Masters Theses

Abstract

"This thesis confronts the issue of set path communication in Programmable Logic Controllers (PLCs). In order to increase reliability in a networked automated process, it is necessary to develop a dynamic method of communication between PLCs. Three methods for dynamic messaging in PLCs are explored in this work. These methods are based on the real-time reconfiguration of message paths when communication fails on the originally configured path. The simplest method involves replacing the original message block with an Add-On Instruction (AOI) which can accept multiple communication paths and has the ability to switch between these paths to maintain communication. A more complex method involving a complete network scan in order to automatically build communication paths is also explored. Finally, a direct scan method having the ability to build communication paths between two controllers which are located on multiple common networks is developed. For the purpose of this research the Allen-Bradley ControlLogix platform was used"--Abstract, page iii.

Advisor(s)

Erickson, Kelvin T.

Committee Member(s)

Miller, Ann K.
Sarangapani, Jagannathan, 1965-

Department(s)

Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2010

Pagination

viii, 67 pages

Note about bibliography

Includes bibliographical references (pages 72-74).

Rights

© 2010 Richard Andrew Hardison, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Communication -- Network analysis
Programmable controllers -- Design and construction
Programmable logic devices

Thesis Number

T 9730

Print OCLC #

722899860

Electronic OCLC #

681627082

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