DLMS BLUE BOOK PDF FREE DOWNLOAD

This page was last edited on 13 June , at From Wikipedia, the free encyclopedia. Next, the meter informs the handheld unit about the various parameters that are available with it in various security settings viz. Any real-world thing mapped to an appropriate class type can be described by the attributes defined in the standard, and the methods defined therewith allow operations to be performed on the attributes. Use British English Oxford spelling from December The physical media are usually either modulated light, sent with an LED and received with a photodiode , or a pair of wires, usually modulated by a 20mA current loop. dlms blue book pdf

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The handheld unit then sends a sign-off message. It is one part of the identification of the object. The following exchange usually takes a second or two, and occurs when a person from the utility company presses a meter-reading gun against a transparent faceplate on the meter, or plugs into the metering bus at the mailbox of an apartment building.

During sign-on, the handheld unit addresses a particular meter by number. If no sign-off message is sent, the meter automatically signs off after a previously negotiated time interval after the last message.

Any real-world thing mapped to an appropriate class type can be described by the attributes defined in the standard, and the methods defined therewith allow operations to be performed on the attributes. Next, the meter informs the handheld unit about the various parameters that are available with it in various security settings viz.

The meter and hand-held unit negotiate various parameters such as the maximum frame length during transmission and reception, whether multiple frames can be sent without acknowledging individual frames windowingthe fastest communication rate that they can both manage only in case of mode E switching to HDLC etc.

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After signing on, the handheld unit generally reads a meter description. If the parameter required is in the no-security group, just a get. This describes some registers dlmz describe the current count of metered units i. If the password exchange is correct, the meter accepts the handheld unit: From Wikipedia, the free encyclopedia.

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Conventionally, the first attribute in an object is the logical name, also defined as the OBIS code in case of LN referencing. The general protocol consists of a "sign on" sequence, in which a handheld unit identifies itself to the metering unit. The handheld unit must return an encrypted password.

Occasionally a manufacturer will define a new quantity to measure, and in this case, a new or different data type will appear in the meter definition.

List of International Electrotechnical Commission standards. By using this site, you agree to the Terms of Use and Privacy Policy. Views Read Edit View history. Use British English Oxford spelling from December Retrieved from " https: The physical media are usually either modulated light, sent with an LED and received with a photodiodeor a pair of wires, usually modulated by a 20mA current loop. IEC or currently IECwas an international standard for a computer protocol to read utility meters.

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In case of high-security parameters, the meter challenges the handheld unit with a cryptographic boo. It is designed to operate over any media, including the Internet. The protocol is usually half-duplex. Most metering units have special modes for calibration and resetting meter registers.