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Programmable controller system

A programming controller and control program technology, applied in the field of PLC system, to achieve the effect of improving the safety level

Active Publication Date: 2007-05-09
ORMON CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Second, after a regular user who knows the password releases the protection by inputting the password to read the program, he sometimes forgets to reset the protection, and as a result, a person who does not know the password may also be able to read the program.

Method used

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Examples

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Embodiment Construction

[0092] Hereinafter, a preferred embodiment of the PLC system having a user authentication function of the present invention will be described in detail with reference to the drawings.

[0093] Fig. 1 shows a schematic structure diagram of the system of the present invention. As shown in the drawing, this PLC system is formed by connecting PLC 2 and a personal computer 1a functioning as a control program development support device 1 through communication means (for example, RS232C, etc.). In addition, in the figure, A1 is a password storage area, and A2 is a user program storage area. A program created by the user on the control program development support device 1 (referred to as a user program in the sense of a program created by the user) is stored in the user program storage area A2 on the PLC 2 .

[0094] A software module 10 having additional functions, which is the main part of the present invention, is incorporated in the control program development support device 1 . ...

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PUM

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Abstract

A programmable controller system is formed by connecting a personal computer having an aid device program module installed to serve as an aid device for development of control program to a programmable controller having password protect function. A hardware key storing a specified password code is detachably attached to the personal computer. The aid device program module checks whether or not software module with a function of certifying a hardware key exists and if it is found to exist, it is linked as a part of the aid device program module and the function of certifying the hardware key is caused to operate.

Description

technical field [0001] The present invention relates to a PLC system configured by connecting a programmable controller (hereinafter referred to as PLC) and a personal computer functioning as a control program development support device via communication means, and particularly relates to a PLC system having a user authentication function. Background technique [0002] Conventionally, a PLC system configured by connecting a programmable controller (hereinafter referred to as PLC) and a personal computer functioning as a control program development support device via communication means is known. [0003] An example of such a PLC system is shown in FIG. 15 . As shown in the drawing, this PLC system is configured by connecting PLC2 and a personal computer 1a functioning as a control program development support device 1 through communication means (for example, RS232C, etc.). In addition, in the figure, A1 is a password storage area, and A2 is a user program storage area. [...

Claims

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Application Information

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IPC IPC(8): G06F21/00G05B19/05G06F21/31
CPCG05B2219/24165G05B19/056G06F21/31G05B19/058G05B2219/13167G05B2219/24161
Inventor 阵川健山崎贤一
Owner ORMON CORP
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