JPH0792629B2 - Image processing device - Google Patents

Description

The present invention relates to an image processing apparatus for an image processing system including a plurality of image output units and a plurality of image forming units.

Conventionally, proposals have been made regarding image processing in which an image is formed based on an image signal obtained by photoelectrically reading a document, but these have a one-to-one correspondence between the image signal output unit and the image forming unit. Most are present. Further, it is considered that a plurality of images are formed at the same time based on the image signal output from one output section, but this requirement cannot be completely dealt with by merely electrical connection, and it is suitable for that. It requires control and display. In such a system, a shutoff start command is output from the data output unit to the image forming apparatus for safety measures or for saving effective energy.

However, if such a shutoff start command is output to all the image forming units at once, it is inconvenient because all the image forming units cannot be used at once.

This is because such an image forming unit requires a predetermined preparation period to perform normal image formation from the shut-off state, and any one of the plurality of data output units operates in order to improve the usability of the entire system. It is desirable to keep at least a part of the image forming apparatus operating as long as possible. On the other hand, in order to reduce the power consumption of the entire system, it is desirable to keep the image forming apparatus inoperative as much as possible.

Therefore, in view of such a point, an object of the present invention is to provide an image processing apparatus which is easy to use and reduces the power consumption of the entire system.

In order to achieve such an object, the present invention forms an image based on a plurality of data output units (corresponding to 101 to 104 in FIG. 3 in the embodiment) and digital image signals output from the plurality of data output units. An image processing apparatus for a system having a plurality of image forming units (also 111 to 118 in FIG. 3) that are larger in number than the data output unit. Generating means for generating data indicating the image forming section selected so as to correspond to each of the plurality of output sections (MIMOU which also executes step S20-10 in FIG. 20-2), and the corresponding image from the data output section. A means for outputting a shutoff start command to the forming unit,
When the shut-off start command is output from the data output unit, the shut-off start command is output to the corresponding image forming unit in response to the data generated by the generating unit, and the shut-off start command is output from each of the plurality of output units. When an off-start command is output, a control means for outputting a shut-off start command to an image forming unit that does not correspond to any of the output units based on the data generated by the generating unit (also FIG. 20-2). of
MIMOU9) for executing S20-11 to S20-14.

The present invention will be described in detail below based on examples.

FIG. 1 is an external view of a system according to the present invention.

The signal lines of the readers 1 and 2 for reading the original image are connected to the multi-input / multi-output device 3, and the multi-input / multi-output device 3 connects the signal lines to the printers 4 and 5 that record an image on a recording material such as paper. Are connected. In FIG. 1, only two readers and two printers are shown, but it is of course possible to combine less than or more than two readers. In the present embodiment, the maximum number of connected devices is 4 readers and 8 printers.
It's on the table.

Next, a detailed description will be given of the inside of the reader, the multi-input multi-output device, and the printer with reference to FIGS.

FIG. 2 is a configuration diagram showing an example of the internal configuration of the readers 1 and 2.

In the present embodiment, in order to realize high-speed and high-density reading, a method of reading an original image with two CCDs and connecting it to one signal to generate an image signal for one line is adopted. .

First, a description will be given with reference to FIG.

The optical lenses 10 and 11 are used to form a document image placed on a document table (not shown) on the CCDs 12 and 13. The original image is sequentially scanned by an optical system (not shown), but since such a reading technique is a known technique, detailed description thereof will be omitted.

The CCDs 12 and 14 convert the light and shade of the original image into electric signals. This electric signal is amplified by the amplifier circuits 14 and 15 and converted into a multi-valued digital signal for each pixel by the analog / digital converters (A / D converters) 14 and 15.

Furthermore, the digital signal is applied to the shading correction circuit 18, 19
After eliminating the shading caused by the light emission unevenness of the light source, the uneven light intensity distribution of the optical system, the uneven sensitivity of the CCD, etc., the binary digital image signals VD1 and VD2 signals are sent to the binarization circuits 20 and 21. Are converted to.

Binarization is performed by a method of using a constant binarization level given by the latch circuit 26, or a method of using a binarization level periodically changed by the dither ROMs 24 and 25 within a predetermined matrix size. Two types of so-called dithering binarization processing are selected and switched by the selectors 22 and 23. Dither method is 2
It is a method of reproducing halftone in a pseudo manner using a value signal and is widely used in facsimiles and the like.

In the present embodiment, an optimum copy image can be obtained by selecting a method of giving a constant binarization level to a character original or the like and a dither method to an original requiring a gradation such as a photograph. I'm running.

The dither patterns stored in the addresses given by the counter 27 that counts the number of lines in the sub-scanning direction and the counters 28 and 29 that counts the number of pixels in the main scanning direction are sequentially read into the dither ROMs 24 and 25. To combine the electrical signals read by the CCD12 and CCD13 into one line, to prevent the dither pattern from being disturbed at the joints, a latch circuit 30 is connected to the counter 29, which gives the optimum preset data to the counter 29. There is.

The latch circuit 30 and other latch circuits shown in FIG. 2 are connected to the CPU bus of the CPU 38, and the CPU 38 latches data. The CPU 38 operates according to the control program written in the ROM 39, and controls the entire reader using the RAM 40, the I / O port 41, the timer circuit 42, the serial circuit 43, and the key display drive circuit 44.

The CPU 38 carries out control for adjustment and operation confirmation according to the value set by the date switch 46.

The key display drive circuit 44 is a circuit for scanning the key matrix of the operation unit 45 and driving a display device such as an LED. Further, the serial circuit 43 is a circuit used for giving a control command to a printer or a multi-input multi-output device (Multi Input Multi Output Unit = MIMOU) and vice versa.

The oscillator circuit 32 gives timing to the CCD drive circuit 31 for driving the CCDs 12 and 13 and other parts that handle image signals. The oscillation signal is counted by the counter 33, and the count value is further input to the decoder 34 to generate various timings.

The decoder 34 generates an internal synchronization HS signal for each line in the sub-scanning direction and inputs it to the selector 35. The same sync signal BD signal (described later) sent from the printer when the printer is connected is also input to the secreter 35.
According to the procedure shown in the flow chart of Fig. 9, U38 selects BD signal when the printer is directly connected to the reader and automatically selects HS signal when the multi-input multi-output device is connected to the reader. To do. The selected signal is HSBD
It is used as a signal in the sub-scanning direction as a signal. HSBD
The signal is also input to the counter 33 and used as a reset signal for counting.

From the counter 33, the image signals VD1
Signal, the original clock of the writing clock when writing the VD2 signal is output, and the rate multiplier
It becomes the write clock WCLK signal of the memory through 36.
The rate multiplier 36 is a control signal (in this embodiment, an externally applied control signal to the input clock signal).
The frequency is divided by the value of the latch circuit 37) and output.
In the present embodiment, it is used for scaling the image in the main scanning direction.

Next, FIG. 2 (b) will be described.

The latch circuits 50, 51, 52 are the light counter 53,
Providing preset data for read counters 54 and 55. The write counter 53 uses the VD1 signal, V
The memory address for writing the D2 signal is generated by the WCLK signal from the rate multiplier 36. Reed
On the contrary, the counters 54 and 55 store the memory addresses when reading the written VD1 signal and VD2 signal from the memories 60 to 63.
It is generated by the RCLK signal (described later).

The memory address signals output from the write counter 53 and the read counters 54 and 55 are input to the selectors 56 to 59, and either the write counter 53 or the read counters 54 and 55 are selected to select the memory 60. Give to ~ 63.

The memory is a set of the memories 60 and 61 and the memories 62 and 63, and when one set is performing a write operation, the other set is performing a read operation to realize the signal speed conversion.

A set of memories repeatedly performs a write operation and a read operation, receives a signal from the write counter 53 during a write operation, and a read counter during a read operation.
Signals from 54 and 55 are given from selectors 56 to 59 to operate. Repeated control of the write operation and the read operation is performed by the HSBD signal described above.

The VD1 signal and the VD2 signal read from the memories 60 to 63 are input to the selector 70 to synthesize the VD1 signal and the VD2 signal,
Further, editing processing such as image inversion and trimming processing is performed by the image processing circuit 71 and sent to the printer or the multiple input multiple output device.

The oscillating circuit 66 generates an oscillating signal that serves as a reference timing during the read operation. The control circuit 67 uses the selector 35
This is a circuit for performing write control by the HSBD signal, and controls the operations of the left margin counter 68 and the bit counter 69 at a predetermined timing (described later).

The rate multiplier 64 and the latch circuit 65 generate the read clock RCLK signal similarly to the rate multiplier 36 and the latch circuit 37 described above.

Next, FIG. 3 will be described.

FIG. 3 is a configuration diagram showing an internal configuration example of a multi-input multi-output device (hereinafter referred to as MIMOU).

MIMO U100 with 4 readers 101-104 and 8 printers 11
1 to 118 are connected and the internal structure is shown.

