JP2994519B2 - Power control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power control device,
In particular, the present invention relates to a power supply control device for performing power-off control when a power supply switch is turned off in a personal computer, a word processor, a facsimile machine, a printer, or the like.

[0002]

2. Description of the Related Art A personal computer, a word processor, a facsimile machine, a printer, and the like are provided with a power supply unit so that an AC 100 V is converted into a predetermined DC voltage and supplied to a control unit and a storage unit. Has become. FIG. 12 is an explanatory view of a conventional power supply control. 1 is a control unit having a microcomputer configuration, 2 is an external storage device such as a hard disk,
Is a power supply unit, 3a is input of AC100V, and a predetermined DC
A power supply circuit for generating a voltage (for example, +5 V, +12 V, etc.) and inputting it to the control unit 1 or the external storage device 2 is a main line switch (breaker) for turning on / off the AC line. When a control is performed by inputting a DC voltage to the control unit 1, the main line switch 4 is turned on and the AC1
00V is input to the power supply circuit 3a. Thereby, the power supply circuit 3a inputs the DC voltage to the control unit 1, and the control unit 1 can control. When the input of the DC voltage to the control unit 1 is stopped and the control is terminated, the main line switch 4 is turned off.

FIG. 13 is another explanatory diagram of the conventional power supply control, and the same parts as those in FIG. 12 are denoted by the same reference numerals. FIG.
The difference from the second embodiment is that the power can be turned off by transmitting a power-off signal POF from the control unit 1 to the power unit 3 in addition to turning on / off the power using the main line switch 4. For example, when a power-off instruction is given from a keyboard (not shown), the control unit 1 performs a power-off control process and inputs a power-off signal POF to the power supply unit 3 to turn off the power. FIG. 14 is still another explanatory diagram of the conventional power supply control, and the same parts as those in FIG. 12 are denoted by the same reference numerals. The difference from FIG. 12 is that a power switch 5 is provided on the power supply unit side, and the power switch 5 is turned on and off to control turning on and off of the power. That is, when the power switch 5 is turned on (the main line switch is turned on), the power supply circuit 3 a
The voltage is output to the control unit 1. Further, the power supply circuit 3a does not cut off the DC voltage immediately after the power switch 5 is turned off, and transmits a switch-off signal SOF to the control unit 1. Control unit 1
Receives the switch-off signal, performs a power-off control process (for example, a process being executed), and then performs a power-off signal PO.
F to the power supply unit 3 and the power supply circuit 3a
To turn off the power.

[0004]

In the system shown in FIGS. 12 and 13, while the controller 1 is writing data to an external storage device such as a hard disk drive or a floppy disk drive, the main line switch 4 is not used. If the power is turned off due to an erroneous operation, normal writing cannot be performed (writing ends in the middle of one sector), and the next time the power is turned on, the external storage device becomes abnormal. In the system shown in FIG. 14, since the power switch 5 is provided, the operator does not use the main line switch 4 but uses only the power switch 5 to turn off and on the power. Therefore, in order to cut off the power after performing the control processing for turning off the power, FIGS.
The problems in the above method are reduced. However, if the control unit 1 becomes abnormal at the time of power-off, there is a problem that the power-off signal POF cannot be transmitted to the power supply circuit 3a and the power cannot be turned off.

From the above, the object of the present invention is to provide
For example, it is an object of the present invention to provide a power supply control device in which a disk error does not occur at power-on even if a power switch is inadvertently turned off during operation of writing data to an external storage device by an operator or the like. Another object of the present invention is to provide a power supply control device capable of reliably turning off the power even if the control unit becomes abnormal when the power is turned off. Still another object of the present invention is to measure the elapsed time after the power switch off signal is generated, and cut off the power when the elapsed time reaches a predetermined time, thereby reliably turning off the power even if the control unit becomes abnormal. It is to provide a power supply control device which can be used. Another object of the present invention is to prevent the power from being cut off when the set time has elapsed when the power-off preparation process to be executed after the power switch is turned off is long, and to execute all of the long power-off preparation process. An object of the present invention is to provide a power supply control device capable of turning off the power supply after the power supply is turned off. Another object of the present invention is to divide a process into a plurality of processes that do not cause any inconvenience, check the presence or absence of a power switch off signal after executing each of the subdivided processes, and determine whether a power switch is turned off. Provided is a power supply control device that can immediately turn off the power in subdivided units even in the middle of processing, and can recognize that “the power has been cut off during processing” when turning on the power, and can take a predetermined measure. That is. Still another object of the present invention is to save information to be used at the next power-on (information to be continued) before power-off, and to recover at power-on, as if power-on is continued. The purpose of the present invention is to provide a power supply control device that can be configured as follows.

