Method of protecting data stored in a memory of welding...

Details Method of protecting data stored in a memory of welding... Method of protecting data stored in a memory of welding...

2005-10-25

2005-10-25

Paladini, Albert W. (Department: 2125)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Product assembly or manufacturing

C700S012000, C700S207000, C219S130210

Reexamination Certificate

active

06959228

ABSTRACT:
A method of protecting data stored in a memory of a welding controller provided with an EEPROM as a storage element capable of storing welding control data in a welding controller, thereby enhancing reliable protection of data stored in the EEPROM. The method of protecting data stored in a memory of a welding controller comprises the steps of providing the EEPROM having write validity control function means in the controller, using the EEPROM as a storage element for storing welding control data therein, writing the welding control data into the EEPROM and storing the same in the EEPROM, reading the welding control data from the EEPROM when the welding controller is used, and rendering the EEPROM transitive from a write disable state to a write enable state by the write validity control function when the welding control data is changed.

REFERENCES:
patent: 4493040 (1985-01-01), Vanderhelst
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patent: 6072146 (2000-06-01), Matuschek et al.
patent: 6518545 (2003-02-01), Richard et al.
patent: 0 576 305 (1993-12-01), None
patent: 1 085 521 (2001-03-01), None
patent: WO 01/12374 (2001-02-01), None
ST24C04, ST25C04, ST24W04, ST25W04, 4kBit Serial I2C Bus EEPROM with User-Defined Block Write Protection, Feb. 1999 (Feb. 1999), STMicroelectronics XP002206612.
European Examination Report dated Apr. 8, 2004.

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