MIMOU100 is a multi-input multi-output controller (Multi Input
Multi Output Controller (hereinafter referred to as MIMOC) 120, printers 111 to 118 used in a one-to-one correspondence with synchronous memory boards (hereinafter referred to as SBD) 121 to 12
8. The operation unit 147 is composed of three types of units.

The MIMOC 120 is a unit to which the readers 101 to 104 are connected, and is a serial circuit connected to the serial circuit 43 of each reader.
Serial circuit 13 that connects to 131-134 and printers 112-128
Have 5 The operation of these circuits is controlled by the CPU 140. The CPU 140 operates according to the control program written in the ROM 141 and is connected to the RAM 142, I connected to the CPU bus.
/ O port 143, interrupt controller 144, timer circuit 14
5 and the key / display drive circuit 146 are used to control the entire MIMOU 100.

From the MIMO C120, control bus CB and image bus IB as shown.
Is output to SBD 121-128.

The image bus IB is a signal bus that collectively transmits the image signals and the control signals of the image signals sent from the readers 101 to 104, respectively.

The control bus CB communicates with the printers 111 to 118 via serial signals (the printers 111 to 118 communicate with the MIMOU 100 by serial signals generated by the serial circuit 135).
This is a signal bus for the SBD control signal of the I / O port 143.

In this embodiment, the leader issues a command to start copying, and the MIMOU 100 has a slave relationship with the leader.
For this reason, since it is not known when the serial signals from the readers arrive, one serial circuit is assigned to one reader in MIMOU, and the CPU 140 handles the serial signals from all the readers. On the other hand, for the printer, since the MIMOU 100 is in a master relationship, serial signals are sequentially exchanged for each printer, so that one serial circuit 135 can exchange serial signals with a plurality of printers.

The operation unit 147 is driven by the key / display drive circuit 146 to scan the key matrix and drive the display. Operation unit 147
Details of will be described later.

The SBDs 121 to 128 are used to synchronize the output of the image signal sent from the reader and the operation of the printer. this
The SBD will be further described with reference to FIG.

FIG. 4 is a circuit diagram showing a specific circuit configuration example of the SBDs 121 to 128.

In FIG. 4, a selector 150 is a switching circuit for selecting the reader control signal assigned to the CPU 140 from the image control signals sent from a plurality of readers. The selected control signal is the write counter 151
And an address signal sent to the VE counter 152 for writing an image signal in the memories 171-178, a select signal for writing in the memory, and the like.

The selector 182 is a switching circuit for selecting the image signal of the similarly selected reader, and the selected image signal is input in parallel to the memories 171-178 and the selectors 161-168 are provided.
Is stored in the memory selected for writing.

The write counter 151 generates an address signal for writing the image signal in the memories 171-178, and this address signal is input to the selectors 161-168.

The VE counter 152 counts the control signal line (VE signal) indicating one line of the image, and the count value is the decoder.
A write select signal which is input to 153 and which of the eight memories 171-178 is to be written is generated,
Input to the secreters 161-168.

These circuits are initialized by a control signal line (VSYNC signal) indicating the start of an image sent from the connected reader. Writing to the memory, memory 171, memory 172,
Memory 173 ... Memory 177, memory 178, memory 171, ...

On the other hand, when reading the image signal from the memories 171-178, when the image signal is written in half of the entire memory, that is,
In this embodiment, it is started at the time of writing to the memory 174. This read start control signal is generated by the decoder 153 and input to the BD control circuit 154.

After the BD control circuit 154 is initialized by the VSYNC signal described above,
Until the control signal to start reading from the decoder 153,
Output of the BD signal sent from the connected printer (B
D'signal) is prohibited. When the output prohibition of the BD ′ signal is released, the BD ′ signal drives the control circuit 158 to read the memory from the memory 171, memory 172, memory 173, ... Steps are done in order like 171 …….

The oscillator circuit 155, the control circuit 158, the left margin counter 156, and the bit counter 157 are the oscillator circuit 66, the control circuit 67, and the left margin counter of the reader shown in FIG.
It has almost the same functions as the 68 and the bit counter 69. The difference is that a VE ′ signal similar to the VE signal is generated from the control circuit 158 and is input to the VE counter 180.

The VE counter 180 counts the VE ′ signal, and the count value is input to the decoder 181 to generate a read select signal indicating from which memory the read is to be performed, and the read select signal is input to each of the selectors 161 to 168.

The selectors 161 to 168 use the signals from the write counter 151 and the decoder 153, or the signals from the bit counter 157 and the decoder 181 to control writing and reading to and from the memories 171 to 178.

The image signals read from the memories 171-178 are selected by the selector.
At 185, only the image signal of the memory being read is selected and sent to the printer as a VD signal.

The control bus CB is a latch circuit 183, an interface circuit 1
84 and the control circuit 185.

The latch circuit 183 latches the select control signal to the selectors 150 and 182. This latch is performed when the control circuit 185 monitors the control bus signal and the value set by the DEEP switch 186 matches the SBD number designated by the control bus CB. The control between the MIMO C120 and the SBD is performed by the value set by the DEEP switch 186 in this way.

FIG. 5 is a diagram showing an example of the internal configuration of the printer. A description will be given with reference to FIG.

The serial signal line from the MIMO U100 or the reader is input to the serial circuit 201 and processed by the CPU 200. CPU200 is ROM
Operated by the control program stored in 203, RAM20
4. Use the timer circuit 202 and I / O port 205 to control the entire printer.

The input interface 207 performs input processing of sensor signals such as paper detection in the printer. The drive circuit 208 is
This is a circuit for driving a motor, a high-voltage transformer, etc. not shown. The display circuit 206 is used to display the printer status such as print paper pear and jam occurrence.

The VD signal (image signal) sent from the MIMO U100 or reader is input to the laser driver 209 and the semiconductor laser 2
At 10, it is converted into laser light based on the VD signal. The laser light is focused by the collimator lens 211, and is scanned by the polygon mirror 212 in a direction substantially parallel to the rotation axis of the photosensitive drum 214 which is rotating in a predetermined manner. The scanned laser light is corrected in light quantity by the f-θ lens 213 and is irradiated onto the photosensitive drum 214 to form a latent image by a VD signal.

The image formation of the printer uses a so-called electrostatic recording method, in which a necessary portion of the electric charge applied on the photosensitive drum 214 is removed with a laser beam, and a developing agent is applied to this to perform a development process, and then a print sheet is formed. This is done by transferring and fixing. Since the electrostatic recording method is a well-known technique, detailed description will be omitted.

The laser beam scanned by the polygon mirror 212 is emitted from the optical fiber 2 before being irradiated on the photosensitive drum 214.
When the photodetector 216 is incident on the optical axis 15, the photodetector 216 outputs an electric signal (BD signal) when detecting the incident. As can be seen from FIG. 5, from the reader or MIMOU 100, if the VD signal is output after waiting the time from the BD signal generation until the laser light reaches the photosensitive drum 214, it is possible to obtain a proper signal on the photosensitive drum 214. A latent image will be formed at the position.

The timing chart of FIG. 6 specifically shows the output timing of this VD signal.

An example of a reader is shown in FIG.
The same is true for MOU.

In FIG. 2 (b), when the HSBD signal is generated by the BD signal generation, the left margin counter 68 starts counting, and when the count-up corresponding to the above-mentioned time is reached, the bit counter 69 is operated and the memories 60 and 61 are operated. Or memory
Start reading VD signals from 62 and 63. The bit counter 69 displays V over the image-formable section of the photosensitive drum 214.
After outputting the D signal, the operation is stopped to prepare for the input of the BSBD signal based on the input of the next BD signal.

The VE signal is a section signal indicating a period during which the bit counter 69 is operating. The VE signal is used for the operation of the MIMOU, the operation of the VE counter 152, and the operation control of the write counter 151. In MIMOU, VE ′ generated by control circuit 158
The signal is similar to the VE signal.

FIG. 7 shows an operation unit provided in the reader connected to this system in this embodiment. The operation part is the standard operation part 25
2 and preset operation unit 251, LCD display unit 256 and soft key 2
The special operation unit 250 having 57 is provided. Standard operating part 252
Is equipped with a number setting numeric keypad 254, a set number display section 255, a copy start key 253, and the like, and is used in the same manner as a commonly used copying machine.

The special operation section 250 is for the user to create an arbitrary copy mode, and label display corresponding to the soft key,
It has a liquid crystal display 256 that can display copy mode, data and various messages, and six soft keys 257. When you want to select the content displayed on the liquid crystal display 256, the soft key corresponding to the lower side of the display you want to select You can create a copy mode etc. by pressing.

For example, of the paper sizes displayed on the liquid crystal in sequence, the required paper size can be selected by the soft key below the size display. In addition, the liquid crystal display 256 has a standard operation unit 2
Information that cannot be displayed by 52, for example, information such as how many printers are being used can be displayed during copying using a plurality of printers simultaneously.

