http://automatipedia.org/mediawiki/index.php?title=Foundation_Fieldbus_H1&feed=atom&action=historyFoundation Fieldbus H1 - Revision history2024-03-28T23:10:48ZRevision history for this page on the wikiMediaWiki 1.16.0http://automatipedia.org/mediawiki/index.php?title=Foundation_Fieldbus_H1&diff=351&oldid=prevAdmin at 04:55, 2 December 20102010-12-02T04:55:56Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Industrial_computing]] [[Category:Production_and_manufacturing]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Industrial_computing]] [[Category:Production_and_manufacturing]]</div></td></tr>
</table>Adminhttp://automatipedia.org/mediawiki/index.php?title=Foundation_Fieldbus_H1&diff=350&oldid=prevAdmin: Created page with "{{Infobox Fieldbus Protocol | Name = Foundation Fieldbus H1 | Type_of_Network = Process Control | Physical_Media = Twisted Pair, fiber | Network_Topology = Star, Bus | Maximum_De..."2010-12-02T04:53:24Z<p>Created page with "{{Infobox Fieldbus Protocol | Name = Foundation Fieldbus H1 | Type_of_Network = Process Control | Physical_Media = Twisted Pair, fiber | Network_Topology = Star, Bus | Maximum_De..."</p>
<p><b>New page</b></p><div>{{Infobox Fieldbus Protocol<br />
| Name = Foundation Fieldbus H1<br />
| Type_of_Network = Process Control<br />
| Physical_Media = Twisted Pair, fiber<br />
| Network_Topology = Star, Bus<br />
| Maximum_Devices = 32 nodes/segment<br />
| Maximum_Distance = 9500 meters with 4 repeaters(depending on minimum signal strength and power to reach the field devices)<br />
| Device_Addressing = Automatic when connected to segment<br />
| Governing_Body = [[Fieldbus Foundation]]<br />
| URL = [http://www.fieldbus.org www.fieldbus.org]<br />
}} <br />
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== Description ==<br />
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'''Foundation Fieldbus H1''' is one of the [[FOUNDATION fieldbus|Foundation Fieldbus]] protocol versions. It utilises either twisted pair, or fiber media to communicate between multiple nodes (devices) and the controller. The controller requires only one communication point to communicate with up to 32 nodes, this is a drastic improvement over the standard 4-20mA communication method which required a separate communication point for each communication device on the controller system. <br />
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The Foundation Fieldbus H1 has support for [[Intrinsically safe|Intrinsically Safe Wiring]] with 4-6 devices per repeated segment depending on power requirements and other parameters. <br />
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The original concept was to connect as many as can be in forming a node,but limited by signal strength. <br />
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There is another level of protocol called HSE (for High-Speed Ethernet), catering to level 2 automation hierarchy. <br />
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== Parameters ==<br />
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The communication line can stretch 1900 meters without repeaters or 9500 meters with up to 4 allowed repeaters. <br />
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== Communication Methods ==<br />
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The communication methods supported are: <br />
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*Client/Server <br />
*Publisher/Subscriber <br />
*Event <br />
*Scheduled/Unscheduled<br />
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== Use ==<br />
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This protocol is primarily used for analog and discrete process control devices.The primary advantage is configuration by functional block concept. <br />
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== Power Supply ==<br />
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The big advantage of Foundation Fieldbus is that it allows power to be transferred over the communication bus to the controlled devices, this requires a Foundation Fieldbus power supply. <br />
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== Termination ==<br />
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The communication bus for this protocol requires two terminators (one near each end of the bus) in order to prevent signal reflections. <br />
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== Development ==<br />
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This protocol was developed and is supported by [[Fieldbus Foundation]] <br />
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== References ==<br />
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[http://www.fieldbus.org/ http://www.fieldbus.org/] <br />
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[http://www.topworx.com/networx/ff.html http://www.topworx.com/networx/ff.html] <br />
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{{Compu-network-stub}} <br />
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[[Category:Industrial_computing]] [[Category:Production_and_manufacturing]]</div>Admin