JPS6142037A - Check digit checking system of data input/output use terminal equipment - Google Patents

Abstract

PURPOSE:To execute a check digit of the whole of a numerical data containing a symbol and a decimal point by allocating in advance an intrinsic numerical value to a symbol such as ''+'', ''-'', etc. and a decimal point, and using this allocated intrinsic numerical value. CONSTITUTION:As for an item #''03'' on a TPR input table shown in the table, one of numerical values 00-99 of two digits is allocated in advance with regard to a ''-'' symbol, a ''+'' symbol and a decimal point symbol ''.'', in addition to a kind of a bar code and a kind of C/D. For instance, 11 and 31 are allocated in advance to ''-'' and ''.'', respectively, and in case of executing a C/D check in case when ''-1234.67'' is inputted from the TPR, ''-'' and ''.'' are changed to the allocated numerical values, and a C/D calculation is executed with regard to ''1112343167''. By executing an equal check of its calculation result and the C/D, a check digit of the whole of a numerical data can be executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is connected to a host machine (host computer) in a communicable manner, and prior to data input/output, a program stored in the host machine is loaded. A type of data input/output terminal that inputs and outputs data according to a programmed program, particularly a so-called portable data terminal device (hereinafter referred to as a terminal device) used for inventory management, loading and unloading management, etc. This relates to a check digit check method for input/output data.

[Prior Art] Conventionally, this type of terminal device has been put into practical use in various industries.

By the way, is the conventional terminal device adapted to each type of skin and business practices in the relevant industry? Create a dedicated program that is compatible with
It was offered on the market as a dedicated machine that was stored in the It AM area or the It AM area.

Therefore, in the past, it was necessary to create a dedicated program for each type of industry, such as the transportation industry or wholesaler, or for each individual business within the same industry, such as shipping or receiving operations. Since it can only be used in the same industry cup! ! Different terminal machines had to be prepared for each task, which not only increased the number of terminal machines, but also led to the risk of misuse, complicated management, and poor utilization efficiency.

[Background of the Invention] The applicant of Reiko has developed a device that can communicate with a host machine for the purpose of providing a data input/output terminal that can be configured for each industry and that can input and output data across a wide range of jobs. A data input/output terminal connected to a computer, the data input/output terminal having at least a mode setting means for specifying a program setting mode and an execution mode, a program RAM means for storing a program supplied by the host machine, and a data input/output terminal connected to the host machine. means for creating a plurality of types of business programs by setting various parameters for the stored program; a parameter RAM means for storing set parameters; a data RAM means for storing data; A data input/output terminal which is equipped with at least a business specifying means for specifying one of a plurality of business programs in the mode and can be applied to a plurality of yJ types is disclosed in a patent published on the same date as the zero payment. is suggesting.

The present invention was made in the process of developing a data input/output terminal of the above type, and relates to a check digit check method for numerical data.

Among the numerical data input and output are “+°, °−°.

Some include ° and °. Conventional check digits related to numerical data were calculated only for the numerical value itself, and the above signs and symbols were not subject to check digits, so the reliability of checking numerical data including symbols was affected. It was something lacking.

[Purpose of the Invention] The present invention provides a new check method that can perform check digit checking on the entire numerical data, including numerical data including the symbol and various symbols, among input and output data. is intended to provide.

[Configuration of the Invention] In order to achieve the above object, the present invention provides a host machine H
Data input/output terminal IEO5 communicably connected to M
This is a check digit check method for data input to T, in which symbols and decimal points are sent to a parameter setting means that assigns in advance a unique numerical value to each symbol and decimal point of numerical data, including symbols such as +, -, and decimal point. For numerical data containing , check digit calculation means B is provided to calculate the entire check digit of the numerical data using the unique numerical value assigned above, and check digit checking is performed on the entire numerical data including symbols and decimal points. The present invention provides a check digit check method for a data input/output terminal device, which is characterized in that the data input/output terminal device is configured to double the check digit.

[Effects of the Invention] According to the present invention, it is possible to perform a check digit check including codes and symbols included in numerical data, so that the reliability of the check is significantly improved.

[Example] Examples of the present invention will be described in detail below.

<System Configuration> FIG. 2 shows a system configuration diagram of this device, and FIG. 3 shows a front view of the device.

