JP2801243B2 - Reader / writer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a technology for using a so-called IC memory card, and more specifically, for files such as programs for NC (numerical control) machine tools. As a storage medium
The present invention relates to improvement of a reader / writer device when an IC memory card is used.

[Conventional technology]

In recent years, the spread of so-called FA systems using NC machine tools, industrial robots, and the like has been accelerated, and accordingly, storage of such machining programs has become a problem.

That is, in a factory environment where FA equipment as described above is installed, dust, moisture, oil droplets, iron powder, and the like are generally apt to be present, so weak magnetic tapes and floppy disks are used for storing processing programs. Use as a medium tends to be avoided, and as a result, most factories still use paper tape that is bulky and difficult to handle.

Therefore, in the past, as a substitute for the paper tape, it has been proposed to use a contact type or contactless type IC memory card having relatively excellent environmental resistance as a storage medium of a processing program. For the reader / writer device for storing and reading the processing program to and from the IC memory card,
What is not always satisfactory is not provided.

[Problems to be solved by the invention]

That is, the conventional reader / writer device has excessive components including a keyboard and a display device of the same scale as a handheld computer, and in order to execute a desired process, characters and numerals are transmitted from the keyboard. It is necessary to input the data, forcing the user to perform the same complicated operation and high price as a hand-held computer, or to simplify the configuration.
Operational conventions are unusually numerous, and operations are complicated and difficult to understand.Those that simultaneously satisfy the simplification of the configuration and the simplicity of operation have not yet been realized. In state.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a reader / writer device that can execute a write or read process with a simple operation that is easy to understand while simplifying the configuration and display means for an external operation.

[Means for solving the problem]

The configuration of the present invention for achieving the above object will be described based on the functional block diagram of FIG.

The reader / writer device according to the present invention comprises a serial communication interface means 2 for connecting with an external device 1 such as an NC machine tool, and an IC memory card interface for accessing a detachable IC memory card 3. Means and a push switch for external operation including a function mode selection switch 5, a file number selection switch 6 and an execution command switch 7 (including a so-called touch type switch)
Function mode selection means 8 for sequentially selecting one function mode from a plurality of function modes including a read mode and a write mode in response to an input signal from the function mode selection switch 5; A function mode display means 9 for displaying the function mode selected by the means 8; and a file for sequentially selecting one file number from a plurality of file numbers in response to an input from the file number selection switch 6. It has a number selecting means 10 and a file number displaying means 11 for indicating the file number selected by the file number selecting means 10. Further, when the read mode is selected by the function mode selection means 8, the read control means 12 responds to an input from the execution command switch 7 and stores the file of the selected file number in the IC memory card 3 in the IC memory card 3. .Interface means 2 for reading data and serial communication
The writing control means 13 transmits the command to the external device 1 via the serial interface in response to an input from the execution command switch 7 when the writing mode is selected by the function mode selection means 8. The file data input from the external device 1 via the communication interface means 2 is stored and written in the IC memory card 3 as the file data of the selected file number.

The IC memory card 3 uses an electrically rewritable SRAM or EEP-ROM as a storage element, and via the IC memory card interface means 4,
It is detachable from the reader / writer device itself.

〔Example〕

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

FIG. 2 is a block diagram showing the configuration of a reader / writer device according to one embodiment of the present invention, and FIG. 3 is a plan view schematically showing the appearance.

The reader / writer device of the present embodiment includes a CPU 21, a ROM 22 for storing a program, a RAM 23 for temporarily storing processing data, an input port 24, and a memory provided as an interface means for an IC memory card. A card connector 25, a serial communication interface circuit 26 and a serial communication connector 27 provided as serial communication interface means between the external device 1 and the LCD driver 29 for driving a liquid crystal display device 28; It has a bus line 30 composed of a data bus, an address bus and a control bus connecting the elements, and the input port 24 has a function mode selection switch S ₁ , a function mode set switch S ₂ , and a file number selection switch.
External operation push switch consisting of S _3, and executes the instruction switch S ₄ is connected.

Note that the liquid crystal display device 28 in this embodiment is provided as a dot matrix type display device having an eight-character one-line configuration, and a so-called RS-232C connector is used as the serial communication connector 27. .

FIG. 4A is a diagram showing a memory map of the IC memory card 3 with a built-in SRAM in the present embodiment. The memory area of the SRAM includes a system ID code area 40, a directory area 50, and a file allocation. A table (hereinafter referred to as FAT) 60 and a file area 70 including all other areas.

The system ID code area 40 is an area for writing a special identification code for indicating that the card is a card for the present reader / writer device.

In this embodiment, since one IC memory card 3 is configured to store up to eight files of NC machine tool programs and the like, the directory area 50 has No. It is divided into eight individual file directory areas 1 to No. 8. Further, the file area 70 is divided into sectors each having a predetermined number of bytes.
Just like the AT, this area is provided for storing chain information on constituent sectors of each file stored and written in the file area 70.