[0006]

FIG. 1 is a diagram illustrating the principle of the present invention. Reference numeral 11 denotes a control unit having a microcomputer configuration, 13 denotes a power supply unit, 13a denotes a power supply circuit that receives AC100V and generates a predetermined DC voltage and inputs the same to the control unit 11, 13b denotes a power supply switch-off, and a control unit prepares for power-off. A power-off request signal generator 15 that outputs a power-off request signal POF (CPB, TPB) after the processing is completed or after a predetermined time has elapsed after the power switch is turned off, is a power switch. 13b-1 is a timer, and 13b-2 is an OR gate.

[0007]

When the power switch is turned off, the power supply unit inputs a switch-off signal to the control unit.
Control unit 11 performs a predetermined power-off preparation process based on switch-off signal SOF, and then outputs power-off signal CPB. As a result, the power-off request signal generator 13b inputs the power-off request signal POF to the power circuit 13a, and turns off the power. Further, the timer 13b-1 outputs the switch-off signal SO.
The elapsed time after the occurrence of F is counted, and when the elapsed time reaches a predetermined time, a power-off signal TPB is output. As a result, the power-off request signal generator 13b inputs the power-off request signal POF to the power circuit 13a, and turns off the power. As described above, even if the power switch is turned off, the power is not turned off immediately, and the power is turned off after the power-off preparation processing (for example, the currently executing data writing processing) is completed. Therefore, the power switch is operated during the processing. Even if the power is turned off inadvertently, no error occurs at the next power-on. Further, even if an abnormality occurs in the control unit 11 and the power cutoff signal CPB cannot be output,
The power supply can be reliably turned off after a predetermined time.

Further, when a power switch is turned off, a power-off mask signal is output to output a power-off signal T based on an elapsed time (timer).
The PB is invalidated, and after a predetermined power-off preparation process is completed, the power-off signal CPB is output to turn off the power. In this way, it is possible to prevent the power from being turned off even if the elapsed time reaches the set time before the power-off preparation processing is completed. can do. Further, by performing processing for storing information (format setting information, abnormal state information, and the like) to be continued when the power switch is turned on next as power-off preparation processing, it is as if power-on is continued. be able to. Also, by the control unit,
Set processing start information before starting processing,
After the processing is completed, processing end information is set, and the processing is subdivided into a plurality of processings that do not cause inconvenience. After execution of each subdivided processing, the presence or absence of a power switch off signal is checked, and a switch off signal is checked. If there is, a power-off request signal is output, and when the power is turned on again, it is checked whether the processing start information is set, and if it is set, it is considered that the power switch is turned off during the processing, and the processing is performed. To disable. This makes it possible to quickly turn off the power even if the power switch is turned off during execution of a long process.

[0009]

【Example】

(a) Overall configuration of the first embodiment FIG. 2 is a configuration diagram of the first embodiment of the present invention. Reference numeral 11 denotes a control unit having a microcomputer configuration, 12 denotes an external storage device such as a hard disk, and 13 denotes a D to the control unit 11 and the external storage device 12.
A power supply unit for supplying the C voltage, 14 is a main line switch (breaker) for turning on / off the AC line, and 15 turns on / off the DC voltage supply when 100 V AC is supplied from the AC line to the power supply unit. Power switch, 1
Reference numeral 6 denotes a portion controlled by the control unit 11, which is, for example, a printer mechanical unit (including a mechanical controller).

The control section control section 11 has a microcomputer configuration and performs various processes according to a program (firmware). In addition, a signal (switch-off signal SO) necessary for power supply control with the power supply unit 13 through an input / output port (not shown).
F, a power cut-off signal CPB), and data exchange with the external storage device 12 and the host device via the interface. 11a is a register for storing a switch-off signal SOF indicating the on / off state of the power switch 15 sent from the power supply unit 13, and 11b is a register for writing out a power-off control processing function among various controls performed according to firmware (power supply). Disconnection control processing unit).

