JP2625450B2 - Control method in power-off sequence - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control method in a power-off sequence, and more particularly to a control method in a power-off sequence of an electronic device capable of recording data on a recording medium.

2. Description of the Related Art Conventionally, a print control apparatus provided with a disk such as a floppy disk drive (hereinafter, referred to as FDD) and a hard disk (hereinafter, referred to as HD) is stored in a predetermined memory in a disk at power-off. Even while data is being written, control is performed according to a sequence for turning off the entire power when the power switch is turned off.

[Problems to be Solved by the Invention] However, when the power is turned off during the writing to the disk, the contents of the disk during the writing are often destroyed. It was not easy to judge the destruction situation of the outside from outside.

Therefore, when a disk failure phenomenon occurs, it is very difficult to determine whether the cause is a failure of the disk itself or an abnormality when the power is turned off.

[Means for Solving the Problems] In order to solve the above problems and achieve the object, the present invention provides an electronic apparatus capable of recording data on a recording medium, after the power is turned off and then turned on again. A power-off sequence control method capable of recognizing whether or not a power-off sequence has been executed at the time of power-off by referring to contents held in a predetermined area of the memory holding means. Determining whether the operation of writing data to the recording medium has been completed; and determining that the operation of writing data to the recording medium has been completed in the determining step. And writing a specific pattern in the area.

[Operation] According to the above configuration, when the power is turned on again after the power of the device is turned off, by referring to the specific pattern held in the predetermined area of the memory holding means, the predetermined pattern can be obtained when the power is turned off. It is possible to recognize whether or not the processing (power-off sequence) has been executed reliably.

Embodiment A preferred embodiment according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram showing the configuration of the printing apparatus of the present embodiment.

In FIG. 1, reference numeral 1 denotes a CPU that controls the entire printing apparatus of the present embodiment. Reference numeral 2 denotes a program for controlling the CPU 1, a program for error processing, and FIGS.
Is a ROM for storing a program for executing the flowchart shown in FIG. Reference numeral 3 denotes a RAM used as a working area used when executing various programs stored in the ROM 2, an area for temporarily saving during error processing, and the like.

4 is an interface unit for connecting an interface cable from an external device such as a host computer and inputting / outputting data, 5 is an FDD device functioning as an external storage device using a floppy disk, and 6 is mounted inside a printing device. This is the HD section. Reference numeral 7 denotes a CRT display for displaying various display contents at the time of execution, and reference numeral 8 denotes a keyboard unit provided with various keys such as control keys or numerals.

Reference numeral 9 denotes a switch unit for switching power on / off of the power supply, and reference numeral 10 denotes a page buffer unit for expanding data input from an external device for each page. Reference numeral 11 denotes a font memory unit for converting data output from the page buffer unit 10 from code data to dot data, and reference numeral 12 denotes a bit map memory unit for expanding the dot data output from the font memory unit 11 in page units.

Reference numeral 13 denotes a printer unit for performing printing based on data in the bit map memory unit 12, and reference numeral 14 denotes a nonvolatile memory for writing and reading a specific pattern for determining whether there is an abnormality in a power-off sequence of a power supply.

Next, the operation of the printing apparatus of the present embodiment configured as described above will be described below.

First, a data input operation from an external device (not shown) is started in response to a predetermined command input from the keyboard unit 8, and data is input from the interface unit 4 via an interface cable (not shown). This input data
When predetermined analysis processing is performed by the CPU 1 and reconstructed as page data in page units, the page data is developed in the page buffer unit 10. The page buffer unit 10 may be provided with a plurality of page buffers to improve the efficiency of the printing process.

Next, the font memory unit 11 is accessed to convert the page data developed in the page buffer unit 10 from code data to dot data. The dot data is developed in the bit map memory unit 12 for each page. On the other hand, when the printer unit 13 enters the ready state, the dot data is sent from the bit map memory 12 to the printer 11 while synchronizing with the input signal from the printer unit 13 to perform predetermined printing.

The CRT display unit 7 has a communication status with an external device, a communication status with the printer unit 13, an internal status of the printer unit 13, for example, the size of a paper cassette, the presence or absence of a recording sheet, and the presence or absence of an abnormality such as a jam. Is displayed. Further, in the HD unit 6, various form information necessary for business purposes and various font patterns can be registered, and new registration is possible. It is possible to write various data as logging information in the FDD unit 5 with respect to the HD unit 6.

For example, when printing a desired job, the start time of the job, the job name, the time of occurrence of the error, the content of the error, and the like are recorded in a predetermined memory of the FDD unit 5.

Then, when you turn off the power of the printing device and the FD
The operation of the CPU 1 in the power-off sequence until a message indicating that the power of the power supply can be turned off is displayed according to the flowchart of FIG. 2A so that the processing of writing data to the D unit 5 does not overlap. I do.

First, a specific command indicating “data write processing” is input from the keyboard unit 8 when data has been written to the FDD unit 5 or when data is to be written to the FDD unit 5 from now on.

CPU 1 analyzes whether the input command is a specific command of “data write processing”, and if the result of the analysis is “data write processing”, waits until the data write processing in FDD unit 5 is completed. Hold (Step S
2). If the input command is not a specific command, normal processing is performed.

In the case of a specific command, FDD section (HD section 6 may be used)
When the end of the data write operation is detected, a specific pattern indicating that the data write has been normally completed is written in the abnormal check column of the nonvolatile memory 14 (step S3).
Then, the address in the abnormal check column is incremented by one, "1" is added to the content (step S4), the address is decremented by one, and the address is returned to the abnormal check column again (step S5).

