JP6155789B2 - Product sales processing system - Google Patents

Description

  The present invention relates to a POS system having a standby power supply function.

  Conventionally, a POS (Point Of Sales) register with a simple UPS (Uninterruptible Power Supply) function that supplies power so that a computer can operate even when power supply from the main power supply is stopped due to the influence of a power failure or the like Has been proposed (see, for example, Patent Document 1). In the POS register of Patent Document 1, when a power supply abnormality due to the influence of a power failure or the like is detected, the power supply is switched from the main power supply to the simple UPS power supply, and the abnormal termination is caused by immediately performing a shutdown operation. It is preventing.

Japanese Patent Laid-Open No. 2005-004380

  However, once the POS register is shut down, it takes time to restart. Therefore, in the case of erroneous detection, there is a problem that the POS register cannot be used until the restart is completed, although the POS register can be normally used. When such a problem occurs, there is a possibility that business may be hindered.

  In view of the above circumstances, an object of the present invention is to provide a technique for reducing the influence of erroneous detection.

One aspect of the present invention is a detection means for detecting a power supply stop by a main power supply of the device itself, and an operation for switching the power supply source from a main power supply to a standby power supply when the detection means detects the power supply stoppage. And a communication unit that transmits and receives a notification indicating whether or not the power supply stop is detected between another device and a control unit that performs predetermined control based on the notification received by the communication unit. Control means, and when the control means receives notification that the power supply stoppage is not detected from the other apparatus, the control means changes its own power supply source from the standby power supply to the main power supply. A merchandise sales processing system that performs control so as to perform a switching operation.
As a result, even when the own device detects the stop of power supply by the main power supply, the power supply source is switched due to a false detection unless another POS register detects the power supply stop by the main power supply. Therefore, switching from the standby power supply to the main power supply was executed. Therefore, it becomes possible to reduce the influence of erroneous detection.

Wherein the control means is the above-described merchandise sales processing system, when a notification of the detected stopping said power supply from said another device is received, or, detecting the power outage from the other device when the notification indicating whether the is not received, and controls to perform the operations of the shutdown of the apparatus.
As a result, not only when the other POS register 100 detects the power supply stop, but also when the network is stopped due to the influence of a power failure or the like, it is possible to shut down to an eye that ends abnormally.

One aspect of the present invention is the above-described merchandise sales processing system, wherein the control means includes a feature that performs the switching operation is controlled to perform the operations of the shutdown if it is unable to switch To do.
As a result, the system can be shut down before the standby power supply is exhausted and abnormally ends.

One aspect of the present invention is the above-described commodity sales processing system, in which, when the power supply stop is detected, the control unit determines that the number of devices not detecting the power supply stop is the own device. wherein when more than the number of the power supply detects the stop device does not perform the operation of shutdown of the apparatus, controls the power supply of its own device to perform switching operation Order operation to the main power from the standby power supply may include It is characterized by.
As a result, it can be determined that there is a high possibility that the switching of the power supply source is a false detection, so that the standby power supply can be switched to the main power supply without performing a shutdown.

  According to the present invention, it is possible to reduce the influence of erroneous detection.

It is a figure which shows the system configuration | structure of a POS system. It is a block diagram which shows the structure of the POS register | resistor 100 in one Embodiment of this invention. It is a figure which shows the specific example of a power supply status information database. It is a figure showing the result of each POS register | resistor 100 on LAN transmitting / receiving the power supply notification. It is a flowchart which shows the operation | movement of the control processing at the time of the electric power supply stop in this invention. It is a sequence diagram which shows an example of operation | movement of the POS system in this invention. It is a sequence diagram which shows an example of operation | movement of the POS system in this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a system configuration of a POS system. As shown in FIG. 1, the POS system of the present invention includes N (N is an integer of 1 or more) POS registers 100 (100-1 to 100-N). Each of the POS registers 100-1 to 100-N is connected by a LAN (Local Area Network) and can communicate with each other. The LAN may be wired or wireless. Hereinafter, the POS registers 100-1 to 100-N are collectively referred to as the POS register 100 unless particularly distinguished.

  The POS register 100 registers and settles a product purchased by a customer (hereinafter referred to as “purchased product”) by an operation of a store clerk. The POS register 100 has a UPS function, and can appropriately switch the power supply source from the main power source to the standby power source and from the standby power source to the main power source. For example, the POS register 100 can switch the power supply source from a main power source (described later) to a standby power source (described later) when a power failure or the like is detected. Therefore, the POS register 100 can operate by switching the power supply source to the standby power source even when there is a power failure or the like.

  In addition, when the operation of switching the power supply source is performed, the POS register 100 transmits / receives information on the power supply state to / from other POS registers 100 on the LAN. More specifically, the POS register 100, when performing an operation of switching the power supply source from the main power source to the standby power source, with respect to all other POS registers 100 on the LAN (POS register 100) A main power supply state notification (hereinafter also simply referred to as “power state notification”) including a detection result (for example, “detection”) indicating that a power supply stop (stop of power supply) by the main power source is detected is transmitted. To do.

  On the other hand, when the POS register 100 receives a power supply state notification transmitted from another POS register 100 on the LAN, the POS register 100 notifies the other POS register 100 that is the transmission source of the power supply state notification of its own device. A power state notification including a detection result indicating whether or not a power supply stoppage by the main power source is detected is transmitted. That is, when a certain POS register 100 performs an operation of switching the power supply source from the main power supply to the standby power supply, the POS register 100 detects the power supply stoppage in all other POS registers 100 on the LAN. A power supply state including a detection result indicating whether or not all other POS registers 100 that have received the power supply state notification have detected a power supply stoppage by their own main power supply. A notification is received from the respective POS register 100.

  The POS register 100 can determine the current power state (hereinafter simply referred to as “power state”) of the other POS registers 100 by transmitting and receiving the power state notification. The power state includes, for example, a state in which the POS register 100 is operated by power supply from the main power source (hereinafter referred to as “normal power state”), and a state in which the POS register 100 is operated by power supply from the standby power source (hereinafter “ And the power-off state.