The preset operation unit 251 is a standard operation unit 252 or a special operation unit 25.
The copy mode (condition) set by 0 can be registered. That is, the copy mode that is frequently performed is RAM4.
By registering in advance to 0 and reading the copy mode from the memory with one key operation without using the special operation section 250, the desired mode can be easily copied.

FIG. 8 shows an example of the operation unit provided in the multi-input multi-output device. The operation panel 300 is located on the front surface of the multi-input multi-output device. (Refer to FIG. 1) A power LED (light emitting diode) 301 is an LED that indicates that the multi-input multi-output device is powered on. If the power is on, it lights up, and if not, it goes off. is doing.

The lighting of the ready LED 302 indicates that the multi-input multi-output device can operate without any abnormality inside. The reader number 1 to 4 and the printer number 1 to 8 can be connected to four readers and eight printers in the multi-input multi-output device of this embodiment. The number of each LED and switch (303
To 338) indicate information of the reader and the printer corresponding to the numbers given above the respective parts.

For example, LED303, LED307 and switch 311 show information about the reader 101, LED325, LED333 and switch 317,
This section gives information about the printer 113.

The multi / single LEDs 303 to 306 are either the multi mode (lit) or the single mode (flashing) for the reader with the corresponding number.
Indicates Further, when the corresponding reader is not connected or the power is not turned on, the light is turned off.

The copying LED (307 to 310) indicates that the reader is in the copying operation, and is turned on during the operation and turned off during the stop.

The active printer switches (311 to 314) are in the copying operation by the corresponding reader, that is, in the process of reading a document and copying.
When the button is pressed while 310 is lit, the connect LEDs (323 to 330) of the corresponding printer blink to indicate the printer that is outputting the copy while the button is being pressed.

The printer connect switch (315 to 322) is a switching switch that selects whether or not to automatically enable it by the multiple input and multiple output device when the corresponding printer is in the copy ready state. Separate connector LE
It is indicated by D (323 to 330). The connect LEDs (323 to 330) are repeatedly turned on and off each time the switch is pressed once. Then, when the LED is lit, it indicates that the printer is controlled by the multi-input multi-output device and the copy operation is possible, and when the LED is off, the corresponding printer is switched from the multi-input multi-output device. Indicates that control is not possible. Further, as described above, the LEDs (323 to 330) blink when the operating printer switch of the reader is pushed down during copying.

The printer-specific ready LEDs (331 to 338) indicate whether the printer is ready for copying. If the printer is capable of copying, it will light regardless of the status of the connect LED. On the other hand, it flashes if an error such as a jam has occurred in the corresponding printer. Further, it is turned off when the printer is not connected or the printer is not powered on.

There are two methods of connecting each device: a method of connecting to a printer through a reader and a multi-input / multi-output device, and a method of connecting only a reader and a printer. To do. As described above, since the reader and the multi-input multi-output device are connected via the serial circuit to which individual numbers are assigned, the multi-input multi-output device handles the number as a unique number of the reader. .
As described above, the connection between the multi-input multi-output device and the printer is
Since they are connected via each synchronous memory board, the multi-input multi-output device handles the value of the display switch 186 on the synchronous memory as a printer-specific number.

When the reader is connected to the printer through the multi-input multi-output device, the reader can select either the single mode or the multi-mode print mode.

The single mode is the same mode as when only the reader and printer are connected, and the printer with the same number as the unique number assigned to the reader is connected with multiple input and multiple output devices. In this mode, the reader receives the printer alone through the multi-input multi-output device.

On the other hand, the multi-mode is a mode in which one reader can be connected to a plurality of printers via a multi-input multi-output device. The printer is designated by the operation unit of the reader or in the mode in which the multi-input / multi-output device is operated. In the latter case, the multi-input multi-output device operates by appropriately selecting the required number of printers that can operate according to the set number of prints. As for each status in the multi-mode, the multi-input multi-output device assembles information of each printer into a required format and sends it to the reader.

In this multi-mode, when some of the printers that are operating become inoperable, the other printers that can operate are made to perform the printing and the desired printing is achieved in the "ALL" mode. There is a "sort" mode in which all printing operations are prohibited when at least one of the plurality of operating printers becomes inoperable.

That is, in the multi mode of the "sort" mode, the correction operation in which the printing of the inoperable printer is automatically performed by another printer is prohibited.

Therefore, in the "sort" mode, it is possible to obtain a collated print output, that is, a sorted print output, without overlapping each printer output.

In the following, the control when the reader / printer is directly connected in a one-to-one manner is similar to the control in the single mode using the multi-input multi-output device. To do. The difference between the single mode and the multi mode will be described in each case.

An example of multi-mode setting in the special operation section 250 of the reader will be described below with reference to FIG. In FIG. 14, 256 is a liquid crystal display, 257 is 6 soft keys (hereinafter referred to as SK
It is).

When the power is turned on, the liquid crystal display unit 256 displays (1) in FIG. 14 (a).
Is displayed. Here, "Henshin Una !!" displayed corresponding to SK1 and SK2 indicates that no edit mode is currently set.

The details of the edit mode are omitted, but when SK1 or SK2 is pressed here, the scene of the liquid crystal display changes and the edit mode can be set. "100% * 100% !!" displayed corresponding to SK4 to SK5 indicates that the copying magnification in the main scanning direction and the sub-scanning direction is 100%, that is, the same magnification. If you press SK4 or SK5 here, the LCD display will change and you can set the magnification from 50% to 200% in 1% increments in each of the main scanning and sub-scanning directions. Omit it. When SK6 corresponding to "ETC" (abbreviation of ethosetra) is pressed in (1) of FIG. 14 (a), the display changes as shown in (2) of FIG. 14 (a).

The "single !!" displayed corresponding to SK1 in (2) of Fig. 14 (a) is only for printers under the control of this reader, to which MIMOU100 is connected to this reader.
This indicates that the image transmission mode via MIMOU is set. If this reader is directly connected to the printer without going through the MIMOU, that is, if it is configured as a stand-alone type, the liquid crystal part corresponding to SK1 will be displayed as shown in (3) of Fig. 14 (a). Is not displayed. In addition, "MODIGENKO !!" displayed corresponding to SK3 and SK4 in (2) of Fig. 14 (a) is a character original, and it is a mode that reproduces the read image in binary without considering the halftone. If you press SK3 and SK4, it will be displayed on the top of SK3 and SK4 as "Shashin !!" (not shown), but the scanned image will be changed to the mode for halftone processing using the dither method. To be done. "Positive !!" displayed corresponding to SK5
Is a positive thing, and the normal copy operation is executed in this state, but if you press SK5, you can change to the copy mode in which "Negative !!" is displayed corresponding to SK5 and black and white is reversed, though not shown. When SK6 corresponding to "ETC" is pressed, the LCD display 256
Is displayed as in (4) of FIG. 14 (a).

In the (4) of Fig. 14 (a), "TOROKU" displayed corresponding to SK1 means registration, and when SK1 is pressed, the copy mode is registered at any location of the nine preset keys 251 at that time. Will not go into detail here.

SK6 corresponding to "ETC" in (4) of Fig. 14 (a)
When is pressed, the liquid crystal display returns to (1) in FIG. 14 (a) again.

Now, when you press SK1 corresponding to "Single !!" in (2) of Figure 14 (a), the liquid crystal display will show (5) in Figure 14 (a).
Change to. Here, SK corresponding to "CLR" (abbreviation for clear)
By pressing 6, the scene can be returned to (2) in Fig. 14 (a).

"Multi?" Corresponding to SK3 indicates that the multi mode is not currently set, and SK corresponding to "Multi?"
It also shows that you can press 3 to set multi-mode.

Currently, only the printer under the control of this reader, that is, the transmission mode to the printer having the same unique number as this reader, is displayed, and "single !!" is displayed corresponding to SK1.

When SK1 corresponding to “single !!” in (5) of FIG. 14 (a) is pressed, the scene returns to (2) of FIG. 14 (a), and the single mode is set. MI in single mode
Even though the printer is connected via the MOU100 and the image data is sent from the reader to the printer via the MIMOU, the user operates the printer like the stand-alone type.
That is, the cassette size for storing the recording paper is also the standard operation unit 252.
The upper and lower tier switching keys 259 of the cassette are used to switch and select the upper and lower tiers. At this time, as shown in FIG. 15, one of the upper and lower LEDs 260 is lit, and the size LED 258 corresponding to the size stored in the tier is lit or blinks.

It corresponds to "multi?" In (5) of FIG. 14 (a).
When SK3 is pressed, the liquid crystal display changes to (7) in Fig. 14 (a) and a message is displayed to select the cassette size. If none of the printers connected via the MIMOU is in a printable state, that fact is displayed as shown in (6) of FIG. 14 (a). The display of (6) of FIG. 14 (a) is changed to the display of (2) of FIG. 14 (a) when the clear key of the standard operation section 252 of FIG. Return.

