JPH071514B2 - 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 configured to register cash registration information related to product sales in a non-volatile memory.

(B) Conventional technology Conventionally, in an electronic cash register, as shown in, for example, JP-A-52-42341, the total sales amount and total sales amount are classified by department as daily product sales information. Alternatively, it is configured such that it is sorted into transactions and stored in the memory, the stored contents of the memory are printed by a settlement operation, and then the memory is cleared. Random access memory (RAM) is generally used as the memory for this purpose, but because RAM can be electrically programmed and erased freely, power failure, failure, static electricity, maintenance or repair etc. The stored data may be destroyed due to
It was difficult to permanently store and store data in M.

On the other hand, some users have requested to memorize at least the daily sales total individually, and read them out at the time of annual tax filing, for example, but RAM does not guarantee data protection. There was a problem.

Therefore, the applicant of the present application has filed an application for an electronic cash register which can securely protect stored data by sequentially writing money registration information to a non-erasable non-volatile memory in JP-A-60-247484. When data is written to the memory, an instantaneous power failure occurs, and if the data is written with the write voltage to the non-volatile memory lowered, the data will change over time and become erroneous. When reading the stored total sales amount and requesting the cumulative sales amount and issuing a report, there is a problem that wrong data is printed and an incorrect report is issued.

(C) Problems to be Solved by the Invention The present invention has been made to solve the above problems, and an electronic device configured to check whether data has an error and notify an operator if there is an error. An expression cache register is provided.

(D) Means for Solving Problems According to the present invention, when the data stored in the non-volatile memory is read and a report is output, the data is checked for errors, and if there is an error, the correct data until immediately before the error is read. Is output and the operator is informed that there is an error.

(E) Operation Since the present invention is configured as described above, if there is an error in the data stored in the non-volatile memory, the operator can know it early and can take measures such as repair. It is possible to prevent incorrect reports from being issued.

(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 and an I / O 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). (9) is the CPU (1)
Is a PROM writer that controls the writing or reading of specific data in the nonvolatile memory (10) under the control of. 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. (1
Drive circuits 1), 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.
The X register (6B) and the Y register (6C) to which the data is transferred, the area (6D) where the total sales amount (GT) is stored, and the data processed by the CPU (1) are stored. Area (6E) to (6I), etc., and the area (6
Except for D), 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 bits, that is, 194240 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 flow chart.

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 divisions, 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) 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 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 (S8) to store the total sales amount data in the latest free area of the cash registration data area of the non-volatile memory (10). At this time, the CPU (1) performs a predetermined parity calculation from the total sales total amount data in step (S7) and writes the calculation result together with the total sales total amount data into the non-volatile memory (10). When the payment report is printed, the CPU
In step (1), the registered data in the RAM (6) is cleared in step (S9), and the settlement operation is completed. 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 operation of reading the data stored in the non-volatile memory (10), obtaining the cumulative total amount of sales until then, and issuing a report will be described.

First, the mode control lock (14) is set to the position of the preset "P", and the VOID key (17f) is operated. The CPU (1) that detected the VOID key (17f) signal is connected to the step (S10)
To determine whether it is in preset mode or not, follow the steps (S1
In step 1), set the search start address "0000" in the address counter area (6E) provided in the RAM (6), and set the step (S1
The data is read from the non-volatile memory (10) in 2) and then the address of the non-volatile memory (10) is sequentially specified while the value of the address counter area (6E) is incremented by 1 in step (S14), and the data is stored. Whether or not it is step (S12)
By sequentially checking in ~ (S14), if an address where no data is stored is found, step (S15)
Then, the address data obtained by subtracting -1 from the address is obtained as the address data in which the final data is stored. Then, in step (S16), this value is transferred to the address counter area (6E) and final address data storage area (6F) of the RAM (6).
Write to. This causes the CPU (1) to next step (S17)
Then, the non-volatile memory (10) is addressed based on the address data set in the address counter area (6E), and the total sales amount data for one day stored in the non-volatile memory (10) is displayed. Read, RAM (1
After writing to the X register area (6B) of 0), the step (S
A predetermined parity calculation is performed based on the data written in the area (6B) in 18) and the calculation result is written in the parity data area (6H) of the RAM (6). Then, the CPU (1) reads the parity value that was written at the time of writing the data from the area of the non-volatile memory (10) in which the total sales amount data was stored in the step (S19), and the step (S20)
Then, this value is compared with the parity value calculated in step (S18). If the total sales amount data read from the non-volatile memory (10) is the same as at the time of writing and has not changed, the parity value will be the same, but if even one bit of the total sales amount data of 80 bits has changed, the parity value will change. Since the values are different, this allows the nonvolatile memory (1
It is possible to check whether the data in 0) is incorrect. In this way, when the data is checked and there is no error, the steps (S20) to (S24)
But if an error is detected, step (S21)
Then, it is determined whether the value of the address counter area (6E) of the RAM (6) is "0000". As a result, when the value of the address counter area (6E) is "0000", that is, when the first data has an error, the process proceeds to step (S26) and FIG.
After printing the date, time, and report name as shown in, print the serviceman call in step (S27) as shown in (b), and in the code data area (6I) of RAM (6). After writing the predetermined code, issue a report and end. When a predetermined code is written, the CPU (1) detects this code and sets it to the inactive state before operating thereafter.

