Siemens AG 2000. All rights reserved. Information and Training Center Knowledge for Automation 硬件组态和存储器概念

Siemens AG 2000. All rights reserved. Information and Training Center Knowledge for Automation 程序结构 STEP 7为设计程序提供三种方法。基于这些方法，可以选择最适合于你的应用的程序设计方法

SIMATIC S7 Siemens AG 2000. All rights reserved. Information and Training Center Know ledge for Automation PLC 的硬件安装和维护

Pre-reading activity Background Information Let-in Activity

Ⅰ. Background Information 1. Richard Wagner (1813-1883), the greatest composer of German opera, made a major addition to the nature of opera through his writings about and the creation of music drama. Music drama combines singing, orchestra, verse, story, drama and spectacle. Wagner's works include the \The Ring of the Nibelung\ (1853-1874), a set of four operas based on historical German stories. For an introduction to Wagner as well as other resources on the Internet, please visit

Activities 1. Global Reading Task • Scanning: reading for specific information • Answer the questions on page 9 to get the main idea of the text. • Text structure analysis

Warming-up Activities Group work Questions for thought and discussion Background information Enriching your vocabulary Comparing the following words

A bottom-up parser uses an explicit stack to perform a parse – The parsing stack contains tokens, nonterminals as well as some extra state information – The stack is empty at the beginning of a bottom-up parse, and will contain the start symbol at the end of a successful parse

Generate executable code for a target machine that is a faithful representation of the semantics of the source code Depends not only on the characteristics of the source language but also on detailed information about the target architecture, the structure of the runtime environment, and the operating system running on the target machine

普通信号的运算 信号间的运算 奇异信号的特殊运算 卷积积分 相乘 相加 平移 展缩 翻转 抽样 平移 展缩 翻转（奇偶性） 求导 积分