The display of (7) in FIG. 14 (a) becomes, for example, as shown in (8) of FIG. 14 (b) after a predetermined time or by the clear key.

The display of (8) in FIG. 14 (b) shows the usable cassette size set in the usable printers among all the printers managed by MIMOU100. If there is a desired size among the sizes initially displayed, pressing the corresponding soft key SK below the size display causes the liquid crystal display to become (10) in FIG. 14 (b). On the other hand, if there is no desired size among the displayed sizes, press SK5 corresponding to "ETC", which is not shown here, but if there is a size that cannot be displayed the first time, the size will be It is displayed in the same manner as (8) in Fig. 14 (b). Similarly, press SK5 corresponding to "ETC" until the desired size is displayed and search. When the usable sizes are displayed in a row, the display is returned to the initial display (for example, (8) in FIG. 14 (b)).

If SK6 corresponding to "CLR" is pressed during this size selection, the liquid crystal display returns to (5) in FIG. 14 (a). If the size has already been set last time, instead of (8) in FIG. 14 (b), for example, (9) in FIG. 14 (b) is displayed. (9) of FIG. 14 (b) is an example when A4 was selected last time.
“!!” is displayed instead of “!!” and “?” To indicate that fact.

Now, when you have selected the desired size, the LCD display
The display of (10) in FIG. 10B is displayed, and a message is displayed to the operator to select the printer to be used.
This message is cleared after a certain period of time managed by the CPU or by pressing the clear key shown in FIG. 7, like the message shown in (7) of FIG. 14 (a), and the liquid crystal display is shown in FIG. 14 (b), for example. It becomes like (11).

FIG. 14 (b) (11) displays the number of the printer having the cassette size selected in the above procedure. When SK6 corresponding to "CLR" is pressed here, the liquid crystal display returns to the display of (5) in FIG. 14 (a), and a new mode can be set. In FIG. 14 (b) (11), the number after the "#" mark displayed corresponding to SK2 and SK3 indicates the unique number of the printer. The "?" Mark after the number indicates that the printer of that number is not yet selected as the destination. Of the displayed printer numbers, it has the same number as this reader, and the "#" mark of the printer number in single mode of this reader repeats blinking. For example, when the printer corresponding to the single mode of this reader is # 1, the "#" mark on the # 1 display of (11) in FIG. 14B repeats blinking.

The information that the printer is a single mode printer is
In serial communication between MOUs, it is obtained by the printer information status bit 5 in Table 2-10 from MIMOU to the reader in response to the printer information request command in Table 1 from the reader to MIMOU.

"AL" displayed corresponding to SK1 in (11) of Fig. 14 (b)
L "is the MI for all printers with the selected cassette size as the destination, or for any printer.
It is a mode that leaves it to the judgment of the MOU. For example, now 3 printers are connected to MIMOU and their number is 1,
In 2,3, the selected cassette size, for example A4 is the number 1,2
14 (b) (11) if it is set in the printer.
Is displayed. If you want to send to # 2, press SK3 corresponding to “# 2?” And the display will show “# 2 !!” and “?” As shown in (12) of FIG. 14 (b). Indicates that the printer # 2 has been set as the destination instead of the "!!" display. If this is okay, press SK5 corresponding to "OK" to complete the setting of multiple stations mode.

Also, for example, three printers # 1, # 2, and # 3 are connected to MIMOU, and the selected cassette size, for example, A4, is # 1 and # 3.
If there is only 3, display after (10) in Fig. 14 (b).
It is displayed as (13) in Fig. 14 (b). Any printer is acceptable as long as it is printed out in A4 size here.
Or use all available printers as soon as possible,
SK corresponding to "ALL" when you want to finish copying
Press 1. Then, the display becomes as shown in (14) of FIG. 14 (b), showing that "ALL" has been selected. If this is OK, press SK5 corresponding to "OK" to complete the multi-mode setting.

To sort using a predetermined number of printers, press SK4 corresponding to the display "sort". As a result, the display becomes (15) in Fig. 14 (b),
Indicates that "sort" has been selected. And if this is OK, press SK5. Note that the difference between "sort" and "ALL" is that the processing is different when an error occurs in any of the printers in use, and this will be described in detail later in error processing.

From (11) in FIG. 14 (b) to (14) in FIG. 14 (b), it is possible to display all of the printer numbers to be selected in one scene display, but the number of printers is large. If you need 2 or 3 scenes, it is not shown here,
It can be displayed one after another using "ETC". In such a case, the option "ALL" is particularly effective.

By pressing SK5 corresponding to "OK" in (12), (14) or (15) of Fig. 14 (b), the multi-mode setting is completed and the liquid crystal display 256 displays (14) in Fig. 14 (b). As shown in 16), “single !!” in (2) of FIG. 14 (a) is replaced with “multi !!”, indicating that the multimode is set. Also, the cassette size display is
As shown in Figure (c), the selected size A4 is displayed, and in order to distinguish between the single mode and the multi mode, in normal single mode, it lights up as shown in Figure 15 (a) or Figure 15 (b). The LED 260 indicating the upper / lower stage is turned off as shown in FIG. 15 (c). Therefore, in this case, the upper / lower switching key 259 cannot be accepted.

With reference to Table 13, operations of the reader, multi-input multi-output device, printer each device and communication between each device at the time of image forming operation (hereinafter referred to as copy operation) by this system will be described.

In the table, the operation in the reader and the operation of the reader are shown, is the communication between the reader and the multi-input multi-output device, is the operation of the multi-input multi-output device, is the communication between the multi-input multi-output device,
Indicates the operation of the printer. In the implementation system,
Information exchange between each device (reader and multi-input multi-output device, multi-input multi-output device and printer) is mainly performed by serial signal communication except for image information.

In serial communication, the leader takes the initiative between the reader and the multi-input multi-output device, and the multi-input multi-output device takes the initiative between the multi-input multi-output device and the printer.

The person who has the initiative detects whether or not the other party can receive the serial signal (depending on the other party's power-on signal, ready signal, etc.), and outputs various commands in serial code if communication is possible. Then, the receiving side receives the above-mentioned command, checks for a parity error, etc., and if the command is valid, sends back information corresponding to the command. If the command requests the receiving side to perform some operation, the corresponding operation is performed.

Communication is performed in a one-to-one system in which the person who has the initiative outputs an instruction code (called a command), and the receiving side always sends back information (called a status) corresponding to the instruction code.

Hereinafter, a detailed description will be given of the operation and communication of each part shown in Table 13.

Table 1 shows status request commands for requesting printer information. When the multi-input multi-output device or printer receives the status request command, it returns a status signal corresponding to each status request command shown in Tables 2 to 11 to the reader. Table 2 shows the command error status returned when the received command is invalid. In case of a parity error, bit 6 is set.

Table 3 shows the status of the printers to which each reader corresponds in the single mode, and the general status of the printers available and the printers in use in the multi mode. A print request, which is a paper feed enable signal, is set when all printers in use can feed paper. During paper transport of bit 5, if any of the printers in use is transporting paper, it is set. Misprint, waiting (while the fuser is warming up), pause (shut-off and power saving), and call error (operator call or serviceman call error) 4,3,2,1 are printers in use Set when all errors occur.

Tables 4 and 5 show details of the operator call error and the service man call error, respectively, and the bit corresponding to each error of each drive unit and process unit is set when the error occurs.

Table 6 shows the number of resend requests generated due to jams and misprints.

Tables 7 and 8 show the paper sizes of the printers corresponding to the single mode.

Table 9 shows the application status, which informs the reader by the bit 2 whether or not the multiple unit is connected. When the printer is directly connected to the reader, the presence of the multiple unit in bit 2 is set. Has been done.

Table 10 shows the printer status designated by the printer information request status. The printer ready of bit 6 indicates that the corresponding printer can copy, and
The my printer in bit 5 indicates that the printer has the same number as the reader that requested the information. Bits 4, 3, 2, and 1 indicate the respective cassette sizes.

Table 11 shows the number of sheets fed in one copy. The final paper feed indicates that the printing of all the instructed number of copies has been completed. The resend request in bit 5 indicates that a jam or misprint has occurred and a resend request for the image information has occurred in any of the printers in use. As for the number of sheets, the number of sheets requested to be retransmitted is requested by the request.

Table 12 shows the execution commands that prompt the printer to execute. When the execution command is output, the MIMOU or printer returns the overall status shown in Table 3.

Reference numeral 1 is a copy start command requesting the printer to start a copy operation, 2 is a printer stop requesting a copy operation stop, and 3 and 4 are paper feed instruction commands for instructing the paper feed cassette direction in the single mode. A copy number instruction command 5 indicates the number of copies of one document. A multi-instruction command 6 sets the printer number to be used in the second byte for each bit of the first byte (printer 1 is the first bit and printer 2 is the second bit). Reference numeral 7 is an instruction command indicating that the reader operates in the single mode. Reference numeral 8 is a command for instructing the paper size, which is output from the reader in the multi mode. 9,
Reference numeral 10 is a command for instructing the start and stop of the shutoff, respectively. This shutoff will be described later. Reference numeral 11 is a command for instructing sort, which is output before the drum start when the sort selection described above is made.

