JPS62118462A - Apparatus control equipment - Google Patents

Abstract

PURPOSE:To enhance accuracy of control by inputting clocks generated responding to the circuit of a main motor of an object to be controlled to slaves in common, event counting clocks even when the mode is changed, and thereby knowing the absolute quantity. CONSTITUTION:A master CPU2 and slaves CPU 3-5 count drum clock CLK1 by counters MDCN, SDCNT respectively, and count scan clock CLK2 by counters MSCNT, SSCNT. Based on counters MDCNT, MSCNT, a main controlling section 2 outputs control information in time division. On reference to SDCNT, SSCNT, slaves CP 3-5 make parallel operation following indication from the master CP2 and control each I/O.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an equipment control device, and more particularly to an equipment control device that includes a plurality of control sections and controls a plurality of input/output sections at high speed.

``Prior art'' Traditionally, this type of equipment has been made into a microcomputer in order to enhance its functions, and as the functions have increased, the number of objects to be controlled within the device has also increased, and it has become difficult to control these objects. High-speed response is now required. but,
When the number of controlled objects that require such high-speed response increases, time-sharing control using programs is not suitable.
This type of control has been handled by using a so-called multiprocessor system in which one microcomputer corresponds to one controlled object, or by adding a dedicated hardware circuit. Problems] The conventional example described above has disadvantages in that the circuit scale is large, the reliability is low, and the cost I is high.

The present invention has been made in view of the two-unit conventional example, and provides an equipment control device that can process a plurality of controlled objects with higher precision and at higher speed, and has a simplified hardware and software configuration. We aim to provide this on a 1-1 basis.

[L stage for solving the problem] As one stage for solving this problem, for example, the copying machine of the embodiment shown in FIG. 1 has a master CPU 2 as one control unit and a counter as 31 stages. MDCNT200. M.S.
CNT201 and slave CPU3 as a sub-control unit
5, and counters 5DCNT and 5S as counting means.
CNT and I10 group 6.

[Operation] In the configuration shown in FIG. 1, the master CPU 2 and slave CPUs 3 to 5 each have counters MDCNT, 5
The drum clock CLKI is used as a counter by DCNT, and the scan clock CLK2 is used as a counter by counters MSCNT and 5SCNT. The counter MDC
Based on NT and MSCNT, the main control unit outputs control information in a time-division manner. - On the other hand, slave CPUs 3 to 5 are 5DC
NT and 5SCNT, parallel operations are performed according to instructions from the master CPU 2, and each I10 is controlled.

"Embodiment" Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[Explanation of Circuit Block of Copying Machine 051 Diagram] 1 First, FIG. 1 is a block diagram showing the circuit configuration of a copying machine according to an embodiment.

In the figure, numeral 1 is an operation section consisting of various user keys and a display section, and numeral 2 is a master CPU that summarizes the entire operation.
Control programs, data, etc. are built into M2a. 3
~5 is a slave CPU that controls the load and has ROM
3a to 5a have the same built-in control program,
Controls common I10 group 6. This I10 group 6 can be controlled by the master CPU 2 and slave CPUs 3 to 5.

7 to 13 are load groups directly controlled by the master CPU 2, 7 is a main motor, 8 is an optical static eliminator, 9 is a charger, IO is an exposure lamp, 11 is a developing bias, 12 is a transfer device, and 13 is a fixing device. It's a heater.

14 is a scan motor for scanning the optical system, 15 and 16 are paper feed motors for driving the paper feed roller, 17 is a registration motor for driving the registration roller, 18 is a variable magnification motor for driving the zoom lens, and 19 is for front and rear ends and site erase. This is a blank exposure.

20 is a fixing thermistor for detecting the temperature of the rotary device, 21 is an H, P sensor for detecting the home position (H, P) of the optical system, and 22.23 is a paper feed sensor that detects the presence or absence of paper in the paper feed cassette. , two paper cassettes are provided here, corresponding to the number of paper feed cassettes. Reference numeral 4 denotes a magnification change H and P sensor for correcting the absolute position of the zoom lens, and 26 a registration sensor for detecting whether or not the paper is accurately fed from the paper feed section to the registration rollers. 35a is a toner replenishment sensor for detecting the amount of toner in the developing device, and 37a is a tJF in the cleaner section.
This is a toner sensor for detecting I=nana-,1.

