JPH10114124A - Image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of surely detecting an error at high speed and of executing an adequate error recovery operation. SOLUTION: There disclosed an image forming apparatus wherein controlling of outputting print data to a printing section is executed in a main operation and a printing operation, an error recovery operation and a setting operation of an error code are executed in an interval interruption operation which is started in the main operation. When an error such as toner empty occurs (S20; YES), an error recovery operation for continuing a printing operation of one page (S24) and an error code is set (S25) after the error recovery operation is completed. On the other hand, in the main operation, the error code is referred to and output of the data to the printing section is stopped. As a result, even after the error is detected, it is possible to execute the printing of one page.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the technical field of an image forming apparatus such as a printer connected to a personal computer or the like.

[0002]

2. Description of the Related Art Conventionally, in an image forming apparatus such as a printer, an error such as a cover open, a paper jam, or a toner empty is detected by an interval interrupt process even during an image forming operation. In the main process that sets an error code in the interval interrupt process and starts the interval interrupt process, an error process for stopping transmission of print data to the print engine based on the error code is performed.

In the conventional apparatus, error processing is also performed in the interval interrupt processing. When an error of cover open and paper jam is detected, the motor is stopped in the interval interrupt processing. Alternatively, the power supply to the high-voltage unit is stopped, and the image forming operation is immediately stopped.

[0004]

However, in the conventional image forming apparatus, since the error code is set before the end of the error processing in the interval interrupt processing, the error processing in the main processing is executed. Error processing in the interval interrupt processing was not performed properly.

For example, for a toner empty error, the toner is not completely exhausted, so that an image forming operation for one page can be performed. However, when an error is detected, an error code is set. In the interval interrupt processing, although the image forming operation is continuously performed, the error code is referred to in the main processing, and the output of the print data to the print engine is stopped. Will result in a blank area.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image forming apparatus capable of quickly and reliably detecting an error and executing an appropriate error process.

[0007]

According to a first aspect of the present invention, there is provided an image forming apparatus, comprising: a data input unit for inputting data from a data output unit; Image forming means for forming on a recording material, error detecting means for detecting an error in the image forming means, data input by the data input means being output to the image forming means, and an image forming operation being performed by the image forming means. Control means for performing an interval interrupt process, outputting the data to the image forming device, and stopping the output of the data based on the error information by a main process. Image formation, an error detection process for checking whether the error detection means has detected an error, and an error detection process for detecting an error. A processing performed by the interval interrupt processing settings and the error information, characterized by comprising a control means for setting said error information after completion of the error processing.

According to the image forming apparatus of the first aspect,
Data output from a host device such as a personal computer as data output means is input by the data input means and output to the image forming means in a main process executed by the control means. In the main process, an interval interrupt process is started, it is checked whether or not the error detecting means detects an error of the image forming means in the interval interrupt, and an image forming operation based on the data is performed. Will be Then, when an error is detected in the interval interrupt processing, error processing in the interval interrupt processing is performed, and error information is set after the error processing is completed. This error information is referred to in the main processing, and the output of the data to the image forming unit is stopped. Therefore, the output of the data to the image forming means is continued until the error information is set. For example, when the image forming operation is continued as the error processing in the interval interrupt processing, a normal image forming operation is performed. For example, an appropriate error process in the interval interrupt process and a predetermined error process in the main process are executed.

According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, the error processing includes processing for completing an image forming operation after the error detection. .

[0010] According to the image forming apparatus of the second aspect,
When an error is detected in the interval interrupt processing, error processing is performed in the interval interrupt processing to complete the image forming operation after the error detection, and the image forming operation is continuously performed after the error detection. . However, the setting of the error information is performed after such error processing is completed, that is, after the image forming operation for one page after the error is detected is completed. The output is continuously performed, and the image forming operation for one page is normally performed without generating a blank portion. After the image forming operation for one page is completed, the error information is set, and the output of the data to the image forming unit is stopped. in this way,
Even after the detection of the error, the image forming operation after the error detection is completed, and data to be formed after the error recovery is secured.

According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect,
A display unit is further provided, and the main processing includes an error display by the display unit based on the error information.

According to the image forming apparatus of the third aspect,
In the main processing, an error display is performed by the display means based on the error information, so that an appropriate error recovery measure is prompted for the user. However, this error display is performed in the interval interrupt processing as described above. Since the error processing is performed and is performed based on the error information set after the error processing is completed, the appropriate error processing is reliably executed without interruption.