However, the value in the address counter area (6E) is "000.
If it is not "0", the CPU (1) proceeds to step (S22) and stores the data of the address counter area (6E) at that time in the RAM.
After writing to the error address data area (6G) in (6),
The error flag is set in step (S23) and then step (S
Proceed to 24). In step (S24), it is detected whether or not the value of the address counter area (6E) is "0000", that is, whether or not the search is completed. If it is not completed, the CPU
(1) is the step (S25) in the address counter area (6
After setting the value of E) to a value down by 80 bits, return to step (S17) and read the total sales amount data from the non-volatile memory (10) based on the newly set address data, and perform the same data as above. Check for the mistake of. At this time, if the check is performed from the latest data to the old data and there are errors in multiple data,
In the error address data area (6G), the address data of the oldest data is stored.

In this way, all the data stored in the non-volatile memory (10) is read, and the address counter area (6E) is read.
When the value of becomes "0000", the CPU (1) goes to step (S24)
To step (S30), the date, time, and report are printed as shown in FIG. 8 (a), and then, at step (S31), the final data stored in the area (6F) of the RAM (6) is stored. The address data is read, converted into the number of data items by a predetermined calculation, and the integrated section is printed as shown in (b). Next, the CPU (1) determines in step (S32) whether or not the error flag is set. If the data in the non-volatile memory (10) has no error and the flag is not set, Go to step (S35), but if there is an error in the data and the flag is set,
The data is read from the error address data area (6G) of the RAM (6), the number of the error data is printed as shown in FIG. 9 (C), and then the step (S34)
After printing the serviceman call as in (d), proceed to step (S35). CP at step (S35)
After clearing the areas (6B) and (6C) of RAM (6), U (1) sets "0000" in the address counter area (6E) in step (S36) and the address counter area in step (S37). Based on the address data of (6E), read the total sales amount data from the non-volatile memory (10)
After transferring to the X register area (6B) in (6), the value in the Y register area (6C) is added in step (S39), and the addition result is written in the area (6C) again. This gives the area (6
The cumulative sales amount data in which the total sales amount is added is stored in C). When the cumulative sales amount is obtained, the CPU (1) proceeds to the next step (S40) and reads out the accumulated sales amount data obtained from the area (6C) as shown in FIG. 8 (c) or FIG. 9 (e). Print. Then step (S41)
Check whether or not the error flag has been set with, and if not set, proceed to step (S42) R
The final address data stored in the area (6F) of AM (6) is compared with the data of the address counter area (6E) to check whether or not all the data has been read. If the reading is not completed, the address data in the address counter area (6E) is set to 80 in order to read the next data in the next step (S43).
The data advanced by the bit is set, the process returns to step (S37), the data is read from the non-volatile memory (10) in the same manner as described above, the cumulative total sales amount is calculated, and the printing is sequentially performed. In this way, reading from the non-volatile memory (10) proceeds,
When the address data in the address counter area (6E) matches the final address data stored in the area (6F) and the reading is completed, the steps (S42) to (S42)
Proceed to 46) and issue a report to finish. As a result of this
Stored in non-volatile memory (10) as shown
A report is printed with the cumulative total sales amount of all 321 data.