When the POS register 100 receives from the other POS register 100 a power state notification including a detection result indicating that the power supply stoppage by the main power source has been detected, the POS register 100 determines that the other POS register 100 is in the standby power state.
When the POS register 100 receives a power state notification including a detection result (for example, “non-detection”) indicating that the power supply stoppage by the main power supply has not been detected, the other POS register 100 It is determined that the register 100 is in the normal power supply state.
In addition, the POS register 100 may receive a response from another POS register 100 within a predetermined time after transmission of a power state notification including a detection result indicating that power supply stoppage by the main power supply has been detected (by the main power supply). When the power supply state notification including the detection result indicating whether or not the power supply is detected is not received), it is determined that the other POS register 100 is in the power-off state.

  FIG. 2 is a block diagram showing the configuration of the POS register 100 in one embodiment of the present invention. The POS register 100 includes a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, a scanner unit 104, a store clerk display unit 105, and a customer display unit 106. An operation unit 107, a communication unit 108, a buzzer 109, a receipt issuing port 110, a printing unit 111, a main power supply unit 112, a power supply unit 113, and a standby power supply unit 114. The functional units of the POS register 100 are connected to each other via the bus 1.

  The CPU 101 is a central processing unit and reads a program stored in the ROM 102 and develops it in the RAM 103. The CPU 101 controls the overall operation of the POS register 100 by executing each step of the developed program.

  For example, when the power supply stop by the main power supply unit 112 is detected, the CPU 101 (control unit) controls the operation of switching the power supply source of the own device from the main power supply unit 112 to the standby power supply unit 114. The CPU 101 (control unit) controls an operation of switching the power supply source of the own apparatus from the standby power supply unit 114 to the main power supply unit 112 under a predetermined condition (described later).

  Further, for example, the CPU 101 (control unit) may perform other operations after the operation of switching the power supply source from the main power supply unit 112 to the standby power supply unit 114 is performed (when power supply stoppage by the main power supply unit 112 is detected). Based on the power status notification transmitted from the POS register 100, predetermined control is performed.

  Specifically, the CPU 101 (control means), for example, when the other POS register 100 has not detected the power supply stop by the main power supply unit 112, the power supply source of its own device is connected from the standby power supply unit 114 to the main power supply. Control is performed so as to switch to the unit 112. On the other hand, when the other POS register 100 detects that the main power supply unit 112 has stopped supplying power, the CPU 101 performs control such as shutting down its own device (for example, shutting down, restarting, etc.). .

  Although there are a plurality of other POS registers 100 on the LAN, the POS register 100 that detects the stop of power supply by the main power supply unit 112 (that is, the detection result indicating that the stop of power supply by the main power supply is detected). The transmitted POS register 100), and the POS register 100 that has not detected the stop of power supply by the main power supply unit 112 (that is, the POS register 100 that has transmitted the detection result indicating that the stop of power supply by the main power supply has not been detected); , There is an operation such as shutdown or switching from the standby power supply unit 114 to the main power supply unit 112 according to the number of POS registers 100 (for example, difference in number, ratio of numbers, etc.). You may control whether operation is performed.

  As an example, when the CPU 101 (control unit) detects a power supply stop by the main power supply unit 112, the number of POS registers 100 that have not detected a power supply stop on the LAN includes the power including the own device on the LAN. When the supply stop is detected more than the number of POS registers 100, control is performed so as to perform an operation of switching the power supply source of the own apparatus from the standby power supply unit 114 to the main power supply unit 112 without performing an operation such as a shutdown.

  When the CPU 101 (control unit) controls the operation of switching the power supply source of its own device from the standby power supply unit 114 to the main power supply unit 112, when the power supply source is not switched to the main power supply unit 112 (for example, The main power supply unit 112 may be controlled to perform an operation such as a shutdown).

The ROM 102 is a read-only memory, and stores a program for operating the POS register 100 in advance.
The RAM 103 is a read / write memory that stores various information. In the RAM 103, a program read from the ROM 102 is expanded. The RAM 103 stores various data generated by executing the program. For example, the RAM 103 stores a power state information database (described later).

The scanner unit 104 optically reads a barcode (product code) attached to a product.
The store clerk display unit 105 is an image display device such as a CRT (Cathode Ray Tube) display, a liquid crystal display, or an organic EL (Electro Luminescence) display. The store clerk display unit 105 accepts and displays operations such as mode switching, setting, and registration. The display surface of the display unit 105 for the store clerk is provided with a touch panel provided with a touch key (soft key) that is a transparent contact switch. Product information on which product registration is performed, total amount of purchased products, and the like Is displayed. The product information is information about the product.

  The customer display unit 106 displays, for a customer, product information for which product registration has been performed, the total price of purchased products, and the like. The customer display unit 106 is a light-emitting display device using a liquid crystal display or the like. For example, the customer display unit 106 emits and displays numbers on its surface by 7-segment display or dot display (full dot display).

  The operation unit 107 is configured using an existing input device such as a keyboard, a pointing device (such as a mouse or a tablet), a button, or a touch panel. The operation unit 107 includes operation means for operating the POS register 100. The operation means is, for example, a completion key (for example, a subtotal key) declaring completion of product registration, a correction key, a preset key, a numeric key, a gift certificate key, a credit key, an electronic money key, and the like. Further, for example, when the store clerk presses an operation key (preset key), the operation unit 107 receives an operation input for a product code or the like that is preset and registered corresponding to the key. Note that the operation means of the operation unit 107 may be arranged as a button such as a mechanical key (hard key) or may be arranged on a touch panel provided on the display surface of the display unit 105 for clerk.

The communication unit 108 communicates with other POS registers 100 via a network. For example, the communication unit (communication means) 108 transmits / receives a notification (power supply state notification) indicating whether or not a power supply stop has been detected with another POS register 100. The power status notification stores the POS number of the POS register 100 that is the transmission source in addition to the detection result described above.
The buzzer 109 generates a buzzer sound according to an instruction from the CPU 101.

The receipt issuing port 110 discharges a sheet printed by the printing unit 111 built in the POS register 100.
The printing unit 111 includes a thermal head (not shown) and a platen roller that is set by being pressed against the thermal head, and the platen roller is driven by a stepping motor. The sheet is conveyed between the thermal head and the platen roller, and the stepping motor is driven by a predetermined pulse by a signal from the CPU 101 so that a predetermined amount of the sheet is issued.