The serial communication between the reader and MIMOU using each command described above will be further described below with reference to the flowchart of FIG. In this embodiment, from the reader to MIMOU
As the serial commands to the, there are a status request command and an execution command as shown in Tables 1 and 12.

First, when the copy sequence is not being executed and there is no key input, the communication as shown in FIG. 16 (a) is performed before the communication shown in Table 13. Also, the HSBD signal is selected according to the flow chart of FIG.

First, the reader outputs the application status request command and inputs the application status (S16-
Information about whether MIMOU is connected is obtained by 1). After the execution command check (S16-2) described later, when MIMOU is connected, the printer information request command is output eight times corresponding to the number of MIMOU printers that can be connected, and the number of printers becomes printable. Yes, the number of the single mode printer, and the number of the printer having the upper / lower tier and the size of the paper are obtained (S16-4,5). When MIMOU is not connected, it is a stand-alone type and the reader and printer are directly connected without going through MIMOU. Therefore, the upper cassette status request command and the lower cassette status request command in Table 1 are used. The upper / lower cassette size is known from the output of (S16-6).

After obtaining the paper size information etc. when the above MIMOU is connected or not connected, and after the execution command check, by the overall status request command in Table 1,
Get the overall status (S16-7). However, at this stage, since the copy sequence is not being executed yet, it is determined only by the overall status whether or not there is a call error (S16-8). If there are no call errors,
After the execution command check, the process returns to the application status request of S16-1, and these steps are repeated.

If there is a call error, the serviceman call error request command in Table 1 is used to obtain detailed information on the serviceman call error (S16-9). Further, the operator call error request command in Table 1 is used to obtain the details of the operator call error (S16-10). After that, the process returns to (S16-1) again, and so on.

The above is the procedure of the serial communication when the normal sequence is not being executed. In addition to these status request commands, there are some execution commands shown in Table 12. These execution commands are, for example, as shown in FIG.
(S16-1), (S16-4), (S16-6), (S16-
7), (S16-9), (S16-10), etc., the status command is output, and then the execution command is prioritized and output is checked in the procedure of FIG. 16 (b).

In the execution command check, first, as shown in FIG. 16 (b), it is checked whether or not the copy start key is pressed (S16-11). When the copy start key 253 is pressed, the error processing 3 of the flow chart of FIG. 17-2 is executed. More on this later.

If the copy start key 253 is not pressed, it is determined whether the cassette upper / lower switching key 259 is pressed, or whether the cassette needs to be switched by selecting the preset key or the reset key (S16-12). ).

If it is necessary to switch the cassette, it is determined whether the mode is the multi mode or the single mode (S16-15).
In the multi mode, the upper / lower switching is not performed, but in the single mode, the upper sheet feeding instruction command or the lower sheet feeding instruction command in Table 3 is output and the overall status is input (S16-16), and then The normal serial sequence of FIG. 16 (a) is continued. If it is determined in (S16-12) and (S16-15) that it is not necessary to switch the cassette,
Check to see if there is a multi / single change (S16-13). When there is a change, depending on the change,
After outputting the multi-instruction command or single-instruction command in Table 12, input the overall status (S16-14), then first
6 Continue with the normal serial sequence in Figure (a). (S
16-11), (S16-12) and (S16-13), if there is no execution command to be output, the next step of the normal serial sequence of FIG. 16 (a) is output without outputting the execution command. Run.

In this way, the communication before the normal sequence is completed and the
13 The operations shown in the table can be executed.

Next, the communication operation during the copy sequence will be described.

As shown in Table 13, in the copying operation in the multi-mode, first, the operator inputs various image forming conditions such as the paper size and the number of copies from the operation unit, and when the copy key is pressed, the reader operates. For MIMOU, paper size,
Notify the printer number and the number of copies by communication.

When the multi-input multi-output device receives the paper size, printer number, and number of sheets, it checks each printer connected to MIMOU (however, if it is the printer specification mode, only the specified printer is specified), and the specified printer is specified. Calculate the number of printers with different paper sizes. Then, the number of copies is checked to calculate the required number. When the required number is calculated, the cassette stage of the required paper size is designated for each corresponding printer by communication with the printer.

Next, the reader sends a copy start command to the multi-input multi-output device after instructing the paper size and the number of copies.

Upon receiving the copy start command, the multi-input multi-output device transmits a copy start to each printer for which the paper size cassette instruction has been completed.

When each printer receives the copy start, it starts the operation of each part of the printer, and if it becomes possible to receive the image signal according to the conditions of each printer, it sends a signal indicating that the image signal can be received to the multi-input multi-output device. Send to

The multi-input multi-output device waits until all the printers necessary for printing have transmitted the image signal reception permission, and when all the printers are ready to receive the image signal transmission, transmit a signal indicating the image signal reception permission to the reader.

When the reader receives the reception of the image signal, the reader starts reading the document and transmits the image signal to the MIMOU.

MIMOU sends image signals to all printers in use at the same time.

Each printer receives the image signal and makes a copy according to the operation procedure of the printer.

When the multi-input multi-output device finishes copying, it sends the number of copies created in one operation to the reader, and
First, it checks whether or not the number of sheets designated by the reader has been reached, and when all the sheets have been finished, the leader is notified by communication of the end of the first copy.

However, if the copying of the designated number of sheets is not completed, a copy start signal is transmitted again to the required number of printers, and all printers wait until the image signals can be received.

The reader counts down the number of copies when the number of copies is sent from MIMOU by communication. And
Next, when the image signal receivable signal is received from the multi-input multi-output device, the reading of the same original document is started again. The reader continues this operation until it receives a command to end the final copy.

Upon receiving the end of the final copy, the reader sends a signal indicating the printer stop to MIMOU by communication.

When MIMOU receives the signal indicating the printer stop from the reader, it sends the printer stop to all the printers in use by communication. Upon receiving the printer stop command, the printer stops the operation of each part of the printer.

The copy operation in the single mode is for a specific printer.
, Is used. That is, there is no need for communication relating to printer designation and sheet count calculation when a plurality of printers are used.

Next, an example of a serial communication sequence in the reader unit during execution of the copy sequence will be described using the flow of FIG.

When it is found that the copy start key is pressed in the execution command check described above, it is first determined whether or not the mode is the multi mode (S10-1). Single mode when MIMOU is connected or stand when MIMOU is not connected
If it is the Aron type, it immediately outputs a copy start instruction command to the MIMOU or printer and inputs the overall status (S10-16). After that, (S10-17) to (S10-21) described below are repeated until the copy is completed.

First, it checks whether or not the printer is ready for copying (S10-17). When the printer cannot run the copy operation because there is no paper, a paper jam, or some other abnormality, the printer stop instruction command is immediately output (S10, 22). If the printer is ready for copying, then the status of the reader is checked (S10-18). When the copy operation is interrupted by pressing the stop key 261 or the interrupt key 262, or when the copy operation cannot be continued due to some abnormality in the reader, the printer stop instruction command is immediately output (S10-22). .

If neither the printer nor the reader has a cause of interruption or cancellation of copying, it is checked whether or not the optical system is at the reverse position (S10-19). If the optical system is not at the reverse position, repeat the above steps (S10-17) and (S10-18) until the optical system reaches the reverse position.

Unlike the multi-mode described later, one printer is a stand-alone or MIMOU directly connected to the reader.
However, in the single mode in which the reader outputs data to the printer under its control, the printer feeds one copy sheet each time the optical system of the reader scans the document once, and outputs it. Therefore, when the optical system reaches the reverse position in (S10-19), the number displayed on the seventh set number display section 255 is counted down by one and displayed (S10-20).

If the display after the countdown is not 0, that is, the set number of originals has not been scanned, the process returns to (S10-17) again to continue copying, while if the display is 0, that is, the set number of originals has been scanned, the printer Output the stop instruction command to capture the overall status (S10-21, S10-
twenty two).

After the series of copying operations are normally ended, abnormally ended, or canceled as described above, the reader outputs the requested number of resends to the printer or MIMOU by the resend requested number request command in Table 1 (S10- twenty three). Naturally, the number of re-transmission request sheets is given as 0 in the case of normal end, but the number of incomplete copies other than 0 is given in case of abnormal end due to paper jam or the like.

Here, if the set number of sheets-the number of sheets to be fed + the number of sheets requested to be retransmitted is Q (S10-24), and if Q = 0 (S10-25), all the set number of sheets have been completed, so the set number of 7-segment display is displayed. Department
The set number is displayed on 255 (S10-26), and if Q ≠ 0, Q
Display the number of remaining sheets to be copied (S10-2
7).

