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An Assessment of PLC Software Structure Suitability for the Support of Flexible Manufacturing Processes
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Hajarnavis, Vivek and Young, Ken. (2008) An Assessment of PLC Software Structure Suitability for the Support of Flexible Manufacturing Processes. IEEE Transactions on Automation Science and Engineering, Vol.5 (No.4). pp. 641-650. ISSN 1545-5955
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Official URL: http://dx.doi.org/10.1109/TASE.2007.917135
Abstract
Industrial control engineers continue to make extensive use of ladder logic for programming programmable logic controllers (PLCs) although the limitations of the language are well recognized. Evaluations of alternative approaches have been conducted in academia but industrial users have shown little enthusiasm for the recommendations. This work addresses this by conducting an experimental evaluation using a range of skilled and unskilled participants to establish which of four software design methodologies is best suited to the support of flexible manufacture in a small program through an experiment in which "right first time" rates and completion time are measured. Unlike earlier work which had an emphasis on program creation, this paper reports on process modification. The object modelling tool tested, Enterprise Controls, was found to be the most effective methodology under study with the highest "right first time" rate as well as demonstrating a 80% time saving over traditional relay ladder logic. This was closely matched by step-based ladder logic, provided the concept is used correctly. Areas for further work include the assessment of program development time during setup and control performance in use.
| Item Type: | Journal Article |
|---|---|
| Subjects: | T Technology > TL Motor vehicles. Aeronautics. Astronautics |
| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) |
| Journal or Publication Title: | IEEE Transactions on Automation Science and Engineering |
| Publisher: | IEEE |
| ISSN: | 1545-5955 |
| Date: | October 2008 |
| Volume: | Vol.5 |
| Number: | No.4 |
| Number of Pages: | 10 |
| Page Range: | pp. 641-650 |
| Identification Number: | 10.1109/TASE.2007.917135 |
| Status: | Not Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Rockwell Automation |
| URI: | http://wrap.warwick.ac.uk/id/eprint/29147 |
Data sourced from Thomson Reuters' Web of Knowledge
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