As shown in Fig. 2, this device consists of a central processing unit l (hereinafter referred to as CP
It should be abbreviated as UI. ) and read-only memory 2 for initial program loading (hereinafter referred to as 110M2 for IPL).
It is abbreviated as ) and random access for programs.
Memory 3 (hereinafter abbreviated as program RAM 3)
and a random access memory 4 for input data and system parameter data (hereinafter referred to as data RAM 4).
It is abbreviated as ) and 3F, which is used for parameter settings and data entry, etc., which are detailed below! A keyboard 5 equipped with a funk tongue key and a numeric keypad, and a power switch 6
, the first one explained below. Second system switch 7.8
and a switch means lO consisting of a mode switch 9;
Liquid crystal display 11 for performing various necessary displays
and various interfaces (r/F), specifically serial l/F12. It is equipped as standard equipment with a parallel I/FI 3, a pen I/P l 4 for reading barcodes, one buzzer, and an earphone connector 16.

A program RAM 17 and a barcode pen reader 18 (hereinafter abbreviated as TPR 18) can be installed as an accessory.

In addition, CPU1 has a serial interface (1/
F)+2 or parallel interface (r/F
) through 13, host Manon (host computer)
19 or other data terminal equipment 20.

As shown in FIG. 3, the keyboard 5
10 numeric keys NK (iXi = O ~ 9) and 20 fan keys FK (D (j = 1 ~ 20)
), and the mode switch 9 is configured as a slide switch for selecting either mode Δ or mode B.

In addition, the above program RAM 3 and data RAM
4 is designed to be backed up by a built-in battery (not shown), and as shown in FIG.
The second nostem switch 7.8 is connected to the battery storage section 21.
3rd place in each [A.

It is arranged as a switch that can be switched between B and C.

These first. As described below, the second system switch 7.8 is a selection switch used in combination with the mode switch 9 to specify various modes, etc., and does not need to be operated by the user. .

Operation Flow (Overall)> FIGS. 5 and 6 show the operation flow executed by CPtjI.

As shown in FIG. 5, when the power switch 6 is turned on,
First, in order to execute the program, a check is made to see if the program exists and whether it is normal or not. Next, a battery check is performed, and if there is no problem in the battery check, the mode is determined.

This mode is set by the combination of the first and second system switches 7.8 and the mode switch 9, as described above.

The modes that can be set are roughly divided into the following five types.

<a> Sum check mode A mode in which the checksum code of the program section and parameter section of the rtAM area is calculated and set in a predetermined memory area.

(b) Execute the diagnostic program in the diagnostic mode ROM area and
A mode to test hardware such as AM, LCD display, keys, buzzer, etc.

(c) Application mode This mode can be further divided into parameter setting mode and practical mode.

(c)-1 Parameter setting mode data entry vJ, Tatsumi (maximum 7F, data output work (1 type), mask data input work (Ill).

A mode in which various business specifications such as data collector business (type 1... obsotan) are set by parameter settings.

(c)-2 Execution mode A mode in which each AI task is executed by each operator of initial setting, initial registration, and task selection (delta entry M task classification, data output task, etc.).

(d) Program load mode A mode for loading the program area and parameter setting area.

This mode is further divided into a mode in which a program is loaded from the main station and a mode in which a program is loaded from another data terminal.

(e) Program unload mode A mode in which the contents of the program area and parallax setting area are anodloaded (outputting the contents for viewing on another terminal).

Table 1 shows the designation methods for various modes.

<Program setting mode> This mode is the most distinctive feature of this device, and various business programs are created by setting the following parameters.

In other words, this device has a single type of business program pre-installed as a unique program for each industry in conventional data terminals of this type, but this device can be used for each industry according to the industry. This is a general-purpose machine that can set the optimal business program while taking into account the user's requests.

(1) Key arrangement in setting mode FIG. 7 shows the key arrangement in the setting mode.

This key arrangement is fixed.

(2) The setting operator settings in the setting mode are as follows:
All of this is done using the keynote sequence shown in FIG.

In FIG. 8, NKI is the job number JOB# (for example, 4 digits), NK2 is the item number 0# (for example, 2 digits),
NK3 indicates a key operation for specifying parameter setting data (various depending on the parameter to be set).