CLKI is a drum clock obtained by rotating the photoconductor 1 - 2, and CLK 2 is a scan clock that is rotated in synchronization with the scanning of the optical system. 1/- is connected to slave CPU3 to slave CPU5.

[Description of Schematic Structure of Copying Machine (FIG. 2) J FIG. 2 is a schematic sectional view of the copying machine, and the same parts as in FIG. 1 are indicated by the same symbol.

The original is subjected to slit exposure by the exposure lamp of the No. 10 original illumination stage IJIL, and the JGf and magnification images are formed on the photosensitive drum 341- by the zoom lens 30. At this time, the original reflected light is reflected by the il mirror 27, the second mirror 28, the third mirror 29, and so on. Zoom lens 30. The light is guided to the photosensitive drum 34 via the fourth mirror 31, the fifth mirror 32, and the OT+6 mirror 33.

At this time, as the photosensitive tram 34 rotates in the direction of the arrow (A), the exposure lamp 10 and the first mirror 27 move in the direction of the arrow (B). This exposure lamp lO and the first mirror 27
The second mirror 28 and the third mirror 29 move in the same arrow direction (B) at half the moving speed. This is to keep the optical path length constant. After the exposure lamp 10 and the first mirror scan the length of the original, they start moving in the direction of the arrow (C) and stop when they reach the H and P sensors 21, or repeat these operations at one time during continuous copying. conduct.

By the operation 1-, an electrostatic latent image is formed on the photosensitive drum 34-]- charged by the charger 9, and the image is formed by the developing device 35. From the paper feed cassette 40 or the paper feed cassette 41, sheets of number 1- are fed one by one by the paper feed roller 38 or the paper feed roller B 39, and
The image is transferred by the transfer device 12 to the transfer paper which has been registered in the register I. Thereafter, the transfer paper transferred by the separator 36 is separated from the photosensitive drum 34, is conveyed by the conveyor 43, and after the toner transferred to the transfer paper is fixed by the fixing device 44, it is delivered 4Jl out of the machine.

[Copy machine timing theory IJI (Fig. 3) J Fig. 3 is a timing chart showing the control state Jl of the copy machine,
This is a one-time copy.

In the figure, various motors and blank exposure are depicted at a flat level, but in each case, these indicate timing and are different from the actual control state.

When the copy key on the operation unit 1 is pressed, output of 2 is started to the drum clock CLK1 and the scan clock CL, the scan motor 14 performs a reciprocating operation, and the H and P sensors return to the home position. When confirmed, scan lock CLK2 is stopped. Further, after the image has been transferred to the transfer paper, the output of the drum clock CLKI is stopped as the paper is discharged outside the machine.

[Explanation of operation of master CPU (FIG. 4) (FIGS. 8 to 10)] FIG. 4 is a flowchart of a control program stored in the ROM 2a of the master CPU 2.

It starts when the power switch is turned on, and first steps S
Initialize the RAM of master CPU2 and each PORT with l,
In step S2, the operating section 1 is controlled. This is done by checking the keys on the operation unit 1 and in conjunction with changing the mode, etc., which will be described later.

In addition, it also displays any abnormalities in the machine.

Step S3 is a step to control the temperature of the fuser 44 to an appropriate temperature, and according to the temperature information obtained from the fixing thermistor, the temperature is 170°C during wait and 190°C during copying.
Control I roll to °C. Step S4 is slave C
PU3, slave CPU4 and slave CPU5 controllers
・In this step, which performs a roll and is in wait mode, mote numbers 0 to 4 shown in FIG. 8 are sequentially assigned to slave CPU3 to slave CPU5, and the machine status is checked and the machine is controlled. It is.

