The state equation of Petri net for the LD program

Author

Gi Bum Lee ; Lee, Jin S.

Author_Institution

Res. Inst. of Ind. Sci. & Technol., Pohang, South Korea

Volume

4

fYear

2000

fDate

2000

Firstpage

3051

Abstract

This paper presents the process for converting A and B contacts in the ladder diagram (LD) into a Petri net (PN). In order to represent the A and B contacts in the LD program with the PN graph, the concept of preservation arc is introduced. The resulting PN is then compared with the conventional PN using a timing chart. The state equation for the A and B contacts is constructed in a transition vector. Using the equation, each state equation for the LD program is created, such as the A contact function and the B contact function. The state equations are validated using examples

Keywords

PLD programming; Petri nets; control system synthesis; programmable controllers; LD program; Petri net; function block diagram; instruction list; ladder diagram; preservation arc; programmable logic controller; sequential function chart; state equation; structured text; timing chart; transition vector; Computer numerical control; Equations; Logic programming; Materials science and technology; Process control; Production control; Programmable control; Relays; Robot control; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems, Man, and Cybernetics, 2000 IEEE International Conference on

Conference_Location

Nashville, TN

ISSN

1062-922X

Print_ISBN

0-7803-6583-6

Type

conf

DOI

10.1109/ICSMC.2000.884466

Filename

884466