JPS6235905A - Controller for apparatus - Google Patents

Abstract

PURPOSE:To unify centralized management and control of control information by performing the centralized control of plural analog operation components to substitute a control circuit in each analog operation component with one hardware. CONSTITUTION:A RAM where data corresponding to analog IN channels of the drum rotative speed, the temperature of a fixing roll, etc. are stored is provided in the interface of an analog input port 32 in a controller 30 of a copying machine to discriminate the magnitude of a preliminary set reference value independently of processors 36 and 37. If this reference gets out of a certain range as the discrimination result, an internal interruption occurs in the processor 37. The processor 37 checks input data and an interruption channel for this interruption and gives a specific micro instruction to the macro code processor 36. A controlled variable which keeps a variable to be controlled at a target value is operated at a highs speed, and the result is outputted to, for example, a PWM output port.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for equipment, and more particularly to a control device for equipment that performs centralized control of analog operating components through digital processing by a high-speed microcode processor.

[Prior Art] In recent years, the progress of electronics in all industrial fields including OA, FA, and LA has been remarkable. It can be said that this is the result of skillful fusion of electronics and mechanism. Needless to say, the basis for this will largely depend on the remarkable progress in semiconductor integration technology and the synergistic effect of □computer technology. This is because it is advantageous to convert systems into LSIs in order to disseminate products in large quantities at low cost. However, there are still many gaps in the mechanism, particularly in the interface between the analog operating components and the digital control electronics. In other words, at present, most digital control electronics only perform so-called ON10FF control for analog operating components, so analog operating components still have their own complex control systems, and at this contact point, It cannot be said that the functions of digital control electronics are fully utilized. Therefore, it is considered that the user is bearing unnecessary costs for this contact portion.

Currently, such digital control electronics are microcomputers or microcontrollers (memory,
In many cases, it is based on a 1-chip microcomputer (including Ilo). Conventionally, for the purpose of controlling such analog operating components, an A/D converter was integrated into a single-chip CPU.
There is something on-chip inside. In addition, conventional controllers include a CPU, memory, counter/timer,
Some models have been announced that include a built-in /D controller, PWM output, and a display screen/screen interface (for example, an LCD interface driver). However, these are merely convenient combinations of conventional configurations (LS
However, due to issues of processing speed and control complexity, in reality many operational components still include their own dedicated control sections. It is not possible to effectively eliminate the waste present at the interface between the operating components and the digital control electronics. Therefore, it can be said that devices including analog operating components are becoming more expensive.

Now, a device having such a problem will be explained in detail below, taking a copying machine as an example. Here, FIGS. 9 to 14 relate to an explanation of a conventional example, and FIG. 9 is a sectional view showing the configuration of a conventional relatively small-sized copying machine.

Such devices also generally involve complex control as described below. In the figure, the user first sets the original to be copied on the original table l. Next, the number of copies and copy density are set, and in this case, a key switch is used to select whether to automatically detect the density pattern and set the appropriate density, or to set it manually according to preference. The machine is ready for copying (for example, the temperature of the heater at the front of the foot is at the required foot temperature, each mechanical part is positioned at the desired home position, and supplies necessary for copying, such as paper and toner, are prepared. state), the operator turns on the copy start key. Then, the halogen lamp 2 (evening lamp) lights up, and at the same time the charged corona 3
The energy is lost, corona discharge starts, and a surface potential is generated on the surface of the photoreceptor tram 4. Next, the document table l moves and the formation of an image onto the photoreceptor 4 starts. In this case, the original image is formed on the photoreceptor 4 through the short focus lens 5 (fiber lens). The image formed on the photoreceptor 4 (at this time, it is called a latent image and is not visible to the naked eye) is then illuminated by an erase lamp 6 onto unnecessary areas to eliminate the charge. This is photoreceptor 4
This is done for the purpose of uniformly exhausting the image, and for the purpose of editing, such as deleting a part of the image. Therefore, as the erase lamp 6, an LED array or an EL upper segment liquid crystal shutter array, etc., which is configured so that the light emitting length changes in the longitudinal direction, is used. The remaining erased latent image is visualized by applying toner in a developing device 7. That is, toner adheres to the area where the potential is applied and an image is formed.

