Method and apparatus for securing access to a ladder logic programming and monitoring system
US5127099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2141
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.