Funkuntan key - 1) Kl is NK when pressed for the first time.
Shift to operation 2 and press the button the second time to select the current JOB#.
Display the settings. Each time the funk key FK2 is pressed, it is automatically updated to the next item # or JOB #. When pressed, the funk-ton key FK3 displays the setting contents of the next JOB#. When checking settings, press down FK3 one after another.

(3) Data format of data registration memory FIG. 9 shows the format of the data registration memory at the time of data entry in the execution mode.

The initial registration record and business classification record are fixed for each delivery system. The heading, detail, and knob records are fixed for each job of each data entry selected for the job. Initial registration, business classification, hebdenog, and footing records may not be available.

Each record other than the business category is composed of a plurality of items as shown in FIG. 1O.

(4) Heading, Detail, and Footing Parameter settings for each record The heading can be the total of each quantity in terms of quantity, the total of the amount in terms of amount, or the date, time, minute, etc. of input or output. It is a part for storing data, and the parameter settings are, for example, for JOB #0101 to 0114.
, items #10 to #14 can be performed.

Table 2 shows the setting method.

Further, the detail is a part that shows details, such as, for example, the derogation and number of individual products. The setting method is
It is shown in Table 3-1 and Table 3-2.

The closing record is a record located next to the last detail record, and is used for closing purposes, such as storing the total amount of money in the detail record, for example.

The setting method is shown in Table 4.

Hereinafter, specific setting methods will be explained according to Tables 2 to 4.

[Item #10] Specification of various information for the item (a) Item length Specify the required length (digit length) for each item. However, C/D
Includes symbol 1 item classification code such as diec code, decimal point '', °, sign ``±'', etc. The digit length specified here is allocated to the data registration memory.

(b) Display area Regarding the area for monitoring when using the numeric keypad manually or displaying the content when inputting manually using the barcode reader TPR,
Specify the number of lines by 1 digit and the length by 1 digit.

(c) Item delimiter code Specifies whether or not to store a code representing the delimiter of each item when storing each manual item in the data registration memory. When storing, specify the code (1 digit).

Note that the code designation is different for 4BIT and 8BIT.

(d) Input end key When manually using the numeric keypad, specify the key that indicates the end of inputting an item using a key code. When the specified key is pressed manually, it is assumed that the input of the item has been completed.

(e) Calendar function The calendar functions provided by the system include old inclusion (initial registration items only) and reading (heading and detail items only).

These functions can be specified as "with" or "without."

If you specify °Yes, the content is "year, month, and day."

Specify only one of [hour, minute J, [year, month, day, day of the week, 3:00].

(Designates whether or not DTPR input is possible. Since manual input using the numeric keypad is always possible for any item, multiple input with the numeric keypad is required for items designated as allowing TPR input.

[Item #11] Specification of various checking methods (a) Month/day check etc. For checking "month/day J", "hour/minute", "month/Sunday hour/minute", for example, 00≦hour≦23.00≦minute≦59 Perform the following checks.

(b) $tj range check This range check, for example, checks whether the manually entered amount is within two limits from its lower limit, so for example, regarding the combination of the upper and lower limits, It can be specified from 10 range tables (01 to 10). For one item, if there is no other check designation (for example, month/day check, etc.), this check can be performed for a maximum of 5N of multiple types, in which case it is performed by "OR" for each IFI. Only significant figures are checked; signs and decimal points are ignored.

Table 5 shows the above range table.

(C) Check Dinot [This is a C/D check for C/DI check input items. C/D checks can be performed by adding other items to the beginning of input items.

As a weight, 11++ fit, ns, n4+
The weight allocation method when Itg is specified is the 11th
As shown in the figure.

Furthermore, the contents of the C/D check can be specified in up to 6 Fl types from the C/D table shown in Table 6.

The parameters to be set include the number of the C/D table, whether or not to add other items, and, if added, the item number.

(d) Comparison check with the 177th period setting memory The manual data is compared with the data stored in the initial setting memory.

As a result of the comparison, if a match is found, the input data is processed, and if it is not a match, an error occurs.

(e) Total check This is an equality check between the manual data value of the heading and detail items and the system's daughterizer (for addition) [to be explained later].
Shown in Figure 2.

This total check can be used for heading and detail records. Here, any one of the system totalizer numbers (01 to 04) is specified.

The system totalizer value (total value) that calculated the total is
Cleared when this check is completed.