According to a fourth aspect of the present invention, in the image forming apparatus according to the first or second aspect, the image forming apparatus further includes a facsimile transmitting / receiving unit and a display unit, and the control unit includes a facsimile transmitting / receiving function. A main task for realizing a display function, and a subtask for realizing the main processing are processed in parallel by time division, and in the main task, an error display by the display means based on the error information; The error information is erased, and the error information is erased after the error display processing is completed.

According to the image forming apparatus of the fourth aspect,
The subtask is executed, and the error detection processing is performed by activating the interval interrupt processing in the main processing. Then, when it is recognized that an error is detected in the error detection processing, the above-described error processing is executed, and after the error processing is completed, setting of error information is performed, but the task is switched to the main task. Thus, an error is displayed by the display unit based on the error information, and the error information is deleted. Therefore, the setting of the error information may be performed even during the execution of the main task. However, it takes a predetermined time until the error display processing in the main task is completed. Not performed, and the above-described data output stop processing based on the error information is reliably performed in the main processing in the subtask. On the other hand, in the main task, even when the facsimile transmission / reception function is being executed, an error display process is performed after the end of the error process, and the user is prompted to take appropriate error recovery measures.

According to a fifth aspect of the present invention, in the image forming apparatus according to the fourth aspect, the control means activates the interval interrupt processing also in the main task, and causes the facsimile transmission / reception means to execute the interval interruption processing. An image can be formed by the image forming means on the basis of the facsimile data received.

According to the image forming apparatus of the fifth aspect,
Also in the main task, the interval interrupt processing is started, and an image is formed by the image forming means based on the facsimile data received by the facsimile transmitting / receiving means, so that the image forming apparatus can be effectively used as a multifunctional peripheral device. At the same time, appropriate error processing and error display at the time of facsimile data image formation are performed.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. (First Embodiment) First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the first embodiment of the present invention.
2 is a perspective view of an image forming apparatus and a host device according to the embodiment, FIG. 2 is a sectional view of the image forming apparatus, and FIG. 3 is a functional block diagram.

As shown in FIGS. 1 and 3, the image forming apparatus 1 of the present invention is connected to a PC (personal computer) 2 as a host device via an I / O port (input / output port) 3 and a cable 4. Have been.

The image forming apparatus 1 includes a facsimile unit as a facsimile transmission / reception unit for realizing a facsimile function, and an image forming unit for realizing a printer function for printing data transmitted from the facsimile unit or the PC 2. And a multi-task process as described later, so that both functions can be performed in parallel.

First, as shown in FIG. 3, the facsimile unit includes an NCU (network control unit) 5 for performing line control, and is connected to a telephone line via the NCU 5. The CPU 10 as a control means is connected to the following units of the apparatus via a bus line, and controls the respective units of the apparatus according to a predetermined communication control procedure to realize a facsimile operation, that is, data communication.

A modem 11 for facsimile communication as a data input means modulates image information as a digital signal into an analog signal and transmits the analog signal to a telephone line via the NCU 5 or an external data output via the telephone line. It demodulates an analog signal as image information transmitted from the facsimile apparatus as a means via the NCU 5 to a digital signal, and transmits and receives various signals for transmission control.

The buffer memory 12 has a plurality of areas such as a transmission buffer area 12a for temporarily storing encoded image data transmitted and received via a telephone line, and a reception buffer area 12b. .

The ROM 13 stores a control program for controlling not only the facsimile unit but also the printer unit by multitask processing as described later. EEPR
The OM 14 stores various setting information such as the dial number of the destination and data of the destination name and the one-touch number.
This EEPROM 14 turns off the power of the image forming apparatus 1
Even if F is performed, the contents are not erased. RAM1
Numeral 5 temporarily stores various data at the time of executing the operation.

Scanner 1 as one of data output means
Reference numeral 6 denotes a unit for reading the image of the document 32 as shown in FIG. 2, and is configured as follows. First, a plurality of originals 32 stacked on an original placing table 31 arranged on the upper side of the main body 1a are separated one by one by a separating body 33 and a first conveying roller 34, and the second conveying roller pair 3 is separated.
Sent in the direction of 5. The front surface (lower surface in the present embodiment) of the document 32 conveyed from the second conveyance roller pair 35 to the paper discharge roller 36 is read by a reading unit 37 disposed therebetween.
The light from the light source unit 38 is irradiated, and the reflected light enters a reading head 39 such as a line image sensor via a lens system or a reflecting system, and the reading head 39 obtains image data for each page of the document 32.