In the power supply section 13, a power supply circuit 13a is supplied with AC100V, generates a predetermined DC voltage and is supplied to the control section 11 and the external storage device 12, and a power supply circuit 13b outputs a power-off request signal POF. This is a power-off request signal generation unit. The power-off request signal generator 13b is connected to the timer 13b-1
When the power-off preparation process is completed by the control unit 11 and the power-off signal CPB is output, or the power-off signal TPB is output from the timer after a lapse of a predetermined time T after the power is turned off. Power-off request signal POF
To the power supply circuit 13a. The time T is set to be longer than the power-off preparation processing time by the control unit 11.

[0012] In a state where the entire operation mainline switch 14 is AC100V turned on is input to the power supply circuit 13a, a power switch 1
When the power supply 5 is turned on, the power supply circuit 13a immediately supplies the DC voltage to the control unit 11, the external storage device 12, and the like. Such DC
When the power switch 15 is turned off in the voltage supply state, the power supply unit 13 inputs the switch-off signal SOF to the control unit 11 via the cable LN1, and writes the power switch-off information to the register 11a. Power switch 15
Switch-off signal SOF is input to the timer 13b-1.
The elapsed time after the power switch is turned off is measured. Control unit 1
When the power switch-off information is written in the register 11a, the power-off signal CPB is output to the power-off request signal generator 13b via the cable LN2 after performing a predetermined power-off preparation process. When the power-off signal CPB is input, the power-off request signal generator 13b inputs the power-off request signal POF to the power circuit 13a. The power supply circuit 13a cuts off the supply of the DC voltage as soon as the power-off request signal POF is input.

FIG. 3 is a flowchart of a power-off signal generation process by the control unit 11. Register 11a in place of program
Is inserted to determine whether the power switch 15 has been turned off by reading the contents of
1, 102), if the power switch is not turned off, the normal processing inherent to the control unit is performed (step 103). However, if the power switch 15 is off at the time of the determination in step 102, the power-off preparation processing is executed (step 10).
4). For example, it executes the processing that was being performed when the power switch was turned off (the processing of writing data to the hard disk 12, the processing of printing to a serial printer, etc.). When the data write operation or the print operation is completed and the power-off preparation process is completed (step 105), the power-off signal CPB is output to the power supply unit 13 and the process is terminated (step 106).

The above description is for the case where the control unit 11 and the cables are normal. However, when the hardware and firmware of the control unit 11 are defective, or when the cables LN1 and LN2 are faulty, The control section 11 cannot output the power cutoff signal CPB. In such a case, the power-off signal TPB is output from the timer 13b-1. That is, the timer 13b-
1 measures the elapsed time after the generation of the switch-off signal SOF, and when the elapsed time reaches a predetermined time, the power-off signal TPB
Is output. Thereby, the power-off request signal generator 13b
Inputs the power-off request signal POF to the power supply circuit 13a via the gate 13b-2, and turns off the power. From the above,
Even if the power switch 15 is turned off, the power is not turned off immediately, and the power is turned off after the power-off preparation processing (for example, the currently executing data writing processing) is completed. Even if inadvertently turned off, no error occurs at the next power-on. Further, even if an abnormality occurs in the control unit 11 and the power cutoff signal CPB cannot be output,
Since the power-off signal TPB can be output after a predetermined time from the timer 13b-1, the power can be reliably turned off.

Example of Power-Off Preparation Processing In FIG. 3, the processing when the power switch 15 is turned off (for example, processing for writing data to a hard disk) is executed as the power-off preparation processing. However, the power-off preparation processing is not limited to such a case. FIG. 4 shows an example in which information to be continued when the next power switch is turned on is stored as a power-off preparation process, and the same parts as those in the processing flow of FIG. 3 are denoted by the same reference numerals. When the power switch 15 is turned off (YES in step 102), the information to be continued, for example, the printing format, printing conditions, etc., or the status of each part is stored in a non-volatile memory such as a hard disk (step 104 '). After the storage, the power supply cutoff signal TPB is output to cut off the power supply (step 106). When the power switch 15 is turned on, the stored information is read out from the non-volatile memory and is restored to the RAM (step 211). Thereafter, normal processing is performed using the restored information (step 112).