The flow during this weight is shown in FIG. Although the numbers and mode numbers of the slave CPUs are shown as being limited in this figure, they are not limited to this. Further, in this embodiment, the mode is shifted from mode to mode when there is no abnormality, but this may also be done for each specific processing block, for example. It goes without saying that this further speeds up the response to abnormalities, and therefore, the transition from one mode to another is not particularly limited to this embodiment.

In step S5, it is determined whether or not to start copying, and if there are no problems with the conditions on the machine-1 or the operating section and the copy key is turned on, the process advances to the next step S6, and if the copy key is turned on. If not, or if there is a problem with the conditions, return to step S2. In step S6, the main motor 7, optical static eliminator 8, and charger 9, which are loads that do not undergo timing control, are turned on, and in step S7, the slave CP
It controls U3 to slave CPU5.

In this step during copying, mode numbers 0 to 9 shown in FIG. It is shown in Figure 10. In Figure 10 as well, the slave CPU number and mote number are written as if they are limited.
It is not limited to this.

Next, in step S8, the drum clock CLKI and scan clock CLK2 are counted, and these values are referred to in subsequent steps.

Here, for each input of each clock CLKI, CLK2, the drum clock counter MDC of the RAM of the master CPU2 is input.
NT and the scan clock counter MSCNT are incremented and cleared at a predetermined timing, and at the same time, the number of copies is also subtracted. As will be described later, this means that a part of the operation section, such as the number of copies and the copy stop key, is also managed.

In step S9, the fixing device 44 is controlled to an appropriate temperature, and 190
It is controlled at °C. Step SIO is a check of the scan clock CLK2, and when the value of MSCNT reaches TI, the process advances to step Sll and the exposure lamp IO is turned on.

In step S12, the scan clock CLK2 is similarly checked, and when the value of MSCNT is T2, the process proceeds to the next step S13 and the exposure lamp 10 is turned off. As a result, the exposure lamp 10 is turned on for (T2-Tl)X (scan clock cycle).

Similarly, in step S14, the drum clock CI- is checked for 1, and when the MD CN-r becomes T3, the process proceeds to step 315 and the development bias is set to 1.
Turn on. In step S16, the drum clock CL
When MDCNT indicating the KI count value reaches T4, the process advances to step S17 and the developing bias 11 is turned off.

Here, TI<T2<T3<T4.

Step S18 is to check whether the last sheet has been ejected by the tJ1 paper sensor 25, and if the last sheet has not been ejected, the process returns to step S7, as described below.
The above-mentioned operation f1 is repeated, and if the last paper is a waste paper, the process advances to step S19, and the drum clocks CI, K are
When 11 is checked and the count is T5 (T4 - T5), the process advances to the next step S20, and the charger and light remover are turned on.
The main motor is turned off to 1, and the process returns to step S2 to enter the wait state.

[Explanation of operation of slave CPU (Figures 5 (a) to (b), Figures 8 to 10)'' Part 5
Figures (b) to (i) show the RO of slave CPUs 3 to 5.
This is a main flowchart of the control program built into M3a to 5a, and since the contents of ROMs 3a to 5a are the same, the explanation will be based on the slave CPU 3 here.

First, as in the case of the master CPU 2, the process starts when the power switch (not shown) is turned on. First, in step S30, the RAM and FORT of the slave CPU 3 are initialized, and in steps S31 to S40, which mode is selected from among the modes shown in FIG. Check if is specified. If a mode is specified, a predetermined process is performed and after the process is finished, or if a mode is not specified, it is checked in step S41 whether or not copying is in progress, and if copying is not in progress, step S41 is performed. The process returns to S31, and if copying is in progress, the process proceeds to step S42.

In step S42, the drum clock CLKI is counted using 5DCNT, and the number of copies is checked so that it can be referenced during other processing. After completing this process, the process returns to step S31 and repeats the operations described in section 1-1. Next, the processing of each mode will be explained.

