JPH07219686A - Power supply device - Google Patents

Abstract

PURPOSE:To stabilize a service interruption process and a service recovery process by generating a service interruption signal when the power source is OFF for rather a short time or longer and generating a service recovery signal when the power source is ON for a rather long time. CONSTITUTION:A backup power source 5 inputs AC primary electric power showing an ON/OFF state, secondary backup electric power is supplied to respective devices 1, 2 and 3, and the ON/OFF state of the primary electric power of the backup power source 5 is inputted to a power source state output device 4. Then the service interruption signal and service recovery signal based upon the ON/OFF state of the primary electric power and outputted from the power source state output device 4 to a bus L. The backup power source 5 supplies the backup electric power to other devices only for a specific time T1 which is long enough for a saving process. When, however, the primary electric source, however, is turned OFF within a specific time T2 shorter than the specific time T1 and turned ON, the secondary power source generates an output in this OFF period to maintain the ON state, and service interruption processing operation is performed by the respective devices 1, 2 and 3, so that no confusion is caused.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for backing up a power supply for electronic equipment for process control.

[0002]

2. Description of the Related Art Conventionally, in an electronic device such as a personal computer, for example, a backup power supply which continuously supplies power when a power failure occurs while an internal CPU is accessing a file in its memory. There is a device.

[0003]

However, the power supply is simply backed up, and many power failure signals and power recovery signals are not output to the outside. For this reason, when many devices are connected by a bus for process control, each device does not know when the power is cut off and the power is restored, and the power restoration process is also disjointed, resulting in ununiform data held by each device. There was a point. In addition, if a power failure signal is immediately output for a momentary power failure (a momentary power failure) such as noise to perform power failure processing, there is a risk that the system may be confused.

In view of the above points, an object of the present invention is to provide a power supply device capable of stably performing power failure and power recovery.

[0005]

The present invention provides a backup power supply capable of supplying a secondary power supply for backup for a first predetermined time to another device when the primary power supply is off,
When the on / off state of the primary power supply of this backup power supply is input and the primary power supply is off for a second predetermined time shorter than the first predetermined time, a power failure signal is output to another device and the primary power supply is turned on. At this time, the power supply device is provided with a power supply status output device that outputs a power recovery signal to another device.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

In the drawing, an input device 1, an output device 2, and a bus L such as a common network as a transmission line are provided.
A display operation device 3 such as a personal computer, a power status output device 4 to which a backup power supply 5 is connected, and the like are connected. The primary power source is input to the backup power source 5, and the secondary power source for backup is supplied to the input device 1, the output device 2, the display operation device 3, etc. as other devices, and the primary power source is turned on and off. The status is output to the power status output device 4.

The input device 1 takes in data such as temperature input from the outside and, after performing necessary processing such as linearization, adds an output number indicating its own self to the data. Is output to the bus L.

The output device 2 sets the output number of the output data of the required device as the capture number, and captures the data having the number from the data flowing through the bus L. When the output number of the input device 1 is the take-in number of the output device 2, the data of the input device 1 is taken into the output device 2 through the bus L and output to the outside. A plurality of these devices are provided and take in data from the bus L and perform arithmetic processing on the bus L.
A device such as an arithmetic unit for outputting to is also connected.

The display operation device 3 takes in measurement data of various devices flowing through the bus L, setting information, etc., displays a trend on the display screen, creates a menu screen, and performs necessary management operations. .

In the system as described above, each device is backed up by the backup power supply 5, and its operation will be described with reference to FIG.

To the backup power source 5, an AC power source, which is in an on / off state in FIG. 2 (a), is input as a primary power source,
A secondary power supply for backup as shown in FIG. 2B is supplied to each of the devices 1, 2 and 3, and the on / off state of the primary power supply of the backup power supply 5 is input to the power supply status output means 4. Then, a power failure signal and a power recovery signal based on the on / off state of the primary power source shown in FIG. 2C are output from the power state output device 4 to the bus L. Then, the backup power source 5 has a predetermined time T1 necessary for the evacuation process.
The backup power is supplied to other devices for (for example, 5 seconds) minutes. The predetermined time T1 may be a time when the battery is backed up or a preset time.

(1) First, the primary power source is turned on for the predetermined time T1.
If the power is turned off and turned on within a predetermined time T2 (for example, 1 second) shorter than that, the secondary power supply generates an output and keeps on during this off, and the power status output device 4 outputs no power failure signal. A power recovery signal is not generated on the bus L, and a momentary power failure due to a sudden noise or the like does not cause confusion by unnecessarily causing each of the devices 1, 2, and 3 to perform a power failure processing operation.

(2) Next, when the primary power source is off for T2 hours or more and within T1 hours, the primary power source is off for 2 hours.
Next power is generated and power is supplied to each of the devices 1, 2, and 3.
In this case, since the power failure may last for a long time, the power supply status output device 4 outputs a power failure signal to the bus L when the time T2 elapses, and causes each of the devices 1, 2 and 3 to perform the power failure process. However, if the primary power supply is restored within T1 hours,
Output the power recovery signal to the bus L, and
Notify that the power supply is normal and perform necessary power recovery processing.

(3) Also, when the primary power source is turned off for more than T1 hours, the secondary power source is generated in response to the primary power source being turned off, and when the time T2 has passed, the power state output device 4 outputs a power failure signal to the bus L, and the other device 1,
A few saves required parameters and data, etc. Then, when the turn-off of the primary power source reaches the time T1, the secondary power source is turned off. Within a time period T1 of these several seconds, each device can sufficiently complete necessary parameters and data saving operation for power failure. Then, when the primary power supply is turned on, the power status output device 4 generates a power recovery signal on the bus L, and each device 1,
In steps 2 and 3, the necessary power recovery processing or reset processing is performed, and the overall operating state is normal.

The primary power ON / OFF signal for the display operation device 3 and the like, the power failure signal and the power recovery signal of the power status output device 4 may be directly input without the bus L. Good.

[0017]

According to the present invention, in a power supply device that backs up for a predetermined time, a power failure signal is generated when the power is off for a little shorter time, and a power recovery signal is generated when the power is turned on by a slightly longer time. It is something that is done. Therefore, even if there is a momentary power failure due to a temporary noise or the like, it is backed up and a special power failure signal is not generated, so that the device or system is not unnecessarily confused. Also, after a power failure signal is generated and each device performs power failure processing such as saving necessary parameters and data, a power recovery signal is always generated when the power is turned on.
Each device can perform the necessary power recovery process and does not confuse the system. In addition, a power failure signal and a power recovery signal are simultaneously generated for each device via the bus, and at the same time, power failure processing,
Since power recovery can be performed, the simultaneity of the device and the system can be kept extremely good, and the safety and reliability are further improved. Also, the backup time of the backup power supply is only a few seconds required for evacuation, etc., so it is compact and inexpensive.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 input device 2 output device 3 display operation device 5 backup power supply L bus

Claims (2)

[Claims] 1. A backup power supply capable of supplying a secondary power supply for backup to another device for a first predetermined time when the primary power supply is off, and an input of an ON / OFF state of the primary power supply of the backup power supply. A power supply state in which a power failure signal is output to another device when the primary power supply is off for a second predetermined time shorter than the first predetermined time, and a power recovery signal is output to another device when the primary power supply is turned on A power supply device comprising an output device. 2. The power supply device according to claim 1, wherein the power supply status output device outputs a power failure signal or a power recovery signal through the bus to another device connected to the common bus.