The image data read by the scanner 16 in this manner is encoded by an encoding unit 17 as data input means shown in FIG. 3, and is automatically transmitted in sequence through the transmission buffer area 12a. Or image memory 19
And send it at the specified time. The time-specified transmission is convenient when there is a time difference with the called facsimile machine or when group transmission is performed. The image data output from the PC 2 can be temporarily stored in the image memory 19 and then printed by the printer unit.

On the other hand, in a normal receiving operation in which recording is performed in real time in the facsimile section, a predetermined communication control procedure is performed with another facsimile apparatus via a telephone line, and then transmission image information is received. It is temporarily stored as image data in the reception buffer area 12b. The image data is decoded (decompressed) by the decoding unit 20, and is developed and written into a dot image in the bit image storage area of the image memory 19 for storage in units of one page. Then, bit development is performed at a predetermined resolution, and this is sent to the printer 18 to be imaged (printed) in units of one page.

An operation unit 21 provided in the facsimile unit
Includes a display unit 43 such as a liquid crystal display unit as a display unit for displaying the operating state of the facsimile unit and registration characters such as the destination name as shown in FIG.
Numeric keypad 4 for the operator to execute various operations
4, Function key 45, One-touch registration key 4
6, a shortcut key 47 and the like.

Next, a printer section as an image forming means will be described. The printer 18 records the received image data and the like as a hard copy on recording paper as a recording material. The received data includes, in addition to the data received by the facsimile unit, the CPU 10 and the image memory 19 and the like. The received data from PC2 is also included.

That is, data transmission / reception between the printer unit and the PC 2 is performed via the I / O port 3 and the cable 4 as data input means, and the image data output from the PC 2 is temporarily stored in the image memory 19. Thereafter, the data is printed by the printer 18, and the input / output processing and storage processing of these data are performed under the control of the CPU 10.

The specific configuration of the printer 18 is shown in FIG. As shown in the figure, a paper feed cassette 22 is provided at the rear of the main body 1a of the facsimile machine 1, and the recording paper 23 in the paper feed cassette 22 is fed by a half-moon-shaped paper feed roller of a paper feed unit. At 24 and the like, paper is fed toward the photosensitive drum 25 in the recording unit. Next, the photosensitive drum 25 is scanned by laser light emitted from the optical scanning unit 26.
A latent image is formed on the recording medium 23, and the latent image is developed using toner supplied from the toner cartridge 27 and the developing device 28, transferred to the recording paper 23, and passed through a fixing device 29 including a heating roller and a pressure roller. Then, the toner image is fixed, and is sent to the paper discharge tray 30. As described above, the printer 18 of the present embodiment is an electrostatic electrophotographic recording type printer. It should be noted that a thermal printer system or the like that prints an image on thermal paper with a thermal head can be used as the printer 18.

As described above, in this embodiment, 1
A facsimile function and a print function are realized by multi-task processing in one CPU 10, and as shown in FIG. 4, a FAX task and a printer task are switched at 1/60 second intervals, and a FAX-related operation and a printer-related operation are performed. Are processed in parallel in time division.

In any of the FAX task and the printer task, the printer unit is driven to perform a printing operation. In order to execute a normal printing operation, error detection means such as a sensor (FIG. (Not shown) is provided at a predetermined position of the apparatus, and the CPU 10 checks whether an error such as an open cover of the apparatus body, a paper jam, or a toner empty occurs. This error detection process employs a method of performing an interval interrupt process in the FAX task and the print task.

In other words, by detecting the occurrence of an error in the interval interrupt processing, an error code as error information is set, and in the main processing that activates the interval interrupt processing, the print engine sends to the print engine based on the error code. Error processing is performed to stop sending print data.

Also, error processing is performed in the interval interrupt processing. If an error such as a cover open and paper jam is detected, the motor is stopped in the interval interrupt processing or the high voltage section is stopped. The image forming operation is stopped immediately after the energization is stopped.

Further, for example, for a toner empty error, since the toner is not completely exhausted, the image forming operation is not immediately stopped, and an error process for completing the image forming operation for one page is performed. .

However, if the set timing of the error code as the error information is before the end of the error processing in the interval interrupt processing, the error processing in the interval interrupt processing can be performed normally by executing the error processing in the main processing. Sometimes it was not done.