On the other hand, in the individual file directory area, as shown in FIG. 4 (b), attributes such as whether the file of the number is already written or not written in the IC card are written. File attribute area 5
1, a file name area 52 for writing a file name such as a unique number of the NC machine tool program;
The first sector number area 53 for writing the first sector number of the file No., and the sector number area 5 for writing the number of sectors constituting the file of the No. 5
4. It comprises a checksum area 55 for writing a checksum of the file data of the number. The checksum area 55 is provided to detect and warn when a change occurs in the written file data due to some accident.

Next, FIG. 5 is a state transition diagram showing an outline of a flow such as an operation and a display state of the reader / writer device, and the operation of the reader / writer device of the present embodiment will be described below according to the state transition diagram. Will be described.

The interrogator is connected to a suitable external device, and the operating power is turned starts, it liquid crystal display device 28, it is necessary to select a function mode by the operation of the function mode selecting switch S ₁ To indicate
The display "FUNCTION" is performed as shown in the state M1.

Each pressed the function mode selection switch S ₁ from this state, the read mode (READ), a state represented by state M2
Write mode (WRITE) indicated by M3, erase mode (ERASE) indicated by state M4, comparison mode (VERIFY) indicated by state M5, written file number confirmation mode (FILES) indicated by state M6, state M7 It is possible to sequentially and cyclically select each function mode in the order of the card status mode (STATUS) shown, and the card initialization mode (FORMAT) shown in state M8, and the liquid crystal display The device 28 indicates which function mode is currently selected.

Meanwhile, the read mode, write mode, erase mode, in a state where any of the comparison mode is selected, pressing the function mode set switch S _2, is fixed to the functional mode of the currently selected, this time the file number to show that there by the selection switch S ₃ to the state in which it is necessary to select the file No. of processing object (hereinafter file number selection request state), the liquid crystal display device 28 in each functional mode, the state R1, W1 , E1, V1,
“FILE No.” is displayed.

From this state by each press a file number selection switch S ₃ is the file number to be processed sequentially, it is possible to continue to sequentially selected, the leader of the embodiment
Writer apparatus reads mode, erase mode, at the time of selection of the file number in the comparison mode, in response to input from a file number selection switches S _3, from the previously written file number in the IC memory card 1 It is configured to sequentially select file numbers. Therefore, for example, of the eight files No. 1 to No. 8,
Files 3, 4, 5, and 8 have already been written and N
When o.2,6,7 file is referred to as being unwritten state, the read mode, the erase mode, in either mode of comparison mode, each pressing a file number selection switch S ₃ 1, 3, 4, 5 , 8 in that order, the file numbers are sequentially selected. In the state where each file number is selected, the liquid crystal display device 28
Displays the currently selected file number as shown in states R2, R3 or E2, E3 or V2, V3. In the display state of the file number being selected by the liquid crystal display device 28, the four characters "####" displayed in parentheses are the unique file names (files) of the file of the selected number. In the case of a program for an NC machine tool, this indicates a unique number). If there is no unique file name, the display of this portion is blank.

On the other hand, when the write mode is selected, in response to input from a file number selection switches S _3, configured to sequentially select one file number from the file number of unwritten IC memory card Have been.
Thus the No.2,6,7 file is referred to as being in a state of unwritten, in the write mode, choose 2,6,7 every pressing a file number selection switches S _3, file number sequence, sequentially While the file numbers are being selected, the liquid crystal display device 28
Displays the currently selected file number as shown in states W2 and W3.

In the case of the above-described file number selection processing, the CPU 2
1 selects a file number in an appropriate order according to each function mode based on each information of the directory area 50 in the IC memory card 3 and controls display on the liquid crystal display device 28. It is configured as follows. Also in the selection process of the file number, if no selectable file, the file number selection switch S ₃ than the file number selection request state is pressed, the display of "NO FILES" by the liquid crystal display device 28 (not shown ) Is performed.

On the other hand, in each function mode, a state in which any file number is selected (hereinafter, the file number is being selected)
In, pressing the execution instruction switch S _4, are processed in accordance with each function mode is executed, and if successful, a liquid crystal display device 28 as shown in state K is that the process was successful Specify. That is, in the state of the file number selected in the read mode, when the execution command switch S ₄ is pressed, CPU 21, based on the information of the individual directory area and the FAT60 for film of the number, the file than the file area 70 The content of the read file is transmitted to the external device 1 via the serial communication interface circuit 26 and the serial communication connector 27.

Also the file number executed with the selected instruction switch S ₄ is pressed in a write mode, CPU 21 via a serial communication interface circuit 26 and a serial communication connector 27, the file sent from the external device 1 At the same time as receiving the data, a process of writing the received data to the file area 70 and a process of writing necessary information to the file-specific directory area and the FAT 60 of the number are executed.

Further file number executed with the selected instruction switch S ₄ in the erasing mode is pressed, CPU 21 is changed to write information for individual directory area and the FAT60 for files of the numbers, removal processing of the file of the ID I do. That is, in the reader / writer device of the present embodiment, as described in the file number selection process in the write mode, when a new file is stored and written in the card, the unwritten file number is Since it is configured to select the number of the file to be newly written from among them, if you want to use the file number that has already been written and used as the number of the file to be newly written, This means that old files that are no longer needed need to be deleted by the file deletion process.

