JPH06282672A - Mcr card reading control method - Google Patents

Abstract

PURPOSE:To decrease the rate of error occurrence caused by a data reading system at the head part of an MCR(magnetic card reader) card in regard of an MCR card reading control method of an MCR controller. CONSTITUTION:An MCR card reading control method applies an MCR 1 which reads the data strings on an inserted MCR card where these data strings are previously stored, and an MCR controller 2 which stores and analyzes the data strings. In such a constitution, the start and end bits showing the head and the end of a data string respectively are added to the data strings stored in the MCR card. Then a head display bit is added at an optional position of the data string held between the start and end bits to shown that the valid data, i.e., the significant information follow at the next position. The MCR 1 reads the data string and transfers it to the controller 2. The controller 2 detects the head display bit out of the data string, and the valid data following right after the head display bit are stored in the controller 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card reading control method for MCR in a magnetic card reading device (MCR: Magnetic Card Reader), and more particularly to a card reading control method for MCR for reducing reading errors of the MCR card. .

[0002]

2. Description of the Related Art MCR is an MC in which data is magnetically recorded.
This is a device for reading the data by bringing the R card into contact with the magnetic head. Since MCR cards are thin and flexible, they are used in many industrial fields such as financial institutions and convenience stores. For example, MCR cards are used in electronic cash registers, POS terminals, and ATMs (automated payment machines). Has been introduced.

The structure of data recorded on the MCR card is standardized by JBA or ABA. For example, the data according to the JBA standard is, as shown in FIG.
FH ”, a data string indicating the following 69 bytes of meaningful information, 1-byte data“ FFH ”called an end bit, and LRC (longitudinal redundancy chec
k; horizontal redundancy check) It is composed of a total of 72 bytes of 1-byte data called a bit.

FIG. 6 shows a POS which is an example using MCR.
FIG. 7 is a perspective view showing the structure of the terminal, and FIG. 7 is a schematic block diagram of the POS terminal. In FIG. 6, MCR3
By inserting the MCR card in 1, the data recorded in the MCR card is read and, for example, the contents of the data or the menu screen related to the work is displayed on the display 3
It is displayed in 2.

In FIG. 7, the MCR control unit 35 is a CPU.
Mainly composed of a ROM, a RAM, and an I / O controller of peripheral devices such as a display 32, a keyboard 33, and a printer 34 which are connected.

FIG. 8 shows an MCR of a conventional POS terminal.
The schematic flowchart of the card reading operation in the control part 35 is shown. First, it is constantly checked whether or not the MCR card is inserted into the MCR (step S31). MC
Whether or not the R card has been inserted can be determined, for example, by turning on / off a micro switch attached to the insertion port of the MCR, and when the MCR card is normally inserted, the micro switch is pressed to turn on.

When it is determined in step S31 that the micro switch is turned on and a card is inserted, the timer T1 for monitoring data reception is started (step S32), and whether there is data read by the magnetic head of the MCR. Whether the read data is a start bit (FFH) (step S33) is checked (step S34).

If there is no read data or if the read data is not FFH, the process is repeated, but if the timer T1 times out (step S35), a card read error process (step S43) is performed. Return to step S31. When the start bit FFH is read in step S34, the data reception monitoring timer T2 is started (step S36).

Next, it is checked whether there is read data (step S37), and if there is read data, that data is stored (step S38). The data stored at this time includes 69 bytes of meaningful information following FFH, and also stop bits FFH and LRC.
Is a bit.

When the end of data reading is detected by counting the data length or the like in step S39, the 69-byte information read using the LRC bit is checked for read error (step S4).
1). If there is no reading error here (step S42), the reading process is terminated and the normal business process as the next POS terminal is started.

When there is no read data in step S37 and when the reading of data is not completed in step S39, when the timer T2 times out,
The process goes to step S43 described above. Step S42
Even if an LRC error occurs, the process of step S43 is performed, and the card reading operation is performed again (return to step S31).