For example, if an error code is set when a toner empty error is detected in the interval interrupt processing, the print processing is continuously performed in the interval interrupt processing. The output of the print data to the printing unit is stopped by referring to the error code, and a blank portion may be generated in a part.

Therefore, according to the present invention, by setting the timing of setting the error code after the end of the error processing in the interval interrupt processing, when printing of one page is possible such as toner empty,
The printing of one page is completed.

Hereinafter, the operation of the present embodiment will be described with reference to the flowcharts of FIGS. FIG.
Is the FA that can be switched at 1/60 second intervals as described above.
9 is a flowchart illustrating an outline of an X task and a printer task.

The FAX task is roughly divided into four processes as shown in FIG. First, an error detection process (step S1) checks an error code set in a print execution module process by an interval interrupt process described later, and if an error code has been set, the display unit 43 according to the error code. Error display. Then, after performing the error processing, the error code is stored as a code in the FAX task and the error code set in the print execution module processing is cleared for the error recovery processing. The key detection process (step S2) performs a process of transmitting facsimile data in response to a key input from the operation unit 21, and activates the scanner 16 when the copy key of the operation unit 21 is pressed. The read data is output to the printer 18 and printing is performed. Next, the facsimile reception process (step S3) is a process of storing the data received by facsimile in the buffer memory 12 and transmitting the data to the printer 18 as described above. The print process (step S4) is a process for performing a print operation by driving the above-described printer unit. The FAX task is used to print data received by facsimile, data read by the scanner 16, or the like. This print processing is executed only when there is a print request, such as when facsimile data is received or when copying is performed (the determination step is omitted in FIG. 5). The details will be described later.

Next, as shown in FIG. 5, the printer task is a task for performing only print processing (step S5) when a print request is issued from the PC 2, and the print task (step S4) in the above-described FAX task. )
Calls the same subroutine as. The printer task is executed only when a print request from the PC 2 is detected by interrupt processing for time division switching activated in the FAX task. , FA
Only the X task is executed.

That is, when there is no print request from the host device (PC2), only the FAX task is executed. However, when there is a print request from the PC2, a print process (step S5) is performed. Interrupt processing for time-division switching (task switching) is started.
The FAX task and the printer task are alternately executed at intervals of / 60. Thereafter, when the printing process of the print data sent from the PC 2 is completed, the interruption process for the time division switching (task switching) is stopped,
Only the FAX task is executed again.

Next, based on the flowchart of FIG.
The print processing called by both the AX task and the printer task will be described. First, it is determined based on the resource flag whether or not resources can be secured (step S).
11). This is because the printer unit is used for both facsimile data printing and data printing from the PC 2, and if the printer unit is already used for printing any data,
This resource flag is set.
Therefore, when the resource flag is set (step S11; NO), the process waits until the resource is released, and when the resource flag is reset (step S11; YES), the resource securing the resource flag is set. Processing is performed (step S12).

When the resources are secured, a print execution module process to be described later is started, data is output to the printer unit, and a print process for checking an error code set in the print execution module process is performed. Perform (Step S13). That is, the printing process starts the interval interrupt process for operating the printer 18, and the printing operation is executed in the interval interrupt process. In this printing process, it is also checked whether or not printing of all data requested to be printed has been completed. When printing of all data has been completed, an end flag is set.

It is determined based on the end flag whether or not printing has been completed (step S14). If the end flag has been reset and has not been completed (step S14;
NO), the printing process (step S13) is performed again. However, if the end flag has been set and the process has ended (step S14; YES), a resource release process for resetting the resource flag is performed (step S15), and the print process ends.

Next, the print execution module process by the interval interruption process started in the print process (step S13) will be described with reference to the flowchart of FIG. First, an error detection process is performed to determine whether an error has occurred in the printer unit (step S20). The detection of this error is performed in an interval interrupt process for a print process or another interval interrupt process started by a FAX task. When an error occurs, an error flag is set. . Information about the type of error that has occurred is also set at the same time. Therefore, when the error flag is reset, no error has occurred (step S20; NO), and a normal printing operation can be performed, so that the printer unit is operated to perform the printing process (step S20). S21). Then, it is determined whether or not printing of all data has been completed (step S22). If not completed (step S22; NO), the process returns as it is, and if completed, (step S22;
YES), the operation of the printer unit is stopped, and an end process for setting an end flag is performed (step S23).

