Here is the synopsis of our sample research paper on The Programmable Logic Controller. Have the paper e-mailed to you 24/7/365.
Essay / Research Paper Abstract
A 5 page paper discussing the PLC and its role in manufacturing process control. In an age of increasing numbers of technological advances, there are few manufacturing process control devices that can be said to be as valuable today as when they first became widely used, but the PLC qualifies for the distinction. The key to its continued success could well lie with its simplicity, a factor that designers need to preserve. The single focus of the PLC makes it difficult to integrate into corporate intranets, and designed redundancy diminishes the simplicity that keeps it so highly functional. Bibliography lists 5 sources.
Page Count:
5 pages (~225 words per page)
File: CC6_KS-PLC.doc
Buy This Term Paper »
Unformatted sample text from the term paper:
residues of previous steps. Some connections cannot be made to be reliable after some of the chemical treatments the boards receive, however. For those locations on the circuit
board, a mask resembling silicon caulk is applied. The mask protects the surface of the circuit board from upcoming abuses and is removed when the board reaches the stage
of construction that assemblers are able to install the connections so sensitive to surface conditions. Automated mask applier is much faster and much
more cost efficient than would be a human applier of masking compound. Additionally, the machine version misses no crucial spots if it is fully operational and has been programmed
correctly. The programmable logic controller (PLC) provides the perfect solution in this application where uniformity is crucial but variability also is required for other circuit board designs. "PLC microprocessors
are typically RISC-based and are designed for high-speed, realtime and rugged industrial environments" (Anonymous, 1998; PG). Shaw (1999) writes that in choosing a
method of automation for process control that PLC "is king of machine control while the distributed control system (DCS) dominates process control. If you manufacture plastic widgets, you speak PLC.
If you produce chemicals, you speak DCS" (p. 56). There was greater distinction between the two a decade ago, but they each increasingly resemble each other so that the
distinctions between them appear to blur. "However, PLCs still dominate high-speed machine control, and DCSs prevail in complex continuous processes" (Shaw, 1999; p. 56).
Years ago, PLCs were little more than replacements for hard-wired relays. They "had only digital I/O, with no operator interface or communications. Simple operator interfaces appeared, then
...