The system totalizer will be described in detail in the section ``(C) Use of system totalizer'' below.

(r) Mask data search check This check is possible for heading and detail manual items, and when this check is specified in an input item, the process is as follows.

Note that FIG. 13 shows the structure of the mask file.

(r-1) Specifications at the time of searching and checking master data include specifying key data in input data and specifying the format of mask registration memory.

(r-2) Search from the beginning of the delay record group in the mask registration memory using the specified input data key.

(b) When it is not in the mask registration memory You can specify whether to make it an error or ignore it.

-Sounds a high-pitched long buzzer when an error occurs. The long buzzer can be turned off by pressing the ``Y CIE'' key, and this item can be manually activated again.

・When ignoring After processing the input data, move on to the next item, manual labor.

(b) Display the MAX I O item on the liquid crystal display 11 among the master data items when it is in the mask registration memory. The displayed contents are referred to when inputting detail items.

- Specify the display area for each item of master data (do this for each data entry) Specify the length of each line (1 digit, 1 digit) to be displayed for each valley item.

When the line specification is set to °0°, that item is not displayed.

The position and length of each item of master data and the designation of the edit type for display are shown in Tables 9 and 10, respectively.

In Table 10, the edit designations during display are as follows.

"0"...No editing - Displays the image in memory as is.

1”...Suppress leading zeros and display only the significant digits in memory.

°2″・Display with leading zeros suppressed to the first decimal place.

°3"...FiQ zero is suppressed and displayed to the second decimal place.

Note that the contents of the displayed mask data are erased when the final item of the heading and detail record is manually completed.

This mask data search check will be explained later in the <Master file function> section.

(g) Data registered check This check is possible only for manual items in detail, and when this check is specified for manual items, the process is as follows.

Similar to the memory search function of the detail record, human data (positive integer) is edited in the same way as the memory format, and using this as a key, the data registration memory is searched from the beginning of the current seven detail record group.

(b) Displays the contents of the searched detail record when it has already been done manually, and sounds a high-pitched buzzer. The display is the same as the input screen for the detail currently being input. Editing during display is done as follows.

*Fixed digit items are displayed as images in memory.

* Variable digit items are displayed with leading zeros suppressed. (
If there is a decimal part, " is also displayed.) The subsequent processing is as follows.

* When the key to delete is entered, the buzzer and display contents disappear, and the entire searched detail record in the data registration memory is filled with the specified special code (same as the memory clear code when deleting memory search). Again, this item will be manpower.

*When a key that will not be deleted is manually entered Turn off the buzzer and the displayed content, and then manually enter this item again.

Be able to specify the key to delete or not delete the searched detail record in the data registration memory.

(b) When the input has not been completed After processing the input data, move on to inputting the next item.

[Item #12] Memory editing method such as mesori editing method is heading. Although the designation method differs depending on the type of detail and footy knob, here, the memory editing method of the detail record shown in Table 3 will be mainly explained.

(a) Memory editing method (1) "00° to "02" Decimal point standard and number of decimal digits Specify the position of the decimal point in the memory (0 to 2 digits, no decimal point when O" is specified). With this specification, input data is edited based on the specified decimal point position. In this case, the overflow is cut and the shortage is filled with zeros. If there is no decimal point, edit with the right end as the decimal point. Whether or not the decimal point position is stored depends on the system parameter settings.

(2) "IO° Last digit deletion Delete the last digit (C/D value) of the human input data and store it right-justified. Overflow is captured and shortage is filled with zeros.

(3) "2n-C/D addition Add the C/D value next to the last digit of the input data and store it right-aligned. In other words, °n' specifies the item number of the C/D table. (n: 1-6).

In this case as well, the overflow is cut and the shortage is filled with zeros.

(b) Addition of other items (data synthesis) Addition of other items is a type of data synthesis, and is synthesized with input data of other items (heading or detail).

In this case, in the memory editing method of (a), the other item addition code "30" is specified, and then, in (b), the item number of the other item to be added is specified.

(C) Use of system totalizers This system uses a total of four totalizers (14 digits for the integer part and 2 digits for the decimal part).
is available and can be used in the following ways.

*Save input data.

*Calculate input data by IxI.

* Read the system totalizer data.

* Check that the human data and the system totalizer value are equal.

* Check that the values of system totalizers are equal.

