JPH077474B2 - Electronic cash register - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electronic cash register.

(B) Conventional Technology Generally, in an electronic cash register, as shown in Japanese Patent Laid-Open No. 52-42341, for example, daily sales information is used to display the total sales amount or the total sales amount by department or In addition to sorting by transaction, etc., the cumulative total sales amount etc. are stored in the random access memory (RAM), and after the contents stored in the RAM are printed by the settlement operation, the data other than specific data such as the cumulative total sales amount etc. is cleared. Is configured to.

However, because RAM is electrically free to write and erase data, the stored data may be destroyed due to factors such as power failure, failure, static electricity, or maintenance and repair, making it difficult to permanently store and maintain data in RAM. Met. Therefore, for example, when the power is turned off and not used for a long vacation,
The data such as the total sales amount stored in the RAM may be corrupted due to the voltage drop of the battery that backs up the RAM, etc., and the incorrect total sales amount may be printed on the settlement report when the use is started. There was a problem that I did not understand. In addition, some users have requested to memorize at least the daily sales total individually, and to read and use them at the time of annual tax filing, for example, but RAM does not guarantee data protection. There was a problem.

(C) Problems to be Solved by the Invention The present invention has been made to solve the above problems, and sequentially writes money registration data to a non-erasable non-volatile memory to securely protect stored data. It provides an electronic cash register that can be automatically corrected if the total sales amount of RAM data is incorrect.

(D) Means for Solving Problems The present invention adds the total daily sales amount to the cumulative total sales amount of the RAM by the settlement operation, and at the same time, writes it in the non-erasable non-volatile memory, or the RAM by the check operation. And the data in the non-volatile raw memory are compared, and if there is a difference, the data in the non-volatile raw memory is written to the RAM, and the cumulative total sales amount of the RAM is automatically corrected.

(E) Operation Since the present invention is configured as described above, it is possible to surely protect the cash registration data in the non-volatile memory, and
Even if there is an error in the total sales amount stored in the RAM due to the voltage drop of the battery for the backup of the RAM, the correction is automatically performed based on the data stored in the non-volatile memory.

(F) Example An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a circuit configuration of an electronic cache register of the present invention. (1) is a central processing unit (CPU) which constitutes a control circuit, and includes an arithmetic circuit, an instruction decoder, I / O, A controller, a memory control circuit, etc. are built in, and various arithmetic processing is performed based on each key operation signal of the keyboard (2) to control each unit. (3) CPU via address bus (4) and data bus (5)
Read-only memory (ROM) connected to (1)
Then, based on each key operation signal of the keyboard (2), CP
Instruction programs such as the cash registration procedure, memory control, and output control performed by U (1) are stored in advance. (6) is a RAM connected to the CPU (1) via the address bus (4) and the data bus (5), and the data processed by the CPU (1) is stored in the RAM.
Read by U (1). Reference numeral (7) is a display for displaying data input from the keyboard (2) or data processed by the CPU (1). (8) is a printer that prints on receipts and journal paper CP
Printing is controlled by U (1). Reference numeral (9) is a PROM writer which controls writing or reading of specific data in the nonvolatile memory (10) under the control of the CPU (1).
The non-volatile memory (10) is composed of a well-known programmable read only memory (PROM). PROM cannot be erased once data is written, and its memory can be stored semipermanently even if it is electrically disconnected. (11)
Drive circuits (12) and (13) are connected to the address bus (4) and the data bus (5) and drive the keyboard (2), the display (7) and the printer (8), respectively.

Figure 2 shows the keyboard layout of the keyboard (2).
4) is a mode control lock, which responds to the insertion and rotation of a predetermined key (not shown), "OFF", cash registration "REG",
Each mode of inspection "X", settlement "Z", and setting "P" is selected. The keyboard (2) is provided with a numeric keypad (15) for entering numbers, a department key (16) and a transaction key (17). The transaction key (17) has a total / cash key "CASH" (17).
a), Subtotal key “ST” (17b), Exchange key “# / NS” (17
c), multiplication key "X" (17d), ELR key "ELR" (17
e), the correction key “VOID” (17f), etc. are arranged.