On the other hand, if the error flag is set,
If an error has occurred (step S20; YE
S), error processing is performed according to the type of the error (step S24). In other words, in the case of a cover open or a paper jam, the motor is immediately stopped, and the energization to the high-voltage section is stopped. The toner empty, the heater temperature abnormality (excessive rise), the polygon abnormality (speed deviation),
In the case of an error such as out of paper or the like, processing for completing printing of one page of data currently being printed is performed. this is,
This is because, in the case of these errors, printing can be executed without causing a device failure if the printing is about one page.

After the error processing ends, an error code is set (step S25), and the print execution module processing ends. Thus, in the printing process (step S13) during the printing process shown in FIG. 6 described above, the output of the data to the printer unit is stopped, and
The end flag is set, and it is determined that printing is completed (step S14; YES), resources are released (step S15), and the printing process ends.

On the other hand, in the FAX task, as shown in FIG. 5, error detection processing (step S1)
The error code is referred to, and if the error code is set, the display unit 4 is displayed in accordance with the error code.
An error message is displayed at 7. After the error is displayed, the error code is stored as a code in the FAX task and the error code is cleared for error recovery processing.

The timing of the processing after the occurrence of the above error is shown in the timing chart of FIG. As shown in FIG. 8, when the FAX task and the printer task are switched by the multitask process, and data is printed from the PC 2, for example, a toner empty error is detected at the timing A. Then (step S20 in FIG. 7; YES), print processing is performed to print one page of the page currently being printed (step S24 in FIG. 7). Then, an error code is set at timing B when the error processing ends (step S25 in FIG. 7), whereby the printer task outputs data to the printer unit in the printing processing (step S13 in FIG. 6). Stopped. Accordingly, during the period from A to B, since no error code is set, the process of stopping the output of data in the printing process of the printer task is not performed, and
Printing is being performed continuously (step S14 in FIG. 6; NO to step S13). As described above, according to the present invention, the error code is set at a timing after the end of the error processing in the interval interrupt processing. Therefore, in the case of an error that can actually be printed, such as toner empty, printing of one page is performed. The operation can be completed.

Then, in the printer task after the timing B, when the task is switched to the FAX task after the output of data to the printer unit is stopped, the error code is referred to and the error display processing is started ( Step S1 in FIG. 5). In the period after C, since the print processing has been completed, only the FAX task is being executed. Hereinafter, after the error display processing is performed for a predetermined time, the error code is cleared. (Step S1 in FIG. 5).

As described above, even if the error code is cleared by the FAX task, the error code is cleared after the end of the error display processing requiring the predetermined time.
The output stop processing of the data in the main processing of the printer task can be reliably executed. For example, if the set of error codes is the timing of D shown in FIG. 8, that is, if the FAX task is being executed and only the idle processing is being executed, the error display processing is started in the FAX task. This error display process requires a predetermined time. Therefore, at least one printer task is executed by the time the error display processing ends, and the data output stop processing is executed in the printer task as described above.

As described above, according to the present invention, the error code is set at a time after the end of the error processing in the interval interrupt processing, so that printing of one page after the error is detected can be completed. . This is not limited to the print processing (step S5) executed by the printer task, but the print processing of facsimile reception data (step S5) executed by the FAX task.
The same applies to 4) or print processing for copying.

(Second Embodiment) Next, a second embodiment of the present invention will be described. The description of the common parts of the first embodiment is omitted.

In the above embodiment, the case where the present invention is applied to a multifunctional peripheral device capable of realizing a facsimile function and a printer function as an image forming apparatus has been described, but the present invention is not limited to this. The present invention is also applicable to an image forming apparatus having only a printer function.

[0056]

According to the image forming apparatus of the first aspect, in the main processing, output of data to the image forming means, activation of interval interrupt processing, and stop of output of the data based on error information. In the interval interrupt processing, a check is made as to whether the error detecting means has detected an error in the image forming means, an image forming operation based on the data, and an error processing when an error is detected are performed. Since the error information is set after the end of the error processing, the output of the data to the image forming unit is continued until the error information is set even if an error is detected. When the image forming operation is continued as an error process in the process, an interval interrupt such as a normal image forming operation is performed. It is possible to execute a predetermined error process in the main processing with a suitable error processing in management.

