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The physical layer synchronizes a small packet of tones to the zero-crossing of the power line’s voltage. You may experience issues viewing this site in Internet Explorer 9, 10 or List of International Electrotechnical Commission standards.
Idc the smart route to manage medical device compliance. IECknown as Distribution automation using distribution line carrier systemsis a standard for low-speed reliable power line communications by electricity meterswater meters and SCADA. The standard’s low speed is iev by the limited number of bits per power line cycle.
The frequencies are placed far enough apart that frequency-selective fading and narrow-band interference only blocks one of the frequencies, so the receiver can idc recover all the data from the other frequency.
The standard permits each zero-crossing to convey 1, 2, 4 or 8 bits, with increased sensitivity to timing as the number of bits 6134-6. The higher link-layer strongly resembles HDLCexcept with a novel feature that allows selected stations to retransmit messages.
Automatisation de la distribution a 613344-6 de systemes de communication a courants porteurs. Electric power distribution, Electric power transmission, Electric power distribution lines, Data transmission, Electric power transmission networks, Electric power networks, Automatic control systems, Control systems, Coding data conversionCodes, Data handling, Data syntax, Data transfer.
The tones are chosen by utilities, ifc specified in the standard. Views Read Edit View history. You may find similar items within these categories by selecting from the choices below:.
IEC – MediaWiki
BS EN 61334-6:2001, IEC 61334-6:2000
Your basket is empty. This page was last edited on 30 Marchat Depending on the signal to noise ratios, the bits can be recovered from the difference between the power of the mark and space tones, the power of the mark tones ied, or the space tones only.
Verteilungsautomatisierung mit Hilfe von Traegersystemen auf Verteilungsleitungen.
The faster, easier way to work with standards. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Click to learn more. S-FSK spread frequency-shift keying is a modulation scheme that combines some of the advantages of classical spread-spectrum modulation immunity against narrow-band interference with some of the advantages of classical frequency-shift keying FSK 613346- low complexity.
The first four bytes of each packet are a preamble to measure the channel’s current condition. It is actually a series of standards describing the researched physical environment of power lines, a well-adapted physical layer, a workable low-power media access layer, and a management interface.
For example, it lets a central controller read a unit’s signal to noise ratios, and set the bit that enables a station to retransmit weak stations.
One tone is chosen for mark i. Retrieved from ” https: Wide area networks Networking standards. This is followed by 38 bytes of data, and 3 byte-times of silence. The system should be able to adjust the receiving method on each byte packet. The most significant bits are sent first, unlike a conventional serial port.
The high reliability iecc from its reliable timing system i.