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| 編輯推薦： |
1.适合高职高专S7-300 PLC课程的经典教材。
2.内容精练、深入浅出、适合入门级读者。
3.案例丰富、配有微课视频，实用性强。
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| 內容簡介： |
本书以工程实际应用和便于教学使用为出发点，以西门子 S7-300系列 PLC为蓝本，主要介绍可编程序控制器的工作原理、指令系统、程序结构、编程软件使用、编程规则与技巧、控制系统设计与应用技术等内容。
本书力求语言简捷、通俗易懂、实用性强、理论联系实际，通过大量工程案例介绍 PLC的设计方法。本书作为新形态教材，关键知识点处配有二维码扫描视频，且每章都有相关技能训练，以突出对实践技能和应用能力的培养。
本书适合作为电气自动化、楼宇智能化、机电一体化、机械设计与制造及其相关专业 “PLC基础与应用”课程的教学用书，也可作为电气技术人员的参考书和培训教材。
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| 關於作者： |
吴丽，黄河水利职业技术学院电气自动化方向，教授，从事高校教学及教学管理31年：讲授“电气控制与PLC” “PLC应用系统设计与安装” “电机与电气控制”等课程，指导学生实习、课程设计、毕业设计及顶岗实习等实践教学活动。。
（1）主编《电气控制与PLC应用技术》，2008年由机械工业出版社第1版出版发行后，连续印刷16次，于2014年和2018年修订出版发行了第2版，和第3版，3个版次的发行量达6.15万册。
（2）主编《西门子S7-300PLC基础与应用》，2011年3月由机械工业出版社出版，并在2015年8月发行了第2版，是国家首批示范建设院校重点专业电气自动化技术的《PLC应用系统设计与安装》课程的建设成果。
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| 目錄：
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第 1章 PLC的基本知识············································· 1
1.1 PLC概述 ········································ 1
1.1.1PLC的产生和定义 ································· 1
1.1.2PLC的结构组成 ···································· 1
1.1.3PLC的基本原理 ················ 3
1.1.4PLC的编程语言 ··································· 5
1.1.5PLC的应用和发展 ································· 7
1.2 S7-300 PLC概述 ········································ 8
1.2.1西门子 PLC系列产品 ···························· 8
1.2.2S7-300 PLC的硬件组成 ··· 11
1.2.3CPU的操作模式 ································· 13
1.2.4S7-300 PLC的工作过程 ················································· 14
1.2.5S7-300 PLC的模块安装 ················································· 16
1.2.6S7-300 PLC数字量信号模块的地址分配 ···································· 19
1.3习题 ························································· 20第 2 章 STEP 7编程软件 ····································· 21
2.1 STEP 7软件安装 ······································ 21
2.1.1安装需求 ············································ 21
2.1.2安装 STEP 7软件包 ··· 21
2.1.3STEP 7的授权管理 ··· 23
2.2 SIMATIC管理器 ··········· 24
2.2.1SIMATIC管理器概述 ·· 24
2.2.2STEP 7项目结构 ······· 25
2.2.3SIMATIC Manager自定义选项设置 ················ 25
2.2.4PGPC接口设置 ········ 27
2.3 技能训练电动机起 停控制 ·················· 28
2.3.1用继电器-接触器控制三相交流异步电动机起 停 · 28
2.3.2用 PLC控制三相交流异步电动机起 停 ······· 29
2.3.3PLC系统的硬件组态及程序编制 ········· 31
2.3.4方案调试 ··········· 40
2.4 PLC控制系统与其他控制系统的区别 ·· 42
2.4.1PLC控制与继电器-接触器控制的区别 ···· 422.4.2仿真 PLC与实际 PLC的区别 ··········· 43
2.4.3PLC系统的设计步骤 ················ 44
2.4.4PLC设计项目的下载 ················ 44
2.4.5TIA博途 ········ 45
2.5 习题······················· 45第 3 章 基本逻辑指令的应用 ································· 47
3.1指令基础 ·············································· 47
3.1.1指令的基本知识 ··························· 47
3.1.2寻址方式和累加器 ···························· 50
3.2 触点与线圈 ············ 52
3.3 基本逻辑指令 ····························· 53
3.3.1逻辑“与”指令 ··························· 53
3.3.2逻辑“或”指令 ············· 54
3.3.3逻辑“异或”指令 ························· 54
3.3.4逻辑块的操作 ······································· 55