As described above, in the device using the MCR such as the POS terminal, the data of the MCR card can be read.

[0013]

As described above, in the conventional method of reading the data of the MCR card, in the case of the JBA standard, for example, the data string of the information actually recorded in the card is 69 regardless of the number of bytes
All bytes of data are always read and stored.

Therefore, when the amount of information recorded as information in the card is small, it is necessary to write meaningless data to an empty area in the card, and when reading out, this meaning is meaningless. Data will also be read.

Further, in the MCR in which the magnetic head of the MCR main body is near the card insertion slot, there is a high rate of occurrence of a read error near the first data read when the card is inserted. This is because there is not enough card mileage.

Also, when the card is meandering when the card is inserted, or when the card is inserted incorrectly and the magnetic head of the MCR is caught in the middle of the data recording portion of the card, a read error at the beginning of the data may occur. To occur
I had to reinsert the card.

Further, in the structure of the MCR card, the start bit is usually located about 5 mm from the tip of the card, and even if the data in the latter half of the recorded data string is correctly read, the data in the vicinity of the head Was not read correctly, resulting in a read error. Here, especially, there is little information recorded on the card,
Moreover, if this information data is put in the latter half of the data string and meaningless data is put in the empty area of the first half of the data string, a read error will occur even if the meaningful information in the latter half is correctly read. The following inconvenience will occur.

Therefore, the present invention has been made in consideration of the above-mentioned circumstances, and an arbitrary position of a data string sandwiched between a start bit and an end bit stored in an MCR card is provided. , The leading display bit of the valid data is provided, and the MCR control device detects the leading display bit to read the valid data in the MCR card after that, thereby reading the data of the leading portion of the MCR card. The purpose is to reduce the read error occurrence rate due to a mistake.

[0019]

According to the present invention, there is provided an MCR which inserts an MCR card in which a data string is stored in advance and reads the data string, and an MCR control device which stores and analyzes the read data string. In the MCR card read control method used, a start bit indicating the beginning of the data string and an end bit indicating the end of the data string are added to the data string stored inside the MCR card, and the start bit and the end bit are A head display bit indicating that valid data, which is meaningful information, continues from the next position is added to an arbitrary position of the data string sandwiched between them, and the MCR card is inserted into the MCR. The column is read and transferred to the MCR controller, and the MCR controller detects the leading display bit from the data string and There is provided a MCR card reading control method characterized by storing valid data immediately following the inside of the MCR controller.

Here, the MCR controller is at least C
It is composed of an I / O interface circuit for inputting and outputting a data sequence transferred from the PU, ROM, RAM, and MCR and a control / monitoring signal, and stores the data sequence in the MCR card. Also the keyboard,
A printer and a display may be further provided to perform processing such as displaying and printing.

[0021]

The MCR card has a start bit and an end bit, and at a given position of a data string sandwiched between the start bit and the end bit, valid data that is meaningful information is placed at the next position. A data string having a head display bit indicating that the following is continued is stored.

When the MCR card is inserted, the MCR reads the data string stored in the MCR card and transfers this data string to the MCR controller. Next, the MCR control device detects the leading display bit from the transferred data string and stores the valid data immediately following the leading display bit.

According to the present invention, it is possible to reduce the occurrence of a read error due to an error in reading the data at the head of the MCR card.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. The present invention is not limited to this. FIG. 1 shows a configuration block diagram of an embodiment of the present invention.

Reference numeral 1 is a magnetic card reader (MCR), and the MCR 1 is provided with a microswitch 1a for detecting that the MCR card is set in the insertion slot of the MCR. 2 is the monitoring and control of the operation of MCR1 and M
The MCR control device stores / analyzes the data read by the CR1 and performs processing such as screen display and printing as necessary.

Reference numeral 3 is an MCR interface section, which is M
Input / output control of signals and data with CR1 is performed. MCR
The interface unit 3 includes a RAM 3a, a ROM 3b, and an MCR control unit 3c. MCR control 3c
CP that controls the overall operation of MCR1 and MCR controller 2
This is a part for controlling input / output with U6.

