JPH0414535B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a facsimile device in which two CPUs are used in a system control unit, and the functions of the system are controlled by each of the two CPUs. The present invention relates to a facsimile device that enables cost reduction by making it easy to change a control program so as to be fully compatible with the device.

Conventional technology A facsimile control method that uses two CPUs to configure a system control unit, thereby making it possible to obtain a low-cost facsimile machine without increasing the number of parts used or the mounting space. has already been proposed by the inventors of this invention (Japanese Unexamined Patent Publication No.
57-168573).

Problems to be Solved by the Invention The facsimile device of the present invention further embodies the previously proposed facsimile control method, and also allows two CPUs to control system functions, thereby improving control program control. It is an object of the present invention to provide a facsimile device that can be easily changed and can reduce costs.

Means for Solving the Problems The present invention includes a main power supply unit, a sub power supply unit, and a first power supply unit that is supplied with power from the main power supply unit during transmission or reception operation.
It is equipped with a CPU and a second CPU that is constantly supplied with power from the sub power supply section during operation, and during standby, the second CPU monitors the status of the entire system, and when the main power is turned on. When the cause is detected, the second CPU turns on the main power supply, and notifies the first CPU of the main power supply cause, and after turning on the main power supply, the second CPU turns on the main power supply.
The CPU is slaved to the first CPU, and the first CPU executes a predetermined operation in response to the cause notification, and after the predetermined operation is completed, the first CPU
In a facsimile device in which the second CPU shuts off the main power supply according to a CPU instruction and again monitors the status of the entire system, the first CPU has a function of sharing control related to transmission control, The second CPU is configured to have a function of sharing control related to mechanism control.

Operation To facilitate understanding, first, the previously proposed facsimile control method will be briefly explained.

Two main and sub power supply units and two CPUs each operated by these power supply units are used, and during standby, one of them, for example, the second CPU, that is, the slave CPU, has a relatively small capacity. Operates on secondary power supply to monitor system status. In this case,
The other, for example the first CPU, i.e. the master
The CPU is not activated.

When the slave CPU detects a predetermined cause for turning on the main power, it turns on the main power, and after turning on the main power, it is slaved to the master CPU and operates according to commands from the master CPU.

Then, when the desired operation is finished, the master
The CPU issues a command to shut off the main power, and the slave CPU performs the operation to shut off the main power.
After that, it will be released from the master CPU and will continue monitoring the system status again.

By the way, in the facsimile device of this invention,
When configuring a system control unit with two CPUs like this, one CPU
For example, the master CPU is assigned the control function of protocols and other transmission control systems and the function of generating commands, while the other CPU, such as a slave CPU, is assigned the control function of the mechanism control system and the function of monitoring the system status. In this way, the functions are divided and given to each CPU.

In this way, by using two CPUs and dividing their functions, programs can be changed individually, making it easy to add and change some functions required for various facsimile machines. can be dealt with, and cost reductions can also be achieved.

Moreover, similar to the previously proposed facsimile,
Not only can the system status be adequately monitored, but power consumption can also be reduced.

Example Next, regarding the facsimile device of the present invention,
One embodiment will be described with reference to the drawings.

1A and 1B are an example of a structural diagram of a facsimile device of the present invention, and FIG. 1A is a side view;
Figure B is a diagram of the internal structure seen from the front.

In the drawing, 1 is the operation unit, 2 is the automatic document feeder (ADF)/reading unit (scanner), 3 is the recording unit (plotter), 4 is the control power supply unit (controller), and 5
Reference numeral denotes a main operation panel equipped with operation switches and display lamps for transmitting and receiving, 6 a sub-operation panel equipped with operation switches and display lamps for operations other than transmitting and receiving, and 7 document guide plates that guide both sides of the document. 8 is a document insertion slot, and 9 is for transporting the lowest document in the stack of documents.
ADF feed roller, 10 is a separation rubber that separates the stacked originals into one sheet, 11 is a separation roller that separates only one sheet of the stacked originals and conveys it to the reading section, 12 is a center fan that attracts the lowest original of the stacked originals, 13 is the ADF motor that drives the ADF, 14 is the scanner feed roller that transports the document, 1
5 is a pressure plate that brings the original into close contact with the contact glass;
16 is a contact glass, 17 is a fluorescent lamp for irradiating the original, 18 is a mirror, and 19 is a drive motor for conveying the original, which is a scanner pulse motor.

