JP2001075686A - Operation controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely reduce power consumption in waiting state without extremely reducing the operating efficiency of a main device or the response of a processing operation. SOLUTION: A controller executes the processing of an s23 each time picture formation processing is ended, and updates a mean access rate λ by using occurrence frequency F of a processing request, length S of a time band, and mean access rate λ' before update from a following formula; λ=(F/S)+(1-α)×λ' (0<=α<=1). Then, the controller executes the processing of s31-s34 while waiting for the input of the processing request, and calculates occurrence probability f(t) of the next processing request corresponding to a lapse time t since the picture forming processing is ended by using the mean access rate λ after update from a following formula; f(t)=1-exp(-λt), and compares the calculated occurrence probability f(t) with a threshold th, and when the occurrence probability f(t) is the threshold th or less, the controller sets a low power mode, and when the occurrence probability f(t) is more than the threshold th, the controller releases the low power mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a power state of a main unit during standby for an operation start request, a normal standby mode in which operation can be started, or a low power mode in which power consumption is lower than in a state in which operation can be started. And an operation control device set to any one of the above.

[0002]

2. Description of the Related Art Conventionally, reduction of power consumption in electric equipment has been demanded from the viewpoint of environmental protection. In particular, in an apparatus including a heating portion such as an image forming apparatus such as a copying machine, if the temperature of the heating portion is always maintained at a predetermined temperature regardless of whether or not the operation is performed, an operation start request not performing the operation is requested. Power is wasted during standby. For this reason, there is a device in which a low power mode for reducing power consumption is executed by maintaining the temperature of the heating portion at a temperature lower than the temperature during operation during standby.

However, if the low power mode is always executed after the end of the operation, the operation cannot be started immediately after the input of the operation start request. However, there is a problem that the operation efficiency of the main device is reduced.

Therefore, Japanese Patent Application Laid-Open Nos. Hei 5-297950 and Hei 7-110636 disclose a configuration in which the preheating temperature of the heating portion during standby is controlled based on the frequency of use of the main unit for each time zone. Is disclosed. Further, Japanese Patent Application Laid-Open No. H11-95626 discloses a configuration in which the time for executing the low power mode is shortened in a time zone in which the main device is used less frequently. further,
Japanese Patent Application Laid-Open No. 9-294174 discloses a configuration in which, when an operation start request for instructing start of operation after a predetermined reservation time is input, the low power mode is released in accordance with the reservation time, and a preset configuration is provided. A configuration for releasing the low power mode at a constant time period is disclosed.

[0005]

In the above-mentioned conventional configuration,
The power state during standby is controlled in accordance with the frequency of use of the main device, and in a frequently used time period, a standby mode of a power state in which operation can be started immediately when an operation start request is input is executed. You.

[0006] However, even in a frequently used time zone, there is a case where it is not always necessary to be in a state where the operation can be started simultaneously with the input of the operation start request. For example, in a device such as a printer to which a print request is output from a plurality of terminal devices connected via a network, there may be a time difference between when the print request is output from the terminal device and when the user goes to the printer. In such a case, the power consumption during standby should be reduced by executing the low power mode.

[0007] An object of the present invention is to provide a main device in which a plurality of operation start requests are generated at random, such as a device such as a printer connected to a plurality of terminal devices via a network. An object of the present invention is to provide an operation control device capable of reliably reducing the power consumption during standby without significantly reducing the response of the processing operation.

[0008]

The present invention has the following arrangement as means for solving the above-mentioned problems.

(1) A normal standby mode in which the power state of the main unit is set to a state in which operation can be started while the operation of the main unit is waiting for an operation start request after the end of operation of the main unit; And a low-power mode for selectively executing a low-power mode, in which the probability of occurrence of an operation start request with respect to a lapse of time after the operation of the main device is calculated for each time zone, and the calculated operation start request is calculated. The normal standby mode or the low-power mode is executed based on the occurrence probability of the above.

In this configuration, whether to execute the low power mode is determined based on the occurrence probability of the operation start request with respect to the lapse of time after the operation is completed. Therefore, in a general situation in which an operation start request is generated randomly, the occurrence probability of the operation start request increases with the lapse of time, and the execution frequency of the low power mode decreases correspondingly with the lapse of time. For this reason, the power consumption is reduced in a time zone in which the operation start requests are generated infrequently, and the operation efficiency is reduced due to a delay in the operation start time in a time zone in which a plurality of operation start requests are concentrated. There is no.