As described above, information to be continued when the power switch 15 is turned off (format setting information, abnormal state information, etc.).
Is saved, so that it is as if the power was continuously turned on. By doing so, even if the device itself repeatedly turns off and on the power to save power consumption (the host device remains powered on), inconsistency may occur between the device and the host. Absent. For example, considering the case of a personal computer and a printer, the personal computer makes a certain setting (for example, the line feed amount is reduced to 1/8 inch), the printer normally receives the setting, and the setting data is hardened when the power switch 15 is turned off. Power is turned off after saving the data in a non-volatile memory such as a hard disk. Then, when the power switch 15 is turned on, the stored set amount is restored and normal processing is performed. The continuation information writing process 104 'in FIG. 4 may be arranged in series after the power-off preparation process 104 in FIG.

(B) Second Embodiment of the Present Invention FIG. 5 is a block diagram of a second embodiment of the present invention.
The same reference numerals are given to the same parts as in the embodiment. 5 is different from the embodiment of FIG. 2 in that a power-off request signal generator 13b is provided in the controller 11, and a power-off request signal POF is input to a power supply circuit 13a via a cable LN2. Yes, others are the same. 5, there is an advantage that the power supply unit 13 can have the same configuration as the conventional power supply unit (see FIG. 14).

(3) Third Embodiment of the Present Invention FIG. 6 is a block diagram of a third embodiment of the present invention. First of FIG.
The same reference numerals are given to the same parts as in the embodiment. The difference from the first embodiment is that the power-off control processing section 11b outputs the power-off signal CPB and outputs the power-off mask signal PBM for masking (invalidating) the power-off signal TPB by the timer 13b-1. The power-off request signal generator 13b supplies a power-off mask signal P
AND gate 13b- which disables the power-off signal TPB at the BM
3 is provided. That is, when the power switch 15 is turned off, the power-off mask signal PMB is output, the power-off signal TPB based on the elapsed time (timer) is invalidated, and after the predetermined power-off preparation processing is completed, the power-off signal CPB is output. Turn off the power. In this way, if the power-off preparation process executed after the power switch 15 is turned off is long, the power-off can be prevented from being performed even if the elapsed time reaches the set time T before the power-off preparation process ends. Even if it is a long power-off preparation process, the power can be turned off after executing all.

Overall Operation When the main line switch 14 is turned on and 100 VAC is input to the power supply circuit 13a, the power switch 1 is turned on.
When the power supply 5 is turned on, the power supply circuit 13a immediately supplies the DC voltage to the control unit 11, the external storage device 12, and the like. Such DC
When the power switch 15 is turned off in the voltage supply state, the power supply unit 13 inputs the switch-off signal SOF to the control unit 11 via the cable LN1, and writes the power switch-off information to the register 11a. Power switch 15
Switch-off signal SOF is input to the timer 13b-1.
The elapsed time after the power switch is turned off is measured. Control unit 1
When the power switch-off is detected by writing the power switch-off information to the register 11a, the key 1 is activated.
A high-level ("1") power-off mask signal PBM is output to the LBL3. As a result, the "inhibit" terminal of the AND gate 13b-3 of the power-off request signal generating section 13b is connected to "inhibit terminal".
"1" is input, and the gate 13b is closed.
The gate is closed until the power-off mask signal PBM becomes low level ("0"), and the power-off signal TPB output from the timer 13b-1 is masked.

After outputting the power-off mask signal PBM, the control unit 11 executes a predetermined power-off preparation process. When the process is completed, the power-off mask signal PBM is set to low level ("0") to release the mask. . Next, the controller 11 inputs the power-off signal CPB to the power-off request signal generator 13b via the cable LN2. Power-off request signal generator 13
b turns the power-off signal CPB into a power-off request signal POF via an OR gate 13b-2 and an AND gate 13b-3 and inputs the signal to the power supply circuit 13a. The power supply circuit 13a cuts off the supply of the DC voltage as soon as the power-off request signal POF is input. The above is the case where the control unit 11 and the cables are normal. However, when the hardware or firmware of the control unit 11 is defective or when the cables LN1 and LN2 are faulty, the control unit 11 This makes it impossible to output the power-off mask signal PBM or the power-off signal CPB. In such a case, the power-off signal TPB is output from the timer 13b-1.
That is, the timer 13b-1 measures the elapsed time after the generation of the switch-off signal SOF, and outputs the power-off signal TPB when the elapsed time reaches a predetermined time. Thus, the power-off request signal generator 13b inputs the power-off request signal POF to the power circuit 13a via the gate 13b-2 and turns off the power.

