Study on execution time of ladder diagram in programmable controller

Author

Itoh, Yoshiaki ; Miyazawa, Iko ; Sekiguchi, Takashi

Author_Institution

Kanagawa Ind. Technol. Res. Inst., Japan

Volume

1

fYear

1998

fDate

31 Aug-4 Sep 1998

Firstpage

149

Abstract

In this paper, we propose the simple experimental method to realize the execution time of ladder diagram (LD) in programmable controllers (PCs). Characteristics of the execution time of a LD are examined experimentally by using the fundamental LD with repetition. Moreover, we establish the estimation method of the execution time of LD. Thus, the relationship between the execution time and the number of vertical rungs, logical AND and OR operations is examined by adding some contacts to the proposed fundamental LD. The experimental results are analyzed statistically. As a result, the increase of the execution time for the number of rungs is remarkable as compared with that of AND and OR operations

Keywords

programmable controllers; estimation method; ladder diagram execution time; logical AND operations; logical OR operations; programmable controller; vertical rungs; Computer architecture; Hardware; IEC standards; Industrial control; Manufacturing processes; Personal communication networks; Programmable control; Real time systems; Software design; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE

Conference_Location

Aachen

Print_ISBN

0-7803-4503-7

Type

conf

DOI

10.1109/IECON.1998.723961

Filename

723961