The signals input / output between the MCR 1 and the MCR controller 3c include at least the bar CLS,
Bar RDT and bar RCL are used. Bar CLS
Is a card insertion signal, "L" when the card is inserted
Becomes The bar RDT is the data read by MCR1. The bar RCL is a read clock indicating the reception timing of the data of the bar RDT.

A signal bar MCRINT indicating that the MCR control unit 3c has finished reading data is used between the MCR control unit 3c and the CPU 6 in addition to the signal bars CLS, RDT, and RCT. To be

Reference numeral 4 denotes a RAM, which has therein an area 4a for storing valid data which is meaningful information in the MCR card data read by the MCR1. 5 is R
The OM stores fixed data, programs for control procedures, and the like. The keyboard 8, the printer 9, and the display 10 are connected to the CPU 6 via the I / O interface 7.
Connected to.

Next, FIG. 2 shows the MCR used in the present invention.
7 shows an example of the configuration of a data string of a business card. In principle, the data structure conforms to the JBA standard, and as shown in FIG. 2, a start bit (FFH) and an end bit (FH)
The FH) and LRC bits are provided at predetermined positions, and the total data length is 72 bytes.

Here, the figure shows a case where the actually used effective data is 33 bytes. The valid data is placed immediately before the end bit, and immediately before the valid data,
A head display bit indicating that valid data follows is arranged below. In the figure, A0H is set as the first display bit.
(= 10100000) will be used. Further, 00H is put in a free space of 35 bytes between the start bit (FFH) and the head display bit (A0H).

3 and 4 are flowcharts of the MCR control processing of the CPU in the embodiment of the present invention. First, the CPU 6 initializes the MCR control unit 3c and the like, and displays a message prompting the card insertion on the display 10 via the I / O interface 7 so that the card insertion can be accepted (step S1). .

Next, the CPU 6 checks whether or not the MCR card is inserted (step S2). MC
When a card is inserted in R1, the micro switch 1a in MCR1 is turned on, and this ON signal is sent to CP.
U6 detects. At this time, the CPU 6 starts the timer T0 for 1.5 seconds (step S3). Also,
Further, as the card is inserted, the card insertion signal bar CLS becomes "L".

Next, at step S4, the MCR for checking the data read by the MCR and controlling the transfer.
Start the data read control subroutine. FIG. 4 shows a detailed flowchart of step S4.

In the MCR data read control subroutine in FIG. 4, first, it is checked whether the card insertion signal bar CLS becomes "L", that is, whether the card is in a state where data can be read by inserting the card (step S12). MCR1 is the card insertion signal bar CLS
To "L", the read clock bar RCL is transmitted.

When the bar CLS = "L" is detected by the MCR controller 3c, next, the detection check of the read clock bar RCL is performed (step S13). MCR controller 3c
Checks the interval of the read clock bar RCL, and based on this, the read data bar R sent from MCR1
The DT is sequentially read and checked until the final data is received.

When the MCR card is stopped in the middle of insertion, the bar CLS becomes "H" and the MCR1 stops sending the read clock bar RCL. That is,
In step S13, if an abnormality occurs such that the read clock bar RCL is not detected, the timer T0 timeout is repeatedly monitored in step S13. If T0 timeout occurs, the process proceeds to step S21 and a timeout occurs. Handle errors.

As described above, the read clock bar RC
If L continues to be detected, in step S15, the data bar RD read by the MCR control unit 3c is read.
Check if T is A0H. If it is not A0H, the process returns to step S13 to repeat the process. M
In the CR controller 3c, the bar RDT data is transferred from the lower bit to the internal RAM 3a at the trailing edge of the read clock bar RCL.
Take in.

Next, when it is detected in step S15 that the read data is the leading display bit A0H, in steps S16 and S17, every fall of the read clock bar RCL, that is, bar RCL =.
Each time "L" is detected, the bar RDT data is sequentially R
It is taken into AM3a.