(2) The normal standby mode or the low power mode is selectively executed based on a comparison result between the occurrence probability of the operation start request and a predetermined threshold value.

In this configuration, whether or not to execute the low power mode is controlled based on the result of comparison between the occurrence probability of the operation start request and the predetermined threshold value, and the occurrence probability of the operation start request exceeds the threshold value. Until the low power mode is executed, and the occurrence probability of the operation start request exceeds the threshold, the normal standby mode is executed. Therefore, there is no need to perform complicated duty control when determining whether to execute the low power mode.

(3) The execution state of the low power mode is determined according to the occurrence probability of an operation start request.

In this configuration, until the occurrence probability of the operation start request exceeds a predetermined threshold, the low power mode is executed in a state corresponding to the occurrence probability of the operation start request. Therefore, whether or not to execute the low-power mode is finely controlled by comparing the occurrence probability of the operation start request with the predetermined threshold value.

(4) The occurrence probability f (t) is the length S of each time zone, the frequency F of the operation start request in each time zone,
And using the previous average arrival rate λ ′, λ = (F / S) + (1−α) × λ ′: where 0 ≦ α ≦ 1 and the new average arrival rate λ F (t) = 1-exp (-[lambda] t) using the elapsed time t after the end of the operation of the device, where t≥0.

In this configuration, the probability of occurrence f (t) of the next operation start request is calculated based on a known calculation method using the elapsed time t after the operation is completed. Therefore, the occurrence probability of the operation start request is reasonably calculated.

(5) A value obtained by dividing the operation time of the main unit by a predetermined unit operation time is set as the number of times of inputting the operation start request.

In this configuration, when the operation time of each operation executed based on the operation start request is different, it is assumed that the operation start request is input every predetermined unit operation time, and the number of times the operation start request is input is reduced. Counted. Therefore,
For an operation in which the operation time is a multiple of the unit operation time, it is considered that a plurality of operation start requests have been input, and the occurrence frequency of the operation start request used for calculating the probability of occurrence of the operation start request is more than one. It is counted in consideration of the length of operation time in the operation.

(6) In the low power mode, the operation amount related to the input operation start request is integrated, and the low power mode is continuously executed until the integrated value reaches a predetermined amount.

In this configuration, while the low power mode is being executed, an operation start request whose operation amount is equal to or more than a predetermined amount is input, or an operation related to the plurality of input operation start requests is input. The operation according to the operation start request is not started until the sum of the amounts becomes equal to or more than the predetermined value. Therefore, the occurrence probability of the operation start request is low, and the power consumption during the execution of the low power mode is further reduced.

(7) While the low power mode is continued, an elapsed time from the input of the operation start request is measured, and the low power mode is released when a predetermined time has elapsed.

In this configuration, when a predetermined time elapses from the input of an operation start request for an operation that has not been executed due to the continuation of the low power mode, the integrated value of the operation amount related to the operation start request becomes greater than the predetermined value. The operation is started regardless of whether or not. Therefore, the start of the operation according to the operation start request input in the low power mode is not significantly delayed.

(8) The low-power mode is canceled when the high-urgency operation start request is input while the low-power mode is ongoing, wherein the low-power mode includes urgent data. .

In this configuration, if the operation start request input in the low power mode includes data indicating urgency, the low power mode is immediately released. Therefore,
The start of the urgent operation is not significantly delayed.

(9) The main device is connected to a plurality of terminal devices via a network, and operation start requests are input from the plurality of terminal devices.

In this configuration, the present invention is implemented in a main unit to which operation start requests are input from a plurality of terminal devices via a network. Therefore, when operation start requests are irregularly input from a plurality of terminal devices connected via a network, power consumption is reduced without lowering the operation efficiency of the main device.

[0027]

FIG. 1 is a block diagram showing a configuration of a printer to which an operation control device according to an embodiment of the present invention is applied. The printer 1 as a main device of the present invention is connected to a plurality of terminal devices 3 via a network 2, and an operation start request (processing request) generated in the terminal device 3 is input via the network 2. Printer 1
Includes a control device 11, a power supply unit 12, and a printer engine 13, and executes an image forming process based on print data output from the terminal device 3 in response to a processing request.