Step S when mode O is used to check toner supply.
43, and in step S43, the toner replenishment sensor 35a
is on, and if it is not on, it informs the master CPU 2 that it is normal and proceeds to step S41. If it is on, the process proceeds to step S44, and the ] Toner replenishment sensor 35a
Check whether or not it is on. If the predetermined number of times (or predetermined time) has not been reached, the process proceeds to step S41, and if the predetermined number of times (or predetermined time) has been reached, the master CPU 2 is notified of the abnormality (no toner) in step S45. As will be described later, slave CPUs 3 to 5
By sending data to the master CPU2 again, the master C
An interrupt occurs in the PU2, and the master CPU2 processes data from the slave CPUs 3 to 5 in an interrupt processing routine.

Step 346 if mode 1 is used to check for no paper.
Proceed to and check whether the paper feed a sensor 22 is on or not.
If it is not on, it is normal to master CPU2 (paper feed a side)
It is notified that this is the case, and the process proceeds to step S41. If it is on, the master CPU 2 is notified in step S47 that there is an abnormality (black paper on the paper feed a side), and the process proceeds to step 348, where it is checked whether the paper feed b sensor 23 is on or not.
Perform the same operation as 46.47.

Checking the discharged toner In mode 1' and 2, press ST'/
7' Proceed to S50 and check whether the JJI l/ner sensor 37a is on or not. If it is not on, the master CP
Notify U2 that it is normal and proceed to step S41. If it is on, the process advances to step S51, and it is checked whether the JJI toner sensor 37a has been turned on a predetermined number of times (or a predetermined time), and if it has not reached the predetermined number of times (or a predetermined time), the process advances to step S41. is a predetermined number of times (
Alternatively, if the predetermined time has elapsed, the master CPU 2 is notified of the abnormality (toner discharge abnormality) in step S52.

In addition, when in mode 3, which controls the variable magnification lens, Fig. 5 (b)
), the process advances to step S60, and it is checked whether the power has just been turned on. If it is immediately after the power is turned on, the process advances to step S61 to check whether the variable magnification home position sensor 24 is on. If it is not on, the CPU 2 is informed in step S62 that there is an abnormality (the variable power lens is not set), and in step S63 the variable power motor 18 is driven to move the variable power lens toward the home position, and then in step S41 Return to

・In step 361, the variable magnification home position sensor 2
4 is on, the process advances to step S64, where the variable magnification motor 18 is controlled to move to the initial setting position of the equal-magnification stirrup, and when the predetermined position is reached, the master CPU
to let them know that it is normal. These are absolute position correction processes necessary to confirm the absolute position after the power is turned on, since the variable magnification lens is driven by a stepping motor.

If it is not immediately after the power is turned on in step 360, step S6
Proceed to step 5 and check whether the magnification has been changed. If the magnification has not been changed, the process returns to step S41, but if there is a request to change the magnification, the process proceeds to step 366, where it is checked whether the position has been moved to the requested magnification. If it is moving, the master CPU 2 is notified that it is normal and the process proceeds to step S41, but if it is not moving, step S6
Proceed to 7 and error occurs in master CPU2 (variable magnification lens is moving)
, and the variable magnification motor 18 is driven to move the variable magnification lens to the determined magnification position in step 368.

In the case of mode 4 in which the home position of the scanner is checked, the process proceeds to step S6 to 9 in FIG. 5(C), and it is checked whether the optical system is detected by the home position sensor 21. If it is at the home position, the master CPU 2 is notified that it is normal and the process proceeds to step 341, but if it is not at the home position, the master CPU 2 is notified of an abnormality (optical system home position is out of position), and in step S71 the optical system is at the home position. The scan motor 14, which is a stepping motor, is driven to move toward the sensor 21 side.

Next, in the case of mode 5 in which the scanner is moved during copying, the process advances to step S80 in FIG. is notified to the master CPU 2, and the process proceeds to step S41. If there is no end flag EFLGI of
G) Check. Reversal flag I? F L
If there is no 3' G, go to step 382;
Check the number of pulses (number of stepping motor drive pulses) corresponding to the movement and separation of the optical system. Tokoroj! If the number of pulses has not been reached, that is, if the document has not moved a distance equal to the document size, the process advances to step S83, and the scan motor 14, which is a stepping motor, is driven forward.