The main power supply unit 112 converts commercial AC current fed from the power plug of the POS register 100 into DC current, and supplies power to the power supply unit 113.
The power supply unit 113 charges the standby power supply unit 114 with power supplied from the main power supply unit 112 and supplies power to each functional unit of the POS register 100. The power supply unit (detection unit) 113 detects the stop of power supply by the main power supply unit 112. More specifically, the power supply unit (detection means) 113 monitors whether or not power is supplied from the main power supply unit 112. When the power plug is disconnected or a power failure occurs, It is detected that the power supply from the main power supply unit 112 to the supply unit 113 is stopped. In addition, when the power supply unit (power supply unit) 113 detects that the main power supply unit 112 has stopped supplying power, the power supply unit (power supply unit) 113 performs an operation of switching the power supply source from the main power supply unit 112 to the standby power supply unit 114.

Thus, the POS register 100 can operate with the power stored in the standby power supply unit 114 even after the power supply from the main power supply unit 112 is stopped. After that, when the power plug is connected to the power source or when the power failure is restored, the power supply unit 113 detects the resumption of power supply from the main power source unit 112 and supplies the power supply source from the standby power source unit 114 to the main power source. Switch to the power supply unit 112.
The standby power supply unit 114 accumulates the power supplied by the power supply unit 113. When the power supply unit 113 switches the power supply source from the main power supply unit 112 to the standby power supply unit 114, the standby power supply unit 114 supplies the accumulated power to each functional unit of the POS register 100.

FIG. 3 is a diagram showing a specific example of the power supply state information database.
The power status information database stores power status information indicating the power status of the other POS registers 100. The power state information database shown in FIG. 3 is a power state information database in the RAM 103 of the POS register 100-1, and the POS register 100-1 includes all other POS registers 100 on the LAN (POS register 100-2). An example of power state information of another POS register 100 based on the detection result stored in the power state notification received from the POS register 100-N) is shown.

  The power state information database stores, for example, each value of the POS number, the power state, and the last update time in association with each other. The POS number is an identification number that uniquely identifies another POS register 100. The power status represents the current power status of the other POS register 100. In the specific example shown in FIG. 3, the power state value “0” indicates that the other POS register 100 is in the power off state, and the power state value “1” indicates that the other POS register 100 is normal. The power supply state indicates that the power supply state value “2” indicates that the other POS register 100 is in the standby power supply state. The last update time represents the latest time when the power supply state is updated.

  In the example shown in FIG. 3, a plurality of POS numbers (POS2 to POS-N) exist in the power status information database. In FIG. 3, the top row of the power supply status information database has a POS number value of “POS2”, a power supply status value of “0”, and a last update time value of “2013 / XX / YY 13:00:30. ". That is, the POS register 100-2 identified by the POS number “POS2” is currently in a power-off state, and the time when the power state is updated by the POS register 100-1 is 13:00 on XX month YY in 2013. It is shown that it is 30 minutes.

  In FIG. 3, the second row of the power status information database has a POS number value “POS3”, a power status value “1”, and a last update time value “2013 / XX / YY 13: 01:00 ". That is, the POS register 100-3 identified by the POS number “POS3” is currently in the normal power state, and the time when the power state is updated by the POS register 100-1 is 13:00 on XX month YY in 2013. It is shown that it is minute 00 seconds.

  Also, in FIG. 3, the bottom row of the power supply state information database has a POS number value of “POS-N”, a power supply state value of “2”, and a last update time value of “2013 / XX / YY 13”. : 01:30 ". That is, the POS register 100-N identified by the POS number “POS-N” is currently in the standby power state, and the time when the power state is updated by the POS register 100-1 is 13th of XX month YY of 2013. It is shown that the time is 01 minute 30 seconds.

Next, control processing performed by each POS register 100 based on the result of transmission / reception of the power supply state notification will be described with reference to FIG. FIG. 4 is a diagram illustrating a result of each POS register 100 on the LAN transmitting / receiving a power state notification. In the description of FIG. 4, a case where the number of the POS registers 100 is three will be described.
FIG. 4A is a diagram illustrating a result of the POS register 100 transmitting and receiving a power supply state notification. In the example shown in FIG. 4A, the result of transmission / reception of the power state notification for each POS number is shown. The POS number represents an identification number for uniquely identifying the POS register 100.

  The transmission content represents a detection result stored in a power supply state notification transmitted from one POS register 100 to another POS register 100. The value of “detection” in the transmission content item indicates that the POS register 100 has transmitted a power state notification including a detection result indicating that the power supply stop by the main power supply unit 112 has been detected to another POS register 100. “Undetected” in the item of transmission content indicates that the POS register 100 has transmitted to the other POS registers 100 a power state notification including a detection result indicating that the main power supply unit 112 has not detected a power supply stoppage.

  The received content represents a detection result stored in a power supply state notification received by one POS register 100 from another POS register 100. The value of “detection” in the received content item is a power state notification including a detection result indicating that the POS register 100 detects a power supply stoppage from the main power supply unit 112 of the other POS register 100 from the other POS register 100. Indicates that it has been received. That is, when the content of the detection result stored in the received power status notification indicates “detected”, the POS register 100 indicates that another POS register 100 that is the transmission source of the power status notification is in the standby power status. to decide.

  “Undetected” in the item of received content is a power status notification including a detection result indicating that the POS register 100 has not detected a power supply stop by the main power supply unit 112 of the other POS register 100 from the other POS register 100. Is received. That is, in the POS register 100, when the content of the detection result stored in the received power status notification indicates “not detected”, the other POS register 100 that is the transmission source of the power status notification is in the normal power status. Judge.

  For example, in FIG. 4A, a power status notification including a detection result indicating that the POS register 100-1 (POS number “POS1”) detects the stop of power supply by the main power supply unit 112 is sent to another POS register 100 (POS). It is transmitted to the register 100-2 and the POS register 100-3), and the power status notification including the detection results “detection” and “non-detection” is received from each of the other POS registers 100. In such a case, the POS register 100-1 performs a shutdown operation from the standby power supply state. This is because the number of POS registers 100 that detected a power supply stop by the main power supply unit 112 is greater than the number of POS registers 100 that have not detected a power supply stop by the main power supply unit 112. With this configuration, it is possible to reduce the possibility of abnormal termination without performing a shutdown operation.