The control device 11 is an operation control device according to the present invention. The control device 11 receives a processing request input via the network 2, converts print data into image data, supplies the image data to the printer engine 13, and 13
The control data for setting the power supply mode in the standby state is output to the power supply unit 12. The power supply unit 12 supplies power to the control device 11 and the printer engine 13 and switches a power supply mode for the printer engine 13 based on control data output from the control device 11.

The printer engine 13 executes, for example, an electrophotographic image forming process based on the image data supplied from the control device 11, and forms the image on the surface of the photoreceptor through the respective steps of charging, exposure and development. After transferring the formed toner image onto the recording paper, the recording paper is heated and pressed to firmly fix the toner image on the recording paper. Therefore, the printer engine 13 includes a fixing device that raises the temperature to a temperature at which the toner image on the recording paper can be melted, and the power supply unit 12 adjusts the temperature of the fixing device to a set temperature according to the power supply mode. Power is supplied to the printer engine 13 as described above.

That is, the power supply state to the printer engine 13 at the time of standby for the image forming processing includes a normal standby mode in which the temperature at which the toner image can be melted is set as the temperature of the fixing device, and a temperature lower than the temperature at which the toner image can be melted. The mode can be selectively switched to a low power mode in which a temperature higher than room temperature is set to a fixing device temperature. In the normal standby mode, a relatively large amount of power is consumed, but the image forming process can be started immediately upon input of a processing request. On the other hand, in the low power mode, the image forming process cannot be started until the temperature of the fixing device rises to a temperature at which the toner image can be melted after the input of the processing request, but the power consumption can be reduced.

FIG. 2 is a functional block diagram of a control device constituting the printer. FIG. 3 is a diagram showing an example of a configuration of each data input / output to / from the control device. A processing request and print data are input to the control device 11 via the I / O 21. As shown in FIG. 3A, the processing request is added when a job number specifying each processing request, a job processing request amount indicating a print data amount related to the processing request, and a request for immediate start of the processing. Including immediate processing specification. The control device 11 stores the input processing request and print data in the holding stack 22 for each processing request as shown in FIG.

When a processing request is input, the control device 11 stores the tally result in the tally result register 23. As shown in FIG. 3 (C), the totaling result includes the day of the week and the time period when the processing request occurred, the frequency of occurrence of the processing request, and
It contains the average arrival rate and is stored in the state shown in FIG.
The day and time zone are determined based on data read from the timer / calendar circuit 24. As is apparent from FIG. 3D, the frequency of occurrence of the processing request is counted for each time zone having a predetermined length set in advance, and the average arrival rate is calculated. The processing request occurrence frequency is a count value of the number of times a processing request is input in each time slot, and is incremented each time a processing request is input. Average arrival rate λ
Λ = (F / S) + (1−) using the frequency F of the processing request, the length S of the time zone, and the average arrival rate λ ′ before updating every time the time zone of the current time changes. α) × λ ′: However, 0 ≦ α ≦ 1 is calculated by Expression 1.

It should be noted that the frequency F of the processing requests stored in the tally result register 23 is equal to the job number included in each processing request.
It is counted in consideration of the difference in the processing request amount. That is, the control device 11 divides the job processing request amount included in the input processing request by the basic unit amount U stored in the basic unit holding register 25 in advance, and divides the quotient by the processing request amount in the aggregation result register 23. It is added to the occurrence frequency F. The basic unit amount can be, for example, the print data amount for one page. In this case, the occurrence frequency F is counted based on the print data for one page.

By using λ = (F / S + λ ′) / 2 as an example of the above equation 1, the average arrival rate λ can be easily calculated by arithmetic averaging.

The control device 11 uses the calculated average arrival rate λ based on the probability calculation program 26 stored in advance to request the next processing request according to the elapsed time t after the end of the image forming processing. Is calculated by f (t) = 1−exp (−λt) (2). Here, the elapsed time t takes a positive value. Therefore, the occurrence probability f (t) changes exponentially with time as shown in FIG.

The control unit 11 calculates the calculated occurrence probability f
(T) is compared with a threshold value th stored in the threshold value holding register 27 in advance, and a power supply state during standby of the image forming process is determined. That is, as shown in FIG. 5, when the image forming process ends at time t0, the control device 11 sets the power supply state to the printer engine 13 to the low power mode, and at time t1, the occurrence probability f (t) exceeds the threshold th. And the power supply state to the printer engine 13 is switched to the normal standby mode. While the low power mode is set, the image forming process is not executed in principle.