On the other hand, the paper 10 fed from the paper feed cassette 8 at a predetermined timing is stopped and waiting at the registration roller 9. At this time, the registration roller 9 is moved to the drum 41-
The sheet of paper 10 is fed so that the leading edge of the image visualized in the image coincides with the leading edge of the sheet of paper 10.

The image of tram 41- is then transferred to paper 10. At this time, the transfer corona 11 is applied from the back side of the paper 10 so that the i-ner is well placed on the paper 10. If the charging corona 3 is approximately 5.8 KV, the transfer corona 11 is energized at a slightly higher potential. Next, the paper discharge lamp 12 is turned on to eliminate static electricity on the paper 10 so that the paper 10 can be easily peeled off from the surface of the drum 4. The paper 10 on which the image has been transferred is conveyed by a conveyor belt 13. At this time, negative pressure is applied from the back surface of the conveyor belt 13 by the vacuum motor 14, and the paper 10 is brought into close contact with the conveyor belt 13. Next, the paper lO is transported to the fixing section 15, where heat and pressure are applied by a heater. As a result, the image is fused to the paper 10 and conveyed to the paper discharge stocker 16.

On the other hand, the photoreceptor 4 involved in the transfer is cleaned by collecting residual toner in a cleaning section 17. Next, the residual potential of the photoreceptor 4 is removed by irradiation with a static elimination lamp 18, and a surface potential is generated by receiving a new discharge from the charged corona 3. In this way, the copying machine repeats the operation for the set number of copies.

Further, in this copying apparatus, a small short focus lens 19 (light guide) is placed next to the short focus lens 5, and an image sensor 20 (photodiode array) is used to detect the original. This is for editing the manuscript and automatically recognizing the density of the manuscript. Editing of the original is performed, for example, by removing unnecessary portions of the image read by the image sensor 20 using the erase lamp 6 described above. In addition, in order to reduce the cost, this copying machine uses one AC printer 21.
By using a clutch and solenoid (not shown),
The tram 4, conveyance belt 13, paper feed roller 22, registration roller 9, and paper discharge roller 23 are rotated, and the document table 1 is moved.

FIG. 10 is a control circuit diagram of the copying apparatus described above. In the figure, Ux is an l-chip microcontroller, U2 and U3 are Ul's I10 expansion unit. The main work of the controller U1 is to control the feeding, conveyance, and fixing of the copy paper 10, to rotate the motor 21, to control the energization/deenergization of the lamp regulator, high-voltage power supply, clutch, solenoid, etc., and also to control the energization/deenergization of the lamp regulator, high-voltage power supply, clutch, solenoid, etc. (not shown). , key scan control for operation/display, and LCD control for the display. The controller U1 also includes a sensor (FD) for detecting the document size by detecting the document density pattern, a sensor (FD) for AE (automatic exposure), a surface potential sensor (SE) for the photoreceptor 4, a temperature control sensor (NTC), and a signal with a high noise level. An A/D converter with one channel as input, for a total of four channels, is used. In many cases, such a controller uses a one-chip microprocessor built into the A/D converter. Timing control of the copying apparatus advances the timing by counting encoder pulses generated by the rotation of the drum drive motor 21, so the drum clock pulses are input to the event counter at the terminal Tu. Further, an AC input zero cross detection Hals is input to the terminal To, and is used as a count pulse for a timer and for a zero cross trigger of the AC power supply in temperature and exposure lamp control. In addition, the I10 expansion chip U2 connected to the input cabinet of the controller U1. Various sensors, solenoids for controlling mechanical parts, clutch dryers, etc. are connected to U3 to energize/deenergize them. With this configuration, the controller U1 completes one cycle of the copying process by feeding paper, charging, exposing, developing, transferring, transporting, fixing, discharging, and cleaning the photoreceptor 4. In addition, controller U
1 detects and processes abnormal conditions. In other words, serious abnormalities include an abnormal rise in the fixing temperature, abnormal lighting of the exposure lamp, and paper jams that are detected and the copying process is immediately interrupted. Detects opening of a lid, etc. and notifies the operator. 1. Normally, the copy operation starts after determining the presence or absence of an abnormality before starting the copy operation.