On the other hand, if there is an error in the data in the non-volatile memory (10), proceed from step (S41) to step (S44)
The value determined by subtracting -1 from the address data stored in the error address data area (6G) of (6) and the data of the address counter area (6E) are judged to be coincident. If they do not coincide, the process proceeds to step (S43). The same steps are repeated to read the data from the non-volatile memory (10) and sequentially print the cumulative total sales amount. And 1 of the address data stored in the error address data area (6G)
When printing is performed up to the previous address, a match is determined in step (S44) and the process proceeds to step (S45) and RAM
After writing a predetermined code in the code data area (6I) of (6), a report is issued in step (S46), and the process ends. As a result, as shown in FIG. 9, since an error has occurred in the 108th case, the cumulative total sales amount up to 107 cases is printed and a report is issued.

In the above-described embodiment, the data immediately before the 108th case, that is, up to the 107th case, in which an error has occurred in the data, is cumulatively added and printed. Since it is not known that the data is erroneous, the data having an error is marked with, for example, "*" as shown in FIG. 10 to indicate that it is an error, and cumulative addition is not performed after the error occurs. By printing the total sales amount data read from the non-volatile memory (10), it is possible to confirm the entire data. In this way, it is detected that there is an error in the data, and if a predetermined code is written in the area (6I) of the RAM (6), it will become inoperable thereafter, so call a serviceman and perform processing for repair. To

(G) Effect of the Invention As described above, the electronic cash register of the present invention does not normally write data when the total sales amount data is written to the non-volatile memory and the data is not written normally due to a decrease in write voltage. Even if the value changes, when reading the data stored in the non-volatile memory and outputting the report, if the data is checked for correctness and an error is found in the data, the data in the correct range is printed out and the operator is notified of the error. Since it is configured to notify that there is, it is possible to check the error of the data early and measure the repair,
At least you can know the correct range of data.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of an electronic cache register of the present invention, FIG. 2 is a key arrangement diagram showing a keyboard of FIG. 1, and FIG. 3 is a RAM of FIG. FIG. 4 is a schematic diagram showing the configuration of FIG.
FIG. 6 and FIG. 6 are flow charts showing the operating state of FIG.
FIG. 7, FIG. 8, FIG. 9, and FIG. 10 are views showing the printed state of the report. (1) …… CPU, (2) …… keyboard, (3) …… RO
M, (6) ... RAM, (7) ... display, (8) ... printer, (9) ... PROM writer, (10) ... nonvolatile memory.

Claims (1)

[Claims] 1. A keyboard for inputting cash registration data and operation modes such as settlement, registration, and preset, a RAM for storing cash registration data and cumulative total sales amount data input from the keyboard, and the cumulative sales amount data. A non-volatile memory capable of storing a plurality of pairs of the parity calculation result and the parity calculation result, a memory control device for controlling writing or reading to the non-volatile memory, a cumulative calculation means, a parity calculation means, a comparison means, and a printer. ,
And a means for executing control of the respective parts in response to a key signal of the keyboard, and when there is an input for designating a registration operation mode from the keyboard, the control means outputs money registration data input from the keyboard. Sequentially storing in the RAM, and when there is an input for designating the settlement operation mode from the keyboard, the control means calculates the total sales amount data based on the money registration data stored in the RAM by the cumulative calculation means. Calculated and cumulatively added to the cumulative total sales amount data in the RAM, and executing the parity calculation for the cumulative total cumulative sales amount data using the parity calculation means, and the result and the total cumulative total amount data pair. To the nonvolatile memory, and controls the memory controller to write the new data to the nonvolatile memory. When a preset operation mode is input from the controller, the control unit controls the memory control unit to sequentially read the pair of cumulative total sales amount data and the parity calculation result in the non-volatile memory, and to read the accumulated total. A new parity calculation for the total sales amount data is executed by using the parity calculation means, and the result and the parity calculation result forming a pair with the cumulative total sales amount data read to the nonvolatile memory are sent to the comparison means. The electronic cash register is characterized in that if there is no match, an error is printed by the printer.