The M-Bus protocol is a standard protocol for reading of counter devices like Heating or Electrical energy counters. M-Bus is normalized as EN 1434-3. Many counter manufacturers have implemented the M-Bus protocol in their products.

IEEE69节点潮流计算程序，包括节点数据，支路数据和发电机数据。(MATLAB, case69.m, include bus data, branch data and generator data.)