Now, such reproduction devices include several important analog operating components. For example, a lumbricator that controls stable light emission from the halogen lamp 2, a high-voltage generator that generates a surface potential by generating corona discharge on the photoreceptor 4, and a low-voltage power supply (24VDC) that drives the mechanism.
etc. However, so-called analog operating components such as conventional halogen lamp units and various power supplies are each independent units, and the controller U1 simply issues an ON10 FF command to these analog operating components.

FIG. 11 is a block diagram showing connections between controller Ul (and U2, U3) and various analog operating components. The lamp regulator 25 is a device that prevents the halogen lamp 2, which is the light source, from flickering due to power fluctuations. For example, when the commercial source is AClooV, the AC
It is designed to operate at 30V. External voltage is AC
This is to ensure that even if the voltage varies between 30 and 120V, the voltage applied across the lamp is always 80V.

Fig. 12(a) is a diagram showing the operating principle of compensating for AC input voltage fluctuation with the trigger control angle O, and Fig. 12(b)
is a block diagram of a lamp regulator to which this principle is applied. Here, by controlling the lighting phase of the halogen lamp 2 using a triac, its effective value is kept constant regardless of fluctuations in the AC voltage applied to both ends of the lamp. That is, the pulse transformer T is activated by the trigger element.
At the same time, the phase of the triac TR is controlled as shown in (a) of the same figure, and at the same time, the AC input rectified by the bridge circuit BR using a switching element consisting of a photocoupler or thyristor is connected to the a of the pulse transformer T. ,
A switch is made using the b terminal output to generate a waveform similar to the voltage waveform applied to the halogen lamp 2. This is input to a pseudo-effective value generation circuit composed of a CR integration circuit to generate a pseudo-effective value, and the difference is calculated. Input to dynamic amplifier AMP. The differential amplifier AMP compares the pseudo-effective value with a predetermined reference value, adds a trapezoidal wave generated starting from the zero-cross pulse of the AC input to its output, and converts that value into a phase control amount using a trigger element. TRIAC TR is triggered. Here, the work performed by the controller U1 is only to ON10FF control the jump regulator 25 via the trigger element.

FIG. 13 is a block diagram showing the high pressure generator.

Here, DC24V is used as human power, and PWM (Pa)
DC24V power is switched using the Li (SumiI modulation) signal, high voltage is generated via a high frequency transformer, and rectification is performed on the secondary side of the high voltage. Each high-voltage output causes corona discharge via the charging corona 3 and the transfer corona 11, so in order to keep the discharge current constant (constant current power supply), the current at the housing ground is fed back to the PWM generation circuit. The switching speed of the power switching element is approximately 32K)12, and the secondary side of the high frequency transformer is divided into two for a common primary side, and approximately 6KV is applied to the charging corona 3, and approximately 6.2KV is applied to the transfer corona 11. Occur. Furthermore, protection against abnormal voltage generation, load short circuit, and overcurrent is directly handled by the protection circuit within the high voltage generator.

Here, the work performed by the controller U1 is to turn the high voltage generator 26 ON10F via the power switching element.
It only performs F control.

FIG. 14 is a block diagram of a switching regulator which is a low voltage DC power supply circuit. This method controls the output of the chopper based on the time ratio, and AClooV
The rectified and smoothed input is chopped, stepped down to a desired voltage by the primary and secondary turns ratio of a high frequency transformer, and then rectified and smoothed again to obtain a stable 24V DC output. The principle of output stabilization is pulse width modulation, and the transformer can be made smaller by increasing the chopper frequency.

This power supply operates independently of at least the control of controller U1. Output is obtained immediately when the power is turned on. However, if these power supplies are turned on before the controller U1 starts operating, problems may arise (for example, if the controller U1
If 1 is not initialized, all of the I10 port lines will become high impedance and the load will be energized), so the power etc. may be cut off with a relay contact. However, if the DC 24V line only supplies power to mechanical unit solenoids, etc., control by the controller U is expected from the viewpoint of power saving. However, even in that case, the work performed by the conventional controller Ul is to turn on the switching regulator 28 via the chopper circuit.
It only performs F control.

In the following, regarding the conventional example, the role played by the controller Ul mainly with respect to analog operating components has been described. All of these analog operating components are placed in a position to operate independently, and controller U1 simply issues 0N10FF control signals to them.

