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	PLC- Programmable Logic Controller
		These are typically interpreted as integer values by the PLC, with various ranges of accuracy depending on the device and the number of bits available to store the data.
		PLCs programs are generally written in a special application on a personal computer then downloaded over a custom cable to the PLC.
		Modern PLCs can be programmed in a variety of ways, from ladder logic to more traditional programming languages such as BASIC and C. Another method is State Logic, a Very High Level Programming Language designed to program PLCs based on State Transition Diagrams.
	thermometer-thermocouple.info /PLC.htm (513 words)

	Programmable logic controller - Wikipedia, the free encyclopedia
		The input/output arrangements may be built into a simple PLC, or the PLC may have external I/O modules attached to a proprietary computer network that plugs into the PLC.
		PLCs were invented as less-expensive replacements for older automated systems that would use hundreds or thousands of relays and cam timers.
		The load cell is connected to one of the PLC's analog inputs and the rate valve is connected to one of the PLC's analog outputs.
	en.wikipedia.org /wiki/Programmable_logic_controller (1753 words)

	Power line communication - Wikipedia, the free encyclopedia
		For example, a protection relay can use a PLC channel to trip a line if a fault is detected between its two terminals, but to leave the line in operation if the fault is elsewhere on the system.
		PLC modems transmit in medium and high frequency (1.6 to 30 MHz electric carrier).
		OPERA (Open PLC European Research Alliance) is a RandD Project with funding from the European Commission.
	en.wikipedia.org /wiki/Power_line_communication (2997 words)

	PLC/CARE: About
		That same year, the PLC Program and the Children's Hospital at Strong were one of six pediatric residency programs nationwide awarded a multi-million dollar grant from the Dyson Foundation to promote pediatric training in the community.
		Seventy-one percent of entering residents in 2002 and 2003 indicated that PLC was important to very important in their choice to train in Rochester; Twenty-one percent indicated it was the most important reason they chose to train in Rochester.
		The ultimate goal of the PLC program is to nurture a new generation of pediatricians who will have the knowledge and skills necessary to improve the health of children on a community level.
	www.plccare.org /about.html (1154 words)

	About PLC (Site not responding. Last check: 2007-10-26)
		PLC refers to a variety of broadband services provided over the electricity grid, such as High Speed Internet, telephony, AMR and home networking.
		PLC enables power utilities telecom operators to offer their customers solid business services such as High Speed Internet, telephony and additional services.
		PLC enables power utilities to build their market position by enhancing their corporate image as an innovator and trendsetter in the latest broadband communication services.
	www.mainnet-plc.com /about_plc.htm (260 words)

	Programmable Logic Controller PLC PC tutorial training factory industrial manufacturing laboratory automation systems
		The most common architecture we prefer is a PLC to do the real-time control and monitoring with Visual Basic or C# as the operator interface.
		PLC programming is not something that we do only a few times a year -- it is something we do all year.
		PLC Tutorial -- This tutorial contains several pages on what PLCs are good at, what they are not good at, what the major components are, and our views on how they should be used.
	www.htservices.com /Tools/PLC (752 words)

	PLC Main Page
		PLC purchased this conservation easement on the farm in a bargain sale; the Tate Family donated a portion of the easement and the North Carolina Department of Agriculture’s Farmland Preservation Program provided the remainder of the funding for the purchase.
		PLC now holds two conservation easements on Goat Lady Dairy, which permanently protect 36 acres, including pastureland, the site of the goat milking barn and cheese making facility, and 13 acres of wooded buffers along the property’s streams.
		PLC’s protection of 10,000 acres is the direct result of a small group of founders who came together out of a shared desire to protect our natural environment — assets like clean water, scenic vistas, and green parks and trails — through the establishment of a land trust.
	www.piedmontland.org /newevents/events.html (1732 words)

	PLC
		The VersaMax Nano PLC is a palm-sized, high compact controller with an all-in-one construction that saves panel space.
		The Micro PLC is a small footprint controller that provides a great many features and benefits: 14 point and 28 point controllers (expandable to 140 I/O) points, fast cycle times, robust instruction set, and extensive memory enabling flexible programming.
		Both PLCs are equipped with built-in high-speed counters that can be used in either type A (Up or Down, Independent Pulse), or type B (Both Directions, A QUAD B Encoder Inputs) configurations.
	www.vsasautomation.com /g_plc.htm (1202 words)

	Adept Software - PLC (Site not responding. Last check: 2007-10-26)
		The PLC library is available as freeware, and the complete source code to PLC Pro may be licensed for a nominal fee.
		PLC Pro is an inexpensive solution for software companies in need of a simple, powerful language tool.
		The complete PLC Pro source code may be licensed and modified to expand functionality, add new data types and language commands, or port to different operating systems.
	www.adeptsoftware.com /plc (152 words)

	Ladder Logic
		The input devices are individually wired to the input terminals of the PLC and the controlled components are individually wired to the output terminals.
		PLCs build the programs in what are referred to as networks.
		The last thing I would like to cover concerns the I/O. The PLC reads and writes to a bus where many different modules are attached.
	www.seattlerobotics.org /encoder/may97/ladder1.htm (1305 words)

	Your Personal PLC Tutor - Learn PLC Programming Here. FREE
		Get unbiased plc information not geared to any particular manufacturer.
		Your Personal PLC Tutor is here to help...
		Your Personal PLC Tutor site will be kept generic in nature and not geared to any particular manufacturer.
	www.plcs.net (368 words)

