JPS6316314A - Interface device for no-break power unit - Google Patents

Abstract

PURPOSE:To avoid the software breakage by closing automatically a file even though a service interruption occurs while the file is kept under an opening state. CONSTITUTION:An input terminal 1 is kept at a high voltage level in a normal mode free from a service interruption and therefore no input is given to a fixed width pulse generator 3 with no output delivered to a TXD pin 11 of an RS232C terminal 12. If a service interruption occurs by some reason, the voltage of the terminal 1 is set at a low level and the generator 3 outputs a pulse having the width decided by a capacitor 4 and a resistance 5. meanwhile a code generator 9 is turned on. Then a Baud rate setting device 6 is cleared and the clock signal of a prescribed Baud rate set by a dip switch is outputted to the generator 9. Thus a character code T, for example, is outputted from the pin 11 to perform a process like an 'emergency saving' action, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an interface device for an uninterruptible power supply used with an uninterruptible power supply for a personal computer or the like.

(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, so in order to prevent such a situation, a temporary power supply device has been connected to the commercial power supply. It is now possible to install it between computers. Therefore, many of the above-mentioned problems are likely 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, this is not the case when the operator is not at work, i.e. when operating a computer unattended late at night in an unmanned factory, etc., or even under normal circumstances for a short period of time during operation. There were problems, such as when the operator left his seat. In other words, if a power outage occurs while the operator in charge is away from a computer such as a personal computer, and the power outage continues for a relatively long time, for example 10 minutes or more, even if the power outage occurs, backup As the computer continues to operate in a normal operating state, the battery capacity of the uninterruptible power supply is eventually exceeded and the battery of the uninterruptible power supply is damaged. Furthermore, even if the battery capacity is within the capacity, there is no effect, and battery operation may be uneconomical compared to commercial power supply.

(Problems to be Solved by the Invention) In view of the above, an object of the present invention is to prevent damage to an uninterruptible power supply or the battery of the uninterruptible power supply during unattended operation of a computer, and to The object of the present invention is to provide an interface device for an uninterruptible power supply that is more economical.

(Means for solving the problem) The interface device for the uninterruptible power supply of the present invention inputs the power failure signal output of the uninterruptible power supply to a constant width pulse generator, inputs the output to a code generator, and It is characterized in that the output thereof is output to the R3232C terminal, and the output of the baud rate setting device and a predetermined character code input are input to the code generator.

(Example) Next, an interface device for an uninterruptible power supply according to an embodiment of the present 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 the present invention, and FIG. 2 is a flowchart used in the present invention.

In FIG. 1, l is an input terminal, into which the output of the uninterruptible power supply is input. 2 is a noise cut circuit,
For example, it is composed of a Schmitt circuit. Reference numeral 3 denotes a constant-width pulse generator, which is formed using, for example, a monomulti-bibreak, and whose pulse width is determined by a capacitor 4 and a resistor 5. Reference numeral 6 denotes a baud rate setter, into which the output of the base clock 7 is input. The baud rate setter 6 includes, for example, a binary counter and a dip switch 8. This dip switch 8 is the first
As shown in the figure, one of them is on and all the others are off. For example, 1
200.2400.4800.9600... One of various types such as bow can be selected.

Reference numeral 9 denotes a code generator, which is constructed using, for example, a shift register, and receives the output of the constant width pulse generator 3 and the output of the baud rate setter 6 via a dip switch 8. 10 is a predetermined character code input. 11 is an output terminal,
This uses the TXD pin of R3232C terminal 12.

This R3232C terminal 12 is connected to the R3232C specification connector of the computer via another cable.

(Operation) The operation of the interface device for the uninterruptible power supply according to the present invention, which is constructed as described above, will now be described.

The interface device for an uninterruptible power supply according to the present 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 the uninterruptible power supply, the interface device of the uninterruptible power supply of the present invention, and then the computer, but at this point, when the commercial power supply fails, the device of the present invention is used. Before explaining, we will first explain the case of a normal state without a power outage. That is, the input terminal l is connected to the uninterruptible power supply, and more specifically, it is connected to the output side of the power failure detection circuit of the uninterruptible power supply, but in this state, the input terminal l is in a high voltage state, so There is no input to the constant width pulse generator 3, and no output to the TXD pin 11 of the R5232C terminal 12. This R5232G terminal 2 is connected to a personal computer as described above, and a program as shown in Fig. 2 is given to this personal computer using software.
Since there is no output to the TXD bin 11 of Moe, there is no interrupt, and therefore normal processing 13 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 output a pulse with a width determined by the capacitor 4 and resistor 5, and during this pulse width, the code generator 9 will be activated. Turns on. On the other hand, the baud rate setter 6 is cleared by the output of the constant width pulse generator 3, and a clock signal of a predetermined baud rate set by the dip switch is input to the code generator 9. In this way, a character code, for example, "°T", is output from the code generator 9, and is then output from the TXD pin II.

When there is a power outage output as described above, the program shown in FIG. 2 in a computer such as a personal computer displays messages such as "power down" and "emergency evacuation" on the CRT, and then closes the file.

(Effects of the Invention) The interface device of the uninterruptible power supply of the present invention is configured as described above, and even if a power outage occurs while a file is open or in the middle of processing, the file is automatically closed. Then, after the file is closed, the operation of the computer is stopped without any problem as soon as possible, so computers such as personal computers can be operated unattended without destroying the software.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a first embodiment of an interface device for an uninterruptible power supply according to the present invention, and FIG. 2 is a flowchart thereof. In the drawing, ■ - input terminal, 3 - constant width pulse generator, 6 - baud rate setter, 9 - code generator, 10
...R5232C terminal.

Claims (1)

[Claims] Input the power failure signal output of the uninterruptible power supply to a constant width pulse generator, input the output to a code generator, and output the output to the RS232C terminal, as well as input the output of the baud rate setting device and a predetermined character code. is input into the code generator.