Detection of abnormal conditions, if necessary, is provided by the controller U1 by circuitry built in these analog operating components.
A HIGH or LOW level signal is output to the input ports of the controller U1, and the controller U1 senses these input ports to determine an error.

Thus, a disadvantage of prior art devices arises from relying on the internal controls of the component itself for all control of such analog operating components. That is, since the controller U1 is not closely related to the control, the detection of an abnormal response is delayed, and furthermore, all control of the component relies on the internal control of the component itself, which requires an extra number of parts. etc. In recent years, there has been a demand for all types of equipment to be smaller and lighter, but in order to meet these demands, even analog operating components can no longer exist as completely independent entities. However, conventional controllers that are closely related to the control of such analog operating components are all general-purpose microprocessors for digital processing purposes, and in order to meet such requirements, conventional controllers are used for control. Once a system is assembled, it uses a dedicated microcontroller and high-speed A/
A dedicated disk lead C is required for the D controller 8, resulting in a system several times more expensive than the independent analog operating components described above.

[Objective] The object of the present invention is to eliminate as much waste as possible, especially at the interface between analog operating components and digital control electronics, and to make the control by digital control electronics closer and more rational. The object of the present invention is to provide a control device for equipment that further strengthens the integration and fusion of analog operating components and digital control.

Another object of the present invention is to place as much control of equipment as possible under rational and flexible digital control, to centralize control and control information, and to unify control methods. The object of the present invention is to provide a device control device that can simplify the operation of each operating component.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings. 1 to 8 relate to an explanation of an embodiment of the present invention, and FIG. 1 is a block diagram of a control device 30 of a copying machine according to the embodiment. In the figure, 3.1 is a digital signal input port, and 32 is an analog signal input port, which includes a scanner that scans eight analog human channels ADO to AD7 at high speed, an A/D converter, and an interface. 33 is an output port for digital signals, 34 is an output port for pulse width modulation signals FWMO, PWMI, . . .
35 is a ROM that stores the main control program of the embodiment shown in FIGS. 2 and 8, and an RA that stores information necessary for control.
36 is a macro code processor that executes microinstructions equivalent to several hundred bytes in 1 to 2 μsec, and 37 is a processing unit that is 3 to 4 times faster than a normal general-purpose microprocessor. 38 is an I10 controller having a control function for controlling the mechanisms of the copying machine; 39 is a communication device (for example, G-LAN) that performs data communication with the outside.

The main processor 37 has external interrupt channels INTO, l.
There is NTl... The main processor is about several hundred N5E
c/ instructions. Furthermore, it has a register puncture consisting of a plurality of registers, and can access the input/output I10 port in bit units. Further, the main processor 37 has 16 channels of 16-bit timers/counters, that is, it has a timer array, and can effectively perform timer processing associated with zero cross point detection 111.

The analog input of the analog input capo I/32 has eight channels, and the scan priority can be changed by scanner control data sent from the main processor. For example, analog IN of channels O to 7 can be set to channels O to
When inputting scans in order up to 7, and when inputting channels 0 to 7 in order.
This can be changed such that only channels up to channel 4 are scanned in order, or only channels 4 to 7 are sequentially scanned and input. In the interface of the analog input port 32, there is a take storage RAM corresponding to each analog IN channel, and it is possible to determine the magnitude of a preset reference value without the intervention of the processors 36 and 37. In this way, if the result of the size determination deviates from a certain range, an internal interrupt is issued to the processor 37.

Therefore, when sampling and detecting a certain external analog quantity, the processor 37 only detects a change exceeding the threshold value.
Since the processor 37 can be configured to receive an internal interrupt,
checks the input take and interrupt channel at the time of an interrupt, sends a specific macro instruction to the macro code processor 36 according to the check result, and quickly controls the controlled variable to keep the controlled variable at the target value for the input take. The calculation results are output to, for example, a PWMm power port. These series of feedback controls, ie, "A/D conversion interrupt input of the controlled variable → interrupt check by the main processor 37 → calculation by the macro code processor 36 → output of the controlled variable from the PWM output port 34" are roughly explained. It can be done within 2g5ec. Therefore, for example, even if the analog controlled variable is the light intensity of a halogen lamp, the temperature of the front roller, the speed of a drum rotation motor, or the stabilization of high/low voltage power supply output, appropriate macro commands can be defined and handled accordingly. By facilitating the microinstruction set into the macrocode processor 36, each one macroinstruction can obtain these control information and, ultimately, perform control services for all operating components within tens of gsec. this is,
Sufficient response time for each of the operational components mentioned above.

