nour nabil

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nour nabil Aug 19, 2009, 9:39 am
very useful library...Thanks alot
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Redundancy Concepts

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
Using a redundant PROFIBUS system makes it possible to considerably increase the availability and thus the reliability in comparison with a single system. One particular advantage is scalable redundancy that begins with a redundant PROFIBUS transmission link, continues with a redundant master and en...
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Fieldbus Topology with RS485 (PROFIBUS DP)

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
Bus length and speedWhen a PROFIBUS network is installed, boundary conditions of the RS485 transfer technology must be observed. The electrical network uses a shielded, twisted pair cable. All subscribers are connected in a line-shaped bus. The transmission rate can be adjusted in steps from 9.6 kbi...
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RS485 cable type and speed

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
The maximum permissible bus length depends on the transmission rate and the bus cable type. Different cable types (designation A to D) for different applications are available for connecting PROFIBUS devices either each other or to network elements (Linking Devices, Repeaters). The electrical lines ...
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Profibus-evolution

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
Profibus-evolution
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Foundation Fieldbus

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
FOUNDATION™ fieldbus - the path to the future The Internet is having a major impact on information flows. Yesterday's hierarchical systems with vertical information flows are being replaced by systems that have a flatter structure and more diverse information flow patterns. In today's world, it is...
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Installing Fieldbus

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
Fieldbus (the use of digital communications networks for distributed instrumentation and control) is a wonderful technology with many benefits, but fieldbus installation requires some additional considerations over and above normal 4–20 mA projects. Don’t get hung up on which fieldbus to choose....
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Fieldbus News-Press Releases

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
FOUNDATION Fieldbus Developer Training To Be Offered During October In Austin, TexasVendor-neutral instruction covers key aspects of Foundation technology AUSTIN, Texas, August 18, 2009 – The Fieldbus Foundation today announced it will offer Foundationfieldbus developer training during October 200...
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Glossary List_1

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
TermDefinitionAcyclic PeriodThe Acyclic Period is that portion of the communication cycle time, during which information other than Publish/Subscribe data is transmitted. Typical information transmitted during this time includes Alarms/Events, Maintenance/Diagnostic Information, Program Invocations,...
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Glossary List_2

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
ermDefinitionLinkA Link is the logical medium by which H1 Fieldbus devices are interconnected. It is composed of one or more physical segments interconnected by bus Repeaters or Couplers. All of the devices on a link share a common schedule which is administered by that link's current LAS. Link Acti...
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Fieldbus Topologies

nour nabil posted an article on - Dec 31, 1969, 7:00 pm
Line TopologyWith this topology, the fieldbus cable is routed from device to device on this segment, and is interconnected at the terminals of each fieldbus device. Installations using this topology should use connectors or wiring practices such that disconnection of a single device is possible with...
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