In the state of the file number selected in the comparison mode, an execution command switch S ₄ is pressed, CPU 21 via a serial communication interface circuit 26 and a serial communication connector 27, transmitted from the external apparatus 1 file Performs a process of receiving the data and comparing the file data of the number read from the file area 70 with the received data based on the information in the individual directory area for the file of the number and the FAT 60. .

In any function mode, the functions from the state of the file number selection request state or file number selected mode select switch S ₁ is pressed, the processing in the function mode in the selection is canceled, function mode selection sequence To the next function mode selection state.

On the other hand, when the function mode set switch S ₂ is pressed from the written file number confirmation mode, immediately on the liquid crystal display device 28, as shown with F, has already written file number is displayed. Also, if the card status mode from functional mode set switch S ₂ is pressed immediately as is on the liquid crystal display device 28 shown in the state G, the number of unused bytes of the file area 70, kilobytes (KB) Is displayed with.

Further, when the function from the card initialization mode mode set switch S ₂ is pressed, as is on the liquid crystal display device 28 shown in the state H, once, the display of the confirmation request is made,
When this condition than the execution instruction switch S ₄ is pressed together with a predetermined code to the system ID code area 40 is written in the directory area 50 and FAT60, all numbers file in unwritten, and all Write processing for initialization is performed so that the sector becomes unused.

Also for any function mode described above even once, from a state where the process is completed, pressing either of the switches S ₁ to S _4, returns to the function mode selection request state shown by the state M1.

In the above-described embodiment, the display unit of the selected function mode and the display unit of the selected file number are displayed by switching exactly the same display unit. , Can be provided separately without increasing the scale of the display device.

〔The invention's effect〕

As described above, according to the present invention, one function mode is sequentially selected from a plurality of function modes by the function mode selection means, and the function mode display means
Since the selected function mode is configured to be displayed, it is not necessary to provide an operation switch for designating a function mode corresponding to each function mode. Can be easily identified. Further, since one file number is sequentially selected from a plurality of file numbers by the file number selection means, and the selected file number is displayed by the file number display means, There is no need to provide a file designating switch or the like for each file, and the selected file number can be identified. In addition, when the read mode is selected, the file number selecting means is configured to sequentially select one file number from the file numbers already written in the IC memory card. There is no risk of erroneous selection of an unwritten file number, and the selection of a target file becomes easier accordingly. In addition to the above, in the writing mode, the file number selecting means is configured to sequentially select one file number from the unwritten file numbers in the IC memory card, so that the already-written This eliminates the risk of erroneously selecting the file number of the user, and prevents accidents such as accidentally overwriting and losing necessary files.

That is, according to the present invention, it is possible to sequentially select one from a plurality of valid selection targets by repeating the same operation for both the selection of the function mode and the selection of the file number. Since the user can proceed with each operation while always confirming the selection state of what is selected by a simple display, a reader / writer device with a simple configuration and easy to use can be manufactured at low cost. It can be provided by.

[Brief description of the drawings]

1 to 5 show a reader / writer device according to an embodiment of the present invention. FIG. 1 is a functional block diagram showing a basic configuration, FIG. 2 is a block diagram showing a circuit configuration, and FIG. 3
4A and 4B are a memory map diagram of an IC memory card, and FIG. 5 is a state transition diagram showing a flow of an operation and a display state. 1 ...... external device, 2 ...... serial communication interface unit, 3 ...... IC memory card, 4 ...... IC memory card interface means, 5, S ₁ ...... function mode selection switch, 6, S ₃ ...... file Number selection switch, 7, S ₄
...... Execution command switch, 8 ... Function mode selection means, 9
…… Function mode display means, 10 File number selection means, 11
1 ... file number display means, 12 ... read control means, 13 ... write control means, 25 ... IC memory card connector, 26 ... serial communication interface circuit, 27 ... serial communication connector, 28 ... ... Liquid crystal display device, 29 ... LCD driver.

Claims (2)

(57) [Claims] 1. An interface means for serial communication for connecting with an external device such as an NC machine tool, an interface means for an IC memory card for accessing a removable IC memory card, a read mode and a write mode. Function mode selection means for sequentially selecting one function mode from a plurality of function modes including a mode, function mode display means for displaying the function mode selected by the function mode selection means, File number selecting means for sequentially selecting one file number from among them, file number displaying means for displaying the file number selected by the file number selecting means,
When the read mode is selected by the function mode selection means, read control for reading the file data of the selected file number in the IC memory card and transmitting the read data to the outside via the serial communication interface means. Means, and when the writing mode is selected by the function mode selecting means, file data input from the outside via the serial communication interface means as file data of the selected file number. Writing control means for storing and writing in the IC memory card, and wherein the file number selecting means is configured to select one of file numbers already written in the IC memory card during selection of the reading mode. File numbers in sequence Interrogator, characterized in that it contains means that. 2. The method according to claim 1, wherein the file number selecting means includes means for sequentially selecting one file number from file numbers which have not been written in the IC memory card while the writing mode is being selected. The reader / writer device according to claim 1, wherein