  4A, the POS register 100-2 (POS number “POS2”) sends a power status notification including a detection result indicating that the main power supply unit 112 has detected the stop of power supply to another POS register 100 (POS). It is transmitted to the register 100-1 and the POS register 100-3), and the power status notification including the detection results “detection” and “non-detection” is received from each of the other POS registers 100. In such a case, the POS register 100-2 performs a shutdown operation from the standby power supply state.

  In FIG. 4A, the POS register 100-3 (POS number “POS3”) sends a power status notification including a detection result indicating that the power supply stop by the main power supply unit 112 is not detected to another POS register 100. (POS register 100-1 and POS register 100-2), and the power status notification including the detection results “detection” and “detection” is received from each of the other POS registers 100. In such a case, since the POS register 100-3 is in a normal power supply state, it does not control its own device. That is, when the own device does not detect the power supply stop by the main power supply unit 112, the POS register 100 does not control the own device regardless of the power state of the other POS registers 100. Note that even if the POS register 100 does not detect the power supply stop by the main power supply unit 112, the other POS register 100 detects the power supply stop by the main power supply unit 112 itself. In such a case, it may be controlled to perform a shutdown operation of the own device.

  FIG. 4B is a diagram illustrating a result of the POS register 100 performing transmission / reception of a power supply state notification. In the example shown in FIG. 4B, the result of transmission / reception of the power state notification for each POS number is shown.

  For example, in FIG. 4B, a power status notification including a detection result indicating that the POS register 100-1 (POS number “POS1”) detects the stop of power supply by the main power supply unit 112 is sent to another POS register 100 (POS). It is transmitted to the register 100-2 and the POS register 100-3), and the power status notification including the detection results “not detected” and “not detected” is received from each of the other POS registers 100. In such a case, the POS register 100-1 performs an operation of switching from the standby power supply state to the normal power supply state. That is, the POS register 100-1 performs an operation of switching the power supply source from the standby power supply unit 114 to the main power supply unit 112. Note that even if the POS register 100 does not detect the power supply stop by the main power supply unit 112, the other POS register 100 detects the power supply stop by the main power supply unit 112 itself. In such a case, it may be controlled to perform a shutdown operation of the own device.

  In FIG. 4B, the POS register 100-2 (POS number “POS2”) sends a power status notification including a detection result indicating that the power supply stop by the main power supply unit 112 is not detected to another POS register 100. It is transmitted to (POS register 100-1 and POS register 100-3), and it is shown that the power status notification including the detection results “detection” and “non-detection” is received from each of the other POS registers 100. In such a case, since the POS register 100-2 is in a normal power supply state, it does not control its own device. Note that even if the POS register 100 does not detect the power supply stop by the main power supply unit 112, the other POS register 100 detects the power supply stop by the main power supply unit 112 itself. In such a case, it may be controlled to perform a shutdown operation of the own device.

  In FIG. 4B, the POS register 100-3 (POS number “POS3”) sends a power status notification including a detection result indicating that the power supply stop by the main power supply unit 112 is not detected to another POS register 100. (POS register 100-1 and POS register 100-2) and a power status notification including detection results “detected” and “not detected” is received from each of the other POS registers 100. In such a case, since the POS register 100-3 is in a normal power supply state, it does not control its own device. Even if the own device has not detected the power supply stop by the main power supply unit 112, if another POS register 100 detects the power supply stop by the main power supply unit 112, You may control to perform a shutdown operation.

FIG. 5 is a flowchart showing the operation of the control process when the power supply is stopped in the present invention.
Step S10: The power supply unit 113 of the POS register 100 detects a voltage abnormality of the main power supply unit 112. Specifically, the power supply unit 113 detects a power supply stop by the main power supply unit 112. Thereafter, the process proceeds to step S12.
Step S12: The power supply unit 113 switches the power supply source from the main power supply unit 112 to the standby power supply unit 114. Thereafter, the process proceeds to step S14.

Step S14: Next, the communication unit 108 transmits to the other POS registers 100 a power supply state notification including the POS number of the own device and a detection result indicating that the main power supply unit 112 has detected the stop of power supply. Thereafter, the process proceeds to step S16.
Step S16: Did the communication unit 108 detect from each of the other POS registers 100 that received the power state notification transmitted in the process of step S16 that the main power supply unit 112 of each of the other POS registers 100 has stopped power supply? A power supply state notification including the detection result and the POS number is received. Thereafter, the process proceeds to step S18.

Step S18: The CPU 101 acquires each value (POS number, detection result) stored in the received power status notification. Next, the CPU 101 refers to the power state information database, and obtains a record corresponding to the POS number of another POS register 100 that is the transmission source of the power state notification. The CPU 101 updates the value of the power state stored in the acquired record by overwriting based on the acquired detection result.

  More specifically, when the acquired detection result is a content (for example, “detection”) indicating that the power supply stop by the main power supply unit 112 is detected, the CPU 101 is the other source of the power supply state notification. It is determined that the POS register 100 is in the standby power supply state. Then, the CPU 101 updates the power state value of the other POS register 100 by overwriting the power state value stored in the acquired record with a value indicating the standby power state (for example, “2”). To do.

  On the other hand, when the acquired detection result is a content (for example, “non-detection”) indicating that the power supply stop by the main power supply unit 112 is not detected, the CPU 101 transmits another POS that is the transmission source of the power state notification. It is determined that the register 100 is in the normal power supply state. Then, the CPU 101 updates the power state value of the other POS register 100 by overwriting the power state value stored in the acquired record with a value indicating the normal power state (for example, “1”). To do.

  If there is another POS register 100 that does not respond within a predetermined time after the transmission of the power state notification, the CPU 101 determines that the other POS register 100 is in a power-off state. Then, the CPU 101 overwrites the value of the power state stored in the record corresponding to the POS number of the other POS register 100 with a value (for example, “0”) indicating the power off state. The value of the power state of the POS register 100 is updated. When the POS register 100 updates the power state of all other POS registers 100 on the LAN, the process proceeds to step S20.

Step S20: The CPU 101 refers to the power supply state information database and determines whether there is another POS register 100 that detects the stop of the power supply by the main power supply unit 112. More specifically, the CPU 101 refers to the power supply state information database and determines whether there is a value whose power supply state value is other than “1”. That is, whether or not there is another POS register 100 having a value indicating the power off state (for example, “0”) or a value indicating the standby power state (for example, “2”). judge. If there is another POS register 100 that detects the stop of power supply, the process proceeds to step S22. If there is no other POS register 100 that has detected the stop of power supply, the process proceeds to step S26.