On the other hand, if the optical system has not moved a distance equal to the document size in step S82, the process advances to step S84 and a reversal flag RF L G is set. Therefore, in the processing up to this point, the optical system has moved forward and the exposure process has been completed.

By setting the reversal flag RFLG in step S84, in the next process flow, it is determined that the reversal flag RFLG is on in step S381, so that the reversal flag RFLG is set in step S84.
The process advances to step 85 to enter a mode for updating the optical system.

In step S85, the home position sensor 21 is checked, and if the optical system has not reached the home position, the process proceeds to step 386, where the scan motor 14 is driven backward, and then the process proceeds to step 388. Further, if the optical system has reached the home position in step S85, step S8
Proceed to step 7 and reset the reversal flag RFLG. This indicates that the backward movement has been completed and, together with the above-mentioned operation, one step of the exposure process has been completed.

Next, in step 388, the count value of the number of copies and the drum clock CLKI are checked, and it is checked whether the exposure process is completely completed, and if it is not completed, [IJ
The process advances to step S41. If all processes have been completed, a completion signal is sent to the master CPU 2, an end flag EFLGI is set, and the process advances to step S41.

In mode 6, in which the paper feed a roller 38 is driven according to the paper feed a designation, the process advances to step S90 in FIG. 5(e), and the paper feed a sensor 22 is checked.

If the paper feed a sensor 22 is not on, step S92
If the Si'1 paper a sensor 22 is on, the process advances to step S91, sends an abnormal signal (burned paper on the paper feed a side) to the master CPU2, and sets the end flag EFLG2 to the cell i.
·do. In step S92, the end flag EFLG2 is checked. If the end flag EFLG2 is set, this is notified to the master CPU2 and step S
Proceed to step 41.

If the end flag EFLG2 is not set, the process advances to step S93, and the paper feed a motor 15 is given the number of pulses tl for the paper feed a roller 38 to move the transfer paper a sufficient distance to the registration roller. Check Taka.

If the number of pulses has reached tl, the process advances to step 398, but if the number of pulses has not reached tl, step S9
Proceed to step 4. In step S94, the number of pulses t2 sufficient to cause the paper feed roller 38 to move the transfer paper over a distance of 1 to the registration sensor 26 installed in front of the registration roller 42 is applied to the paper feed a. Check Taka. If the number of pulses has not reached t2, step S97
Step 398 proceeds to step 398 to drive the paper feed motor 15.
Proceed to. In step 398, count the number of copies ([
SDCNT that counts lff and drum clock CLKI
Check to see if paper feeding is complete. If the process has not been completed, the process advances to step S41, and if it has been completed, the completion is notified to the master CPU 2, and the end flag E F T is set.
After setting G2, the process advances to step S41.

On the other hand, if the number of pulses has reached t2 in step S94, the process advances to step 395 and the registration sensor 26 is checked. If the registration sensor 26 is not turned on, the process advances to step S96, where the master CPU 2 is informed that a jam has occurred in the paper feed section a, and an end flag EFLG2 is set.

Similarly, FIG. 5(f) shows an operation flowchart 1 in mode 7 in which the paper feed roller B 39 is driven according to the paper feed specification. Step 5100 to Step 310 in this diagram
The operations in step 8 are steps S90 to S in FIG. 5(e).
Since it is almost the same as 98, it will be omitted here.

When the mote 8 is driving the registration roller 42, the process advances to step 5110 in FIG. 5(g), and in step 5ilo, an end flag EFLG4, which will be described later, is checked.

If the end flag EFLG4 is set, step S41
Proceed to. If the end flag EFLG4 is not set, the process advances to step 5l11, and it is checked whether the number of drive pulses of the paper feed motor 15 or 16 has reached t5, that is, whether the transfer paper is being fed sufficiently. If the number of pulses has reached t5, the process advances to step 5112, and if the number of pulses has not reached t5, the process advances to step 5116.

