JPH0157425B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data recording abnormality determination device for a magnetic recording medium, and in particular to a magnetic recording medium for determining a data recording abnormality when recording various data on a magnetic recording medium in block units. The present invention relates to a data recording abnormality determination device for a recording medium.

For example, electronic cash register (ECR)
In order to collect registration data online in POS systems at gas stations and gas stations, the registration data is collected and recorded on a cassette tape, which is an example of a magnetic recording medium. In this way, the cassette tapes that collect and record registered data are collected at one location, such as a calculation center, after business hours.
It is used to perform various data processing or aggregation processing. However, when recording registration data magnetically on a cassette tape, if there is a recording error,
You will end up collecting incorrect data. Therefore, if a data recording abnormality on the cassette tape is discovered at the time of collecting the registration data recorded on the cassette tape, there is a problem in that it is difficult to restore the data.

Therefore, the purpose of this invention is to
After data to be collected in a terminal device such as a system is recorded on a magnetic recording medium, it is possible to determine the presence or absence of a recording abnormality before collecting the data, and when processing the data later, the data block number of the recording abnormality can be known. An object of the present invention is to provide a data recording abnormality determination device for a magnetic recording medium.

In summary, when recording data to be collected on a magnetic recording medium, the present invention magnetically records a large amount of data by dividing it into blocks of a predetermined data length, and assigns a different number to each data block. shall be taken as a thing. Then, data is read from the magnetic recording medium to detect data recording abnormalities, and the printing means built into the terminal device prints and records the data blocks in which the recording abnormalities occur so that they can be identified.

In the following description, an ECR will be described as an example of a terminal device from which data should be collected.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an electronic cash register which is an example of a terminal device to which the data recording abnormality determination device of the present invention is applied. In the figure, ECR
10 includes a microcomputer or microprocessor (hereinafter referred to as CPU) 11. This CPU1
A magnetic recording/reproducing device 12 is connected to 1. The magnetic recording/reproducing device 12 magnetically records information on a magnetic tape or a magnetic card included in a cassette tape, which is an example of a magnetic recording medium.
Further, a keyboard 13 and a printer 14 are connected to the CPU 11 . This keyboard 13
If the terminal device is an ECR, it includes numeric keys 131 for inputting registration information, function keys 132 such as department codes and total keys, and a check command key 133 for commanding to check magnetically recorded data. The printer 14 prints and records the registered data registered by operating the keyboard 13 as a customer's receipt, prints a store copy, and further identifies the presence or absence of magnetic recording abnormalities as shown in FIG. 7, which will be described later. It is used to print and record information. Furthermore, CPU1
1 includes a read-only memory (ROM) 1 for storing an operating program as shown in FIG. 6, which will be described later.
5 and a writable/readable memory (RAM) 30 for temporarily storing registration data and storing various processing data are connected. Note that details of the storage area of the RAM 30 will be explained in FIG. 5, which will be described later.

FIG. 2 is a diagram schematically showing a recording mode of a magnetic tape, which is an example of a magnetic recording medium on which data is magnetically recorded by the magnetic recording/reproducing device 12. As shown in FIG.

In the figure, when the magnetic recording medium is, for example, a magnetic tape 20 such as a cassette tape, a through hole 21 representing identification information BOT at the beginning of the winding is bored at the beginning of the magnetic tape. And magnetic tape 2
The tape header recording area 22 is allocated to the leading area in the transport direction of 0. The area following the tape header recording area 22 along the transport direction is a data block recording area 231 to 2 for recording data in units of a plurality of data blocks.
3n is defined as the data recording area 23. Then, in a portion of the data recording area following the last data block 23n, a tape end mark indicating that data recording has been completed is recorded in the tape end mark recording area 24. A through hole 25 is provided at the end of the magnetic tape 20 to indicate identification information BOT representing the end of the tape.

FIG. 3 is a diagram schematically showing the data contents of the tape header block recorded in the tape header recording area 22. For example, the tape header recording area 22 is divided into a plurality of recording areas 22a to 22h. A preamble code indicating the beginning of data recording in one block unit is recorded in this recording area 22a. A tape identification code for identifying the cassette tape is recorded in the recording area 22b. Recording date data is recorded in the recording area 22c. A code representing the recording location where data is recorded on this cassette tape is recorded in the recording area 22d. A space code is recorded in the recording area 22e. Recording area 22
f and 22g contain a check code (CRC code) for checking recorded data.
are recorded respectively. As such a check code, for example, a parity error code for detecting a parity error and various other error codes are used. In the last recording area 22h of the tape header recording area 22, a postamble code indicating the end of recording of one block of data is recorded.