FIG. 7 is a flowchart of a power-off control process by the control unit 11. A judgment process for reading the contents of the register 11a and judging that the power switch 15 has been turned off is inserted at an appropriate place in the program (step 201,
202), if the power switch is not turned off, the normal processing inherent to the control unit is performed (step 203). However, if the power switch 15 is off at the time of the determination in step 202, the power-off mask signal PBM is output (step 2).
04). Thus, as described above, the AND gate 13b-3 is closed until the power-off mask signal PBM becomes "0", and the power-off signal TPB output from the timer 13b-1 is masked. After outputting the power-off mask signal PBM, the control unit 11 executes a predetermined power-off preparation process (step 205,
206), when the processing is completed, the power-off mask signal PB
The mask is released by setting M to low level ("0") (step 207). Next, the control unit 11 inputs the power-off signal CPB to the power-off request signal generating unit 13b (Step 208), and turns off the power.

The processing in FIG. 7 is performed when the power-off preparation processing executed after the power switch 15 is turned off is long. When the power-off preparation processing executed after the power switch 15 is turned off is short, the power-off mask is used. The processing according to FIG. 3 or FIG. 4 is performed without outputting the signal PBM. As described above, when the power-off preparation processing executed after the power switch 15 is turned off is long, it is possible to prevent the power-off even if the elapsed time reaches the set time T before the power-off preparation processing ends. Even in the preparation process, the power can be turned off after all the processes are executed. Further, even if an abnormality occurs in the control unit 11 and the power-off mask signal PBM or the power-off signal CPB cannot be output, the power-off signal TPB can be output after a predetermined time from the timer 13b-1. .

[0023] Another configuration diagram 8 of a power-off request signal generating unit 13b is an alternative embodiment block diagram of a power-off request signal generation unit 13b. The power-off signal TPB output from the timer 13b-1 is masked (disabled) by the AND gate 13b-4, and the logic of the output signal of the AND gate 13b-4 and the power-off signal CPB output from the control unit 11 is masked. The sum is calculated by an OR gate 13b-5 to obtain a power-off request signal POF, and the power-off request signal POF is input to the power supply circuit 13a.

(D) Fourth Embodiment of the Present Invention FIG. 9 is a block diagram of a fourth embodiment of the present invention.
The same reference numerals are given to the same parts as in the embodiment. 9 is different from the embodiment of FIG. 6 in that a power-off request signal generator 13b is provided in the controller 11, a power-off request signal POF is generated from the controller 11, and is input to the power supply circuit 13a. The power-off mask signal PBM and the power-off signal CPB are output from the host device 10 of the control unit 11 to the control unit 11; When the power switch 15 of a device (for example, a printer) connected to the personal computer (host device) 10 is turned off, the switch-off signal SOF of the power switch 15 is notified to the personal computer 10. In response to this notification, the personal computer 10 immediately outputs the power-off mask signal PBM to the control unit 11 and outputs the timer 13b-1
(Disable) the power cutoff signal TPB due to the above. Thereafter, the personal computer 10 executes a predetermined power-off preparation process. When the process is completed, the power-off mask signal PBM is set to low level ("0") to release the mask. Then, the personal computer 10 sends the power-off signal CPB to the control unit 11, and the power-off request signal generating unit 13b outputs the power-off request signal POF.
Is input to the power supply circuit 13a to turn off the power.

The above is a case where the personal computer 10, the control unit 11, and the cables LN1 'to LN3' are normal. However, when an abnormality occurs in the personal computer 10 or the like, the power cut mask signal PBM or the power cut signal CPB is transmitted to the control unit. 11 cannot be output. In such a case, the power-off signal TP is output from the timer 13b-1.
B is output and the power is turned off. That is, the timer 13b-
1 measures the elapsed time after the generation of the switch-off signal SOF, and when the elapsed time reaches a predetermined time, the power-off signal TPB
Is output. Thereby, the power-off request signal generator 13b
Inputs the power-off request signal POF to the power supply circuit 13a through the gate 13b-2 and the AND gate 13b-3, and turns off the power. As described above, when the power supply is controlled by the host device (personal computer) or the like, even if a failure occurs in the host device such as the personal computer, the power can be reliably turned off by turning off the power switch.