In this way, the configuration of the present invention that centralizes the control of a plurality of analog operating components has the effect of replacing the control circuit in each analog operating component with one piece of hardware (macro code processor 36). Of course there is, but it has an even more important meaning. One is that the controlled variables of important analog operating components are centralized in the processor 36,37. This allows, for example, the main processor 37 to associate each operation between a plurality of analog operation components. This is particularly useful in a copying machine such as the embodiment. For example, the main processor 37 can easily know that only the control of the high pressure generator is malfunctioning at the same time as it knows that all of the other analog operating components are in control. Therefore, the main processor 37 can accurately and early enough know the cause of image quality deterioration before it becomes fatal, and can also issue a warning to the operator if necessary. Another advantage is that not only the controlled quantities of a plurality of important analog operating components are centralized in the processors 36 and 37, but also the controlled quantities thereof can be actively changed.

This is also particularly useful in a copying apparatus such as the embodiment. For example, even if the cause of image quality deterioration as described above is accurately identified, if possible, the main processor 37
This is because by changing the control amounts of other analog operating components, control that compensates for the deterioration in image quality can be easily performed. And the control to change this control amount is
For example, main processor 37 or macro code processor 36
This is possible by giving an appropriate offset to the take before giving A/D conversion output data to the take.

I/O: I/O 38 is a pulse generator for pulse motors, PLL for servo motors, and high-speed PWM.
(approximately 8-bit resolution, 40KH2), external clock input port (servo motor encoder input), one-shot pulse generator, free-run timer, and other mechatronic control functions based on analog quantities.

The communication device 39 is called μ-LAN (micro LAN),
It is equipped with a communication method using a globally standardized protocol and is capable of 64KBPS communication, allowing this controller to be used as an INS terminal.

Using the control device 30 of the embodiment having the configuration described above, analog control of the copying apparatus, particularly control of the power supply (high voltage, low voltage generator) and exposure lamp, will be described. FIG. 2 is a flowchart of the main control executed by the main processor 37.

In this case, by turning on the power to the copying machine, the control device 30
DC voltage Vcc is applied to. A in step Sl
Check the frequency of the C input power supply. This is counted by a counter at intervals of zero-cross pulses input to the control device 30 in the same way as in FIG.
The power supply frequency is determined by counting the pulses (10 pulses are input in the case of 50H2 and 12 pulses are input in the case of 60H2) with an interval of 00#Lsec.

In step S2, the AC input voltage is checked. This is to check fluctuations in input voltage.

This is done by stepping down the input voltage with a transformer or dividing it by resistance and inputting it to the A/D converter in the control device 30, and then the microcode processor 36 calculates an approximate formula to change the effective value of the input voltage. is determined. In step S3, the ON command and ON timing of the low voltage power source (DC 24V or other DC power source to be used) are measured, and if the conditions are satisfied, the low voltage power source is generated by the PWMm force of the control device 30 in step S4. This will be discussed in detail later. In step S5, the high-voltage power supply ON command and O
N timing is measured, and if the conditions are satisfied, a high voltage power source is generated in step S6. This will also be discussed later.

In step S7, the ON command and ON timing of the halogen lamp are measured, and if the conditions are satisfied, in step S8, the lamp is gradually turned on so that the filament of the lamp is not cut off by the rush current. Note that after lighting, the soft start in step S8 is bypassed. In step S9, the halogen lamp is lit and controlled. As explained above, the effective value of the lamp voltage is detected and compensation is performed so that there is no fluctuation in the brightness of the lamp. This will be discussed later. In step SIO, the OFF command and OFF timing of the high voltage power supply are measured. If the conditions are satisfied, high pressure generation is turned off in step Sll. In step S12, the lamp is turned off.
Measure the F command and OFF timing. If the conditions are satisfied, the lamp is turned off in step S13. Step S14
Now, measure the OFF command and OFF timing of the low voltage power supply. If the conditions are satisfied, turn off the low voltage power supply in step S15.
do. This timing is when the copy operation is completed.