Step S22: The CPU 101 determines whether or not the number of the POS registers 100 that have detected the power supply stop by the main power supply unit 112 is greater than the number of the POS registers 100 that have not detected the power supply stop by the main power supply unit 112. Specifically, the CPU 101 acquires a power state value for each POS number recorded in the power state information database. Next, the CPU 101 compares the number of acquired power state values “1” with the combined number of acquired power state values “0” and “2”.

  When the total number of power supply state values “0” and “2” is greater than the number of power supply state values “1”, the CPU 101 determines that the number of the POS registers 100 that detected the stop of power supply by the main power supply unit 112 is the main power supply. It is determined that there are more than the number of POS registers 100 in which the power supply stoppage by the unit 112 is not detected. If the number of POS registers 100 that detected the stop of power supply by the main power supply unit 112 is greater than the number of POS registers 100 that did not detect the stop of power supply by the main power supply unit 112, the process proceeds to step S24. If the number of POS registers 100 that detected the stop of power supply by the main power supply unit 112 is not greater than the number of POS registers 100 that did not detect the stop of power supply by the main power supply unit 112, the process proceeds to step S26.

Step S24: The CPU 101 performs a shutdown operation of its own device (POS register 100). Thereafter, the process ends.
Step S <b> 26: The CPU 101 controls to perform an operation of switching the power supply source from the standby power supply unit 114 to the main power supply unit 112. Thereafter, the process proceeds to step S28.
Step S28: The CPU 101 determines whether or not the power supply source can be switched from the standby power supply unit 114 to the main power supply unit 112. When the switching can be performed, the CPU 101 switches the power supply source to the main power supply unit 112. Thereafter, the process ends. If it has not been switched, the process proceeds to step S24.

  Next, an example of the operation of the POS system according to the present invention will be described with reference to FIGS. Specifically, an example of the operation of a plurality of POS registers 100 related to the control processing when power supply is stopped is shown. In the description of the sequence diagrams shown in FIGS. 6 and 7, the number of POS registers 100 provided in the POS system is three (POS register 100-1, POS register 100-2, and POS register 100-3). Each functional unit included in each POS register 100 is the same. For this reason, the reference numerals of the functional units will be omitted. First, FIG. 6 will be described.

  FIG. 6 is a sequence diagram showing an example of the operation of the POS system according to the present invention. In FIG. 6, the POS register 100-1 and the POS register 100-2 each detect the stop of power supply of the main power supply unit of the own device, and the POS register 100-3 is the main power supply unit of the own device (POS register 100-3). A case where no power supply stoppage is detected (in the case of FIG. 4A) will be described.

Step S30: The POS register 100-1 detects a voltage abnormality of the main power supply unit. Specifically, the POS register 100-1 detects a power supply stop of the main power supply unit.
Step S32: The POS register 100-2 detects a voltage abnormality of the main power supply unit. Specifically, the POS register 100-2 detects the power supply stop of the main power supply unit.

Step S34: Next, the POS register 100-1 switches the power supply source from the main power supply unit to the standby power supply unit.
Step S36: The POS register 100-2 switches the power supply source from the main power supply unit to the standby power supply unit.

Step S38: Next, the POS register 100-1 notifies the POS register 100-2 and the POS register 100-3 of the power status notification including the detection result indicating that the power supply stop of the main power supply unit is detected and the POS number (POS1). Send to.
Step S40: The POS register 100-2 receives the power status notification transmitted from the POS register 100-1. The POS register 100-2 acquires each value of the detection result and the POS number (POS1) stored in the received power supply state notification. The POS register 100-2 refers to the power state information database and acquires a record corresponding to the acquired POS number (POS1). Thereafter, the POS register 100-2 updates the value of the power supply state recorded in the acquired record by overwriting based on the acquired detection result. More specifically, the POS register 100-2 determines that the POS register 100-1 is in the standby power supply state because the acquired detection result indicates that the power supply stop of the main power supply unit has been detected. . The POS register 100-2 overwrites the value of the power supply state stored in the acquired record with a value (for example, “2”) indicating the standby power supply state, thereby changing the value of the power supply state of the POS register 100-1. Update. At this time, the POS register 100-2 records the time when the power supply state is updated as the last update time.

Step S42: The POS register 100-3 receives the power status notification transmitted from the POS register 100-1. The POS register 100-3 acquires each value of the detection result and the POS number (POS1) stored in the received power supply state notification. The POS register 100-3 refers to the power status information database and acquires a record corresponding to the acquired POS number (POS1). Thereafter, the POS register 100-3 updates the power state value recorded in the acquired record by overwriting it based on the acquired detection result. More specifically, the POS register 100-3 determines that the POS register 100-1 is in the standby power supply state because the acquired detection result indicates that the power supply stop of the main power supply unit has been detected. . The POS register 100-3 overwrites the value of the power supply state stored in the acquired record with a value (for example, “2”) indicating the standby power supply state, thereby changing the value of the power supply state of the POS register 100-1. Update. At this time, the POS register 100-3 records the time when the power supply state is updated as the last update time.

Step S44: Next, the POS register 100-2 notifies the POS register 100-1 and the POS register 100-3 of the power status notification including the detection result indicating that the power supply stop of the main power supply unit is detected and the POS number (POS2). Send to.
Step S46: The POS register 100-1 receives the power status notification transmitted from the POS register 100-2. The POS register 100-1 acquires each value of the detection result and the POS number (POS2) stored in the received power supply state notification. The POS register 100-1 refers to the power state information database and acquires a record corresponding to the acquired POS number (POS2). Thereafter, the POS register 100-1 updates the power state value recorded in the acquired record by overwriting based on the acquired detection result. More specifically, the POS register 100-1 determines that the POS register 100-2 is in the standby power supply state because the acquired detection result indicates that the power supply stop of the main power supply unit has been detected. . The POS register 100-1 overwrites the value of the power supply state stored in the acquired record with a value (for example, “2”) indicating the standby power supply state, thereby changing the value of the power supply state of the POS register 100-2. Update. At this time, the POS register 100-1 records the time when the power supply state is updated as the last update time.