In step 5112, the number of pulses (the number of drive pulses of the paper feed motor 15 or 16) t6 corresponds to a distance sufficient for the trailing edge of the transfer paper to leave the registration sensor 26 after the transfer paper is fed.
Check. If the number of pulses has reached t6, the process proceeds to step 3115, and if the number of pulses has reached t6, the process proceeds to step 5113. In step 3113, the registration sensor 26 is checked, and if the registration I sensor 26 is not on, the process advances to step 5115, but if the registration sensor 26 is on, step 511
Proceed to step 4. Abnormality in master CPU 2 (registration section jam)
is notified, the end flag EFLG4 is set, and the process advances to step S41.

In step 5115, the registration motor 17, which is a stepping motor, is driven, and in step 5116, the number of copies 11 and the drum clock CLKI are checked to check whether the registration conveyance is completed.
If it has not been completed, the process advances to step S41. If the process has been completed, a completion signal is sent to the master CPU 2, an end flag EFLG4 is set, and the process advances to step S41.

When in mode 9, which is the mode for driving the 192-dot blank LED, the process advances to step 5120 in FIG. 5(h), and EFLG5 of the end flag RAM 300, which will be described later, is checked. If the end flag EFLG5 is on, the process advances to step S41; if the end flag EFLG5 is not on, the process advances to step S5121.

In step 5121, the contents of 5DCNT that is counting the drum clock CLK1 are checked, and the count number (
A check is performed at t7 until the drum clock (drum clock) reaches the leading edge of the document. If the count is less than 17, the process advances to step 5124 because the leading edge of the document has not been reached. If the count number is t7 or more, the process advances to step 5122, and the count number (drum clock CLKI) is at the leading edge of the document (
The time t8 from t7 onward (1) to the trailing edge of the document (t8 before g4) is checked.

Count number is t8 or more 1. If so, the process advances to step 5123 to check the time t9 until the count number (to J1 clock CLK1) is cleared from the trailing edge of the document (t8 or more) to 5DCNT.

If the count number of 5DCNT is t9, step 512
The process advances to step 7, and if it is not t9, the process advances to step 5124. In step 5124, data Q'i for lighting all dots for blank exposure is provided. This is photoreceptor Dorat 1
．． The 111th position of the original in the electrostatic latent image is erased.

After this, the process returns to step 5127. Also step 51
If the count number is less than 18 at 22, step 5
Proceed to 125 and select either f4 or the size of the transfer paper (
Since blank exposure is time-division driving, it is temporarily coded). At step 5126, encoded data is prepared. In step 5127, the number of copies is counted (fi and drum clock CLKI are checked to see if the blank exposure has been completed. If not, the process advances to step S4.); if it has been completed, the process goes to the master CPU 2. After notifying completion and setting the Endo-frac EFLG5, the process advances to step S41.

Explanation of the mask CPU interrupt processing routine (Figure 6)
] FIG. 6 shows the interrupt processing routine of the master CPU 2, which is activated when the slave side returns to normal or when an abnormality occurs.

First, in step 5130, which slave has been selected is set in a predetermined register, and step 7'S13
1 sets which mode has been selected in a predetermined register. These data are displayed during control of the operation unit in step S2 of FIG. 4 to display the status of abnormality or normal recovery, and are also used to control the slave CPU and other mode selections in step S4 of FIG. 1, and is controlled in a rigid manner until normality is restored.

Next, in step 5132, check whether copying is in progress or not.
If copying is not in progress, the process advances to step 5138, and a return command is issued to end the mask interrupt processing routine. If copying is in progress, proceed to step 5133, and abnormality 1
Check whether n: is seriously abnormal or not. If the abnormality is serious, the process proceeds to step 5135; if the abnormality is minor, the process proceeds to step 5134; since the abnormality is minor, a last copy cycle is set to terminate each process currently being executed, and the process proceeds to step 3138 described above.

