Title :
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
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;
Conference_Titel :
Industrial Electronics Society, 1989. IECON '89., 15th Annual Conference of IEEE
Conference_Location :
Philadelphia, PA
DOI :
10.1109/IECON.1989.69732