FIG. 3 is a block configuration diagram showing a low-voltage power generation device according to an embodiment. This is a chopper type low voltage power supply. AC1'00V input is rectified tie-left and stored in capacitor C1, which is then connected to transistor U1 and driver N.
This method performs switching via PN to obtain a low voltage output. Channel 0 of the PWM output port is used for switching control. PWM tutee is 30-50K
H2 is used. R5゜R6 from DC24V output end
The monitor output resistance-divided by is input to a comparator CMP and used as an overvoltage protection circuit. At the time of overvoltage, the output of CMP becomes O level, and
The output of +I- stops. The other monitor output is input to an analog input port 32 within controller 30, and the data is passed to macro code processor 36. The macro code processor 36 calculates the difference between the input data and a predetermined reference value, and calculates the PWM setting value so that the output of the DC 24V low-voltage power supply has a one-step value. The result of this operation is set in the corresponding register in the PWM output port 34. In the case of sequence control that operates at a predetermined timing, such as in a copying machine, the control device 30 can predict load fluctuations and therefore can set the PWM value in advance.

FIG. 4 is a circuit diagram of the high pressure generator of the embodiment. The operating principle is the same as that of the low-voltage power supply generator, but the low-voltage power supply 28' smoothes the AC 100V input and performs switching, and the high-voltage generator 26' uses the low-voltage DC 24V input.
It uses V as input and switches it to generate high voltage. In the same way, the high frequency transformer T is switched at high speed by the channel 1 output PWMI of the PWM output port 34, and the necessary high voltage is generated in the charging corona 3 and the transfer corona 11. A corona discharge is caused by applying approximately 5.8 KV to the charging corona 3 and approximately 6.2 KV to the transfer corona ii. Then monitor the output voltage. Here, charged corona 3
The output voltage of the output voltage is monitored by resistor division of R1 and R2, and one is inputted to the monitoring comparator CMP, and when the output voltage is abnormally high, the AND gate output is stopped due to the 0 level of the comparator CMP output. The other monitor output is input to channel 1 of the analog input port 32, and the macro code processor 36 determines the PWMI tute ratio so as to obtain a stable high voltage output. Incidentally, in FIGS. 3 and 4, abnormal voltage values can be checked digitally via the analog input port 32, but by providing such a protective combiner CMP, the control device 3
Double safety measures have been taken to ensure that there is no problem even in the event of a failure.

FIG. 5 is a block diagram of the PWM output port 34' of the embodiment. The resolution of the PWMm power port is determined by the ticking (g calculation) period of the down counter, which is decremented by the divide-by-2 period of the clock CLK input. That is, it is expressed as PWM resolution=l/(clock frequency 72).

The LOW period and HIGH period of PWM power are expressed as LOW period=resolution x (256-W) (0≦W255) and HIGH period=resolution×W (0≦W255), where W is the set value of the pwM width register.

As shown in FIG. 5, the configuration of one channel of the PWM output port consists of a PWM width register, a PWM reference register, a free-run town counter, and a comparator. The free-run-town counter is constantly incremented at the frequency divided by two of the clock CLK period, and outputs (a(FRDC)) of 255 to O to the B input of the comparator.The principle of its operation is shown in Figure 6. be.

The town counter value is 00 in the reference register.
→ When changing to 255, the width/register settings are loaded via gate G. Therefore, even if a new value is written to the width/register at any time, it will not affect the current cycle, and the new settings will be applied from the next cycle. An output waveform according to the value will appear. The comparator compares the values of the reference register and town counter, and outputs a HIGH level to the output terminal A>H when the reference register output PWMRR>town counter output FRDC.
This is the output waveform of the Mm force port. At reset, the reference register and width register are cleared to 0, so PW remains unchanged until a value other than O is written to the width register.
The M output port is kept at LOW level.

FIG. 7 is a block diagram of the lamp controller.

