Method and apparatus for securing access to a ladder logic progr

Details Method and apparatus for securing access to a ladder logic progr Method and apparatus for securing access to a ladder logic progr

1989-06-30

1992-06-30

Eng, David Y.

Boots, shoes, and leggings

36494991, 364DIG2, 3649187, H04L 900

Patent

active

051270994

ABSTRACT:
The present invention discloses a method of securing access to different functions in a ladder logic programming and monitoring system. Access to various functions of the software package can be controlled using the security system of the software package. When shipped, the security system is disabled. The security system can be activated after a master password is entered for the first time. The person configuring the security system, i.e., the system supervisor, sets up the access rights of all other users. Thereafter, to gain access to the software package, the user must enter his name and unique password. The user can access only those functions assigned to his name and password.

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