	Powerline-PLC.INFO
		PLC is the abbreviation for "Powerline Communication" and means data communications via the mains wiring.
		The existing 230Volt (110V) mains network is used to distribute internet connectivity to households or within a house...
		Many users are sharing one PLC node, so download speed is reduced and data security is a problem.
	www.powerline-plc.info /index_en.html (123 words)

	PLC
		Entertron began operations in 1978 and was the first company to offer a board level PLC and the second entry into the small/micro end of the PLC world, behind Modicon's 084.
		PLC MONITORING Writes and read all the operators of the PLC with your Palm or PDA, like a timers, counters, contacts, internal contacts and all the operators that has a specific PLC.
		Writes values and state on the PLC for all the operators and read the state of the PLC.
	www.plcautomations.com /plc_links.htm (2003 words)

	What is PLC? - A Word Definition From the Webopedia Computer Dictionary
		Medium voltage, typically ranging in the tens of thousands of volts, is what a utility substation will bring to a transformer, and the transformer will reduce the voltage into the low range before sending the electricity into a building.
		It is the low and medium voltages that PLC takes advantage of in order to transmit data at Ethernet-like speeds.
		PLC has applications in expansive networking, such as MANs or CANs, and smaller networking architectures, such as LANs and home networking.
	www.webopedia.com /TERM/P/PLC.html (405 words)

	PLC Sources Presented at Entertron.com - Providing Solutions to OEMs since 1978 (Site not responding. Last check: 2007-10-26)
		Entertron PLC provides all the PLC capability of a name brand and the look of a custom circuit board.
		A board level PLC will improve your chances of additional business from your customer after the sale of your product.
		Terms such as lonworks to modbus communicator, companies of programmable logic controller, plc sink source powered, dynapar plc, and plc trainer simulator are also related.
	www.entertron.com /plc_f.html (377 words)

	PLC (Site not responding. Last check: 2007-10-26)
		This PLC course aims to enable maintenance personnel to be able to understand the PLC program, make minor modifications to the program and to fault find quickly using both software and printouts.
		This PLC training course is aimed at personnel who already have some general experience of PLC’s but who wish to learn the idiosyncrasies of a specific model, or modify and expand existing programme codes.
		The following areas are designed to allow personnel to quickly determine the locations of faults on a PLC controlled plant, to develop their own programmes, and to monitor and fault find plant operation on both stand alone and networked systems.
	www.techniquetraining.co.uk /plc.htm (348 words)

	PLC authors (Site not responding. Last check: 2007-10-26)
		In 1883, she was sent as a boarding student to PLC where she was an outstanding student, excelling in music.
		The getting of wisdom (1910) - From the age of 13 to 17 she was a boarder at PLC, an experience she drew on for this novel, although unlike its heroine, she won distinction there as, especially as a musician.
		A copy of this book was presented to the PLC library by Ida and Annie in 1916.
	www.plc.vic.edu.au /Library/Literature/authors.htm (1650 words)

	BES PLC
		Those who visit the Building Environmental Services Plc Web Site from other locations do so at their own risk, and are responsible for compliance with all applicable laws relating to their use of the Building Environmental Services Plc Web Site and material contained on it.
		In this case, the disclosure of information may be required if Building Environmental Services Plc is compelled or authorised to do so by Legal Authorities or if there is a reasonable belief that there is a threat to an individual's life or health.
		Building Environmental Services Plc is committed to maintaining the security of data collected and protecting it from loss, misuse or alteration.
	www.bes-plc.co.uk /legal.cfm (2742 words)

	PLC Training Products, Programmable Logic Controller Software
		The realistic control systems include both electro-mechanical motor control as well as PLC control.
		Bookmarking is also included making it easy for a student to return to the last lesson that they studied.
		This "virtual PLC" environment or PLC Simulator, allows the learner to apply the knowledge gained in The PLCTrainer without the expense of purchasing RSLogix or even a PLC.
	electrical-contractor.net /The_Store/PLC_Products.htm?source=google (356 words)

	Siemens Energy & Automation
		The SIMATIC S7-300 is a modular PLC platform that is optimized for high performance machine and factory automation
		The SIMATIC S7-200 Micro PLC is a full featured, programmable logic control system offering stand-alone CPU's, micro-modular expansion capability, and cost effective HMI solutions.
		The new generation is here with expanded functionalities, double the memory capacity and trend-setting optimized utilization of memory.
	www.sea.siemens.com /automat/product/plc/auov.html (301 words)

	Controllers Overview - Product Information (Site not responding. Last check: 2007-10-26)
		The Ideal Solution for Demanding Applications The Series 90-70 family of controllers is designed to meet the most complex applications, such as advanced batch processing, triple modular redundancy, high-speed processing, and those requiring large numbers of I/O and large amounts of process memory.
		With an Intel processor, the OCS controller delivers mid-sized PLC performance at a fraction of the cost.
		Its fully integrated, tested, and industrially hardened hardware and software provides reduced wiring and installation time; faster set-up and programming; reduced panel space; and integrated high-speed networking.
	www.geindustrial.com /cwc/products?pnlid=2&id=ctrlov (390 words)

	Informa Plc - Home (Site not responding. Last check: 2007-10-26)
		Informa plc is the leading provider of specialist information to the global academic and scientific, professional and commercial communities via publishing, events and performance improvement.
		Choose from over 10,000 events and training courses, 40,000 book titles, over 2,000 subscription-based services including academic journals, magazines, newsletters, real-time information and news services, unparalleled performance improvement solutions, hundreds of exceptional brands and 70 countries.
		REG-Gartmore Investment Management Ltd: Rule 8.3 - Informa plc
	www.informa.com (194 words)

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