With the above, the serial communication in the copy sequence in the stand-alone or single mode and the display of the number of sheets are completed, and the process returns to FIG. 16 (a) again to execute the serial communication in the copy key waiting state.

Now, description will be given of the case where the multi-mode is determined in FIG. 10 (S10-1). In multi-mode, first 12th
The front paper size instruction command was output (S10-2), and then the copy set number instruction command was output (S10-3).
Then, a copy start instruction command is output (S10-
4). MIMOU is mainly used for effective use of multi-mode
Among multiple printers that can send image signals from the reader via (A) specified according to its location, copy speed, toner color of the developing device, cassette size owned, dual-sided printer, etc. , When the reader selects and transmits one of the printers, (B) when the reader selects and transmits a plurality of specific printers satisfying the above conditions, and (C) when one or more arbitrary printers satisfying the above conditions are satisfied. A case where MIMOU selects and transmits may be considered, but in the present embodiment, since MIMOU controls the number of sheets in the multimode with emphasis on (C) including (A) and (B). , At the start of copying, the reader sends the set number of sheets to MIMOU, and scans the optical system based on the information from MIMOU as described below.

After outputting the copy start instruction command in FIG. 10 (S10-4), the reader executes the following serial communication sequence in the multi mode.

First, it is checked whether at least one of the printers specified as the transmission destination at the start of copying can continue the copying operation (S10-5). If all the printers cannot continue the copy operation for some reason or if there is an error in MIMOU, the printer stop instruction command is output (S10-22).

On the other hand, if at least one printer is ready for copying, the reader side checks whether or not there is a factor for interrupting or canceling the copying operation (S10-6). If the reader is abnormal or the stop key 261 or the interrupt key 262 is pressed, the printer stop instruction command is output (S10-22).

If there is no factor to stop or interrupt the copy operation on both the printer side and the reader side, the optical system of the reader unit finishes scanning the original,
Check to see if you have reached the reverse position (S10-7).
If you are still scanning the original and it has not reached the reverse position, press (S1
Return to 0-5). When the reversal position is reached, the sheet number request command in Table 1 is used to obtain information on the number of sheets to be fed, whether or not it is the final sheet feeding, and whether or not there is a resend request due to factors such as a paper jam (S10- 8).

Unlike in single mode, the reader basically does not need to know which printer or how many printers output images, and even if some printers go down, MIMOU sets the number of sheets initially set. Since the number of sheets is appropriately distributed until the document is exhausted, the reader inquires to MIMOU when the optical system completes one original scanning, how many sheets are fed in total during the scanning. The number of fed sheets obtained in (S10-8) is subtracted from the number displayed in the number display section 255 and displayed as a new remaining number to be executed (S10-9).
Next, it is checked whether the newly displayed number is 0 (S10-10). If it is not 0, that is, if the set number of sheets has not been fed, it is checked whether or not the resend request flag in the fed sheet number status fetched in (S10-8) is set (S10-14).

If there is no resend request, return to (S10-5) again, and if there is a resend request, send the resend request number request command in Table 1 to MIMO.
After outputting to U and fetching the number of resend requests (S10-
Return to 5).

In FIG. 10 (S10-10), when the display is 0, it is checked whether the final paper feed flag in the paper feed status fetched in S10-8 is on (S10-1).
1).

After displaying 0 sheets, that is, the set number of sheets, MIMOU
If it is determined that the sheet is the final sheet, the printer recognizes that the sheet is normally completed and outputs a printer stop instruction command (S17-22).
If some of the printers selected as the destinations at the start of copying have a paper jam error and cannot continue the copy operation, some of the papers fed by that printer will not work normally. Not printed out.
Therefore, in such a case, although it was confirmed in (S10-10) that the set number of sheets were fed (S10-11)
In the case of (S10)
-14) and (S10-15), the number of resend requests taken in is displayed on the number display section 255, and then the process returns to (S10-5).

However, in the sorting mode, the above-mentioned automatic correction is not performed, and if an error occurs even with one printer, printing is disabled.

When the copy output for the set number of sheets is obtained, all the printers initially selected as the destinations go down, the reader goes down, or the stop key or the alternate key is pressed, the printer stop instruction command is output (S10-22). . Hereafter, the same processing as in single mode [(S10-23) to (S
10-27)] and then return to FIG. 16 (a).

FIG. 11 shows the MIMOU during the image forming operation shown in Table 13.
The operation of the microcomputer of is shown. However, in multi-mode, it starts from SP201, and in single-mode, it starts from SP207. When the paper size and printer number instructions are received from the reader by communication, the paper size of each printer is checked (S11-1, S11-2). In this case, in the printer designation mode, only the designated printer is checked, and in the non-designated mode, all the printers are checked.

In this system, MIMOU and the printer always exchange each information by communication, and since the information is stored in RAM (random access memory), it is possible to check the paper size by checking the information. Can be identified. The paper sizes of all available printers are checked, and if there is no designated paper in any of the printers, the paper out is sent to the reader (S11-3, S11-4).

If a printer having the required paper size is connected, the number of copies is received (S11-5).

The number of received copies is compared with the number of printers having a required paper size to calculate the required number of printers (S11-6). In this case, the printer in operation is disabled and removed from the number of printers used for comparison.

When the copy start is received from the reader, the copy operation start is instructed to each printer corresponding to the calculated number of printers (S11-7, S11-11). However, in the single mode, a specific printer is instructed to start the copy operation. However, when that particular printer is being used in multi-mode by another reader, it does not immediately switch to single-mode, but it sets the single-mode request flag and executes the copy operation currently being executed. Wait for the end of (S11-9, S11-10).

When each printer starts the copy operation and becomes ready to receive the image signal, and when all the printers that have received the notification from the respective printers and instructed the copy operation are ready to receive the image signal, the image signal ready is sent to the reader ( S11-12, S11-13).

The received image signal is sent to each printer at the same time without passing through the microcomputer. A copying operation is performed in each printer, and MIMOU detects whether or not a copying error due to an error occurs in each printer, calculates the number of copies, and sends it to the reader (S11-5, S11-16, S11-20). However, in the single mode, the copy operation is repeated until the printer stop is received (S11-19).

However, if a single-mode reader issues a copy request during multi-copy and the single-mode request flag is set, MIMOU switches to single-mode after copying one image to the printer ( S11-21, S11-22). Therefore, the printer receives the image of the single mode reader and performs the single mode copy operation from the next one image copy operation.

Then, in the reader during the multi-mode copy operation, at the start of the copy operation, it is compared with the number of copies received from the reader, and if the instructed number is not reached, the required number is calculated again and the copy process is restarted ( S11-23, S11
-24). However, the printers switched to the single mode copy described above are not included in the available printers,
It will not be included in the calculation of the required number.

When the designated number of copies are completed, the final copy end information is sent to the reader, and when the printer stop is received,
The printer stop is transmitted to all the printers to end the series of operations (S11-25, S11-26, S11-27).

FIG. 12 shows the operation of the microcomputer of the printer during the image forming operation shown in Table 13. When the copy start is received from MIMOU, the printer starts the operation of each unit according to the defined sequence (S12-2).

In this system, since the electrostatic recording type printer using the drum is used as described above, pretreatment such as drum charging is required. Therefore, wait until the preprocessing is completed and paper can be fed, and if it is possible, before copying starts.
Feeding starts from the cassette specified by MIMOU (S12
-3, S12-4).

Wait until the fed paper reaches the image signal receivable position (S12-5).
Output to IMOU (S12-6).

When the image signal is input, a series of copying operations such as development, transfer to paper, and discharge to the outside of the printer are performed (S12-7, S12
-8).

Then, it is detected whether an error has occurred in a series of copy operations, and the information is transmitted to MIMOU (S12-9,
S12-10).

After that, when the printer stop is received, each part of the printer is stopped and a series of copying operations are completed (S12-11, S12-
13) When the copy start is received, the next copy is started (S12-12).

FIG. 13 shows the operation of the microcomputer controlling the operation part of the MIMOU described in FIG. 8, which will be described below.

The operation is divided into display processing for each reader (S13-1) and display processing for each printer (S13-2). As described above, the same display processing is performed for four readers and the same display processing is performed for eight printers. Is repeated.

As shown in FIG. 13 (b), the process for each reader detects whether each reader is connected first, and if the reader is not connected or the power is not turned on, multi /
Both the single LEDs 303 to 306 and the copying LEDs 307 to 310 corresponding to the reader are turned off to finish (S13-3, S
13-4).

Next, follow the instructions from the reader and follow the instructions on multi / single LED3
03 to 306 are turned on or off respectively (S13-5). If copying is in progress, the copying LEDs 303 to 310 are turned on (S13-7), and if copying is not in progress, copying LEDs 307 to 310 are performed.
Is turned off (S13-8).

As for the printer, as shown in FIG. 13 (c), first, for each printer, it is detected whether the printer is connected and the power is turned on (S13-9). If either is not done, connect LEDs 323-330,
Turn off the corresponding ones of the ready LEDs 331 to 338 (S13
-11, S13-13).

