前一个练习的笔记在办公室计算机上没有写完，办公室的虚拟机上练习操作也没有做完。这里新开一篇，对ABB官网上关于AC800M控制器的一些介绍做一下学习。犹豫观望上大量资料是英文版，边学边自己翻译，可能会有词不达意或者错误的地方，后续发现了会逐步修改过来。
此篇文章的网址是：
AC 800M 控制器 - 控制 & I/O (800xA DCS) | ABB
The AC 800M controller is a family of rail-mounted modules, consisting of CPUs, communication modules, power supply modules and various accessories. Several CPU modules are available that vary in terms of processing power, memory size, SIL-rating, and redundancy support.
AC 800N控制器是导轨安装的一系列模块，包括CPU、通讯模板、供电模板和各种附件。几款CPU提供一下方面的差别：处理能力、存储大小、SIL等级和冗余的支持。
Each CPU module is equipped with two Ethernet ports for communication with other controllers and for interaction with operators, engineers, managers, and higher level applications. A Flash memory card can be inserted into a slot in the CPU module to stor
此篇文章的网址是：
AC 800M 控制器 - 控制 & I/O (800xA DCS) | ABB
The AC 800M controller is a family of rail-mounted modules, consisting of CPUs, communication modules, power supply modules and various accessories. Several CPU modules are available that vary in terms of processing power, memory size, SIL-rating, and redundancy support.
AC 800N控制器是导轨安装的一系列模块，包括CPU、通讯模板、供电模板和各种附件。几款CPU提供一下方面的差别：处理能力、存储大小、SIL等级和冗余的支持。
Each CPU module is equipped with two Ethernet ports for communication with other controllers and for interaction with operators, engineers, managers, and higher level applications. A Flash memory card can be inserted into a slot in the CPU module to stor