Further, 20 is a lens that images the light from the original onto a CCD element, 21 is a sensor board provided with a reading-related electric circuit, 22 is a CCD reading element that converts the light from the original into an electrical signal, and 23 is the original A table, 24 is a reduction motor for moving the CCD element, etc. when reducing a document, 25 is a roll of electrostatic recording paper, 26 is a guide roller, and 27 is used when setting the recording paper. Manual feed roller with conveyor roller,
28 is a tension roller for buffering the recording paper, 29
30 is a recording feed roller that conveys the recording paper during recording with the stylus; 30 is a rear roller that brings the recording paper into close contact with the stylus; 31 is a single-sided stylus that applies a negative voltage to the recording paper in accordance with the image;
32 is a plotter/pulse motor for conveying the recording paper during recording, 33 is a cutter unit for cutting the recording paper, 34 is a developing feed roller for conveying the recording paper to the developing process, and 35 is a roller for feeding toner to the magnet roller. Doctor plate that determines the amount of adhesion, 3
6 is a magnet roller unit for adhering toner, 37 is a toner hopper, 38 is a gear roller for bringing the recording paper into close contact with the toner, and 39 is a reflection plate.

40 is a xenon lamp as a light source for fixing, 41 is a fixing protection glass that prevents contamination of the xenon lamp and the reflector, 42 is a conveyor belt that conveys the recording paper during fixing, and 43 is a conveyor belt that attracts the recording paper to the conveyor belt and also fixes the recording paper. 44 is a paper ejection switching roller that conveys the recording paper and acts as a paper ejection roller when the recording paper is not reversed; 45 is a reversal switching roller that is used when reversing the recording paper; 46 is a reversal switching roller for reversing the recording paper; 47 is a reversing conveyance roller that conveys the reversed recording paper; 48 is a paper discharge roller that discharges the received recording paper to the copy tray; 49
indicates the plotter motor that drives the plotter section.

50 is a fixing power source that causes the xenon lamp to emit light; 51 is a control power source that is the main power source of the device; 52
53 is a control circuit section in which a control circuit of the device is housed;
5 is the document tray where sent documents are stacked.
4 is a copy tray in which received recording paper is stacked;
55 to 63 are sensors, 55 is for detecting the presence or absence of a document in the ADF, 56 is a sensor for driving the scanner feed roller when a document is detected,
57 is a sensor for detecting that the document has been conveyed to the reading position, 58 is for detecting the presence or absence of recording paper, 59 is a sensor for detecting that the recording paper has been conveyed to the front of the developing unit, and 60 is a sensor for detecting that the recording paper has been conveyed to the front of the developing unit. A sensor for controlling the timing of reversing the recording paper, 61 a sensor for detecting that the recording paper has been ejected, 62 a sensor for detecting the remaining amount of roll paper, and 63 a sensor for detecting the presence or absence of toner.

FIG. 2 is a functional block diagram showing an example of the basic configuration of a facsimile device. In the drawing, 1
00 is a reading unit, 200 is a VPU (video processing unit), 300 is a TTI/RTI (transmitting terminal identification information generating unit/receiving terminal identification information generating unit),
400 is a WE (write drive unit), 500 is a main/sub scanning device, 600 is a DCR (data encoding/decoding unit),
700 is EDU (two-dimensional encoding/decoding unit), 800
900 is a mechanism control device; 1000 is a recording unit; 900 is a mechanism control device;
SCU (system control unit), 1
100 is G-CU (compatible unit for G machine), 1200 is CCU (communication control unit), 130
0 is the operation unit (OP-PORT), 1400 is the modem (modulator/demodulator), 1500 is the ADF (automatic document feeder), 1600 is the power supply unit, 1700 is the NCU (network control unit), 1801 is the original to be sent, 1802 is the The received copy 1803 indicates a telephone set, solid lines indicate a data signal system, and white lines indicate a control signal system.

The reading unit 100 is a unit that converts the calligraphic information of the original 1801 into an image signal, and is composed of an optical system and an illumination system, and outputs it to the next VPU 200 as a black and white image signal.

In the case of the stylus recording method, the main/sub scanning device 500 is composed of only a paper feeding mechanism.

The recording section 800 is a unit that converts an image signal into a visible image, and develops and fixes the image signal provided from the WE 400.

The TTI/RTI 300 is a unit that generates identification information on the transmitter side when transmitting and on the receiver side when receiving, such as the transmitter number, transmission time, and communication end time.