If the printer is connected and the power is turned on, the pressing of the connect switches 315 to 322 is detected (S13-10), and if it is pressed, the corresponding one of the connect LEDs 323 to 330 is reversed to connect or disconnect. The switches are sequentially switched each time the switch is pressed (S13-12).

Next, if the printer is operating and the corresponding one of the active printer switches 311 to 314 corresponding to the reader of the image information transmission source is pressed, the corresponding connect LEDs 323 to 330 are blinked (S13-14, S13- 15, S13-16).

Then, if any error occurs in the printer, the corresponding ready LEDs 331 to 338 blink (S13-17, S13-1
9) If the printer is ready for printing, the ready LED is turned on (S13-18).

FIG. 17-1 (a) shows details of the error processing in FIG. 11 (error processing 1).

If an error occurs in the single mode, check if there is another printer that can operate and is not used by another reader, and if the cassette of the required paper size is set (S17-1, S17- 5, S17-8),
Printer switching processing (internal flag set, etc.) is performed (S17
-9) The operation start instruction is given to the new printer to be used (S17-10). If no printer is available when an error occurs in single mode, or if all printers in use are in error in multi mode, or if even one printer is in error in sort mode, the error content received from the printer To the error bit of each status (S17-8, S17-3, S17
-2, S17-4). Then, the ready signal is reset (S17-11) to notify the reader that printing cannot be continued.
Although not shown, the ready signal is connected between the reader, MIMOU, and the printer together with each signal line as a print enable / disable signal.

When the printer is switched to another usable printer in (S17-9), the copy operation can be performed, and therefore the error information of the printer used until then is not notified to the reader.
Further, since it seems that there are few errors, the reader is not notified that the output printer has been switched in this embodiment.
Since this operation is canceled at the same time as the printer stop output at the end of the copy operation, the error of the single printer is communicated and displayed on the reader in the normal communication in the single mode after that, and the error is displayed. Unless it is canceled, the next copy operation cannot be started by the program of the reader described above with reference to FIG.

On the other hand, in the multi-mode other than the sort mode, if all the printers in use are not in an error state, check whether a resend request is generated (S17-6). The resend request flag and the resend request number status are set (S17-7).

In multi mode, if an error occurs in one of the printers during copying using multiple printers, if the printer is not in sort mode, the remaining number of sheets and the number of resend requests are sorted by the remaining printers and copied. Is done. Specifically, the number of required printers is reduced by the number of error printers, and the number of readings by the reader is increased accordingly.

The error handling 2 in FIG. 17-1 (b) is the MI after the copy is completed.
This is a flow chart of sending error information to the reader when an error occurs in each printer used in the copy in the MOU. However, this figure is a flow chart in the multi-mode, and in the case of the single mode, error information of a specific printer is communicated and displayed until the error is released in the printer.

It is assumed that communication with the reader and communication with the printer are appropriately performed.

When the printer stop is received and the copy operation is completed (S17-12), the multi-input multi-output device checks all the printers used, and if it is in the sort mode, the error flag of each status is set. To do. On the other hand, if the printer is not in the sort mode, error information is not communicated unless all printers have an error. If an error occurs in all printers, the error flag of each status is set (S17-1).
3, S17-14, S17-15). Then, the information is transmitted for 5 seconds (S17-16), and the other unused printer can operate, or the error of the error printer is released and one of the connected printers can operate. If there is a printer available, the error flag of each status is reset and the ready signal which is a copy enable signal is set (S17-17, S17-18, S17-19).

FIG. 17-2 is a flow chart showing error processing in the reader. When an error occurs from the MIMOU or the printer, the ready signal is reset during copying, and the printer stop is output to the printer ( S17
-20, S17-21, S17-22).

Then, in the single mode, the single mode error flag is set (S17-23, S17-24), and if there is an error, an error display is performed (S17-25, S17-26). This single mode error flag is held until the error is released from the single mode printer (printer with the same number) (S17-27, S17-28, S17-30). Therefore, if the single mode error flag is set, the error of the single mode printer is always displayed even in the multi mode and copying (S17-27, S17-28, S17-29).

As explained above, if an error occurs during single mode copying, the error processing in MIMOU explained earlier will make it possible to copy in multi mode if there is another printer that can be used. Errors that occur in single-mode printers will continue to be displayed until they are cleared.

The error display in the reader operation unit for each copy mode and error occurrence pattern when three readers and three printers are connected via the MIMOU will be described below.

Fig. 19-1 shows that the printer of # 3 causes an error and stops the operation until the copy of the set number of sheets is completed in the multi mode in which the reader of # 1 transmits to the printers of # 1, # 2 and # 3. , The remaining two printers # 1 and # 2
The case of executing the copy for the set number will be described.

In this case, if the mode is not the sort mode, MIMOU does not cause an error in all the printers designated by the # 1 reader in the error processing 1 of FIG. 17-1 (a).
There is no reset of the ready signal to one reader, and no error flag is set. Therefore, the reader # 1 does not display any error during the execution of the copy or after the end of the copy in the error processing 3 shown in 17-2.

19-2 is similar to FIG. 19-1 from the # 1 reader to # 1,
# 2, # 3 In the multi mode for the printers, the case where all the printers make an error and stop the operation until the set number of sheets is completed is shown.

In this case, MIMOU sets an error flag and resets a ready signal because all printers designated by the # 1 reader have made an error in error processing 1 in FIG. 17-1 (a). Therefore, the # 1 reader transmits the printer stop command by the reader error processing 3 in FIG. 17-2.

After receiving the printer stop in the error processing 2 of FIG. 17-1 (b) (S17-11), MIMOU causes an error in all the used printers. Therefore, the error flag depends on the error content. To set. The reader # 1 displays an error according to the error flag in the error processing 3 of FIG. 17-2.

Since the MIMOU does not reset the error flag by the error processing 2 until any of the printers # 1, # 2, and # 3 becomes available, at least the reader # 1 also has at least 1.
The error display continues until the machine becomes usable.

FIG. 19-3 shows a case where an error occurs before the # 2 printer completes copying the set number of sheets in the multi mode in which the # 1 reader transmits to the # 2 printer. At this time, MIMOU resets the ready signal in error handling 1, reader # 1 sends a printer stop command by error handling 3, and MIMOU receives the printer stop in error handling 2 and then Since all the printers used (in this case, one printer # 2) have errors (S17-12), the error flags are set (S17).
-13). After 5 seconds (S17-14), since the printers # 1 and # 3 are available, the error flag is reset. Accordingly, after transmitting the printer stop, the reader # 1 displays an error corresponding to the error content for 5 seconds while the error flag is on.

Similar to the case of FIG. 19-3 described above, FIG. 19-4 shows the multi-mode from the # 1 reader to the # 2 printer, and an error occurs before the # 2 printer completes copying the set number of sheets. This shows a case where the remaining two printers # 1 and # 3 are in an error state at the time of the stop and are in a state where copying is impossible. In this case, an error is displayed on the reader until a printer that can be used appears as in the case of FIG. 19-2.

By performing the error display processing as described above, the normal error display section can also be used for multiple output mode, and it is possible to operate with the same feeling while distinguishing from the error display in the normal stand-alone or single mode. Becomes

Next, the display of the number of sheets on the reader operation unit in the multi mode will be described with reference to FIG.

(A) is a display example when 11 sheets are copied using three printers. First, before pressing the copy start key 253, the number "11" of presets which have been set by the ten keys 254 or called by any key of the preset keys 251 and registered in the mode is displayed (S18-
1).

After that, when the copy start key 253 is pressed, serial communication is performed with the MIMOU in the already described procedure (Fig. 17) to start copying. If all the printers and readers are normal and the stop key and the break key are not pressed, the total number of sheets fed by each of the three printers is 3 every time the optical system scans a document. By serial communication, the reader subtracts from the display number as compared to MIMOU, "8" (S18-2), "5" (S18-3),
"2" sheets (S18-4) are displayed in sequence.

When the remaining two printers are used, one of the three printers that was initially operating is no longer necessary, so MIMOU issues a printer stop instruction command to any one printer and disconnects it from the copy sequence. Then, when the reader performs the copy sequence and the next document scanning reversal position is reached, the remaining two units feed one sheet each, that is, a total of two sheets are fed.
From U, the display number "2" (S18-4) is subtracted from the number of fed sheets to display "0" (S18-5). Since there is no problem with the printer and there is no cause for interruption or interruption from the reader as well, it does not have the above-mentioned resend request flag, and the last paper feed flag is set when the paper feed status of 2 is received. Therefore, the copy sequence is recognized as a normal end, and once "0" is displayed, the number "11" set for the next copy is displayed (S18-6) to complete the copy.

