IEC101协议的学习笔记，也可以算是IEC101标准协议5部分的导读，主要写了每部分的重点和个人的理解，可以当做阅读协议之外的小总结。-IEC101 study notes, can also be regarded as the 5 part of the introduction of IEC101 standard protocol, mainly to write a personal key and each part of the understanding, can be used as a small sum reading outside the agreement.