Step S48: The POS register 100-3 receives the power status notification transmitted from the POS register 100-2. The POS register 100-3 acquires each value of the detection result and the POS number (POS2) stored in the received power supply state notification. The POS register 100-3 refers to the power state information database and acquires a record corresponding to the acquired POS number (POS2). Thereafter, the POS register 100-3 updates the power state value recorded in the acquired record by overwriting it based on the acquired detection result. More specifically, the POS register 100-3 determines that the POS register 100-2 is in the standby power supply state because the acquired detection result indicates that the power supply stop of the main power supply unit has been detected. . The POS register 100-3 overwrites the value of the power supply state stored in the acquired record with a value (for example, “2”) indicating the standby power supply state, thereby changing the value of the power supply state of the POS register 100-2. Update. At this time, the POS register 100-3 records the time when the power supply state is updated as the last update time.

Step S50: Next, the POS register 100-3 notifies the POS register 100-1 and the POS register 100-2 of the power status notification including the detection result indicating that the power supply stop of the main power supply unit is detected and the POS number (POS3). Send to. Thereafter, when the POS register 100-3 receives the power status notification from all the other POS registers 100 on the LAN, the POS register 100-3 determines the power status of the own device (POS register 100-3) and the other POS registers. Based on the power state of 100 (POS register 100-1 and POS register 100-2), a predetermined control process is performed. More specifically, since the POS register 100-3 is in the normal power supply state, the POS register 100-1 is in the standby power supply state, and the POS register 100-2 is in the standby power supply state, the normal power supply state. It works as it is. Thereafter, the process ends.

Step S52: The POS register 100-2 receives the power status notification transmitted from the POS register 100-3. The POS register 100-2 acquires each value of the detection result and the POS number (POS3) stored in the received power supply state notification. The POS register 100-2 refers to the power status information database and acquires a record corresponding to the acquired POS number (POS3). Thereafter, the POS register 100-2 updates the value of the power supply state recorded in the acquired record by overwriting based on the acquired detection result. More specifically, the POS register 100-2 indicates that the acquired detection result indicates that the power supply stop of the main power supply unit has not been detected, so that the POS register 100-3 is in the normal power supply state. to decide. The POS register 100-2 overwrites the value of the power supply state stored in the acquired record with a value indicating the normal power supply state (for example, “1”), thereby changing the value of the power supply state of the POS register 100-3. Update. At this time, the POS register 100-2 records the time when the power supply state is updated as the last update time.

Step S54: The POS register 100-1 receives the power status notification transmitted from the POS register 100-3. The POS register 100-1 acquires each value of the detection result and the POS number (POS3) stored in the received power supply state notification. The POS register 100-1 refers to the power state information database and acquires a record corresponding to the acquired POS number (POS3). Thereafter, the POS register 100-1 updates the power state value recorded in the acquired record by overwriting based on the acquired detection result. More specifically, since the POS register 100-1 indicates that the acquired detection result indicates that the power supply stop of the main power supply unit has not been detected, the POS register 100-3 is in the normal power supply state. to decide. The POS register 100-1 overwrites the value of the power supply state stored in the acquired record with a value (for example, “1”) indicating the normal power supply state, thereby changing the value of the power supply state of the POS register 100-3. Update. At this time, the POS register 100-1 records the time when the power supply state is updated as the last update time.

Step S56: When the POS register 100-2 receives the power supply state notification from all the other POS registers 100 (POS register 100-1 and POS register 100-3) on the LAN, the POS register 100-2 receives its own device (POS). A predetermined control process is performed based on the power state of the register 100-2) and the power state of the other POS register 100. More specifically, since the POS register 100-2 is in the standby power supply state, the POS register 100-1 is in the standby power supply state, and the POS register 100-3 is in the normal power supply state, the shutdown operation is performed. Do. Thereafter, the POS register 100-2 ends the process.

Step S58: When the POS register 100-1 receives the power status notification from all the other POS registers 100 (POS register 100-2 and POS register 100-3) on the LAN, the POS register 100-1 recognizes its own device (POS). A predetermined control process is performed based on the power state of the register 100-1) and the power state of the other POS register 100. More specifically, since the POS register 100-1 is in the standby power supply state, the POS register 100-1 is in the standby power supply state, and the POS register 100-3 is in the normal power supply state, the shutdown operation is performed. Do. Thereafter, the POS register 100-1 ends the process.

  FIG. 7 is a sequence diagram showing an example of the operation of the POS system according to the present invention. In FIG. 7, the POS register 100-1 detects the stop of the power supply of the main power supply unit, and the POS register 100-2 and the POS register 100-3 do not detect the stop of the power supply of the main power supply unit (FIG. 7). 4 (B)) will be described.

Step S60: The POS register 100-1 detects a voltage abnormality of the main power supply unit. Specifically, the POS register 100-1 detects a power supply stop of the main power supply unit.
Step S62: Next, the POS register 100-1 switches the power supply source from the main power supply unit to the standby power supply unit.

Step S64: Next, the POS register 100-1 notifies the POS register 100-2 and the POS register 100-3 of the power status notification including the detection result indicating that the power supply stop of the main power supply unit is detected and the POS number (POS1). Send to.
Step S66: The POS register 100-2 receives the power status notification transmitted from the POS register 100-1. The POS register 100-2 acquires each value of the detection result and the POS number (POS1) stored in the received power supply state notification. The POS register 100-2 refers to the power state information database and acquires a record corresponding to the acquired POS number (POS1). Thereafter, the POS register 100-2 updates the value of the power supply state recorded in the acquired record by overwriting based on the acquired detection result. More specifically, the POS register 100-2 determines that the POS register 100-1 is in the standby power supply state because the acquired detection result indicates that the power supply stop of the main power supply unit has been detected. . The POS register 100-2 overwrites the value of the power supply state stored in the acquired record with a value (for example, “2”) indicating the standby power supply state, thereby changing the value of the power supply state of the POS register 100-1. Update. At this time, the POS register 100-2 records the time when the power supply state is updated as the last update time.