The DCR 600 is a unit that removes redundancy from drawing information, converts it into compressed data by one-dimensional encoding such as the MH method, and decodes the received compressed data.

The EDU 700 is also a unit that performs two-dimensional encoding and decoding.

CCU 1200 is a line control unit and executes facsimile control procedures in accordance with instructions from SCU 1000.

The modem 1400 converts coded binary image information into a signal suitable for line transmission, and also demodulates the received image information.

The NCU 1700 has a line interface function, and performs line maintenance, ring tone detection, and the like.

The G-CU 1100 has a G modem that complies with the CCITT standard, and modulates and demodulates ternary data.

The mechanism control device 900 is a control unit for the mechanism section, and controls the reading section 100 and the main/sub scanning device 50 according to instructions from the SCU 1000.
0, the mechanical section of the recording section 800 is driven.

The SCU 1000 is a unit that controls the system made up of these various parts, and controls the sequence of the facsimile machine.

The operation unit 1300 transmits the operator's switch operations to the SCU 1000, and also notifies the operator of the machine's operating mode and status.

FIG. 3 shows the facsimile machine of this invention.
FIG. 2 is a block diagram showing an example of the configuration of main parts of an SCU 1000 and a power supply unit 1600. Reference numerals in the drawing are the same as in FIG. 2, and 1001 is a slave CPU, 1002 is a master CPU, 1601 is a sub power supply section, 1602 is a main power supply section, and SW is a power switch.

In the case of FIG. 3, when the power switch SW is turned on, only the sub power supply unit 1601 is turned on, and the slave CPU 1001 is placed in an operating state and in a standby state.

The slave CPU 1001 monitors the status of the system by monitoring the presence or absence of a document in the reading device, the presence or absence of recording paper in the developing unit, the on-state of the start switch, etc., and monitors the status of the system by monitoring the presence or absence of a document in the reading device, the presence or absence of recording paper in the developing unit, and the ON state of the start switch. When the cause of turning on the main power supply unit 1602 is detected, the main power supply unit 1602 is turned on. After the main power is turned on, the master CPU 1002 controls the transmission control system, and also controls the slave
A CPU 1001 controls the mechanism control system.

The role of the slave CPU 1001 is as follows.

The first is document feed control of the scanner during transmission, which includes (1) driving, stopping, and specifying the speed of the pulse motor, (2) monitoring document jams, and (3) measuring the longest document.

The second is paper feed control of the plotter during reception, which includes (1) driving and stopping the pulse motor;
(2) Measurement and monitoring of paper loop amount, (3) Control of various clutches, (4) Paper jam monitoring, (5) Reverse operation control, (6) Monitoring of paper remaining amount, ( 7) Flash lamp lighting control, (8) flash lamp failure monitoring, etc. are performed.

The third is control of the scanner and plotter in copy mode.

Fourth, the operation port lamp lighting control is performed.

Fifth, the lighting control operation for checking the fluorescent lamp is performed.

In this way, in the facsimile apparatus of the present invention, the slave CPU 1001 shares control of the mechanism control system, and the master CPU 1002
is responsible for controlling protocols and other transmission control systems, and for issuing commands to the slave CPU 1001.

Therefore, programs can be changed individually, and function changes can be easily handled.

