JPH0517705Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to an interface device for an uninterruptible power supply used for an uninterruptible power supply such as a personal computer.

(Prior art) Conventionally, if a power outage occurs in the commercial power supply while a computer such as a personal computer is in operation, the computer software or program will be destroyed. It has become possible to deal with this problem by installing it between the two. Therefore, there is a tendency for many of the above-mentioned problems to be solved. In other words,
If an uninterruptible power supply is used and the operator is on duty, there will be fewer problems even if a power outage occurs.

However, the above situation is not the case, when the computer is operated unattended when the operator is not at work, such as late at night in an unmanned factory, or even in normal cases, when the computer is temporarily operated for a short period of time during operation. There was a problem when the operator left his seat. In such cases, if a power outage occurs while the operator in charge is away from the computer, etc., and the power outage continues for a relatively long time, for example 10 minutes or more, even a power outage may result in a backup. As the computer continues to operate normally, problems arise in that the battery capacity of the uninterruptible power supply is exceeded and the battery of the uninterruptible power supply is damaged. Also, even if the battery is within the capacity, there is no effect, and battery operation may be uneconomical compared to using a commercial power source.

(Problems to be solved by the invention) In view of the above, the purpose of the invention is to prevent damage to the battery of an uninterruptible power supply under unattended operation of a computer such as a personal computer, and to make the use of the battery economical. The objective is to provide an environment in which an uninterruptible power supply with improved performance can be used.

(Means for solving the problem) The interface device of the uninterruptible power supply of the present invention inputs the power failure signal output of the uninterruptible power supply to the multivibrator, inputs the output to the shift register, and further inputs the output is output to the RS-232C terminal, and the output of the baud rate setter and the code input are input to the shift register.

(Example and operation) Next, an interface device for an uninterruptible power supply according to an embodiment of this invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an interface device for an uninterruptible power supply according to an embodiment of this invention, and FIG. 2 is a flowchart used in this invention.

In FIG. 1, 1 is an input terminal, into which the output of the uninterruptible power supply is input. Reference numeral 2 denotes a noise cut circuit, which is composed of, for example, a Schmitt circuit. 3 is a constant width pulse generator, which is formed using, for example, a monomultivibrator;
The capacitor 4 and resistor 5 determine the pulse width. 6 is a constant width pulse generator similar to the above, and the pulse width is similarly determined by the capacitor 7 and resistor 8. Reference numeral 9 is a baud rate setter to which the output of the reference clock 10 is input.
The baud rate setter 9 is composed of, for example, a binary counter and a dip switch 11. This deep switch 11, as shown in FIG.
Some of them are on, and many of them are all off. With this, for example 1200,
You can select from various types such as 2400, 4800, 9600...Baud. Reference numeral 12 denotes a code generator, which is constructed using, for example, a shift register, to which the outputs of the constant width pulse generators 3 and 6 are input, and the output of the baud rate setter 6 is input via the dip switch 11. 13 is a predetermined character code input. 1
4 is an output terminal, 15 is an input terminal, and these are the TXD pin and RXD pin of RS-232C terminal 16.
Use pins. This RS-232C terminal 16 is connected to an RS-232C specification connector of a computer via the cable.

The operation of the interface device for the uninterruptible power supply of this invention, which is constructed as described above, will now be described.

The uninterruptible power supply interface device of this invention is used by being connected between a separate uninterruptible power supply and a computer such as a personal computer. That is,
Each device is connected in the order of uninterruptible power supply → interface device of the uninterruptible power supply of this invention → computer, but if the commercial power supply fails here and the equipment of this invention is used. Before explaining, we will first explain the case of a normal state without a power outage. That is, input terminal 1 is connected to the uninterruptible power supply, and more specifically, it is connected to the output side of the power failure detection circuit of this uninterruptible power supply, but in this state, input terminal 1 is in a high voltage state, and However, there is no input to constant pulse generator 3, and RS-232C terminal 1
6's TXD pin 14 has no output. This RS−
As mentioned above, the 232C terminal 16 is connected to a personal computer, etc., and the program shown in Figure 2 is given to this computer by software, etc., but as shown above, the TXD pin 14 has no output. So,
There is no interruption, so normal processing 17 is executed.

If a power outage occurs here, the input terminal 1 will be in a low voltage state, and the constant width pulse generator 3 will be connected to the capacitor 4.
The code generator 1 outputs a pulse with a width determined by the resistor 5, and the code generator 1 outputs a pulse with a width determined by the resistor 5.
2 is turned on. On the other hand, the constant pulse generator 3
The output is input to the baud rate setter 9 through a logic circuit, the setting is cleared, and a clock signal of a predetermined baud rate set by the dip switch is input to the code generator 12. Due to the functions of each of the above configurations, the code generator 12 outputs a character code such as "T", and the RS-232C terminal outputs a character code such as "T".
Output from TXD pin 14. If the program shown in the flowchart in Figure 2 is activated in a computer such as a personal computer by the power outage output from the device of the present invention as described above, displays such as "Power Down" and "Emergency Evacuation" will be displayed on the CRT. , and then close the file. In addition, since the computer is connected to the RS-232C terminal, the RS-232C receiving terminal (RXD
The completion of the evacuation of the computer can be outputted to the invented device as a character code to the pin 15), and this output makes it possible to end the backup of the uninterruptible power supply.

(Effects of the invention) The interface device of the uninterruptible power supply of the invention is configured as described above, and provides the necessary signals to the computer to terminate its operation in the event of a power outage while the computer is running unattended. This makes it possible to prevent damage to the battery of the uninterruptible power supply and improve economic efficiency when using the battery, and to prevent power outages in a system consisting of an uninterruptible power supply and a computer that have different usage conditions. It has the effect of overcoming obstacles.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of an interface device for an uninterruptible power supply of this invention, and FIG. 2 is a flowchart of the same. In the drawings, 1...input terminal, 3...constant width pulse generator, 6...constant width pulse generator, 9...
...Baud rate setter, 12...Code generator, 1
6...RS-232C terminal.

Claims (1)

[Scope of utility model registration request] Input the power failure signal output of the uninterruptible power supply to the multivibrator, input the output to the shift register, and output the output to the RS-232C terminal.
An interface device for an uninterruptible power supply, characterized in that the output of the baud rate setter and the code input are input to the shift register.