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Related standards use the physical layer e. Accept and continue Learn more about the cookies we use and how to change your settings. The standard’s low speed is caused by the limited number of bits per power line cycle. One tone is chosen for mark i. List of International Electrotechnical Commission standards. Take the smart route to manage medical device compliance. Verteilungsautomatisierung mit Hilfe von Traegersystemen auf Verteilungsleitungen.
Please download Chrome or Firefox or view our browser tips. Search all products by. Your basket is empty. Retrieved from ” https: Click to learn more. The first four bytes of each packet are a preamble to measure the channel’s current condition.
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The tones are chosen by utilities, not specified in the standard. The silence and the preamble allow the receiver’s signal processing to measure the channel’s noise ratios. The system should be able to adjust the receiving method on each byte packet. 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 high reliability comes from its reliable timing system i. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or 6134-6 3. The standard permits each zero-crossing to convey 1, 2, 4 or 8 bits, with increased sensitivity to timing as the number of bits increases. Learn more about the cookies we use and how to change your settings. The higher link-layer strongly resembles HDLCexcept with a novel feature that allows selected stations to retransmit messages.
You may find similar items within these categories by selecting from the choices below:. Electric power distribution, Electric power transmission, Electric power distribution lines, 61334-6 transmission, Electric power transmission networks, Electric power networks, Jec control systems, Control systems, Coding data conversionCodes, Data handling, Data syntax, Data transfer. Views Read Edit View history. Wide area networks Networking standards. The most significant bits are sent first, unlike a conventional serial port.
In multiphase power lines, a separate signal might be sent on each phase to speed up the transmission. The bytes from the low-layer packets are reformed into bytes for the higher layers.
BS EN 61334-6:2001, IEC 61334-6:2000
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.
The physical layer synchronizes a small packet of tones to the zero-crossing of the power line’s voltage. The data from zero crossings should be collected into 8-bit bytes.
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 still recover all the data from the other frequency. 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 only, or the space tones 613346. For example, it lets a central controller read a unit’s signal 61334–6 noise ratios, and set the bit that enables a station to retransmit weak iev.
From Wikipedia, the free encyclopedia. A-XDR encoding rule Status: