The research Analyses, PROFIBUS Communication using Process Automation and Decentralized
Periphery against Conventional (4-20mA) was based on the process plant constructed in 2012 by staff
and students in the Department of Instrumentation and control at Mangosuthu University of
Technology. Further work was not done including configuring the entire process plant, testing all
devices and display the image of the process plant on human machine interface. The process plant
operation was never tested and the research topic has not been attempted before. The research was
conducted to improve the existing plant to full operation or functional project. The research study was
conducted in March 2013 by BZT Ntshangase, it was established that both DP flowmeter and PA
flowmeter were not tested before, not calibrated correctly and both drives which are (MM440 and
MM420) were not setup to control both pump1 and pump 2 in manual or auto mode. The
Programmable Logic Controller (PLC) was not configured to communicate with all devices on the
network. PROFIBUS-DP and PROFIBUS-PA devices were not set up; input measurements were not
scaled to read within certain limits. All devices used in the process plant were not assigned unique
addresses for the network and DSG files were not installed so that Programmable logic controller
(PLC) would identify all devices on the PROFIBUS network. The research was based on analysis of PROFIBUS communication using process automation and decentralized periphery against
conventional (4-20mA), where one flowmeter was communicating with a PLC via PROFIBUS-DP
and the other flowmeter was communicating through PLC via ET-200M to a DP/PA coupler. Research
objective was to examine the time response between the two signals, data transmission, network
configurations and their communication protocols and including transmission rate for both networks.
Process plant components used in the research were tested for linear scaling, reliability, generalizability
and validity. The reason for performing these tests was to produce consistent results and to checks how
similar results are if the research was repeated under similar circumstances. During testing, respectable
results were achieved. All simulated results were compared with the real-time results and then a
conclusion drawn based on the obtained information and facts. Project design, implementation, test
procedures and test results were achieved because prototype performed as per design and research
objectives were achieved. Simulation tests were conducted and the obtained results analysed. The
achieved results showed that the proposed solution or the prototype system performed as per design.
The experimental results could be useful to other researchers in the future. At the end of the study
conclusion and some recommendations for further studies are discussed efficiently to utilize resources in the process plant verification and validation. / Electrical Engineering / M. Tech. (Electrical Engineering)
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:unisa/oai:uir.unisa.ac.za:10500/23268 |
| Date | 10 1900 |
| Creators | Ntshangase, Blessing Zithulele Tefsa |
| Contributors | Naidoo, Prakash, Ohanga, M. O. |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Dissertation |
| Format | 1 online resource (139 leaves) : illustrations (some color) |
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