devices when an accident occurs. The control unit includes an operation unit that calculates an available time of a power supply after a power failure occurs or a remaining capacity of the storage battery, and the control unit performs a power failure using the communication unit when a power failure occurs. Notifying the computer of the occurrence and the usable time or the remaining capacity, and operating the switch circuit in accordance with a command notified from the computer through the communication means, thereby controlling the power to the computer and the peripheral device. An uninterruptible power supply characterized by stopping supply. 2. The computer according to claim 1, wherein, when an emergency light is included in the load, the control unit notifies the computer that an emergency light is included in the load when a power failure occurs. The uninterruptible power supply according to the item. 3. A computer, peripheral devices of the computer, and power required for the computer to perform a shutdown operation when a power failure occurs and power required for the peripheral device to perform a shutdown operation. An uninterruptible power supply that supplies the computer and the peripheral device, respectively, wherein the uninterruptible power supply rectifies an alternating current supplied from an alternating current power supply to a direct current, and a storage battery using a direct current output from the rectifier circuit. A charging circuit, an inverter circuit for converting the DC output from the rectifier circuit or the DC output from the storage battery to an AC, and the AC supplied from the AC power supply or the output of the inverter circuit to the computer and the A switch circuit configured to be individually output to a peripheral device, and communication means for performing communication with the outside, When power is generated, the storage battery is used as a power source to output AC from the inverter circuit to the load, and when the power supply to the computer and the peripheral device becomes unnecessary after the power failure occurs, the switch circuit is operated to operate the computer. And control means for stopping supply of power to the peripheral device, and when a power failure occurs, power required for the computer to perform a shutdown operation and power required for the peripheral device to perform a stop operation And a computer system configured to supply the computer and the peripheral device, respectively, wherein the control means of the uninterruptible power supply calculates an available time of power supply after a power failure occurs. And a control unit that, when a power failure occurs, uses the communication unit to determine that a power failure has occurred. The computer is configured to notify the computer of the usable time, operate the switch circuit in response to a command notified from the computer through the communication unit, and stop supplying power to the computer and the peripheral device. Receiving the notification from the uninterruptible power supply that a power failure has occurred, the computer stops the peripheral device within the usable time and issues a command to stop supplying power to the peripheral device. Notifying the power supply device, ending the shutdown operation within the usable time, and notifying the uninterruptible power supply of a command to stop supplying power to the computer after the shutdown operation before the shutdown operation ends. Or shut down operation within the usable time. It said computer system characterized in that it is configured to notify a command to stop power supply to the computer in the uninterruptible power supply after. 4. The load of the uninterruptible power supply includes an emergency light, and the control unit of the uninterruptible power supply determines that when the power failure occurs, the emergency light is included in the load. The computer is configured to notify the computer, and the computer determines the shutdown time of the peripheral device and the shutdown time of the computer in consideration of the fact that the emergency light is included in the load of the uninterruptible power supply. The computer system according to claim 3, wherein: