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Topic: Distributed Control System

	Git - Fast Version Control System
		Git is a popular version control system designed to handle very large projects with speed and efficiency; it is used mainly for various open source projects, most notably the Linux kernel.
		Git is distributed version control system focused on speed, effectivity and real-world usability on large projects.
		Like most other modern version control systems, Git gives each developer a local copy of the entire development history, and changes are copied from one such repository to another.
	git.or.cz (1127 words)

	Distributed control system - Wikipedia, the free encyclopedia
		A distributed control system (DCS) refers to a control system usually of a manufacturing system or process, in which the controller element is not central in location (like the brain) but are distributed throughout the system with each component sub-system under the control of one or more controllers.
		Distributed control systems (DCS) are used in industrial and civil engineering applications to monitor and control distributed equipment with or without remote human intervention; the nomenclature for the former 'manual control' and the latter 'automated control'.
		Many of the older systems that were installed in the 1970s and 1980s are still in use today, and there is a considerable installed base of systems in the market that are approaching the end of their useful life.
	en.wikipedia.org /wiki/Distributed_control_system (1880 words)

	Distributed control system - Patent 4819149
		The process control system of claim 1 wherein each of said controllers includes a manual control means for controlling the output control signal of said controller manually and for inhibiting the output control signal generated by said calculating means.
		The distributed process control system of claim 17 wherein said communicating means integral with said condenser includes a means to identify a particular controller and a means to verify the integrity of said input communication bus and said output communication bus.
		The distributed process control system of claim 17 wherein said communicating means integral with said subhost means includes a means to selectively communicate with a specific condenser connected to said subhost.
	www.freepatentsonline.com /4819149.html (10818 words)

	Distributed control system - Patent 4173754
		Control signals generated by a microcomputer may be distributed to each switched fixture load in the system by transmission through the power distribution circuits (which are typically A.C.) in the facility or, in the alternative, through a communication circuit within the facility, on a frequency modulated carrier.
		If several systems are employed in a single building or other facility, overall control of the systems may be accomplished by a master microcomputer or by a central process control computer.
		In the case of a hierarchical system, a single, tone-encoded remote location address may be employed for all the receiver-decoders in any single remote subsystem 30, with the function code including, in a predetermined sequence, the specific functions to be carried out by each controlled apparatus 33 in subsystem 30.
	www.freepatentsonline.com /4173754.html (3723 words)

	Control system - Wikipedia, the free encyclopedia
		The term "control system" may be applied to the essentially manual controls that allow an operator to, for example, close and open a hydraulic press, where the logic requires that it cannot be moved unless safety guards are in place.
		In the case of linear feedback systems, a control loop, including sensors, control algorithms and actuators, is arranged in such a fashion as to try to regulate a variable at a setpoint or reference value.
		Control systems that include some sensing of the results they are trying to achieve are making use of feedback and so can, to some extent, adapt to varying circumstances.
	en.wikipedia.org /wiki/Control_system (2127 words)

	[No title]
		All controller configuration shall reside at the controller level in non-volatile memory such that the configuration shall be automatically down loaded into the controller, (upon failed card, or upon power up) and not require reloading from a highway resident console or disk.
		Controllers shall be capable of being replaced while the system is powered up, without requiring any other controllers in the system to be shut down.
		In addition, the system shall be capable of automatically documenting a subset of a controller's configuration, an entire controller's configuration, a group of controller configurations, or an entire system's configuration by specifying a queue of ranges.
	www.ogs.state.ny.us /dnc/masterspec/word/15913.doc (7454 words)

	THE PC-BASED DISTRIBUTED CONTROL SYSTEM SIMULATOR
		This paper is intended to provide faculty, who teach control system principals, with a conceptual approach to the design of a personal computer-based distributed control system simulator employing industry-grade components in lieu of prepackaged t rainers.
		Since the control system software establishes software and hardware platform requirements and is the heart of any di stributed control system, the most efficient design procedure begins with the selection of the control software or SCADA.
		To employ an existing controller with this type of network, in a distributed control system, a hardware interface must be installed in the host computer.
	et.nmsu.edu /~etti/spring98/computers/brown/brown.html (1033 words)

	HFC AFS-1000 Distributed Control System (Site not responding. Last check: 2007-10-23)
		Control cards are arranged with their respective input/output cards, and all cards are accessible and replaceable with the system online.
		Control cards are arranged with their respective Input/Output (I/O) cards, and all cards are accessible and replaceable with the system on-line.
		A specific input and output are tied to a single and unique controller, guaranteeing that critical control loops are monitored and controlled without interaction of other loops, Data integrity is assured because of unique error-checking and communications subroutines.
	www.hfcontrols.com /AFS.htm (566 words)

	HFC ECS-1200 Distributed Control System (Site not responding. Last check: 2007-10-23)
		A powerful, yet scalable system, with superior reliability and flexibility, the ECS-1200 distributed control system is the result of more than five decades of innovation and manufacturing of control systems in hundreds of installations around the world.
		The control system I/O modules are comprised of a complete family of digital and analog input and output boards.
		Each system can be connected to other computers and control systems on the network through the use of a standard Ethernet™ LAN and TCP/IP link.
	www.hfcontrols.com /ECS.htm (984 words)

	PAControl.com - Basic Process Control Systems
		The DCS is a control system which collects the data from the field and decides what to do with them.
		Systems traditionally associated with process control are being used in discrete applications.
		The Control Execution Environment (CEE) supports two types of containers: the Control Module in which continuous and discrete controls are combined; and an SCM, which is used for sequence control.
	www.pacontrol.com /DCSystem.html (1161 words)

	LWN: Bazaar-NG: a distributed version control system
		Bazaar-Ng is a next-generation version control system that is in the early stages of development.
		The tutorial shows some examples of the system in use, it also mentions some of the future commands that are planned for implementation.
		As older version control systems such as cvs show their age, quite a few alternatives are being developed.
	lwn.net /Articles/139903 (864 words)

	Distributed control (Site not responding. Last check: 2007-10-23)
		Portech identified distributed control using 32 on-board microcontrollers as giving them the most flexible solution to realise their business goals.
		Our role in the project was focused on enabling the vision of a complex distributed control system to become a reality.
		Once hardware and operating system selections were complete, we transferred system design skills to the University of Portsmouth to enable them to design a flexible software framework.
	www.it-innovation.soton.ac.uk /research/decision_control.shtml (342 words)

	Distributed Control System delivers PLC architecture., Invensys Systems, Inc. (Site not responding. Last check: 2007-10-23)
		The T2550 controller is the first product in the Foxboro A2 line to bundle full process control and I/O functionality in a compact, field-mountable baseplate and termination assembly.
		System controllers can be mixed and matched as needed to meet specific control and price requirements using the highly flexible licensing strategy.
		Control strategies are configured graphically using IEC-61131 tools including function block, sequential function charts, structured text, and PID and advanced regulatory control.
	news.thomasnet.com /fullstory/473046/rss (871 words)

	SIXNET Distributed Control Systems DCS
		Scalable Control Systems (SCS) are truly open DCS solutions that seamlessly integrate your choice of modular hardware and software components into completely open systems.
		We call these feature-rich Distributed Control Systems “Scalable Control Systems” to highlight the fact that SIXNET systems are pre-integrated solutions that grow gracefully from a few I/O points to plant-wide or even a global network.
		Asset management software monitors the performance of the SCS system itself, tracking assets by their location, performing calibrations and diagnostics and other valuable functions that let you manage your SCS as an integrated system.
	www.sixnetio.com /html_files/products_and_groups/dcs.htm (704 words)

	Distributed Control System Operator Simulation
		This system allows for the best of both worlds---full functionality of the operator station including use of actual plant configurations and translation of plant graphics as well as the full functionality of the AUDY training system (i.e., snapshot, backtrack, freeze, time scales, etc.).
		Applicable to the most popular control systems, the AUDY emulators contain all functional features needed for training operators.
		AUDY software emulates the displays of these operator stations enabling operators to be trained using the same standard operating procedures (SOPs) as on the real distributed control system.
	www.tridentusa.com /simulation/overview/index.html (460 words)

	(WO/1986/004740) PROCESSING SEQUENCE CALLS IN A DISTRIBUTED CONTROL SWITCHING SYSTEM (Site not responding. Last check: 2007-10-23)
		The control unit associated with the terminating port stores sequence call data defining whether calls are to be completed to that terminating port or are to be forwarded to another directory number.
		Upon determining that a given call is a sequence call, the control unit associated with the original terminating port determines the terminating port defined by the second directory number and effects a reduction of the sequence call to a simple call between the originating port and the second terminating port.
		In either case, the control unit associated with the second terminating port completes the call without knowing whether the call is a sequence call or a simple call completed to the original terminating port.
	www.wipo.int /pctdb/en/wo.jsp?WO=1986/04740 (333 words)

	Distributed Control System - DCS -- Control Systems International
		Like a traditional distributed control system, UCOS allows you to distribute control in multiple locations and creates sophisticated regulatory control schemes that require little or no programming.
		Unlike a traditional distributed control system, UCOS distributes control economically and creates regulatory control even more efficiently than with DCS function blocks.
		The next few pages describe the UCOS distributed control system architecture and regulatory control concepts in more detail.
	www.ucos.com /dcs.htm (102 words)

	eP's CAC CS7X Distributed Control System
		In a hierarchical system composed of a master unit and one or more slave units, CAN is utilized to link the slave units back to the master permitting functional isolation so that slave modules can be dedicated to critical applications.
		This assures that the control intelligence is distributed in the slave unit or “application modules” where the operation and control decisions need to be made.
		This allows the system to be used as a data router for multiple devices, eliminating the need for additional communication paths from a host to each device.
	www.ep-solutions.com /Solutions/CAC/Controllers_CAC_CS7X_Distributed_Control_Systems.html (0 words)

	Distributed Access Control System (DACS) -- Frequently Asked Questions
		Access control rules can make decisions based on the identity of the user making the service request, details about the service request, and the overall context in which the request is being made.
		For organizations and their system administrators to have confidence in a security system, they must understand how it works and have confidence in it.
		System administrators are required to upgrade software as necessary in response to security-related bugs.
	dacs.dss.ca /faq.html (7640 words)

	Distributed Control System Architecture -- Control Systems International
		The Field Control Unit (FCU) executes sequential and regulatory logic and directly scans I/O. Depending on the FCU's configuration, you can scan multiple brands of I/O from one unit.
		The FCU runs QNX, a real-time operating system, and is typically a PLC or a ruggedized industrial computer available in a variety of form factors.
		A local operator uses the color graphic Operator Workstation (OWS) to monitor and control the process, and the Field Control Unit (FCU) executes sequential and regulatory control logic.
	www.ucos.com /dcs2.htm (689 words)

	Distributed Control System includes asset management., Honeywell, Inc., Industrial (Site not responding. Last check: 2007-10-23)
		The Experion PKS system is used in industrial plants and mills to integrate, control and monitor complex processes in many types of industrial settings, including refineries, pharmaceuticals, power and chemical plants, and pulp, paper and printing mills.
		Distributed Control features provided by Experion PKS include a complete continuous, logic, sequential, and drive object-oriented control environment hosted on fully redundant controllers.
		Experion PKS goes beyond Distributed Control System (DCS) technology to facilitate knowledge sharing and workflow management that optimizes work processes, improves routine maintenance efficiencies, and resolves process issues.
	news.thomasnet.com /fullstory/9001/2586 (1584 words)

	DistributedSCM - Mercurial
		A distributed SCM tool is designed to support a model in which each Repository is loosely coupled to many others.
		Individual developers only need access to their own repositories, not to a central one, in order to Commit changes.
		Distributed SCMs provide mechanisms for propagating changes between repositories.
	www.selenic.com /mercurial/wiki/index.cgi/DistributedSCM (61 words)

	DISTRIBUTED CCTV CONTROL SYSTEM (Site not responding. Last check: 2007-10-23)
		A CCTV installation with large number of cameras geographically distributed over a large area requires very long lengths of cable not only for transmission of video signals but also for control of camera as well as for alarm monitoring.
		The Distributed CCTV control system consisting of a Master controller and multiple slave controllers helps in dispensing with the control cable totally by transmitting the control signals through the same cable which carries the video signal.
		Distributed CCTV Control System provides a cost effective solution for security surveillance of nuclear power plants, heavy water plants, reprocessing plants etc. It can be utilized for process monitoring in chemical process plants, steel plants and other such industries.
	www.barc.ernet.in /webpages/technologies/cctv.html (133 words)

	Distributed control system
		But couldnt understand what kind of redundancy are you looking for is it at the controller level if so then i would suggest that go for a honeywell plantscape r500 system its the best option for all kinds of redundancy and easy to use options.
		I have commissioned a redundant sytem both controllers and servers with 3000 I/O and the results were immaculate in all respects all kinds of programming and hmi options have helped me alot to commission critical process chemical plant.
		The power distribution in the DCS controller should also be looked into to make sure that there is not a single point of failure.
	www.control.com /1026170185/index_html (0 words)

	Maco EM-3 Extrusion Master Distributed Control System
		The DAServer Manager, which is installed as a Microsoft® Management Console interface as well as an AcrhestrA System Management Console plug-in, supports a wide variety of programmable logic controllers and protocols.
		With the EM-3, Eurotherm Controls and Barber-Colman Industrial Instruments have used proven MACO DS building blocks to create a standard implementation of an extrusion control system that is applicable to many extrusion processes.
		Standard control system definitions have been developed for Application Specific Blocks, which saves valuable engineering time and expense.
	www.eurotherm.com /products/systems/em3.htm (299 words)

	A low cost USB-CAN Distributed Motion Control System
		An extremely low cost, but high performance distributed motion control system is presented.
		One can use centralized controls with PC motion control cards, external amplifiers, and a tangle of wires, or utilize existing high cost distributed motion control system with RS485, Ethernet, or one of the fieldbuses (DeviceNet, CANOpen, Profibus, etc.).
		The system consists of two units (I/O expansion in the future); a USB-CAN converter and a dual axis controller.
	www.circuitcellar.com /flash2002/First/abstractM250.htm (609 words)

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