JPH0719307B2 - 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, for example, Japanese Patent Laid-Open No. 52-42341, daily sales information such as total sales amount and total sales amount are classified by department or transaction. In addition to categorizing the total sales amount, etc., store the total sales amount etc. in the random access memory (RAM), print the stored contents of RAM by the settlement operation, and then clear other than specific data such as the total sales amount etc. Is configured.

However, since RAM is electrically free to write and erase data, the stored data may be destroyed by factors such as power failure, failure, static electricity or maintenance and repair, making it difficult to permanently store and save 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, and the incorrect total sales amount etc. may be printed on the settlement report when the use is started. There was a problem that I didn't understand. In addition, some users have requested to memorize at least the daily total sales 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 surely protect stored data. It is intended to provide an electronic cash register capable of checking whether or not the data of the total sales amount of RAM is correct.

(D) Means for Solving Problems The present invention adds the total daily sales amount to the cumulative total sales amount of RAM by a settlement operation, and at the same time, writes it to the non-erasable non-volatile memory, and also performs the RAM by the check operation. And the data in the non-volatile memory are compared with each other, and the comparison result is printed by the printer.

(E) Operation Since the present invention is configured as described above, the non-volatile memory can surely protect the money registration data, and the data stored in the RAM can be easily checked by the print result. I can.

(F) Embodiments Embodiments 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 cash 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, an I / O controller and a memory control. A circuit and the like 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 for the cash registration procedure, memory control, output control, etc. 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). (9) is the CPU (1)
Is a PROM writer that controls the writing or reading of specific data in the nonvolatile memory (FM) (10) under the control of. The non-volatile memory (10) is composed of a well-known programmable read only memory (PROM). PR
OM cannot be erased once the data is written, and its memory can be preserved semipermanently even if it is electrically disconnected.
Drive circuits (11), (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 lock (not shown), and has the modes of "OFF", cash registration "REG", inspection "X", settlement "Z", and setting "P". To be 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), Currency 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 the cumulative total sales amount (GT) is stored. Is configured.

Fig. 4 shows the configuration of the non-volatile memory (10), and one PR
Three OM storage capacity of 65536 bits are used,
It has a total storage capacity of 196,608 bits. In addition, as for the money registration data to be written, 80 bits of data are written for each data, 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 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 the registration operation, it will be divided into product departments, transactions, etc. like ordinary electronic cash registers.
Sales data is registered in the area (6A) of the RAM (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) executes the 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 and printed, the CPU (1) at step (S6) RAM (6)
Add the total sales total amount for the day to the data in area (6D) and calculate the total sales amount (GT) and print it. At the same time, the CPU (1) controls the PROM writer (9) in step (S7) to store the total sales amount data in the latest free space of the cash registration data area of the non-volatile memory (10). When the payment report is printed, the CPU (1)
In step (S8), the registered data in RAM (6) is cleared and the settlement operation ends. In this way, the daily total sales total amount data is sequentially stored in the non-volatile memory (10), so that the data can be surely protected. Now, in the non-volatile memory (10), 2428 data writing areas are secured, and data for several years can be stored.

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 performed at the start of work will be described with reference to the flowcharts 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 of the check report is correct, and then in step (S11), it is determined whether or not the business code of the check report is correct. If 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
In step (1), the process proceeds to step (S13) to check whether the RAM (6) is normal. Check RAM (6) RAM
For example, the data stored in (6) is read and saved by 8 bits at a time, the read area is cleared, the saved data is rewritten, and the written data is read again and compared with the saved data. By
This can be performed by determining that they are normal if they match and abnormal if they do not match. RAM this way
If the RAM (6) is abnormal as a result of the check in (6), the process proceeds to step (S15), and "RAM NG" is displayed as shown in Fig. 8 (b).
"CALL SERVICE" is printed and self-diagnosis ends at that point. On the other hand, when RAM (6) is normal, step (S
After printing "RAM OK" as shown in Fig. 9 (c) in 16), the CPU (1) checks in step (S17) to see if there is any abnormality in the program in ROM (3). ) Machine codes 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, first, in step (S18), the X register (6B) of RAM (6) is cleared to zero, and then the accumulated sales stored in the 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 (6c) of the RAM (6) is cleared to zero, and the data in the non-volatile 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
From 0), the 80-bit data, 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", step (S2
In 4), 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 nonvolatile memory (10) has ended, and in step (S26), the address data for 80 bits is advanced to read the next data from the nonvolatile memory (10), It returns to step (S22) and repeats the same operation. As a result, the cumulative total amount of sales (GT) stored in the non-volatile memory (10) is obtained in the Y register (6c). When the read data is "0", that is, the total sales amount data is not stored when the data is read from the nonvolatile memory (10) in this manner, the step (S23) to the step (S27) are performed. ), The values of the X register (6B) and the Y register (6c) are printed as shown in FIG. 9 (e) or FIG. 10 (e), and in step (S29), the X register (6B) The value of the Y register (6c) is subtracted from the value and the result is printed as shown in FIG. 9 (f) or FIG. 10 (f). In the case of FIG. 10, it indicates that the accumulated total sales amount of the RAM (6) has an error, and the operator can easily recognize the error by this printing. An operator who notices an error notes the error,
It is possible to take measures such as correcting the total sales amount of the RAM (6).

Next, the CPU (1) proceeds to step (S30) to sequentially turn on the display segments of the display unit (7) to perform a display test, and then, at step (S31), sounds a buzzer to perform an alarm test, and also at step (S32). After the drawer release test is performed in step S33, the test pattern data is supplied to the printer (8) in step (S33), the test pattern is printed as shown in FIG.

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 cash registration data in the non-volatile memory, so that the cash registration data is surely protected and stored in the non-volatile memory. It is possible to easily check the correctness of the accumulated total sales amount of RAM by calculating the accumulated total of the accumulated data and comparing it with the accumulated total sales amount stored in RAM. The effect is large.

[Brief description of drawings]

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 non-volatile 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 report. (1) ... CPU, (2) ... keyboard, (3) ... ROM,
(6) ... RAM, (7) ... display, (8) ... printer,
(9) ... PROM writer, (10) ... nonvolatile memory.

Claims (1)

[Claims] 1. An input means for inputting cash registration data and selection of various processing modes, a central processing unit for executing a predetermined calculation or control in response to an input of the input means, and one day worth. RAM for storing cash registration data and cumulative total sales amount data, etc., non-volatile memory for storing total total sales amount data for each day, and predetermined data of the RAM based on control of the central processing unit. When a settlement mode is selected by the input means, the central processing unit is provided with a memory control device for controlling writing or reading in a predetermined area of the non-volatile memory and a printer, and the central processing unit is based on the money registration data in the RAM. The total sales total amount data for one day is calculated, the calculated data is written to the nonvolatile memory and added to the cumulative total sales amount data. When the self-mode is selected by the force means, said central processing unit performs a comparison of the cumulative total sales amount data and the data in the RAM that accumulated sum total sales total amount data for each daily in the non-volatile memory,
An electronic cash register characterized in that the result is printed by a printer.