Meter search method based on DL/T 645 standard

Abstract

The invention discloses a meter search method based on the DL/T 645 standard, related to a collection method. At present, when a new electric energy meter appears, the efficiency of the search meters is greatly affected caused by the existence of the original electric energy meters when the automatic meter search is executed. The meter search method based on the DL/T 645 standard comprises the following steps: 1) a concentrator communicates with an intelligent electric energy meter; 2) the intelligent electric energy meter judges whether any messages corresponding to the address of the concentrator sent by the concentrator is received in a set time after receiving the contraction addressing message of the concentrator; if so, does not respond to the contraction addressing message; otherwise, responds to the contraction addressing message and sends the address information; and 3) the concentrator stores the received address information of each intelligent electric energy meter, and actively reports to the main station of the collection system after generating an address file of the electric energy meters on the RS-485 line. By means of the meter search method based on the DL/T 645 standard, the meter search efficiency in the case of an incremental electric energy meter is greatly improved.

Description

technical field [0001] The invention relates to a collection method, in particular to a table search method based on the DL / T 645 protocol standard. Background technique [0002] In the power consumption information collection system of the power company, the concentrator communicates with the smart energy meter through the DL / T 645 protocol standard. According to the content of the DL / T 645 protocol standard system, the physical electrical interface adopts the half-duplex RS-485 standard Serial bus electrical interface, and the half-duplex communication mode of master-slave structure is specified on the data link layer, in which the concentrator is the master station, and the smart energy meter is the slave station. Each smart energy meter has its own unique Communication address coding, according to the different application conditions on site, the number of energy meters that can be connected to each RS-485 bus can reach up to 100. In the application site of the power com...

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Problems solved by technology

[0002] In the power consumption information collection system of the power company, the concentrator communicates with the smart energy meter through the DL / T 645 protocol standard. According to the content of the DL / T 645 protocol standard system, the physical electrical interface adopts the half-duplex RS-485 standard Serial bus electrical interface, and the half-duplex communication mode of master-slave structure is specified on the data link layer, in which the concentrator is the master station, and the smart energy meter is the slave station. Each smart energy meter has its own unique Communication address coding, according to the different application conditions on site, the number of energy meters that can be connected to each RS-485 bus can reach up to 100. In the application site of the power company, in order to facilitate installation and maintenance, the concentrator is generally required to have an automatic The meter search function, that is, the concentrator automatically searches the address of the electric energy meter on its RS-485 line, forms a file and actively reports it to the master station of the acquisition system. This method is relatively efficient when the device is first installed to search the meter. In addition to the situation of newly added electric energy meters, when performing automatic meter search, the existence of the original electric energy meters will greatly affect the efficiency of search meters, so a method is needed to improve the efficiency of this incremental electric energy meter. Search efficiency

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