Fig. 3 shows the structure of the RAM (6), which is an area (6A) where the daily sales data is divided into product departments, transactions, etc.
And an X register (6B) and a Y register (6C) to which data is transferred, and an area (6D) in which a cumulative total sales amount (GT) is stored. Except for the area (6D) by touch operation, It is configured to be cleared.

Fig. 4 shows the configuration of the non-volatile memory (10), and one PR
Three OM storage capacities of 65536 bits are used,
It has a total storage capacity of 196.608 bits. As for the money registration data to be written, 80 bits of data are written per information, 2428 pieces, that is, 194.240 bits are allocated as a storage area for the money registration data, and the remaining area is an area for storing the classification designation data and the like. Is assigned as.

Next, the operation of the present invention having such a configuration will be described based on a flowchart.

First, set the mode control lock (14) at the position of cash registration "REG", and if you perform registration operation, it will be classified according to product gate, transaction etc. as in a normal electronic cash register.
Sales data is registered in the area (6A) of M (6). Therefore, when the registration work for one day is completed, the mode control lock (14) is set to the position of the adjustment "Z", and the adjustment operation is performed, the CPU (1) causes step (S) as shown in FIG.
In 1), the data stored in the area (6A) of the RAM (6) is sequentially read out and supplied to the printer (8) to print a settlement report. At this time, when the total sales amount of the day is read out and printed, the CPU (1) is RAM (6) in step (S6)
Add the total sales amount on the day to the data in the area, and obtain the total sales amount (GT) and print it. Also at the same time CP
The U (1) controls the PROM writer (9) in step (S7) to store the total sales amount data in the latest free area of the cash registration data area of the non-volatile memory (10). Then, at the end of printing the settlement report, the CPU (1) proceeds to step (S
In 8), clear the registered data in RAM (6) and finish the settlement operation. In this way, the daily total sales total amount data is
Since the data is sequentially stored in the non-volatile memory (10), the data can be surely protected. Now non-volatile memory (10)
In this system, 2428 data writing areas are secured, and it is possible to store data for several years.

If the yearly data is also stored together with the total sales amount, the CPU (1) stores the same year from the non-volatile memory (10) by operating the predetermined read key on the keyboard (2) and inputting yearly data. It is possible to read out the total sales amount data of and print out for each year by the printer (8).

Next, the self-diagnosis operation of the electronic cash register at the start of work will be described with reference to the flow charts of FIGS. 6 and 7.

First, set the mode control lock (14) to the position of settlement "Z", enter the business code number "77" in the check report, and then operate the ST key (17b) and then the CASH key (17a). . CPU that detected the CASH key (17a) signal (1)
In step (S10), it is determined whether or not the operation mode is the check mode, and then in step (S11), it is determined whether or not the business code of the check report is correct. When the business code of the check report is correct, proceed to step (S12) to supply the date, time or report name data to the printer (8),
Printing is performed as shown in FIG. Then CPU
(1) advances to step (S13) to check whether the RAM (6) is normal or not. RAM (6) RAM as a check
After the data stored in (6) is read and saved, for example, every 8 bits, the read area is cleared, the saved data is rewritten, and the written data is read again and compared with the saved data. By
If they match, it is normal, and if they do not match, it can be judged as abnormal. RAM this way
If the result of the check in (6) is normal, step (S16)
"RAM OK" is printed as shown in Fig. 9 (C), and if it is abnormal, at step (S15) it is printed as "RAM OK" as shown in Fig. 8 (B).
[NG] Print "CALL SERVICE" and terminate self-diagnosis at that point. RAM (6) check is over, RAM
If (6) is normal, then the CPU (1) determines whether or not the program in the ROM (3) is abnormal by performing a step (S17) to ROM.
The machine codes of (3) are sequentially added, and the result is printed as shown in FIG. If this value is different from the usual value, it can be seen that the program in ROM (3) is abnormal.

