Programmable controller

US4484303A · kind A · utility

Assignee

• Gould Inc. · US

Inventors

• Salvatore R. Provanzano · Melrose, US
• Wilbert H. Aldrich · Winchester, US
• Robert A. D'Angelo · Windham, US
• Emil P. Drottar · Ipswich, US
• John J. Finnegan, Jr. · Hudson, US
• James Heom · Bedford, US
• Lawrence W. Hill · North Eastham, US
• Ronald D. Malcolm, Jr. · Windham, US
• Michael C. Nollet · Andover, US
• Baruch S. Perlman · Cambridge, US
• Michael B. Tressler · Tewksbury, US
• John E. Van Schalkwyk · Andover, US
• Kincade N. Webb · Cambridge, US

Key dates

• Filing date: Jul 20, 1981
• Grant date: Nov 20, 1984
• Expiry date: Jul 20, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/15131
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An improved programmable controller having the ability to use two different data bases while presenting to the outside world a uniform word size. The programmable controller includes pipeline processing and hardware solution of a user control program in a network node format. A memory management scheme is provided allowing for the direct addressability of one-half million words by utilization of a page register. The programmable controller can be incorporated into a network containing other programmable controllers. The programmable controller also incorporates a multi-task interrupt so that the processor can handle more than one job at any particular time. Input/output tasks are handled logically in the scan solving the user networks rather than being based upon a particular physical area of the controller memory.