FIG. 4 is a diagram schematically showing one block unit of data recorded in each data block included in the data recording area 23. One recording area 231 to 23n each corresponds to a plurality of recording areas 23
It is divided into a to 23k. And recording area 23
A postamble code indicating that it is the beginning of data recording in units of one block is recorded in a. A block number code representing the data block number is recorded in the recording area 23b. The data block numbers are consecutive numbers. A processing classification code is recorded in the recording area 23c.
Card information is recorded in the recording area 23d.
A product code is recorded in the recording area 23e.
Data representing the quantity is recorded in the recording area 23f. Data representing the unit price is recorded in the recording area 23g. Total amount data is recorded in the recording area 23h. Recording areas 23i and 23j
A check code is recorded in each. A postamble code indicating the end of recording one block of data is recorded in the recording area 23k. Note that the recorded data shown in the figure shows the case where the terminal device is an ECR, but the data recorded here is assumed to be appropriate data depending on the type of the terminal device. However, each of the preamble code, data block number, check code, and postamble code shall be recorded in the same way regardless of the type of terminal device.

FIG. 5 is a diagram schematically showing data stored in the storage area of the RAM 30. RAM30
includes a plurality of storage areas 31-38. This storage area 31 stores the total number of data recorded in blocks on the magnetic tape 20, and its contents are rewritten in increments of 1 for each data block. Therefore, the storage area 31 is used as a total data item counter area. The storage area 32 stores data in blocks recorded on one cassette tape.
This area is used as a normal data count counter area that counts and stores the number of normally recorded blocks. The storage area 32 is used as a cumulative error counter area that counts and stores the cumulative number of recording abnormalities among the data recorded on one magnetic tape. The storage area 34 is used as a temporary error counter area for temporarily counting and storing the number of abnormal blocks. In addition, in the following description, each storage area 31-34 will be abbreviated as a counter. Storage area 35
is an area for storing the data block number of one block recorded immediately before. The storage area 36 is
It is used as an error flag to remember that a recording abnormality has occurred. The storage area 37 is used as an area for recording registration data to be collected.

FIG. 6 is a flowchart for determining whether or not data recorded on a magnetic tape is abnormal, which is a feature of the present invention. Note that the normal registration operation of the ECR of an example of a terminal device to which the present invention is applied is performed by a conventionally well-known operation, so a flowchart thereof will be omitted. Therefore, only the points related to the invention of the present application will be briefly explained below.
In the ECR, registration data registered using the keyboard 13 is stored in the registration data storage area 38 of the RAM 30. The storage format of this registered data includes, for example, the sales quantity for each product code, its unit price, and the total amount.

FIG. 7 is a diagram schematically showing an example of a printing format in which the results of determining recording abnormalities on the magnetic tape are printed and recorded by the printer 14.

Next, the specific operation of this embodiment will be explained with reference to FIGS. 1 to 7.

The registration data stored in the registration data storage area 38 of the ECR 10 is magnetically recorded on a magnetic tape in response to an appropriate recording command. A tape end mark is recorded in a recording area 24 following the data recording area 23. When the cassette tape is recovered to collect the registration data magnetically recorded on the magnetic tape 20, it is determined whether or not there is any recording abnormality in the data recorded on the magnetic tape as follows. . At this time, the operator presses the check command key 133 after rewinding the cassette tape. In response to this, the CPU 11 starts the operation of the flowchart shown in FIG.

First, in step 1, the magnetic recording/reproducing device 12 is driven to transport the magnetic tape.
At this time, a photoelectric detector (not shown) included in the magnetic recording/reproducing device 12 detects the through hole 21 representing the beginning of the winding. Subsequently, in step 2, one block (first block) of data recorded on the magnetic tape 20 is read out. In step 3, it is determined whether one block of data read from the magnetic tape has been recorded normally. At this time, since the first block of data read is the tape header, it is determined whether or not it was recorded normally based on the preamble code, tape identification code, first and second check codes, and postamble code. is judged. If the data has been recorded normally, it is determined in step 4 whether or not the one block of data that has just been read represents a tape header. If the data represents a tape header, the process advances to step 5, which will be described later. On the other hand, if it is determined in step 3 that the read data is a recording error, or if it is determined in step 4 that the data just read is not a tape header, this indicates a recording error and the subsequent data block will be read. The operation ends without any trouble.

If the data representing the tape header is recorded normally as described above, the counter 31 is set to 1 in step 5. That is, if the data representing the tape header is normal, it is counted as one block of data. In step 6, the contents of counters 32, 33, and 34 are all cleared. That is, the contents of each counter are set to zero. In step 7, the error flag 37 is set to zero. In this way,
Initial state settings are performed.