Next, the cumulative total sales amount (G
In order to check whether T) is correct or not, first, in step (S18), the X register (6B) of RAM (6) is cleared to zero, and then the cumulative sales stored in area (6D) of RAM (6). Read the total amount data (GT) and read the X register (6
Transfer to B). Then, in step (S20), the Y register (6G) of the RAM (6) is cleared to zero and the data in the nonvolatile memory (10) is read out in step (S2).
In 1), set the address of the non-volatile memory (10) to "0000H". Next, in step (S22), the nonvolatile memory (1
Data of 80 bits from 0), that is, the total sales amount data for one day is read, and it is determined in step (S23) whether the data is "0". If it is not "0", the step (S2
In 3), the read data is added to the Y register (6C) of the RAM (6). Then, in step (S25), it is determined whether or not the non-volatile memory (10) has ended, and in step (S26), the next data is read from the non-volatile memory (10). , And returns to step (S22) to repeat the same operation. As a result, the cumulative total amount of sales stored in the non-volatile memory (10) can be found in the Y register (6C). If the read data is "0", that is, the total sales amount data is not stored, while reading the data from the nonvolatile memory (10) in this manner, the step (S27) is followed by the step (S27). ), The value of the Y register (6C) is subtracted from the value of the X register (6B), and in step (S28), it is determined whether or not the subtraction result is "0", and "0", that is, the RAM (6).
If the total amount of sales (GT) stored in is in agreement with the data stored in the non-volatile memory (10), apply "RAM GT OK" as shown in Fig. 9 (e). To do.

However, if the subtraction result is not "0", the CPU
Step (1) proceeds to step (S30) and RAM (6) area (6D)
The value of the Y register (6C), that is, the total value of the data in the non-volatile memory (10), is written in and the cumulative total sales amount stored in the area (6D) of the RAM (6) is corrected. Then, at steps (S31) to (S33), as shown in Fig. 10 (f) and (g), the "RAM GT NG" message and the X and Y registers (6
C) Print the contents of (6D).

Next, the CPU (1) proceeds to step (S34) and sequentially turns on the display segments of the display (7) to perform a display test, and then at step (S35) sounds a buzzer to perform an alarm test, and also at step (S36). After performing the drawer release test with, the test pattern data is supplied to the printer (8) in step (S37), and the test pattern is printed as shown in FIG. 9 and FIG. finish. This self-diagnosis can be performed at any time, but it is preferable to perform it before starting the registration work.

(G) Effect of the Invention As described above, the electronic cash register of the present invention is configured to store the money registration data in the non-volatile memory, so that the money registration data is surely protected and the non-volatile memory is protected. Calculate the cumulative total of the stored data Compare with the cumulative total sales amount stored in RAM,
If there is a difference, the cumulative total sales amount calculated from the data in the non-volatile memory is written to the RAM, and the total sales total amount in the RAM is configured to be automatically corrected, so that the correct total sales amount can be printed on the settlement report. Done.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the electronic cash register of the present invention, FIG. 2 is a plan view showing the arrangement of the keyboard of FIG. 1, and FIG. 3 is a schematic diagram showing the configuration of the RAM of FIG. ,
FIG. 4 is a schematic diagram showing the configuration of the nonvolatile memory, FIG. 5, FIG. 6, and FIG. 7 are flow charts showing the operating state of FIG. 1, FIG. 8, FIG. 9, and FIG. It is a figure which shows the printing state of a check report. (1) …… CPU, (2) …… keyboard, (3) …… RO
M, (6) ... RAM, (7) ... display, (8) ... printer, (9) ... PROM writer, (10) ... nonvolatile memory.

Claims (1)

[Claims] 1. An input means for inputting money registration data and selecting a processing mode such as a payment mode and a self-diagnosis mode, money registration data for one day, and total money registration data for each day. RAM for storing total sales total amount data for one day and total sales total amount data obtained by accumulating the total sales total amount data, and a non-volatile memory for storing a plurality of total sales total amount data for each day, The calculation means, the comparison means, and the means for controlling the respective parts in response to the input of the input means are provided, and when the payment mode is selected by the input means, the control means causes the total sales in the RAM to be The total amount of money data is written in the non-volatile raw memory and the RAM is calculated by the calculating means.
Cumulative total sales amount in
When the cash registration data for one day and the total sales total amount data in the RAM are cleared and the self-diagnosis mode is selected by the input means, the control means causes the total sales for each day in the non-volatile memory to be changed. When all the total amount data are read and the calculation means is controlled to obtain the cumulative addition data, and the cumulative addition data is compared with the cumulative total sales amount data in the RAM by the comparison means, and the two data are different from each other. The electronic cash register is characterized in that the accumulated sales total amount data of the RAM is immediately rewritten to the accumulated addition data.