JP2889038B2 - POS system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a point-of-sale (POS) system having a power failure processing function.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional P having a power failure processing function.
FIG. 2 is a configuration diagram of an OS system.

In the conventional system shown in FIG.
U10 performs data processing such as arithmetic processing, and the CPU
A memory 11 provided on the same substrate 12 as that of 10 holds programs and intermediate data during processing. The hard disk (HDD) 13 is a hard disk controller 1
4, individual data such as sales data of products and prices of each product are stored.

A communication device 15 is for transmitting and receiving data to and from an external host or the like, and is used by connecting a signal line 16.
The barcode reader 17 reads a barcode for managing products individually, and inputs data through the barcode reader controller 18. Normally, sales data is input using a barcode reader 17 or a key, and the data is processed and recorded in a file on the hard disk 13. The communication device 15 transmits data to the outside or receives information for updating the product data from the outside as necessary.

Power is normally supplied to these devices of the POS system from a power supply device 20 via a common power supply line 19. When a power failure occurs, the power failure detection signal line 2
Switching to the emergency power supply device 22 side is performed by the power supply switching device 24 in response to the signal from the power supply 1, and emergency power from the battery power supply 24 is supplied to the system for a certain period of time. As a result, the system can be operated for a certain period of time after the occurrence of the power failure, and the system can be stopped.

FIG. 6 is a diagram showing an operation state when a power failure occurs in the conventional POS system shown in FIG. Each device is simultaneously switched to the emergency power supply battery 22 at the same time as the occurrence of a power failure by the power supply switching device 23 and continues to operate.
The emergency power supply is turned off when the power failure processing is completed.

[0007]

However, in the conventional system, the CPU (Central Processing Unit) 10 and the memory 1
The basic components such as 1 and the components such as the control device of each peripheral device are not independent from each other in terms of power supply. Therefore, it is necessary to supply emergency power to all components when a power failure occurs. Therefore, the required power for the battery 24, which is an emergency power supply, is extremely large, and the battery is required to be large, and the weight and volume of the device itself are increased, resulting in high cost. Also,
With batteries of the same capacity, there is an inconvenience that the operation continuation time in an emergency becomes shorter as the number of peripheral devices increases.

Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a POS system capable of reducing the capacity of an emergency power supply that operates when a power supply abnormality occurs.

[0009]

According to the present invention, a plurality of objects are provided.
A POS system that has an expansion slot and can continuously supply power from an emergency power supply for a predetermined time when a power failure occurs. The POS system is provided for each expansion slot and supplies power to a plurality of peripheral devices in the system. A plurality of switch means for separately shutting down and control information for each expansion slot
A POS system is provided which has a control means for storing the information and stopping the power supply from the emergency power supply by operating a specific switch means when a power supply abnormality occurs.

That is, a control device for a peripheral device is formed on a substrate separate from a substrate of a main unit including a CPU and a memory, and these control device substrates are mounted on a bus which is a set of common signal lines and power supply lines. In a POS system configured to be connected via a slot and capable of continuously supplying power from an emergency power source such as a battery for a certain period of time when a power failure occurs, the supply of emergency power to each slot is performed in a hardware / software manner. each according to the control to abnormal power supply to the unnecessary control device substrate in the event a switch means to allow stop selectively power supply Rutotomoni, stored control information
Supply power for appropriate time to perform power failure processing for each slot
It is configured as follows.

[0011]

[Action] During a power outage of a power failure or the like, a specific switch means hardware / software controlled to shut off the power supply, each
The power supply to peripheral devices that do not need power supply is stopped by the switch means provided for each slot, so that the power to be supplied from the emergency power supply can be reduced.
In addition, a power failure occurs for each slot according to the stored control information.
Power can be supplied for an appropriate time to perform the processing.

[0012]

Embodiments of the present invention will be described below in detail.

FIG. 1 is a block diagram of an expansion slot type POS system having a power failure processing function according to an embodiment of the present invention.

