"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.
Erickson, Kelvin T.
Miller, Ann K.
Sarangapani, Jagannathan, 1965-
Electrical and Computer Engineering
M.S. in Electrical Engineering
Missouri University of Science and Technology
viii, 67 pages
© 2010 Richard Andrew Hardison, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Communication -- Network analysis
Programmable controllers -- Design and construction
Programmable logic devices
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Hardison, Richard Andrew, "Dynamic networking for programmable logic controller communication" (2010). Masters Theses. 4854.