The functions used by the control device 30 here include zero cross detection,
It has four functions: analog input port, counter, and one-shot trigger. The seven-point cross detector detects the intersection of the input signal and Ov when the input signal is an alternating current signal, and since the main body of the control device 30 is powered by a single power source, an external compensation circuit is required. The compensation circuit will be omitted. When a zero-crossing pulse is detected, the force counter of the main processor 37 is started and a predetermined count value (AC50H2 (7
), when the period reaches 10ms e c, half period 5m5ec), an internal interrupt occurs and the A/D of the analog input port
Start Conn8. Another operation is that the predetermined phase control amount of the halogen lamp is calculated based on the data previously converted by the A/D converter, and based on the calculation result, the one-shot trip force is activated and the triac It is the first thing to do. Therefore, the control device 30 performs the following operations in parallel: zero-cross pulse detection → counter coefficient → A/D start and one-shot trigger. For pseudo-effective value calculation, as shown in Figure 7, the waveform detected from both ends of the halogen lamp is rectified by a diode bridge BR, and the average value is generated analogously by a voltage divider circuit of resistors R1 and R2. Leads to A/D input.

FIG. 8 is a flowchart showing lamp control. These processes are activated and controlled by the microcode processor 36 as needed under the control of the main processor 37, depending on the processing speed requirements. Step S21
Then, it is detected whether the frequency is 60H2 or not. Step S
In 22.23, 50H2/60H2 respectively according to the discrimination.
Set the counter value to . In step S24, zero crossing is detected. In step S25, the coefficients of the counter start counting. In step 326, a predetermined value (in this case AC
The peak value of the input (5 msec in the case of 50H2) is detected, and the process advances to step S27 to start the A/D. In step 328, A/D data is set in a register. In step S29, the amount of variation in the AC input is calculated, and the amount of phase control thereof is calculated. step 330
Test the one-shot trigger tine mink to trigger the triac. This control is performed in step S26.
A/I) by the coefficients of the counters from 1 to 2) is carried out in parallel with the start of the evening. However, since the previous A/D conversion is performed and the one-shot rigger time is calculated based on the calculation result, the one-shot trigger starts one tempo later than the A/D converter at the initial time. In step S30, the one-shot trigger is activated. In this way, this operation is continued.

[Effects of the Invention] As described above, according to the present invention, by centralizing the control of a plurality of analog operating components, the control circuit in each analog operating component is integrated into one piece of hardware (macro code processor 36). By simply replacing it with , it is possible to centralize management of control information and unify control. Therefore, the device configured according to the present invention can be made more modular, more compact, and more multifunctional than conventional devices.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of a control device for a copying machine according to an embodiment, FIG. 2 is a flowchart of main control executed by a main processor 37, and FIG. 3 is a block diagram showing a low-voltage power supply generating device according to an embodiment. Fig. 4 is a circuit diagram of the high pressure generator of the embodiment, Fig. 5 is a block diagram of the PWM m power boat of the embodiment, Fig. 6 is a diagram showing the operating principle of the PWM output port of the embodiment, and Fig. 7 is a diagram showing the operating principle of the PWM output port of the embodiment. FIG. 8 is a block diagram of the lamp controller according to the embodiment. FIG. 8 is a flowchart 1 showing the lamp control of the embodiment. FIG. 9 is a sectional view showing the configuration of a conventional relatively small copying machine. Fig. 9 is a control circuit diagram of the copying machine, Fig. 11 is a block diagram showing the connection between the control device 30U1 (and U2, U3) and various analog operation components, and Fig. 12(a) is a control circuit diagram showing the connection between the control device 30U1 (and U2, U3) and various analog operating components. Figure 12 (b) is a block diagram of the lamp regulator; Figure 13 is a block diagram of the high voltage generator; Figure 14 is a low voltage DC power supply circuit. FIG. 2 is a block configuration diagram of a switching regulator. In the figure, 31... Input port, 32... Analog input port, 33... Output port, 34... PWM output port, 35... Main memory, 36... Macro code processor, 37... ...Main processor, 38...■1
0 controller, 39... communication device.

Claims (1)

[Claims] A control device for a device including an analog operating component includes a main processor that manages a control sequence of a plurality of components, and an A/D that converts an analog quantity detection signal of the analog operating component into a digital signal.
A device control device for equipment, comprising a conversion means and a sub-processor that executes a predetermined command specified by the main processor regarding a plurality of A/D conversion outputs.