In step S18, the processes of steps S16 and S17 are repeated until the reading of the data is completed, and when the reading of the data is completed, step S18 is executed.
Go to 19. As a result, valid data starting from the data next to the head display bit A0H is read.

The detection of the end of reading the data is performed by, for example,
The number of bytes of valid data is determined in advance, and when the data for the number of bytes is read, it is judged that the data has ended. Further, when FFH does not exist in the valid data, it is possible to determine that the reading of the data has ended when the next LRC is read after detecting the end bit FFH.

In step S19, it is checked whether or not there is an error in the LRC of the read data, and if there is no LRC error in step S20, the process proceeds to step S22. If an LRC error has occurred, this is a data read error, so the internal RAM 3a
In step S21, the MCR control unit 3c sets the bar MCRINT to "L" to indicate that the reading is completed (step S21). S22).

The above is the details of the process of step S4 in FIG. 3. After this process in FIG. 3, the CPU reads the ERR flag and sets the bar MCRINT to "L" (step S5).

If the ERR flag is set to "with error" in step S6, it is checked whether or not the timer T0 has timed out (step S7), and if not, step S4.
Then, the reading control operation is started again.

When the timer T0 has timed out, a card read error process is started, and for example, the display 10 or the printer 9 displays or prints that there is a card read error (step S11), and the process ends.

If the ERR flag is "no error" in step S6, the CPU resets the timer T0 (step S8), and the valid data string read in the ROM 3a is stored in the valid data storage area 4a in the RAM 4. (Step S9). Further, a menu screen indicating that the data on the MCR card has been normally read is displayed (step S10), and the process proceeds to the next normal business process.

The above is the MC in one embodiment of the present invention.
The flow of reading processing of R card data string
Since the leading display bit A0H is inserted in the middle of the data string stored in the R card, and the subsequent data strings are taken into the internal RAM of the MCR control device as valid data, a read error of the MCR card data is made. Can be reduced, and in particular, the smaller the number of data strings used, the more effective the data reading accuracy is.

[0048]

According to the present invention, the head display bit of valid data is provided at an arbitrary position of the data string sandwiched between the start bit and the end bit stored in the MCR card, and the MCR control device is provided. Detects the head display bit and reads the valid data in the MCR card after that, even if a data read error occurs at the head of the MCR card, the data after the head display bit If it is read correctly, it will not cause a reading error and M
The read error occurrence rate of the CR card can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a structure of a data string in the MCR card according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a configuration of a data string in the MCR card according to the embodiment of the present invention.

FIG. 4 is a flowchart of a subroutine for control of reading an MCR card according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a configuration of a JBA standard data string in a conventional example.

FIG. 6 is a perspective view of a POS terminal using MCR in a conventional example.

FIG. 7 is a configuration block diagram of a POS terminal using MCR in a conventional example.

FIG. 8 is a flowchart of MCR card reading control in a conventional example.

[Explanation of symbols]

 1 Magnetic Card Reader (MCR) 1a Micro Switch 2 MCR Controller 3 MCR Interface 3a RAM 3b ROM 3c MCR Controller 4 RAM 4a Effective Data Storage Area 5 ROM 6 CPU 7 I / O Interface 8 Keyboard 9 Printer 10 Display

Claims (1)

[Claims] 1. A MCR card read control method using an MCR which inserts an MCR card in which a data string is stored in advance and reads the data string, and an MCR control device which stores and analyzes the read data string. At MC
A start bit indicating the beginning of the data string and an end bit indicating the end of the data string are added to the data string stored in the R card, and any data string sandwiched between the start bit and the end bit is added. After adding a leading display bit indicating that valid data, which is meaningful information, continues from the next position to the position and inserting the MCR card into the MCR,
The MCR is made to read the data string, transferred to the MCR control device, the MCR control device detects the leading display bit from the data string, and the valid data immediately following the leading display bit is stored inside the MCR control device. A card reading control method for MCR, comprising: