Method for reading three-charge rate and four-charge rate electrical energy meter of low voltage carrier wave meter reading collection terminal

Abstract

The invention relates to a method for reading a three-rate electric energy meter and a four-rate electric energy meter by the collecting terminal of a low-pressure carrier wave reading meter. The method is characterized in that the electric energy meter receives a 901F instruction emitted from the collecting terminal and returns the 901F instruction to a data frame of the collecting terminal; firstly, the collecting terminal reads L and former data; according to the size of L, the electric energy meter is judged to be the three-rate meter or the four-rate meter; subsequently, according to the judgment on the three-rate meter or the four-rate meter, the collecting terminal is correspondingly provided with different collecting forms of the three-rate meter or the four-rate meter on subsequent data of L, thereby rightly resolving the returned data of electric energy. The method is applied in order that the collecting terminal only needs to produce according to the same specification model and is greatly convenient for production management. When the collecting terminal is mounted on the spot, only one collecting terminal is arranged in one electricity meter box and can read the three-rate meter electric energy meter and the four-rate meter electric energy meter, thereby reducing use cost.

Description

technical field [0001] The invention relates to a method for reading electric energy meters through a remote low-voltage carrier meter reading system acquisition terminal, more specifically, a method for compatible reading three-rate electric energy meters and four-rate electric energy meters. Background technique [0002] The acquisition terminal in the low-voltage carrier meter reading system is used to read the indication of the electric energy meter. In order to improve efficiency, it is generally implemented by using the data identifier "901F" for reading the positive active data set in "DL / T645-1997 Multi-function Electric Energy Meter Communication Protocol". [0003] In the "DL / T645-1997 Communication Protocol for Multifunctional Energy Meters", the data frame sent by the acquisition terminal to the energy meter is: [0004] FE FE 68H A0 A1 A2 A3 A4 A5 68H C L D0 D1 CS 16H. [0005] Among them, "FE" is the leading character, the first "68H" is the frame start chara...

AI Technical Summary

Problems solved by technology

Although, under normal circumstances, one collection terminal can read 64 electric energy meters, but when installing the centralized reading system, it is also necessary to select and install the corresponding collection terminal according to the type of electric meter. If two types of electric energy meters are installed in one electric meter box, It is necessary to install two types of collection terminals, thereby increasing equipment usage and increasing costs