By combining these usage methods with input items, settings can be made, for example, as shown in Table 11 below.

Usable range (+) Use in heading or detail record As shown in Figure 16 (a), the total is a numeric keypad input item, and the input value is the total of items 1 to n. An equality check is performed between the numeric keypad manual input value and the total value (added to the system totalizer when items 1 to n are manually input) (see the section on total check). At this time, it is not possible to input total items from the system totalizer without using the numeric keypad.

(2) Use in detail record and footing record As shown in Figure 16 (b), when inputting the total of the manual input items in the detail record in the footing record, the total numeric key input value and Performs an equality check on the total value (added to the system totalizer when inputting items).

It is also possible to use the system totalizer manually without using the numeric keypad.

(3) Use in heading records, detail records, and footing records As shown in Figure 16 (e), enter the total value of the input items of the detail record in the input items of the heading record ( (Save in system totalizer when total n human power is used)
, when entering the footing record, perform an equality check with the total value of the input items of the detail record (when inputting item n, add it to a system totalizer separate from the one for saving) and the input value of the heading. .

Item E #I3] Specification of key manual method For detail records, four types of key manual methods can be set. For heading and thrusting, it is 1ull.

(a) Specifying the total number of digits However, the total number of digits here is the number of digits in the a significant digit, and does not include the dots and signs.

(b) Number of decimal places Maximum of 2 digits, if there is no decimal part, specify °00''.

(C) Human power mode “θ′...The number of digits is fixed and only positive integers can be input.

°−” and ゛ cannot be entered.

“B... Can manually generate positive integers with various numbers of digits.

“-” and “ cannot be entered.

"2'...Positive and negative integers of various numbers of digits can be input, but numbers with small dots" cannot be input.

"3°...Positive real numbers of various numbers of digits can be input, but "-'' cannot be input.

°４゛　・　Positive and negative real numbers of various numbers of digits can be entered.

(d) Omission of numeric keypad numbers Specify whether or not the numeric keypad numbers can be omitted, and if so, whether to consider it as an input of "0" or manual input of "l". If skipping 11 losses is specified, only the end key can be manually operated (details will be explained later).

(e) Manual editing (a) Right-justification of input data 00° Manually input data is right-justified, and any shortfalls in the specified number of manual digits are filled in with zeros in front.

(b) Left-justification of input data Manually input data is left-justified, and the missing part is later filled in with a filler code (HEX) (l out of "0" to "9").

(c) Replacement start digit during data synthesis First, data synthesis will be explained.

When composing the data described above, specify the replacement start digit.

FIG. 14 shows an example of data synthesis for human power item 2.

As shown in Figure 14, in the manual item 2, the classification code is entered in the top three digits and the product code is entered in the bottom five digits.This time, the five-digit number corresponding to the product code is input. If input, this product code is combined with the previous classification code. In this case, the first digit P to be replaced with the current data (product code) is [Item #
11] in the key manual method.

The data (classification code and product code) synthesized in this way is input into the manual item "2" of the current record.

Such data composition has the effect of making it possible to extremely simplify input operations for data that have some common data.

FIG. 15 shows a data synthesis flow at the time of data entry in the execution mode.

When roux code data entry is started using the numeric keypad or TPH, the input data is displayed on the display, and in step 101, it is determined whether or not to combine it with the previous input data. , and other edits specified in step 102 are performed. “Y
In the case of "ES", synthesis and editing with the previous manual data is performed in step I03. This synthesis method is as described above.

Then, the data after input editing is displayed in step 104, and the composite data can be confirmed.

Further, various checks as described below are performed in step 105, and if the checks are cleared, memory editing is performed in step +06 and data is saved in the write buffer. This operation is done in step 1
The process is repeated until it is determined that the data entry up to the last item has been performed in step 07, and after the manual input of the Lou code is completed, the input data is set in the data memory in step 108, and the process moves to data entry of the next record.

Note that when the above (b) or (c) is specified, the edited data is displayed again in the monitoring area after the manual input using the numeric keypad is completed.

Further, various checks on the input data are performed on the data after the human data has been edited.

[Item #14. +5] Specifying the Tr're method If you want to complete the input manually with one scan, specify the input method in item #14, and if you want to complete the input with multiple scans, specify the input method in item #15.

Basically, the specification is the following TPR input Kadeka table 1
This is done by specifying the number (JOn#) in Table 2).