However, if the processing request input during the low power mode includes the immediate processing designation, the control unit 11 immediately releases the low power mode. Therefore, the start of the urgent image forming process is not significantly delayed.

The control unit 11 keeps track of the elapsed time from the end of the image forming process in the elapsed time holding register 28, and when a processing request is input during the low power mode, the elapsed time holding register 28 If the elapsed time measured by the timer has elapsed the delay time t2 stored in the delay time holding register 29 in advance, the control unit 11 immediately releases the low power mode. Therefore, the power consumption can be reduced without significantly lowering the operation efficiency of the printer 1.

Further, the control section 11 integrates the job processing request amount included in the processing request input during the low power mode in the total processing amount holding register 31, and the integrated value (total processing amount TA) starts processing. When the processing start amount A stored in the amount holding register 32 in advance is exceeded, the low power mode is released. That is, the control unit 11 continues the low-power mode until the delay time t2 elapses during the low-power mode or the occurrence probability f (t) exceeds the threshold th. Saves without performing the image forming process, and continues the low power mode until the stored print data amount exceeds a predetermined processing start amount. Therefore, the power consumption is further reduced without significantly lowering the operation efficiency of the printer 1.

FIG. 6 is a flowchart showing a processing procedure of the control device. When the power of the printer 1 is turned on, the control device 11 firstly operates the timer / calendar circuit 24.
The current day of the week and time zone are determined based on the data read from (s0). This determination result is used when referring to the tally result register 23. Thereafter, as an initial setting, the threshold holding register 27 and the basic unit holding register 2
5. In the delay time holding register 29, the total processing amount holding register 31, and the processing start amount holding register 32, the set value of the threshold th, the set value of the basic unit amount U, the set value of the delay time t2, and the The initial value “0” and the set value of the processing start amount A are stored (s1 to s5), and the value of λ to be set for each time zone is updated based on the above equation 1 (s6).

Next, the control device 11 determines whether or not a new processing request has occurred (s11). If a new processing request has occurred, the control device 11 determines whether the processing request includes an immediate processing designation. It is determined whether or not it is (s12). Control device 1
1 if the new processing request includes an immediate processing specification,
The image forming process is immediately executed (s13).

If the new processing request does not include the immediate processing specification, the control device 11
The total processing amount TA stored in the total processing amount holding register 31 is updated by adding a division value of the ob processing request amount by the basic unit amount U (s14), and the print data related to the processing request is stored. Thereafter (s15), the total processing amount TA is compared with the processing start amount A (s15). When the total processing amount TA exceeds the processing start amount A, the control device 11 executes the image forming process related to the stored print data (s13), and when the total processing amount TA is equal to or less than the processing start amount A. Waits for the next processing request to be generated (s11).

If no new processing request has occurred in s11, the control device 11 compares the elapsed time t with the delay time t2 (s21). When the elapsed time t exceeds the delay time t2, the control device 11 determines whether or not there is stored print data (s22), and when the print data is stored, executes the image forming process. Do (s
13).

The control device 11 updates the value of the frequency F by the above formula 1 every time the image forming process for the print data according to one processing request is completed (s23).
After the elapsed time t counted by the elapsed time holding register 28 is set to “0” (s24), the presence or absence of the stored print data is determined (s25), and the image forming process for all the stored print data is performed. Is executed (s25 → s
13).

The control device 11 clears the value of the total processing amount TA directly when there is no print data in s22, and clears the value of the total processing amount TA when no print data is stored in s25 (s26), and then sets the current time. It is determined whether or not the time zone has passed and the time zone has moved to another time zone (s2).
7). In this determination, if the time zone in which the current time is set has elapsed, the control device 11 returns to the time zone determination process (s27 → s0).

If the elapsed time t does not exceed the delay time t2 in s21,
In the case where the time zone in which the current time is set has not elapsed, the occurrence probability f (t) is calculated by Expression 2 (s31). The control device 11 compares the calculated occurrence probability f (t) with the threshold th (s32), and
If (t) is equal to or smaller than the threshold th, the low power mode is set (s33). If the occurrence probability f (t) exceeds the threshold th, the low power mode is canceled (s34).