In FIG. 1, reference numeral 30 denotes a CPU for performing data processing such as arithmetic processing, and reference numeral 31 denotes a memory for holding programs and intermediate data during processing. These CPU3
0 and the memory 31 are basic components of the computer, and are provided on the same substrate 32 called a main board.

The main board 32 is connected to a peripheral device or its control device constituting an independent board via a bus 35 which is a set of a signal line 33 and a power supply line 34, and further via an expansion slot which will be described later. Have been. These peripheral devices and control devices include a communication device 36 for transmitting data to the outside and receiving information for updating product data from the outside, a barcode for reading a barcode for managing products individually. The reader 37 and its barcode reader control device 38, a hard disk (HDD) 39 in which individual data such as sales data of a product and the price of each product are stored, and a hard disk control device 40 for controlling the same are listed.

As described above, the peripheral device or its control device constitutes an independent board, and the expansion slots SLT1, SLT2, SLT provided in the bus 35 respectively.
3, ... are connected. In the middle of the branch line of the power supply line 34 for supplying power to these expansion slots SLT1, SLT2, SLT3,.
1, SW2, SW3,... Are provided.

Normally, power is supplied to these devices of the POS system from a power supply device 41 via a power supply line 35. When a power failure occurs, switching to the emergency power supply device 43 is performed by the power switching device 44 in response to a signal from the power failure detection signal line 42, and the battery power supply 4
Emergency power from 5 is supplied to the system for a period of time. As a result, the system can be operated for a certain period of time after the occurrence of the power failure, and the system can be stopped.

FIG. 2 is a conceptual diagram of the switch unit in the embodiment of FIG.

In the figure, Vcc is a power supply on the power supply side, R is a load resistance assuming a load on the expansion board side, and Tr is a transistor switch capable of selectively cutting off the power supply to the load R. is there. The switch Tr is turned on when a voltage is applied to the base B and a current flows between the base B and the emitter E to supply power to the expansion board. The output side of an OR gate 46 is connected to the base B of the switch Tr. The input side of the OR gate 46 has a hardware switch HSW, a flip-flop 47 holding a bit value that can be set by software, and a power failure occurrence. The output side of the inverter 48 for inverting the signal of the power failure detection signal line 42 is connected. Therefore, the switch Tr is controlled by the hardware switch HSW, the software for controlling the flip-flop 47, and the occurrence of a power failure.

That is, a power failure occurs and the power failure detection signal line 42
Is set to "H", the hardware SW is opened to supply "L" level, and only when the output of the flip-flop 47 is set to "L" level by software setting The switch Tr is turned off to cut off the power supply to the extension board. Set value A by hardware SW, set value B by software, power failure detection signal line 42
Is C, the output D of the OR gate 46 is D =
A + B + invC. However, invC represents the inversion of C.

FIG. 3 is a flowchart for explaining the system setting and operation of this embodiment, and FIG. 4 is a diagram showing the operation status of each unit before and after the occurrence of a power failure.

The operation of this embodiment will be described below with reference to these figures.

When mounting the expansion board in the slot, FIG.
As shown in step S1, whether or not emergency power is to be supplied when a power failure occurs is set for each expansion board. This setting is performed by a hardware switch HSW.

During system operation, when the system is started (step S2), initialization is performed in step S3, and software setting is performed for each expansion board. That is, the switch units SW1, SW2, SW3,...
By setting bit information to the flip-flop 47, it is set whether or not power should be supplied when a power failure occurs.

Next, normal processing is executed (step S4).

When a power failure occurs, the volatile memory 3
1 needs to be written to a file on a disk 39 which is a non-volatile storage medium, and the file needs to be closed. Therefore, switching is performed by the power supply switching device 44 and the battery power supply 45 on the side of the emergency power supply device 43 is switched.
Supplies emergency power to the system for a period of time. However, in the system according to the present embodiment, the switch unit SW2 is turned off by the hardware switch HSW or the setting of the bit information by software immediately after the power failure occurs,
The power supply to the expansion slot SLT2 that does not require emergency power supply is cut off (step S5). This is because normal processing such as sales input needs to be stopped when a power failure occurs, and input / output devices used in normal processing such as the barcode reader 37 do not need to operate (see FIG. 4).