According to the image forming apparatus of the second aspect,
Since the error processing includes processing for completing the image forming operation after the error detection, the setting of the error information is performed after the image forming operation for one page after the error detection is completed. By continuously outputting the data to the means, the image forming operation for one page can be performed normally without generating a blank portion. Then, after the image forming operation for one page is completed, the error information is set, and the output of the data to the image forming unit is stopped. Therefore, data to be formed after the error recovery can be secured. .

According to the image forming apparatus of the third aspect,
The main processing further includes an error display by the display means based on the error information, so that it is possible to prompt a user to take appropriate error recovery measures, and to display the error display in the error processing. Since the error processing is performed based on the error information set after the termination, the appropriate error processing can be surely executed without interruption.

According to the image forming apparatus of the fourth aspect,
Facsimile transmission / reception means and display means, wherein the control means processes a main task for realizing a facsimile transmission / reception function and a display function and a subtask for realizing the main processing in parallel by time division. ,
In the main task, an error display by the display means based on the error information and erasure of the error information are performed, and the erasure of the error information is performed after the error display processing is completed. The above-described data output stop processing based on the error information can be reliably performed. Further, in the main task, even when the facsimile transmission / reception function is being executed, an error display process is performed after the end of the error process, so that the user can be prompted to take appropriate error recovery measures.

According to the image forming apparatus of the fifth aspect,
Also in the main task, the interval interrupt processing is started, and the image forming unit can form an image based on the facsimile data received by the facsimile transmitting / receiving unit. The device can be effectively used as a peripheral device, and appropriate error processing and error display can be performed at the time of facsimile data image formation.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an image forming apparatus and a host device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a schematic configuration of the image forming apparatus according to the first embodiment of the present invention.

FIG. 3 is a functional block diagram of the image forming apparatus according to the first embodiment of the present invention as viewed from the hardware side.

FIG. 4 is a timing chart illustrating multitasking according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing a flow of processing of a FAX task as a main task and a printer task as a subtask in the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating a flow of a printing process according to the first embodiment of the present invention.

FIG. 7 is a flowchart illustrating a flow of a print execution module process according to the first embodiment of the present invention.

FIG. 8 is a timing chart showing the timing of processing after error detection according to the first embodiment of the present invention.

[Description of Signs] 1 ... Image Forming Apparatus 2 ... PC 3 ... I / O Port 4 ... Cable 5 ... NCU 10 ... CPU 11 ... Modem 12 ... Buffer Memory 12a ... Transmission Buffer Memory 12b ... Reception Buffer Memory 13 ... ROM 14 ... EEPROM 15 RAM 16 Scanner 17 Encoding unit 18 Printer 19 Image memory 20 Decoding unit 21 Operation unit 22 Paper cassette 23 Recording paper 24 Paper feed roller 25 Photoconductor drum 26 Light Scanning unit 27 Toner cartridge 28 Developing device 29 Fixing device 30 Paper discharge tray 31 Document placement table 32 Document 33 Separator 34 First transport roller 35 Second transport roller 36 Paper discharge roller 37 Reading unit 38 ... Light source unit 39 ... Reading head 43 ... Display unit 44 ... Key 45 ... Function Key 46: One-touch registration key 47: Shortcut key

Claims (5)

[Claims] A data input unit that inputs data from a data output unit; an image forming unit that forms the data input by the data input unit on a recording material; and an error that detects an error in the image forming unit. Detecting means, and control means for outputting data input by the data input means to the image forming means and causing the image forming means to perform an image forming operation. An output of the data and a stop of the output of the data based on the error information are performed by a main process, an image is formed by the image forming unit, and an error detection process of checking whether the error detection unit has detected an error. Error processing when an error is detected, and setting of the error information are performed by the interval interrupt processing. And control means for setting the error information after the error processing is completed. 2. The image forming apparatus according to claim 1, wherein the error processing includes a process for completing an image forming operation after the detection of the error. 3. The image forming apparatus according to claim 1, further comprising a display unit, wherein the main processing includes an error display by the display unit based on the error information. 4. A facsimile transmission / reception means and a display means, wherein the control means time-divides a main task for realizing a facsimile transmission / reception function and a display function and a subtask for realizing the main processing. And in the main task, performing an error display by the display unit based on the error information and erasing the error information, and performing the erasure of the error information after the end of the error display processing. The image forming apparatus according to claim 1, wherein: 5. The image processing device according to claim 5, wherein the control unit activates the interval interrupt processing also in the main task and forms an image by the image forming unit based on facsimile data received by the facsimile transmitting / receiving unit. The image forming apparatus according to claim 4, wherein: