A high performance programmable controller for CIM systems based on Petri net theory

Author

Kayama, M. ; Nagase, H. ; Morooka, Y.

Author_Institution

Hitachi Ltd., Ibaraki, Japan

fYear

1989

fDate

6-10 Nov 1989

Firstpage

805

Abstract

The authors propose a novel control architecture to realize high-performance programmable controllers which have the features especially suited to CIM (computer-integrated manufacturing) systems: a simple hardware and simultaneous execution of many functional jobs. The execution time of sequence control was decreased by adopting the Petri net theory to its task switching, which enabled the developed PC to perform other jobs, such as servo control, communications, information processing, and so on, under a time sharing condition. All jobs were driven by interrupt requests, which simplify the construction of the operating system. A compact operating system is proposed for dispatching these jobs effectively

Keywords

CAD/CAM; Petri nets; manufacturing computer control; programmable controllers; CIM; PC; Petri net theory; computer-integrated manufacturing; control architecture; execution time; hardware; interrupt requests; manufacturing computer control; operating system; programmable controller; sequence control; task switching; Communication switching; Communication system control; Computer architecture; Computer integrated manufacturing; Control systems; Hardware; Information processing; Operating systems; Programmable control; Servosystems;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 1989. IECON '89., 15th Annual Conference of IEEE

Conference_Location

Philadelphia, PA

Type

conf

DOI

10.1109/IECON.1989.69732

Filename

69732