Subsequently, in step 8, it is determined whether or not the through hole 25 has been detected, that is, whether or not the EOT mark has been detected. However, if the recording abnormality of all data blocks recorded on one cassette tape has not been determined, the EOT
Since no mark is detected, proceed to step 9. In step 9, the recorded contents of one data block recorded sequentially in the transport direction of the magnetic tape are read. In step 10, it is determined whether the one block of data that has just been read has been recorded normally.

A determination as to whether this one block of data has been recorded normally is made based on the preamble code, check code, or postamble code shown in FIG. If it is determined that the data has been recorded normally, proceed to step 11. In step 11, it is determined whether the data just read is a tape end mark. If it is determined that it is not a tape end mark, proceed to step 12.
Proceed to. In step 12, error flag 37
It is determined whether the stored content of is logical "1" or not. At this time, if no data recording abnormality is detected yet, the logic "1" is not stored in the error flag 37, and the process proceeds to step 13. In step 13, it is determined whether the number of one data block just read out is in a predetermined order, that is, in ascending order.
If the data block numbers are in the predetermined order, it is determined that the data has been recorded normally, and the process proceeds to step 14. In step 14, the number of the data block just read out (ie, the current data block number) is updated in the storage area 35 for storing the previous data block number. At step 15, the contents of the counter 32 are incremented by 1. As a result, the number of normally recorded data blocks is incremented by one. After that, in step 16, the counter 3
1 is added to the contents of 1, and the total number of data blocks checked for recording abnormality is incremented by 1. Thereafter, the process returns to step 8 described above. In this manner, if the data of one block read from the magnetic tape is recorded normally, the operations of steps 8 to 16 described above are repeated in the order of block numbers.

Next, an explanation will be given of the operation when the magnetic recording contents in a data block of a certain number are not recorded normally. In step 10 described above, if one block of data is not recorded normally, the process advances to step 17. At step 17, the error flag 37 is set to logic "1". Thereafter, in step 18, the counter 34 is incremented by one. As a result, the counter 34 counts the number of consecutive blocks with abnormal recording. Subsequently, in step 19, 1 is added to the counter 33. Thereafter, the process proceeds to step 16 and step 8 described above. If the contents of one data block are not recorded normally, the operations of steps 8 to 10, 17 to 19, and 16 described above are repeated.

For example, assume that the fifth data block (including the tape header) is recorded normally, but the sixth to ninth data blocks are abnormally recorded. In this case, when the 10th data block is read in step 9, the subsequent operations are performed. That is, in step 10, it is determined that the 10th data block has been recorded normally. Next, in step 11, it is determined that the data just read is not a tape end mark. At step 12, it is determined that logic "1" is stored in the error flag 36, and the process proceeds to step 20. In step 20, the data block number stored in the storage area 35 before the data recording error occurred, the number of the data block read this time, and the count value of the counter 34 (that is, the number of blocks in which a recording error occurred continuously) are calculated. , each printer 1
4 and is printed and recorded. This recording state is shown in FIG. That is, the previous block number before the recording error occurred is printed after the symbol D/A. On the same line, the first normal block number after the recording error is printed after the symbol D/B. The number of consecutive blocks with recording errors is printed after the symbol E on the same line.

Therefore, by looking at the record abnormality check table printed and recorded in this manner, it is possible to easily identify which block number of data has a recording abnormality when cassette tapes are collected and recorded at a calculation center or the like. Therefore, the data of the block number in which the recording error occurred can be easily retrieved by reading it from the data printed and recorded as a store copy using the ECR10 journal printer and inputting it by key operation. It has the advantage of being modifiable.

After that, in step 21, the error flag 3
6 is reset. At step 22, counter 34 is reset. Thereafter, proceed to step 14 described above.

Next, a case where there is an abnormality in which the numbers of data blocks recorded in the data recording area 23 are not in a predetermined order, that is, a case where data is not recorded in only a certain number of blocks will be explained. In this case, in step 13 described above, it is determined that the data block numbers are not in ascending order. Then, in step 22, the previous block number stored in the storage area 35 and the number of the data block read this time are given to the printer 14 and printed and recorded. In this case, for example, the previous block number is printed after the symbol D/A, and the current block number is printed after D/B. At this time, no data representing the number of recording abnormalities is printed after the same line as the print line of the current block number. This has the advantage that two types of recording abnormalities can be printed in a distinguishable manner: when recording abnormalities are continuous and when data is not recorded in ascending order.

As described above, it is determined whether all the data recorded on the magnetic tape 20 is recorded normally or not, and if it is not recorded normally, data that can identify the recording abnormality as shown in FIG. 7 is determined. is printed and recorded.

In the printing example shown in Fig. 7, by printing the block number immediately before the block number of the recording abnormality and the first normally recorded block number after the occurrence of the recording abnormality, the recording abnormality can be visually recognized. Although the case of printing in a manner that is visually distinguishable has been described, it is also possible to print in various other printing formats. For example, each time a recording abnormality is determined,
The block number may be printed.