(E) Fifth Embodiment of the Present Invention The power-off preparation processing by the control unit 11 (see FIG. 6) after the power switch is turned off may take longer than usual processing. For example, in order to improve performance, cache data (bit image character data) is stored in a RAM built in the control unit.
This is a process of writing data from a cache (not shown) to the disk cache area of the hard disk 12. If the power switch 15 is turned off during the writing process to the disk cache, it takes a long time until the power is turned off by the power-off signal CPB in the third embodiment of FIG. Although the power is turned off, the power is not cut off, giving the operator an uneasy or strange feeling.

FIGS. 10 and 11 are flowcharts of the processing of the control unit 11 for turning off the power at processing breaks that do not cause inconvenience even if all processing is not completed. It is assumed that the hardware configuration is the same as that of the first embodiment shown in FIG. Prior to the start of the processing requiring a long time, the control unit 11 checks whether the power switch-off information is written in the register 11a (step 301), and if it is, the power-off signal CPB is cabled. The signal is output to the power-off request signal generator 13b via the LN2, and the power is turned off (step 302). If the power switch-off information is not written in the register 11a, the long-time processing start flag is set in a predetermined block of the hard disk (step 30).
3) Then, it is checked whether the power switch off information is written in the register 11a (step 304).
If it has been written, the power supply cutoff signal CPB is output to turn off the power (step 302).

If the power switch-off information is not written in the register 11a, the first processing which has been divided into a plurality of units in a unit which does not cause any inconvenience is executed in advance (step 30).
5) After execution, it is checked whether the power switch off information is written in the register 11a (step 306),
If it has been written, the power supply cutoff signal CPB is output to turn off the power (step 302). If the power switch-off information has not been written in the register 11a, the second process, which has been divided into a plurality of units in advance in which no inconvenience occurs, is executed (step 307). If the power switch is not turned off, the subdivided third, fourth,..., Nth processes are executed one after another. The long-time processing start flag set in the predetermined block is reset (step 308),
Thereafter, other processing is performed.

FIG. 11 is a flowchart of the processing of the control unit 11 when the power switch 15 is turned on. When the power switch 15 is turned on and the power is turned on, the control unit 11 checks whether the long-time processing flag is set (step 4).
01), if the long-time processing flag is not set,
Normal processing is performed (step 402). If the long processing start flag is set, it is assumed that the power switch is turned off and the power is turned off during the execution of the long processing, and the result of the long processing is invalidated. In other words, the processing result is initialized assuming that there has been no long-distance processing subdivision processing (step 403). Thereafter, the long-time processing start flag is reset (step 404), and normal processing is performed. As described above, the long-time process start flag is set before the process is started, the long-time process start flag is reset after the process is completed, and the process is subdivided into a plurality of processes that do not cause inconvenience. After the execution of the simplified processing, the presence or absence of the power switch-off signal is checked, and if there is a switch-off signal, the power-off request signal is output and the power is turned off. Even if the power is turned off, the power can be quickly turned off, and the operator does not feel uneasy.

Even if the power is turned off during the long-time processing, the next time the power is turned on, it is checked whether the long-time processing start flag is set.
Since it is assumed that the power switch is turned off during the processing and the processing result is invalidated for a long time, no inconvenience occurs.
It should be noted that even if a predetermined time elapses after the power switch is turned off, the control unit 11
If the power-off signal CPB is not generated from the
The power is turned off by the power-off signal TPB output from b-1. As described above, the present invention has been described with reference to the embodiments. However, the present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention does not exclude these.

[0031]

As described above, according to the present invention, the power is not turned off immediately after the power switch is turned off, and the power is turned off after the power-off preparation processing (for example, the currently executing data writing processing) is completed. Even if the power switch is inadvertently turned off during operation, a disk error or the like does not occur at the next power-on. Further, according to the present invention, even if an abnormality occurs in the control unit or the like and the power-off signal CPB cannot be output, the power can be reliably turned off after a predetermined time. Further, according to the present invention, when the power switch is turned off, the power-off mask signal PMB is output, the power-off signal TPB based on the elapsed time (timer) is invalidated, and after the predetermined power-off preparation processing is completed, the power-off signal CPB is output. Since it is configured to output and turn off the power , if the control unit is normal, it is possible to prevent the power from being turned off even if the elapsed time reaches the set time before the end of the power-off preparation process. Even after all, you can turn off the power ,
In addition, when the control unit is abnormal, it is ensured after a predetermined time.
Power can be turned off.