Step S68: The POS register 100-3 receives the power status notification transmitted from the POS register 100-1. The POS register 100-3 acquires each value of the detection result and the POS number (POS1) stored in the received power supply state notification. The POS register 100-3 refers to the power status information database and acquires a record corresponding to the acquired POS number (POS1). Thereafter, the POS register 100-3 updates the power state value recorded in the acquired record by overwriting it based on the acquired detection result. More specifically, the POS register 100-3 determines that the POS register 100-1 is in the standby power supply state because the acquired detection result indicates that the power supply stop of the main power supply unit has been detected. . The POS register 100-3 overwrites the value of the power supply state stored in the acquired record with a value (for example, “2”) indicating the standby power supply state, thereby changing the value of the power supply state of the POS register 100-1. Update. At this time, the POS register 100-3 records the time when the power supply state is updated as the last update time.

Step S70: Next, the POS register 100-2 notifies the POS register 100-1 and the POS register 100-3 of the power status notification including the detection result indicating that the power supply stop of the main power supply unit is detected and the POS number (POS2). Send to.
Step S72: The POS register 100-3 receives the power status notification transmitted from the POS register 100-2. The POS register 100-3 acquires each value of the detection result and the POS number (POS2) stored in the received power supply state notification. The POS register 100-3 refers to the power state information database and acquires a record corresponding to the acquired POS number (POS2). Thereafter, the POS register 100-3 updates the power state value recorded in the acquired record by overwriting it based on the acquired detection result. More specifically, since the POS register 100-3 has a content indicating that the acquired detection result does not detect the power supply stop of the main power supply unit, the POS register 100-2 is in the normal power supply state. to decide. The POS register 100-3 overwrites the power state value stored in the acquired record with a value (eg, “1”) indicating the normal power state, thereby changing the power state value of the POS register 100-2. Update. At this time, the POS register 100-3 records the time when the power supply state is updated as the last update time.

Step S74: The POS register 100-1 receives the power status notification transmitted from the POS register 100-2. The POS register 100-1 acquires each value of the detection result and the POS number (POS2) stored in the received power supply state notification. The POS register 100-1 refers to the power state information database and acquires a record corresponding to the acquired POS number (POS2). Thereafter, the POS register 100-1 updates the power state value recorded in the acquired record by overwriting based on the acquired detection result. More specifically, the POS register 100-1 indicates that the acquired detection result indicates that the power supply stop of the main power supply unit has not been detected, so that the POS register 100-2 is in the normal power supply state. to decide. The POS register 100-1 overwrites the value of the power supply state stored in the acquired record with a value (for example, “1”) indicating the normal power supply state, thereby changing the value of the power supply state of the POS register 100-2. Update. At this time, the POS register 100-1 records the time when the power supply state is updated as the last update time.

Step S76: Next, the POS register 100-3 notifies the POS register 100-1 and the POS register 100-2 of the power state notification including the detection result indicating that the power supply stop of the main power supply unit is detected and the POS number (POS3). Send to. Thereafter, when the POS register 100-3 receives the power supply state notification from all the other POS registers 100 (POS register 100-1 and POS register 100-2) on the LAN, the POS register 100-3 detects its own device (POS register). A predetermined control process is performed based on the power state of 100-3) and the power state of the other POS register 100. More specifically, since the POS register 100-3 is in the normal power supply state, the POS register 100-1 is in the standby power supply state, and the POS register 100-2 is in the normal power supply state, the normal power supply state. It works as it is. Thereafter, the process ends.

Step S78: The POS register 100-2 receives the power status notification transmitted from the POS register 100-3. The POS register 100-2 acquires each value of the detection result and the POS number (POS3) stored in the received power supply state notification. The POS register 100-2 refers to the power status information database and acquires a record corresponding to the acquired POS number (POS3). Thereafter, the POS register 100-2 updates the value of the power supply state recorded in the acquired record by overwriting based on the acquired detection result. More specifically, the POS register 100-2 indicates that the acquired detection result indicates that the power supply stop of the main power supply unit has not been detected, so that the POS register 100-3 is in the normal power supply state. to decide. The POS register 100-2 overwrites the value of the power supply state stored in the acquired record with a value indicating the normal power supply state (for example, “1”), thereby changing the value of the power supply state of the POS register 100-3. Update. At this time, the POS register 100-2 records the time when the power supply state is updated as the last update time.

  After that, when the POS register 100-2 receives the power status notification from all the other POS registers 100 (POS register 100-1 and POS register 100-3) on the LAN, the POS register 100-2 determines its own device (POS register). A predetermined control process is performed based on the power state of 100-2) and the power states of the other POS registers 100. More specifically, since the POS register 100-2 is in the normal power supply state, the POS register 100-1 is in the standby power supply state, and the POS register 100-2 is in the normal power supply state, the normal power supply state. It works as it is. Thereafter, the process ends.

Step S80: The POS register 100-1 receives the power status notification transmitted from the POS register 100-3. The POS register 100-1 acquires each value of the detection result and the POS number (POS3) stored in the received power supply state notification. The POS register 100-1 refers to the power state information database and acquires a record corresponding to the acquired POS number (POS3). Thereafter, the POS register 100-1 updates the power state value recorded in the acquired record by overwriting based on the acquired detection result. More specifically, since the POS register 100-1 indicates that the acquired detection result indicates that the power supply stop of the main power supply unit has not been detected, the POS register 100-3 is in the normal power supply state. to decide. The POS register 100-1 overwrites the value of the power supply state stored in the acquired record with a value (for example, “1”) indicating the normal power supply state, thereby changing the value of the power supply state of the POS register 100-3. Update. At this time, the POS register 100-1 records the time when the power supply state is updated as the last update time.

Step S82: When the POS register 100-1 receives the power status notification from all the other POS registers 100 (POS register 100-2 and POS register 100-3) on the LAN, the POS register 100-1 recognizes its own device (POS). A predetermined control process is performed based on the power state of the register 100-1) and the power state of the other POS register 100. More specifically, since the POS register 100-1 is in the standby power supply state, the POS register 100-2 is in the normal power supply state, and the POS register 100-3 is in the normal power supply state, the power supply source Is switched from the standby power supply unit to the main power supply unit.
Step S84: The POS register 100-1 determines whether or not the power supply source has been switched from the standby power supply unit to the main power supply unit. When the power supply source can be switched from the standby power supply unit to the main power supply unit, the POS register 100-1 operates in the normal power supply state. Thereafter, the process ends. On the other hand, if the power supply source cannot be switched from the standby power supply unit to the main power supply unit, the process proceeds to step S86.
Step S84: The POS register 100-1 performs a shutdown operation. Thereafter, the process ends.