Further, a message of "power off OK" is displayed on the CRT display unit 7 as a message that can be turned off (step S6).

As described above, the power supply can be turned off by the switch unit 9 without any trouble in writing the data from the time when "power off OK" is displayed.

Next, the operation of the CPU 1 when the power of the power supply is turned on by the switch unit 9 will be described below with reference to the power-on sequence according to the flowchart of FIG. 2 (b).

When the power is turned on, first, data is read from the abnormal check column of the nonvolatile memory unit 14 (step S1), and it is determined whether or not this data is a specific pattern (step S1).
S2). If a specific pattern is written,
The specific pattern data written in the abnormal check column is cleared (step S13). Then, the address in the abnormal check column is incremented by one, and "1" is added to the content of the address (step S14). That is, this address functions as a counter that records the number of times a specific pattern has been written to the nonvolatile memory unit 14. If the number of times of writing is displayed by inputting a predetermined command from the keyboard section 8, the life of the nonvolatile memory 14 can be known.

After step S14, the address is decremented by one, and the address is returned to the abnormal check column again (step S15).

On the other hand, when the specific pattern is not written in the nonvolatile memory section 14, the message of "power-off sequence abnormality" is read out from the data stored in the HD section 6 and the CR is read.
It is displayed on the screen of the T display section 7 (step S16).

If the power supply has been unexpectedly turned off due to an abnormality in the power supply or the like, the job writing process is stopped when the above-mentioned "power-off sequence error" is displayed, and the job writing is started again from the beginning. What is necessary is just to restart processing.

In particular, the message is not limited to the above-described “power-off OK” or “power-off sequence abnormality”, and any message can be used as long as it can accurately grasp each situation.

Further, in the above-described power-off sequence, if a message indicating that the power supply cannot be turned off is displayed on the CRT display unit 7 when the CPU 1 inputs a specific command, more secure data writing processing becomes possible.

As described above, according to the present embodiment, the FDD unit or the HD
If an error occurs in the data recorded in the unit, whether the error is caused by an error at power-off or FDD
This is very convenient on the service because it is possible to clearly determine whether or not it is caused by a specific trouble of the unit or the HD unit.

Further, if the logging data is destroyed due to an abnormality at the time of power-off, the abnormality can be confirmed immediately, so that the job can be re-executed, and the smooth flow of business will not be hindered.

The present embodiment can be variously modified without departing from the gist of the present invention. Therefore, another embodiment will be described below.

First, at least two switch units that enable power-off input are provided, and when power-off is input by one of the switch units, the same operation as when a specific command input from the keyboard unit 8 is input is performed. Let That is, similar to the flowchart of FIG. 2, after the writing to the FDD unit 5 or the HD unit 6 is completed, a specific pattern is written to the nonvolatile memory unit 14. Then, a message such as "power off OK" is displayed on the CRT display unit 7, and after the message is displayed, power off is input with the other switch. In this way, even when the power of the power supply of the printing apparatus is completely turned off, the same operation and effect as in the present embodiment can be obtained.

Further, the power supply may be completely turned off by inputting a command from the keyboard unit 8 without depending on the switch unit 9. Of course, the stitch part does not have to be provided, and if the write data to the FDD part or HD part is long,
Since the write processing time becomes longer, power-off processing may be performed once in the middle.

Alternatively, in the power-off sequence of the power supply, if the date and time of the power-off are stored in the nonvolatile memory unit 14, it is easy to distinguish the power-off when an abnormality occurs.

When the power supply is turned on, the number of times of writing data to the nonvolatile memory may be displayed on the CRT display unit 7.

[Effects of the Invention] As described above, according to the present invention, a specific pattern is written in a predetermined area of the storage unit after the data write operation to the recording medium is completed, and when the power is turned on again, the specific pattern is written. When the stored data has an abnormality by recognizing whether or not the power-off sequence has been executed at the time of power-off with reference to, it can be reliably determined whether or not the abnormality has occurred at the time of power-off. .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing the configuration of a printing apparatus according to the present embodiment, and FIGS. 2A and 2B are flow charts for explaining a sequence at the time of power on or off according to the present embodiment. In the drawing, 1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... Interface section, 5 ... FDD section, 6 ... HD section, 7 ... CRT display section, 8 ... Keyboard section, 9 … Switch part, 10… Page buffer part, 11… Font memory part, 12… Bit map memory part, 13 …… Printer part,
14 ... Non-volatile memory unit.

Claims (4)

(57) [Claims] 1. An electronic device capable of recording data on a recording medium, wherein after power is turned off and then turned on again, the contents held in a predetermined area of the memory holding means are referred to, whereby A control method in a power-off sequence capable of recognizing whether or not a power-off sequence has been executed at the time of power-off, a step of determining whether or not an operation of writing data to the recording medium has been completed, A step of writing a specific pattern in a predetermined area of the storage unit after it is determined in the determining step that the operation of writing data to the recording medium is completed, the control method in the power-off sequence. 2. The control method according to claim 1, wherein said storage means is a nonvolatile memory. 3. The method according to claim 2, further comprising the step of, after writing the specific pattern in a predetermined area of the storage unit in the writing step, displaying a signal indicating that the power can be shut off. Claim 1 or Claim 2
5. The control method in the putter-off sequence described in 1. 4. Writing data representing the number of times a specific pattern has been written to a predetermined area of said storage means in said writing step, in an area of said storage means different from said predetermined area of said storage means. The control method in a power-off sequence according to any one of claims 1 to 3, further comprising a step.