As described above, the operation control device according to the present embodiment is a printer that performs image forming processing based on a randomly generated processing request, and reduces the power consumption during the standby of the processing request to the normal standby mode. In a printer designed to improve the response of the image forming process and reduce the running cost by changing to the low power mode, the probability of occurrence of the next processing request after the end of the image forming process is determined by the image forming process. Image formation processing determined based on the probability of occurrence of past processing requests, taking into account that the lowest immediately after the end of processing and rising with the passage of time after the end of image formation processing The low-power mode is executed only after a predetermined time elapses until a predetermined time has elapsed. As a result, it is possible to reduce the amount of standby power consumption while suppressing the occurrence of user dissatisfaction due to a delay in the start of the image forming process in a situation where the processing requests are concentrated.

FIG. 7 is a timing chart showing the contents of processing in the operation control device according to the second embodiment of the present invention. The operation control device according to this embodiment sets the power supply state to the printer engine 13 to the low power mode from time t0 when the image forming process ends to time t1 when the occurrence probability f (t) exceeds the threshold th, and sets the occurrence probability f ( t)
Exceeds the threshold th, the mode is switched to the normal standby mode at a rate corresponding to the occurrence probability f (t). That is, the occurrence probability f
After (t) exceeds the threshold th, the normal standby mode and the low power mode are executed at a ratio of f (t): 1-f (t).

FIG. 8 is a flowchart showing a part of the processing procedure of the operation control device according to the second embodiment.
When the occurrence probability f (t) exceeds the threshold th in the process of s32 in FIG.
The occurrence probability f (t) calculated in the process of step 31 is multiplied by “100”, and the value obtained by truncating the decimal part by the floor function is set as a new occurrence probability F (t) (s41).

Next, the operation control device divides the positive integer generated by the rand function by "100" and sets the remainder as a comparison value r (s42). This process is executed based on the random number generation program 33 stored in the control device 11. The operation control device compares the occurrence probability F (t) with the comparison value r (s43), and if the occurrence probability F (t) is equal to or smaller than the comparison value r, continues the low power mode (s3).
3) If the occurrence probability F (t) exceeds the comparison value r, the mode is switched to the normal standby mode (s34).

Through the above processing, the power consumption state can be more finely controlled in accordance with the probability of the occurrence of the processing request while the processing request is on standby.

In the above-described embodiment, the case where the operation control device of the present invention is applied to a printer has been described. However, in other devices in which the power supply state is changed while waiting for a processing request, the operation control device can be used. The invention can be implemented as well.

[0053]

According to the present invention, the following effects can be obtained.

(1) By deciding whether or not to execute the low-power mode based on the probability of occurrence of an operation start request with respect to the lapse of time after the end of operation, power consumption can be reduced in a time period when the frequency of occurrence of the operation start request is low The amount can be reduced, and the operation efficiency can be prevented from being reduced due to the delay of the operation start time in a time zone in which a plurality of operation start requests are concentrated.

(2) Controlling whether or not to execute the low power mode based on the result of comparison between the occurrence probability of the operation start request and a predetermined threshold value, and controlling the low power mode until the occurrence probability of the operation start request exceeds the threshold value By executing the mode, when the probability of occurrence of the operation start request exceeds the threshold, by executing the normal standby mode,
Whether to execute the low power mode can be determined by simple control.

(3) Until the occurrence probability of the operation start request exceeds a predetermined threshold value, the low power mode is executed in a state corresponding to the occurrence probability of the operation start request, thereby reducing the occurrence probability of the operation start request. By comparing with a predetermined threshold value, it is possible to finely control whether to execute the low power mode.

(4) Elapsed time t after the operation is completed
Is used to calculate the probability of occurrence of the next operation start request f (t) based on a known calculation method, so that it can be rationally determined whether to execute the low power mode.

(5) If the operation time of each operation executed based on the operation start request is different, the number of times the operation start request is input is counted assuming that the operation start request is input every predetermined unit operation time. Accordingly, it is possible to more rationally determine whether to execute the low power mode based on the occurrence probability of the operation start request calculated in consideration of the length of operation time in a plurality of operations.

(6) While executing the low power mode,
Do not start the operation according to the operation start request until an operation start request whose operation amount is equal to or more than the predetermined amount is input, or the sum of the operation amounts according to the plurality of input operation start requests is equal to or more than the predetermined value. Thereby, the power consumption during the execution of the low power mode is further reduced.