FIGS. 4A and 4B are block diagrams showing one embodiment of the facsimile apparatus of the present invention. The reference numbers in the drawings are the same as in FIGS. 2 and 3, and 1
01 is a pulse motor, 102 is a reduction motor, 1
03 is a photoelectric conversion element such as a CCD, 104 is a sensor, 201 is a peak detection section, 202 is a sampling section, 203 is a binary converter, 204 is a CCD drive clock generator, 205 is a D/A converter, 206
is ROM, 207 is address counter, 301 is
CPU (Central Processing Unit),
302 is a video memory, 303 is a crystal clock, 30
4 is a display memory, 305 is a serial interface circuit, 306 is a journal printer, 30
7 is a fluorescent display, 401 is an S-P converter, 402
403 is a level converter, 403 is a stylus high voltage switching circuit, 404 is a write timing control circuit, 405 is a segment selection circuit, 406 is a level converter, 407 is a segment high voltage switching circuit, 601 is a line buffer control section, 602 is a line buffer, 603 is a Input data switching section, 6
04 is a color discrimination RL counter, 605 is a switching unit,
606 is a message buffer, 607 is a 1-chip μ-CPU, 608 is a command decoder, 701
is μ-CPU, 702 is RL generation section, 703 is mode detection section, 704 is message buffer, 801
802 is a high voltage power supply, 802 is a stylus/segment electrode, 803 is a fixing section, 804 is a developing section, 805 is a cutter, 806 is a pulse motor, 807 is a recording paper, 901 is a step speed control circuit, 902 is a switching circuit, 903 is a step Speed control circuit, 904 is a switching circuit, 1003 is a
ROM, 1004 is a hydraulic interface circuit, 1005 is an address latch circuit, 1
006 is a ROM, 1007 is an address latch circuit, 1008 is a handshake controller, 1
009 is a clock generator, 1010 and 1011 are I/O ports, 1101 is an I/O port, 110
2 is a data control unit, 1103 is a data memory, 1
104 is an I/O port, 1105 is a tonal signal generation section, 1106 is a modulation section, 1107 is a signal selection circuit, 1108 is a synchronization signal generation section, 1109 is a demodulation section, 1110 is a data sampling section, 111
1 is a tonal signal detection unit, 1301 is an operation unit (operation port), 1302 is a control unit, 1303 is a display unit, 1304 is an operation unit, 1305 is a control unit, 13
06 is the display unit, 1401 is the M48 type modem, 140
2 is a V96P modem, 1403 is a data selector,
1404 and 1405 are LPF, 1406 is attenuator, 1407 is V21 type modem, 1408 is
LPF, 1409 is HYB, 1410 is carrier detector, 1411 is limiter, 1412 is BPF,
1413 is HPF, 1414 is 462Hz detector, 14
15 is Limituta, 1416 is BPF, 1417~
1420 is an amplifier, 1501 is a document separation fan motor, 1502 is a document conveyance motor, 1503 is a sensor, 1603 is a zero cross AC switch, 1
701 is an off-hook detection relay, 1702 is a rectifier, 1703 is a ring detection relay, 1704 is a DC circuit closing relay, 1900 is a DSB, 1901
-1903 are comparators, 2001 is a speaker, 2002 is a reception counter, 2003 is a transmission counter, and P1 to P6 and Q1 and Q2 respectively indicate connection points with corresponding code positions.

The dashed-dotted line A-A shown in FIG. 4 A and B
Since the circuit is complicated, it has been separated for convenience because it is necessary to enlarge the diagram, and in reality, each connection point with the corresponding symbol in both diagrams is connected to each other to form one circuit. are doing.

5A and 5B are flowcharts for explaining the operation of the facsimile apparatus of the present invention shown in FIGS. 4A and 4B. In the drawing, ~ is
Indicates stepping to the corresponding code position.

When the power switch SW shown in FIG. 3 is turned on, the slave CPU 1001 turns on the main power supply unit 1602, as shown in the upper part of FIG. 5A, and operates the master CPU 1002.
Then, after initializing the ADF and plotter according to a command from the master CPU 1002, the main power is temporarily shut off.

When such operation is finished, the slave CPU
The CPU 1001 is released from the master CPU 1002 and starts monitoring the system status.

First, the flow shown at the upper left corner of FIG. 5A is entered, and it is checked whether or not a document is set. If the original has been set, check whether it has been set or not.
Check whether the flag is set, whether the original reset lamp is on, etc.

If these are set or the set lamp is on, the copy flow in the third column from the left moves to the first step.

If the Copy button is on, proceed to the steps below it and press the original reset lamp.
Setting the set completion flag, checking whether there is a document in the ADF,
etc. will be judged.

If the copy button is not on, the process advances to the first step of the transmission flow in the fourth column from the left.
That is, it is determined whether it is off-hook or not, and if it is off-hook, it is determined whether the start button is on, whether the document setting completion flag is set, etc.

If it is not off-hook, the process moves to the first step of the reception flow in the fifth column from the left, and it is determined whether or not a ringing tone has been detected. If a ring tone is detected, a determination is made as to whether the polling lamp is on. If the polling lamp is on, polling transmission will be performed and the main power will be turned on.

If no ringing tone is detected, the process proceeds further to the first step in the sixth column from the left on the right, that is, the first column from the right. Then, it is determined whether the polling button is turned on, and whether it is turned on, whether the document set completion flag is set, etc. are sequentially determined.

If the polling button is not turned on, the process returns to the upper left step again, and it is determined whether the document is set, whether the set completion flag is set, etc.

Among the flows shown in FIGS. 5A and 5B, the slave CPU 1001 is responsible for determining the steps up to turning on the main electrode.