Then, an emergency power supply is supplied only to the CPU 30, the memory 31, the communication device 36, and the hard disk control device 40 to execute the power outage process a (step S6).

After an elapse of an arbitrary time, the switch SW1 is turned off by setting the bit information by software, and thereafter, the emergency power supply to the expansion slot SLT1 which does not require the power supply is cut off (step S7).
That is, in the communication, a normal communication procedure (protocol) is defined, and the other party performs processing in accordance with the procedure when the communication is interrupted. Therefore, the emergency power supply to the communication device 36 is stopped at an arbitrary timing after the power failure. (Fig. 4
reference).

As a result, the emergency power is supplied only to the CPU 30, the memory 31, and the hard disk controller 40, and the power failure process b is executed (step S8).

In the above example, the power failure process is divided into processes a and b in order to show that the emergency power supply to each expansion slot can be cut off by a program during the power failure process. When the power failure process is completed, the power switching device 44
Disconnects the emergency power supply 43 (step S
9) Stop the system.

As shown in FIG. 4, the CPU 30 and the memory 3
1. The hard disk control device 40 operates during the period from the occurrence of a power failure to the power failure processing time to the emergency power off.

As described above, according to the present embodiment, the emergency power to be supplied during the power failure process of the system after the power failure occurs is replaced by the hardware / power supply to peripheral devices unnecessary for this process. Since the configuration is such that the operation is stopped by the setting timing of the software SW, it is possible to reduce the supply power of the battery, which is an emergency power supply, to reduce the size of the battery and to reduce the weight and volume of the entire system.

[0033]

According to the present invention as described above, according to the present invention, multiple
A POS system having a number of expansion slots and capable of continuously supplying power from an emergency power supply for a predetermined time when a power failure occurs is provided for each expansion slot , and supplies power to a plurality of peripheral devices in the system. A plurality of switch means for separately shutting down and control information for each expansion slot
And control means for stopping a power supply from the emergency power supply by operating a specific switch means when a power supply abnormality occurs, so that peripheral devices connected to each expansion slot are provided.
Setting whether to supply emergency power, depending on the location, and
Power supply can be set to supply power for an appropriate period of time during power outage processing.
Yes, the capacity of the emergency power supply that operates when a power supply abnormality occurs can be reduced. As a result, the battery can be reduced in size and the weight and volume of the entire system can be reduced.

[Brief description of the drawings]

FIG. 1 shows an expansion slot type PO according to an embodiment of the present invention.
It is a block diagram of an S system.

FIG. 2 is a conceptual diagram of a switch unit in the embodiment of FIG.

FIG. 3 is a flowchart for explaining system setting and operation of the embodiment of FIG. 1;

FIG. 4 is a diagram illustrating operation states of respective units before and after a power failure occurs.

FIG. 5 is a configuration diagram of a conventional POS system.

FIG. 6 is a diagram showing an operation state when a power failure occurs in a conventional POS system.

[Explanation of symbols]

 Reference Signs List 30 CPU 31 Memory 32 Main board 33 Signal line 34 Power supply line 35 Bus 36 Communication device 37 Barcode reader 38 Barcode reader control device 39 HDD 40 Hard disk control device 41 Power supply device 42 Power failure detection signal line 43 Emergency power supply device 44 Power supply switching device 45 Battery SLT1, SLT2, SLT3 Expansion slot SW1, SW2, SW3 Switch section

Claims (1)

(57) [Claims] 1. A POS system having a plurality of expansion slots and capable of continuously supplying power from an emergency power supply for a predetermined time in the event of a power failure , provided for each of the expansion slots.
A plurality of switching means for a plurality of power supply to the peripheral device separately cut off each in which and system, before
A POS system storing control information for each of the expansion slots, and activating specific switch means to stop power supply from the emergency power supply when a power failure occurs.