  The sequence diagram of FIG. 7 shows a configuration in which each POS register 100 (POS register 100-1, POS register 100-2, and POS register 100-3) acquires the power supply state of all other POS registers 100. However, it need not be limited to this. For example, the POS register 100 (the POS register 100-2 and the POS register 100-3 in FIG. 7) that has not detected the power supply stoppage by the main power supply unit of its own device is the POS register 100 that is the transmission source of the power state notification. Only -1 may be notified of the power state of the own device. Specifically, the following processing may be performed. In the process of step S70 in FIG. 7, the POS register 100-2 transmits the power state notification only to the POS register 100-1 that is the transmission source of the power state notification, and the power state is not transmitted to the POS register 100-3. Do not send notifications. In step S76, the POS register 100-3 transmits a power state notification only to the POS register 100-1 that is a transmission source of the power state notification, and notifies the POS register 100-2 of the power state notification. Do not send.

  When the POS register 100 configured as described above detects the stop of power supply from the main power supply unit 112 of its own device, the switching operation of the power supply source of its own device based on the power state of the other POS register 100 Can be determined whether it is due to a power outage or a false detection. Based on the determination result, the POS register 100 determines whether to perform a shutdown operation or to perform an operation of switching the power supply source from the standby power supply unit 114 to the main power supply unit 112, and executes control processing. Therefore, when the main power supply unit 112 is switched to the power supply of the standby power supply unit 114, the possibility of being shut down can be reduced if it can be used normally. For this reason, it is possible to reduce the influence of erroneous detection.

In the present embodiment, when a certain POS register 100 performs an operation of switching the power supply source from the main power supply unit 112 to the standby power supply unit 114, the POS register 100 includes all other POS registers on the LAN. Based on the power status notification received from each of all the other POS registers 100 that have received the power status notification, the power status notification including the detection result indicating that the power supply stop has been detected is transmitted to 100. In the above description, the operation of switching the own device from the standby power source to the main power source and the operation of performing the operation such as shutting down the own device have been described. However, other modes may be used. For example, when the POS register 100 attempts to transmit a power state notification to the POS register 100 on the LAN after performing an operation of switching the power supply source from the main power supply unit 112 to the standby power supply unit 114, but cannot transmit the power supply status notification. May be controlled to perform operations such as shutting down its own device. Further, for example, the POS register 100 performs an operation of switching the power supply source from the main power supply unit 112 to the standby power supply unit 114 and transmits a power state notification to the other POS register 100 on the LAN, and then from the other POS register 100. Even when the power supply state notification cannot be received, it may be controlled to perform an operation such as shutdown of the own apparatus. Thereby, the effect similar to a present Example can be acquired. That is, even when the network is stopped due to the influence of a power failure or the like, the possibility of abnormal termination can be reduced.
Further, in the present embodiment, the configuration in which each POS register 100 detects the power supply state of all the other POS registers 100 is shown, but the present invention is not limited to this. For example, each POS register 100 performs control processing of its own device by detecting the power supply state only for one other POS register 100 or the POS register 100 adjacent to its own device (POS register 100). Also good.
With this configuration, even when the number of POS registers 100 on the LAN increases (for example, 10 or more), it is not necessary to detect the power supply state of all the other POS registers 100. Therefore, the time required for the POS register 100 to detect the power state of another POS register 100 can be shortened. For this reason, the shutdown operation or the switching of the power supply source can be performed before the power stored in the standby power supply unit 114 is lost.

  In the present embodiment, a specific example of the control processing of the POS register 100 in the POS system is shown. However, the control processing may be executed by a system including an apparatus such as a ticket vending machine.

  A host management device (not shown) (for example, a store controller or a monitoring device) stores a database that records the power state of all POS registers 100 on the LAN, and each POS register 100 is stored in the host management device. By referring to the database, it may perform its own control processing.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

  Each program of the POS register 100 is recorded by recording a program for executing each process of the present invention on a computer-readable recording medium, causing the computer system to read and execute the program recorded on the recording medium. You may perform the various process mentioned above which concerns on a process. Here, the “computer system” may include an OS and hardware such as peripheral devices. Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used. The “computer-readable recording medium” means a flexible disk, a magneto-optical disk, a ROM, a writable nonvolatile memory such as a flash memory, a portable medium such as a CD-ROM, a hard disk built in a computer system, etc. This is a storage device.

  Further, the “computer-readable recording medium” means a volatile memory (for example, DRAM (Dynamic DRAM) in a computer system that becomes a server or a client when a program is transmitted through a network such as the Internet or a communication line such as a telephone line. Random Access Memory)), etc., which hold programs for a certain period of time. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

100 (100-1 to 100-N) ... POS register, 101 ... CPU, 102 ... ROM, 103 ... RAM, 104 ... scanner part, 105 ... display for salesclerk, 106 ... display for customer, 107 ... operation part, DESCRIPTION OF SYMBOLS 108 ... Communication part, 109 ... Buzzer, 110 ... Receipt issue port, 111 ... Printing part, 112 ... Main power supply part, 113 ... Power supply part (power supply means, detection means), 114 ... Standby power supply part

Claims (4)

Detection means for detecting power supply stoppage by the main power supply of the device itself;
A power supply means for performing an operation of switching a power supply source from a main power supply to a standby power supply when the detection means detects the power supply stoppage;
Communication means for transmitting and receiving a notification indicating whether or not the power supply stop has been detected with another device;
Control means for performing predetermined control based on the notification received by the communication means;
With
The control means includes
When the notification that the power supply stoppage is not detected is received from the other device, control is performed so as to perform an operation of switching the power supply source of the own device from the standby power source to the main power source. Product sales processing system. Wherein if the notification of the detection of stopping the power supply from said another device is received, or a notification indicating whether the detecting the power outage from the other apparatus is received If no, the commodity sales processing system according to claim 1, wherein the controller controls to perform the operations of the shutdown of the apparatus. It said control means, commodity sales processing system according to claim 1 or 2 performs the switching operation, and controls to perform the operation of the shutdown if it can not be switched. When the power supply stop is detected and the number of devices that have not detected the power supply stop is greater than the number of devices that have detected the power supply stop including the device, the control means of without operation of the shutdown, according to any one of claims 1 to 3, characterized in that for controlling the power supply of its own device to perform switching operation Order operation to the main power from the standby power supply Product sales processing system.

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