Further, according to the present invention, as a power-off preparation process, a process of storing information (format setting information, abnormal state information, etc.) which is to be continued when the power switch is next turned on is performed, so that the power is turned on. Can be continued. Further, according to the present invention, the processing start information is set prior to the start of the long-time processing, the processing end information is set after the processing is completed (the processing start information is reset), and a plurality of processings that do not cause inconvenience are not performed. Because the processing is subdivided, and after the execution of each subdivided processing, the presence or absence of a power switch off signal is checked, and if there is a power switch off signal, a power off request signal is output and the power is turned off. Even if the power switch is turned off during long-time processing, the power can be quickly turned off, and the operator does not feel uneasy. Moreover, according to the present invention, the next time the power switch is turned on, it is checked whether or not the processing start information has been set. Since the processing result is invalidated, even if the power switch is turned off and the power is turned off during long-time processing,
No inconvenience occurs.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a configuration diagram of a first embodiment of the present invention.

FIG. 3 is a flowchart of a power-off signal generation process.

FIG. 4 is another flowchart of a power-off signal generation process.

FIG. 5 is a configuration diagram of a second embodiment of the present invention.

FIG. 6 is a configuration diagram of a third embodiment of the present invention.

FIG. 7 is a flowchart of a power-off control process performed by a control unit.

FIG. 8 is another configuration diagram of a power-off request signal generation unit.

FIG. 9 is a configuration diagram of a fourth embodiment of the present invention.

FIG. 10 is a flowchart of control in the case of long-time processing.

FIG. 11 is a flowchart of a process when power is turned on.

FIG. 12 is a first explanatory diagram of a conventional power supply control.

FIG. 13 is a second explanatory diagram of the conventional power supply control.

FIG. 14 is a third explanatory diagram of the conventional power supply control.

[Explanation of symbols]

 11 Control unit 13 Power supply unit 13a Power supply circuit 13b Power off request signal generation unit 13a-1 Timer 15 Power switch SOF Switch off signal CPB Power off signal TPB Power off signal POF ... Power off request signal

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ryozo Furuya 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Tomomi Ota 1015 Kamedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Fujitsu Limited (72) Inventor Akihiro Abe 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Seiichi Kamon 35th Saho, Kato-gun, Hyogo Prefecture Fujitsu Around Machine Co., Ltd. (72) Inventor Hiromitsu Nishimura 35, Saho, Shato-cho, Kato-gun, Hyogo Pref. Around Fujitsu Machine Co., Ltd. (56) References JP-A-1-298422 (JP, A) JP-A-3-37522 (JP, U) JP-A 64-54129 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G06F 1/26-1/32

Claims (5)

(57) [Claims] When a power switch is turned off, a switch is turned on.
Signal when the power-off request signal is input.
Based on the power supply that cuts off the supply and the switch-off signal
After performing predetermined power-off preparation processing, power-off request signal
And a control unit for outputting the power supply or the control unit side,
The elapsed time after the switch-off signal is generated is counted and the elapsed time
To output a power-off request signal when
In a power supply control device having a stage, the control unit generates a switch-off signal during normal operation.
Invalidates the power-off request signal based on the elapsed time.
Means for generating a power-off mask signal, the power-off request signal output means based on the elapsed time,
Power off due to elapsed time when disconnect mask signal is generated
Prohibits the output of request signals and does not generate the power-off mask signal.
Output the power-off request signal based on the elapsed time.
A power supply control device having a step. 2. A power-off mask signal and a power-off signal from the control unit.
Provide the power supply off request signal output function to the host device of the control unit.
The power supply control device according to claim 1, wherein: 3. The control section generates a power switch off signal.
Power-off request signal after completing the process being executed
Or information that you want to continue when the power is turned on again.
Output power off request signal after saving
The power supply control device according to claim 1. 4. The control unit starts processing before starting processing.
Information and set the processing start information after the processing ends.
Reset and subdivide the process into multiple processes that do not cause inconvenience
Also, after execution of each subdivided process, the power switch
Check for the presence of an off signal and check for a switch off signal.
Output a power-off request signal and check whether the processing start information is set when the power is turned on again.
Power switch during processing, if set.
Deemed to have been turned off, invalidating the processing result,
The power supply control device according to claim 1, wherein: 5. A controller outputs the power-off request signal.
Information that you want to continue when the power is turned on after the power is turned off
5. The power supply control device according to claim 4, wherein
Place.