(7) If a predetermined time has elapsed since the input of the operation start request for an operation that has not been executed yet due to the continuation of the low power mode, is the integrated value of the operation amount related to the operation start request equal to or more than the predetermined value? By starting the operation irrespective of whether or not the operation is started, it is possible to prevent the start of the operation according to the operation start request input in the low power mode from being significantly delayed, and to start the operation by reducing the power consumption during standby. Response degradation can be minimized.

(8) If the operation start request input in the low-power mode includes data indicating urgency, the low-power mode is immediately released to significantly delay the start of the urgent operation. It can be prevented, and urgency of operation can be secured.

(9) In the main device to which operation start requests are input from a plurality of terminal devices via the network, the operation start request is received from the plurality of terminal devices connected via the network by implementing the present invention. When the input is irregular, the power consumption can be reduced without lowering the operation efficiency of the main device.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a printer to which an operation control device according to an embodiment of the present invention is applied.

FIG. 2 is a functional block diagram of a control device constituting the printer.

FIG. 3 is a diagram showing an example of a configuration of each data input / output to / from the control device.

FIG. 4 is a diagram showing a change with time of an occurrence probability calculated by the control device;

FIG. 5 is a timing chart showing processing contents in the control device.

FIG. 6 is a flowchart showing a processing procedure of the control device.

FIG. 7 is a timing chart showing processing contents in an operation control device according to a second embodiment of the present invention.

FIG. 8 is a flowchart showing a processing procedure of the operation control device according to the second embodiment.

[Explanation of symbols]

 1-Printer (Main Device) 2-Network 3-Terminal Device 11-Control Device (Operation Control Device) 12-Power Supply Unit

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (Reference) 9A001 F-term (Reference) 2C061 AP01 AP04 HH11 HT03 HT04 HT06 HT08 HT11 2H027 DA38 EA15 EF16 ZA01 5B011 EB08 KK02 LL14 5B021 AA01 0000 AA01 GA06 GA07 JA07 KA02 KA05 LA07 MA07 MA09 9A001 BB02 BB03 BB04 CC02 DD07 EE02 GG05 HH23 JJ12 JJ35 KK42 LL09

Claims (9)

[Claims] 1. A normal standby mode in which a power state of a main unit is set to a state in which operation can be started during a standby of an operation start request after an operation of a main unit is completed, and a power state of the main unit is set to a power consumption amount. A low power mode for selectively setting a low power mode, and an operation control device for selectively executing, for each time slot, an occurrence probability of an operation start request with respect to a lapse of time after the operation of the main device is completed. An operation control device for executing a normal standby mode or a low power mode based on an occurrence probability. 2. The operation control device according to claim 1, wherein a normal standby mode or a low power mode is selectively executed based on a comparison result between the occurrence probability of the operation start request and a predetermined threshold. . 3. The operation control device according to claim 2, wherein the execution state of the low power mode is determined according to an occurrence probability of an operation start request. 4. The occurrence probability f (t) is obtained by using the length S of each time zone, the frequency F of operation start requests in each time zone, and the previous average arrival rate λ ′, and λ = ( F / S) + (1−α) × λ ′: where, using the new average arrival rate λ calculated according to 0 ≦ α ≦ 1, and the elapsed time t after the operation of the main device ends, f (t 4.) The operation control device according to claim 1, wherein the value is calculated by the following formula: t) = 0-exp (-[lambda] t). 5. The operation control device according to claim 1, wherein a value obtained by dividing the operation time of the main device by a predetermined unit operation time is set as the number of times of inputting the operation start request. 6. In the low power mode, the operation amount according to the input operation start request is integrated, and the low power mode is continuously executed until the integrated value reaches a predetermined amount. 4. The operation control device according to 2 or 3. 7. A low power mode is maintained while the low power mode is continued, and a time elapsed from the input of the operation start request is measured, and the low power mode is released when a predetermined time has elapsed. 3. The operation control device according to claim 1. 8. The low power mode is released when the operation start request includes data indicating urgency and a high urgency operation start request is input during the continuation of the low power mode. Item 8. The operation control device according to item 6 or 7. 9. The apparatus according to claim 1, wherein the main device is connected to a plurality of terminal devices via a network, and an operation start request is input from the plurality of terminal devices. Motion control device.