After turning on the main power, the slave CPU100
1 is slaved to the master CPU 1002 and shares control of the mechanism control system according to its commands. In addition, the master CPU 1002 gives commands to the slave CPU 1001, and
Responsible for controlling the transmission control system.

6A to 6C are transmission flow charts showing detailed operations of the transmission flow shown in FIGS. 5A and 5B.

FIGS. 7A to 7C are reception flowcharts showing detailed operations of the reception flow similarly shown in FIGS. 5A and 5B.

In these Figures 6 A to C and 7 A to C, A0 to A11, B0 to B6, and B10 to
B11 indicates stepping to the corresponding code position.

When the main power is turned off, the NCUOH relay is deactivated and the line connection is switched from the fax machine to the main phone.

The following Figure 8 A and B are SCU100 of Figure 4 A.
FIG. 2 is a block diagram showing the detailed configuration of 0. The reference numerals in the drawings are the same as those in FIG. 4, and when the circuits in FIGS. 8A and 8B are composed of a plurality of elements, an alphanumeric numeral is added after the circuits to correspond to each other.

The dashed-dotted line B-B shown in FIG. 8 A and B
As in the case of FIGS. 4A and 4B, the circuits are divided for convenience because the circuits are enlarged and displayed, and in reality, the diagrams constitute one circuit.

In the above embodiment, the slave CPU is responsible for monitoring the system status and controlling the mechanism control system, and after the main power is turned on to the master CPU, it is slaved to the master CPU and controls the mechanism control system according to its commands. and also master
We have explained the case where the CPU is responsible for issuing commands to the slave CPU and controlling the transmission control system.

However, the facsimile device of the present invention does not necessarily require the slave CPU to be in charge of monitoring the system status, nor does it need to be slaved to the master CPU and operate according to its commands.

In short, the system control unit was configured with two CPUs, one CPU was responsible for controlling the transmission control system, and the other CPU was responsible for controlling the mechanism control system and monitoring the system status. It is characterized by points. Therefore, the invention is not limited to the above embodiments.

As explained in detail above, in the facsimile apparatus of the present invention, two CPUs are used in the system control unit, and the control functions are shared between each CPU.

Effects of the Invention According to the facsimile apparatus of the present invention, changes in the control program can be sufficiently coped with by simply replacing one of the CPUs.

Therefore, the system control unit of various facsimile devices can be configured with a common CPU, and costs can also be reduced.

In addition, the system status can be sufficiently monitored and power consumption can be reduced. Many excellent effects can be obtained.

[Brief explanation of drawings]

FIG. 1A is a side view showing the structure of the facsimile device of the present invention, FIG. 1B is an internal structure diagram similarly seen from the front, FIG. FIG. 3 is a block diagram showing an embodiment of the main configuration of the SCU and power supply section in a facsimile device of the present invention, FIG. 4 A and B are block diagrams showing an embodiment of the facsimile device of the present invention, and FIG. A and B are Figure 4 A and B
6A to 6C are transmission flowcharts for explaining detailed operations in the transmission flow shown in FIGS. 5A and 5B. , FIGS. 7A to 7C are reception flowcharts for explaining detailed operations in the reception flow shown in FIGS. 5A and B, and FIGS. 8A and B are similar to that of FIG.
FIG. 3 is a block diagram showing the detailed configuration of the SCU. In the drawing, 1000 is SCU, 1001 is slave CPU, 1002 is master CPU, 16
00 indicates a power supply section, 1601 indicates a sub-power supply section, and 1602 indicates a main power supply section.

Claims (1)

[Claims] 1. A main power supply section, a sub power supply section, and a first power supply section to which power is supplied from the main power supply section during transmission or reception operation.
CPU, and a second CPU that is constantly supplied with power from the sub-power supply unit during operation, and during standby, the second CPU monitors the status of the entire system, and when the main power is turned on. When the second CPU detects the cause, the second CPU turns on the main power supply unit, and notifies the first CPU of the main power supply cause, and after turning on the main power supply unit, the second CPU
The CPU is enslaved to the first CPU, and the first CPU executes a predetermined operation in response to the cause notification, and after the predetermined operation is completed, the first CPU
In a facsimile device in which the second CPU shuts off the main power supply according to a CPU instruction and again monitors the status of the entire system, the first CPU has a function of sharing control related to transmission control, The facsimile apparatus is characterized in that the second CPU has a function of sharing control related to mechanism control.