By the way, as described above, it is determined whether or not there is a recording abnormality in each block of data recorded on the magnetic tape 20, and when the determination as to whether or not there is a recording abnormality in all data blocks is completed, the following operation is performed.
That is, in step 11 described above, the tape end mark is determined, and the process proceeds to step 24. In step 24, it is determined whether data is recorded after the tape end mark. if,
If data is recorded after the tape end mark, this indicates a recording error and the process proceeds to step 17 described above. On the other hand, if no data is recorded after the tape end mark, or if the through hole 25 representing the end of the tape is detected in step 8, the process advances to step 25. In step 25,
The total number of data items counted by the counter 31, the number of normal data items counted by the counter 32, and the total number of error items counted by the counter 32 are as follows:
Each is read out and given to the printer 14, and printed by the printer 14. That is, the total number of data items is printed after the symbol A.LL as shown in FIG. Also, the number of normal data items is printed after the symbol DATA on the same line. moreover,
The cumulative number of errors is printed after the symbol E.

As described above, in the present invention, when the recording abnormality detecting means does not detect a data recording abnormality, the number of the normal block data read by the data reading means is updatedly stored in the first storage means, A storage control means is provided for causing the second storage means to store the number of the first normal data block after the recording abnormality detection means detects a data recording abnormality. When a recording abnormality occurs in a certain block, the numbers of normal blocks before and after the block in which the recording abnormality occurred are stored in the first and second storage means, respectively, so that the abnormality can occur in multiple blocks in succession. Even if abnormality is detected, it is possible to know which block has the abnormality by simply printing the data stored in the two storage means using the printing means. Therefore, even if it is detected that a plurality of data blocks have an abnormality, the numbers of the data blocks with the abnormality can be displayed all at once, so there is an effect that no unnecessary storage area is required. As a result, when collecting data by recording terminal device data on a magnetic recording medium, it is possible to easily change the data of the block number where the abnormality occurred based on the data recorded by the terminal device's printer. In addition, since it is possible to prevent the collection of erroneous data based on recording abnormalities, the accuracy of processed data can be improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an electronic cash register which is an example of a terminal device to which the present invention is applied. FIG. 2 is a diagram schematically showing a recording mode in which magnetic recording is performed on a magnetic tape, which is an example of a magnetic recording medium. FIG. 3 is a diagram schematically showing the data contents of the tape header. FIG. 4 is a diagram schematically showing the data contents of the data block. Figure 5 is
3 is a diagram schematically showing a storage area of RAM 30. FIG. FIG. 6 is a flowchart for explaining the operation of one embodiment of the present invention. FIG. 7 is an illustrative diagram showing an example of a printing format in which the results of determining recording abnormalities are printed. In the figure, 10 is ECR, 11 is CPU, 12
1 is a magnetic recording/reproducing device, 13 is a keyboard, 14 is a printer, 15 is a ROM, and 30 is a RAM.

Claims (1)

[Scope of Claims] 1. A device for determining data recording abnormality in a magnetic recording medium in which data is magnetically recorded divided into a plurality of data blocks and a number is determined for each data block, the device comprising: Data reading means for reading out magnetically recorded data; Recording abnormality detection means for detecting a data recording abnormality in one data block read by the data reading means; a second storage means for storing the number of a subsequent normal data block; when the recording abnormality detecting means does not detect a data recording abnormality, the normal block data read by the data reading means; a number of the first normal data block after the recording abnormality detecting means detects a data recording abnormality is stored in the second storing means. means, a printing means, and causing the printing means to print a number of a data block in which data recording is abnormal in an identifiable manner based on the stored contents of the first storage means and the stored contents of the second storage means. A data recording abnormality determination device for a magnetic recording medium, comprising a print control means. 2. The magnetic recording medium magnetically records identification information of the magnetic recording medium in the first data block of the plurality of data blocks, and the recording abnormality detection means detects that the identification information of the magnetic recording medium is predetermined identification information. 2. A data recording abnormality determination device for a magnetic recording medium according to claim 1, which detects a recording abnormality based on the fact that the data recording abnormality is not detected. 3. The magnetic recording medium according to claim 1, wherein the recording abnormality detecting means detects a recording abnormality based on the fact that the data block numbers read from the data reading means are not in a predetermined order. Data recording abnormality determination device. 4. The print control means is capable of identifying the number of the data block having the data recording abnormality,
Claims further comprising causing the printing means to print a number of a preceding normal data block stored in the first storage means and a number of a subsequent normal data block stored in the second storage means. A data recording abnormality determination device for a magnetic recording medium according to any one of items 1 to 3.