Specifically, with reference to Table 12, the number of digits to be read, the starting digit position of valid data, the presence or absence of a 2-class classification code, the classification code if present, and the type of barcode (NW-
7, JAN (8,13 digits).

2 out of 5. iN'rERLEAVED
2 outof5), check day nobut table no.

Specify the denmal value of ``°-'', ``+'', ``,'', etc.

For multiple scans, specify input end conditions.

The input termination conditions are: * When there is a TPR input other than the specified number of read digits (1 category), or when there is key input.

*0-9. ``When there is a large input other than ° ('-° is regarded as negative data, other times it is regarded as positive data).

<C/D calculation method for data including symbols such as decimal points> In order to prevent barcode reading errors, a check digit (C/D) check is performed on the read data. Similarly, when inputting data manually using the numeric keypad, a C/D check is performed to prevent numeric input errors.

However, C/D calculations can usually only handle integers. However, when the data includes a decimal point or + or - symbols, C/D calculation cannot be performed as is. Therefore, numbers from 0 to 99 are set in advance for the decimal point and + and - symbols, and when performing C/D calculations, the set numbers can be used instead of the symbols. It is. By doing so, it is possible to calculate C/D for data including symbols other than numbers.

In this case, the specification method is "This item #" is shown in item # "03" on the TPR input table shown in Table 12.
03”, the above-mentioned barcode type, C/D Fl.
In addition to the class designation, the °−” symbol.

Assign one of the two-digit numbers 00 to 99 to the °+" sign and the decimal point °6°. In other words, convert these symbols to appropriate numbers. If you do this, plus, The C/D check can be performed on all real numbers including integers with minus signs and decimal points.

Now, a detailed explanation will be given according to the operational flow of the C/D check shown in FIG.

For example, "-1234,"
67” is input, C/D for this input item.
It is determined in step 102 whether or not to perform the check;
When performing a C/D check, in step 103
−°, and the denmal value specified for these, e.g. “1 bit.

``Replace with 3V.

Therefore, the C/D calculation in step 104 is “
1112343167'', and the calculation result and C/D are checked for equality in step 106. If they are not equal, an error is displayed.

In the above example, we explained the case where "+°, "-" and decimal point" are included, but for example, °\° representing Japanese yen.
The above idea can be extended to other symbols such as .

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the configuration of the present invention, Fig. 2 is a system configuration diagram of a data terminal machine according to an embodiment of the present invention, Fig. 3 is a front view of the data terminal machine, and Fig. 4 is a system switch diagram. Figures 5 and 6 are flowcharts showing the overall flow of the above system, Figure 7 is an explanatory diagram showing the key arrangement in program setting mode, and Figure 8 is a key sequence during parameter setting. Figure 9 is an explanatory diagram of the structure of entry data, Figure 10 is an explanatory diagram of the structure of records, Figure 11 is an explanatory diagram of the check/wait 91 allocation method, and Figure 12 is an explanatory diagram of the system totalizer. A method explanatory diagram showing the equal die 1 method, Fig. 13 is a configuration explanatory diagram showing the structure of the mask file, and Fig.
8! J is a method explanatory diagram showing the data synthesis method, and FIG. 15 is a flowchart showing the operation flow of the data synthesis method.
16(a), 16(b), and 16(c) are method explanatory diagrams showing the usage method of the nostem totalizer, respectively, and FIG. 17 is a flowchart showing the C/D check method including symbols. HM...Hostman, EO5T...Terminal for data output, A...Parameter setting means, B...Check digit calculation means. Patent issuer Sharp Co., Ltd. agent
Person Patent Attorneys Blue and White 2 people No. 15i1 W&2 Figure 6 Figure 7 Figure 8 Procedural Amendment (Method) December 27, 1980

Claims (1)

[Claims] (1) A check digit check method for data input to a data input/output terminal that is communicably connected to a host machine, which checks each symbol and decimal point of numerical data, including symbols such as +, -, and decimal point. For parameter setting means to assign unique numerical values in advance to each, and numerical data including symbols and decimal points,
A check digit calculation means for calculating the entire check digit of the numerical data using the unique numerical value assigned above is provided, and the check digit check is applied to the entire numerical data including symbols and decimal points. A check digit check method for data input/output terminals.