Next, I started copying in multi-mode instead of sort mode with three printers, but one machine ran out of paper in the middle, and one machine caused a paper jam, and eventually two became uncopyable. The display of the number of sheets in this case will be described with reference to FIG.

First, the set number "11" is displayed (S18-7), all three printers feed, one copy is executed for each, and "8" is displayed (S18-8), one sheet is fed. By the way, when one printer runs out of paper, two printers can make a copy for the next document scanning, and two copies are made at one time. Therefore, subtract 2 from 8 and display "6" (S1
8-9), and after the next document scanning, subtract 2 from 6 to display "4" (S18-10). Here, if it is assumed that one of the two papers has a paper jam after the paper is fed for the next scanning of the original, “2” is displayed by subtracting 2 from 4 (S18-11).

However, there are 3 sheets of paper that are not normally ejected inside the printer that caused the paper jam, that is, they are not printed out normally while being fed, and there are 3 sheets of paper remaining inside the device. Is the resend request flag in the status. Further, the command for requesting the number of retransmitted sheets receives 3 sheets of the number of retransmitted sheets as information, and holds it until the final sheet feeding flag is reached.

Now, after displaying "2", the number of printers that can be copied becomes one, and after that, the printer must print out the set number of sheets. Therefore, each time the document is scanned, the number of displayed sheets is counted down by one, "1" (S18-12),
It becomes "0" (S18-13). Now, as already described with reference to FIG. 17, when the displayed number of sheets becomes "0", it is checked whether or not the final sheet feeding flag is set in the sheet feeding number status (S17-11).

In this case, one printer is causing a paper jam in the middle of the process, and the final paper feed flag is not turned on, so the number of resend requests is checked (S17-12). Since the number of resend requests is 3, "3" is displayed. (S17-13, S18-14)). After this, one copy-ready printer feeds and prints one sheet each time the document is scanned, so the display is "2" (S18-1
5), "1" (S18-16) and "0" (S18-17) are sequentially changed to print three sheets that were not executed before,
This completes the printout for the set number of sheets and returns to "11".
And the set number is displayed (S18-18).

In this embodiment, the image signal is output by reading the original, but it may be output from an image file using a storage device such as magnetic or optical, or as an image forming unit.
Besides the printer, the above-mentioned image file and various display devices can be used.

In addition, MIMOU can be connected to public lines to expand the network.

For safety reasons and to save energy, a shut-off function is added to turn off the power when the device is not used for a certain period of time.

That is, in the shut-off operation of the apparatus of the present embodiment, if any key is not pressed in the reader for 2 hours, the above-mentioned shut-off start command is generated from the reader, the reader turns off the display, etc., and the printer sends the shut-off command. If received, it turns off power supplies other than the power supply for the microcomputer.

In this system, multiple readers and multiple printers
Since they are connected via MIMOU, basically, the shutoff start command generated from the reader is output via MIMOU only to the printer with the same number. But MIM
When the number of readers and printers connected to the OU is different, especially when the number of printers is large, some printers do not have a corresponding reader, so the MIMOU outputs the shutdown off start command to those printers.

That is, when all the readers connected to the MIMOU are shut off, the MIMOU outputs a shutoff start command to the printer having no corresponding reader. As a result, all readers and printers are shut off. To cancel the shutter-off, when any key is pressed in the reader, the reader issues a shutter-off stop command and returns the display to the normal state. When the printer receives the shutoff command, it turns on all power and enters normal operation. Similarly to the start command, the command issued from the reader is also output to the printer of the same number through the MIMOU. Therefore, a printer without a corresponding reader is managed by MIMOU, and when a shutdown off-stop command is generated by any of the readers connected to MIMOU, MIMOU outputs a shutdown off-stop command to the printer without a corresponding reader. To do.

FIGS. 20-1, 20-2, and 20-3 show, in flow charts, the programs of the CPU at the shut-off operation in the unit. FIG. 20-1 shows the start and stop checks of the shut-off in the reader, and the check is performed in the key check routine.

If one of the keys has not been pressed for 2 hours and the shutter is not off (S20-1, S20-6, S20-7), perform a shut-off process such as turning off the display (S20-9), and shut off the MIMOU. The command is output (S20-9). On the other hand, if any key is pressed, each process corresponding to the key is performed (S20-2). If the shutter is off (S20-
3) Shut-off recovery processing such as display is performed (S20-4) M
A shutdown off-stop command is output to IMOU (S20-5).

Figure 20-2 shows the shutoff start command (a),
MI when the shutdown command (b) is received
Indicates the CPU processing of MOU. If a shutdown off start command is received, a shutdown off start command is output to that printer if there is a compatible printer (S20-1
0, S20-11), if all connected readers are shut off or check (S20-12), and if all readers are shut off, a shut off start command is output to the printer with no compatible reader (S20). -13, S20-14).

If a printer that supports the shutdown command is received, the shutdown command is output (S20-15, S20-16), and if a printer without a corresponding reader is shut off, the shutdown command is output. Output the top command (S20-17, S20-18, S20-19).

Fig. 20-3 shows the operation of the CPU of the printer when it receives the shutdown off start and shutdown off stop commands. When the shut-off start command (a) is received, shut-off processing such as turning off the power supplies other than the CPU and turning off the display is performed (S20-20, S20-2).
1, S20-22). When the shut-off stop command (b) is received, the power supplies other than the CPU are turned on and the warm-up process such as the temperature control of the fixing device is performed (S20-23, S20-
24, S20-25). Although the shut-off of the entire apparatus has been described in the present embodiment, a similar control method can be applied to a specific portion in the apparatus, such as a preheating function.

According to the present invention, when the shutoff start command is output from the data output unit, the shutoff start command is output to the corresponding image forming unit, and the shutoff start command is output from each of the plurality of output units. At that time, since the shutoff start command is output to the image forming unit that does not correspond to any of the output units, in such a case, the power consumption of the entire system can be reduced and the effective energy can be saved. The shut-off start command is not output to the image forming unit which does not correspond to the output unit, and some of the image forming apparatuses are immediately ready to operate, and the operability of the entire system can be improved.

[Brief description of drawings]

FIG. 1 is an external view of a system according to the present invention, FIGS. 2 (a) and 2 (b) are internal configuration diagrams of a reader, FIG. 3 is an internal configuration diagram of a multi-input multi-output device (MIMOU), and FIG. Internal structure of the synchronous memory board (SBD), Fig. 5 is an internal structure of the printer, Fig. 6 is a timing chart for image signals, Fig. 7 is an external view of the operation section of the reader, and Fig. 8 is MIMOU.
Fig. 9 is an external view of the operating section of Fig. 9, and Fig. 9 is a flow chart showing the procedure for selecting the timing signal of the reader when the power is turned on.
Fig. 10 is a flow chart of the execution program during the copying operation of the reader's microcomputer, Fig. 11 is a flow chart of the execution program during the copying operation of the microcomputer of the multi-input multi-output device, and Fig. 12 is the printer's micro The flow chart of the execution program during the copying operation of the computer, FIG. 13 is the flow chart of the execution program during the operation and display operation of the microcomputer of the multi-input multi-output device, and FIGS. 14 (a) and 14 (b) are The figure which shows the example of the display in the reader section special operation section, Figure 15 (a),
(B) and (c) are diagrams showing examples of paper cassette size and upper and lower cassette display, Fig. 16 is a serial communication flow chart diagram of the reader when the copy sequence is not being executed, Fig. 17-1 (a), (B), FIG. 17-2 is an error processing flow chart of the MIMOU and the reader, FIG. 18 is a diagram showing an example of displaying the number of sheets on the operation unit of the reader, and FIG. 19-1 to FIG.
Fig. 19-4 is a diagram showing an example of multi-mode connection, Fig. 20-1
FIG. 20 to FIG. 20-3 are control flow charts of the shut-off operation. 1,2 ...... Reader 3 …… MIMOU 4,5 …… Printer 12,13 …… CCD 32 …… Oscillation circuit 35 …… Selector 121,122,128 …… SBD 256 …… Liquid crystal display 257 …… Soft key 253 …… Copy Key 254 …… Numeric keypad 259 …… Upper / lower switching key 303 to 306 …… Multi-single LED 307 to 310 …… Copying LED 323 to 330 …… Connect LED 331 to 338 …… Ready LED

Claims (1)

[Claims] 1. A plurality of data output units, and a plurality of image forming units, which are larger in number than the data output units, for forming an image based on digital image signals output from the plurality of data output units. An image processing apparatus for a system, wherein a generating unit that generates data indicating an image forming unit selected to correspond to each of the plurality of output units of the plurality of image forming units; A means for outputting a shutoff start command to the corresponding image forming unit,
When the shut-off start command is output from the data output unit, the shut-off start command is output to the corresponding image forming unit in response to the data generated by the generating unit, and the shut-off start command is output from each of the plurality of output units. A control means for outputting a shut-off start command to an image forming section not corresponding to any of the output sections based on the data generated by the generating means when the off-start command is output. Image processing device.