Further, in step 5135, the entire load is immediately reset since it is a serious abnormality, and in step 5136, the driver 1\clock counter MDCNT and scan clock counter MSCN are reset.
Stop counting T.

At step 5137, the drum clock counter MDCNT
The value of is set in T5, and the mask interrupt handling routine ends with a return instruction in step 5138.

[Explanation of slave CPU interrupt routine (Fig. 7)] Fig. 7 shows the interrupt processing routine on the slave side.
In order to use the group 6 in common, it is activated by a signal sent from the master CPU 2 to each of the slave CPUs 3 to 5 in a time-division manner as a basic clock on the slave side.

First, in step 5140, the output take is output to I10 group 6, and step S14. In step 1, the mode is checked, and if the mode is O-2, the process advances to step 5143, and a return command is issued to end the slave interrupt processing routine. Also, in step 5141, if mode 3 to mode 9 is selected, the process advances to the next step. Step Sl 4
．． 2, counts the number of interrupts, step 5143
The slave interrupt handling routine ends with the return instruction.

To explain in detail the content proposed in this embodiment, the clock generated in accordance with the rotation of the main motor, which is the controlled object, is commonly input to each slave, and even if the mode changes, the clock is counted as an event. Since it is possible to know the absolute quantity based on the operation, there is no need to select the operation in synchronization with the flow of the 9 ζ sequence when switching modes or switching the slave CPU, making it a very easy-to-operate configuration. There is.

As described above, according to this embodiment, highly accurate control is possible, high reliability is obtained, and high-speed parallel processing is possible.

[Effects of the Invention] As described above, according to the present invention, since the main control section and the sub-control section operate using a common clock signal, highly accurate control is possible.

[Brief explanation of drawings]

Figure 1(a) is a block diagram showing the circuit configuration, Figure 1(b)
) is a RAM configuration diagram of the slave CPU, Fig. 2 is a schematic cross-sectional view of the copying machine, Fig. 3 is a timing chart showing on/off of the load in a predetermined mode, Fig. 4 is a main flow chart showing the processing of the master CPU, 5(a) to 5(h) are main flowcharts showing the processing of the slave CPU, FIG. 6 is a flowchart of the interrupt processing routine of the master CPU, and FIG. 7 is a flowchart of the interrupt processing routine of the slave CPU. , FIG. 8 is a diagram showing the control mode, FIG. 9 is a diagram showing the mode transition of the slave CPU during wait, and FIG. 1θ is a diagram showing the mode transition of the slave CPU during copying. In the figure, 1... operation unit (key JT & nice play), 2
... Master CPU, 3 to 5 ... Slave CPU, 6
... I10 group, 7... Main motor, 8... Optical static eliminator, 9... Charger, lO... Exposure lamp, 11.
...Development bias, 12...Transfer device, 13...Fixing heater, 14...Scan motor, 15...Paper feed a
Motor, 16... Paper feed b motor, 17... Registration motor, 18... Variable magnification motor, 19... Blank exposure, 20... Front thermistor, 21... H, P sensor, 22... Paper feed a sensor, 23... Paper feed b sensor, 24... Variable magnification H, P sensor, 25... Paper discharge sensor, 26... Registration sensor, 34... Photosensitive drum ,
35...Developer, 35a...T-1--Complementary m sensor, 42...Registration roller, 43...Transport unit, 44
...It's a foot device.

Claims (2)

[Claims] (1) An equipment control device that includes a main control section, a plurality of sub-control sections, and a plurality of input/output sections, and performs control based on control information from the main control section, the main control section and the plurality of input/output sections. Each of the sub-control units includes a counting means for counting clock signals,
A device control device characterized in that a common clock signal is input to the main control section and the plurality of sub-control sections, and control is performed based on the count value of the counting means. (2) The device control device according to claim 1, wherein the main control section outputs control information to a plurality of sub-control sections in a time-sharing manner based on a clock signal.