3.3.5信号流取反指令 ······································· 56
3.4 边沿检测指令 ·············································· 56
3.4.1RLO的上升沿检测指令 ········································ 56
3.4.2RLO的下降沿检测指令 ···················································· 57
3.4.3触点信号的上升沿检测指令 ··········································· 58
3.4.4触点信号的下降沿检测指令 ············································ 59
3.5 技能训练电动机的基本控制 ·················································· 60
3.5.1PLC控制系统的硬件设计 ············································· 60
3.5.2PLC控制系统的软件设计 ·········································· 61
3.5.3方案调试 ··························································· 66
3.6习题 ········································································· 67 第 4 章 定时器的应用 ···························· ··································· 68
4.1定时器 ····························· ····················· 68
4.1.1定时器指令 ····························· ························· 68
4.1.2CPU的时钟存储器 ······························· ··········· 76
4.2技能训练人行横道控制 ······················· ········ 77
4.2.1控制要求 ······························ ··············· 77
4.2.2任务实施 ·································· ············ 78
4.2.3方案调试 ····························· ······················· 82
4.3编程注意事项 ······························· ······················ 85
4.3.1常闭输入触点的处理 ·········· ················· 85
4.3.2热继电器 FR与 PLC的连接 ·············· ········ 85
4.3.3定时器的扩展 ·········· ·················86
4.3.4编程规则 ·································· 87
4.4习题 ···································· 87第 5 章 置位与复位指令的应用 ··················································· 89
5.1 置位与复位 ········································································ 89
5.1.1置位与复位指令 ··························································· 89
5.1.2RS触发器指令与 SR触发器指令 ·························· 90
5.2 STEP 7的用户程序结构 ············································ 92
5.2.1STEP 7的程序块 ···················································· 92
5.2.2STEP 7的用户程序结构和调用 ·································· 94
5.3 技能训练 1 抢答器的控制 ······································ 96
5.3.1控制要求 ······································································ 96
5.3.2任务分析 ·············································· 96
5.3.3任务实施 ························
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| 內容試閱：
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可编程序控制器（简称为 PLC）是以微处理器为基础，综合了计算机技术、自动控制技术和通信技术发展起来的一种新型、通用的工业自动控制装置。它具有可靠 性高、配置扩充灵活等特点，且具有易于编程、使用维护方便等优点，因而广泛应用于工业自动化控制的各个领域，它代表着控制技术的发展方向，被称为现代工业自动化的三大支柱之一。
近年来，随着 PLC应用领域的日益扩大，新产品、新技术不断涌现，尤其是德国西门子公司的 SIMATIC S7系列 PLC，具有功能强、性价比高等优点，能为自动化控制应用提供安全可靠和比较完善的解决方案，深受用户的欢迎，特别适合当前工业企业对自动化的需要。
本书以工程实际应用和便于教学使用为出发点，以西门子 S7-300系列 PLC为蓝本，以工作任务为导向，基于工作过程的思维方式进行组织与编写，注重过程性知识的讲解，适度介绍概念和原理，突出技能训练和能力培养，力争使本书满足“教、学、练、做”一体化的教学需要。
本书共 10章，第 1章介绍 PLC的基本知识；第 2章介绍 STEP7编程软件的应用；第 3章介绍基本逻辑指令的应用；第 4章介绍 5种定时器及时钟存储器；第 5章介绍置位和复位指令的应用；第 6章介绍计数器的应用；第 7章介绍功能指令的应用；第 8章介绍模拟量信号的模块、模拟信号的处理和控制；第 9章介绍顺序控制系统、顺序功能图的结构、顺序功能图的梯形图编程方法、 S7 GRAPH语言；第 10章介绍相关的通信知识和应用。
本书力求语言简捷、通俗易懂、内容丰富、实用性强、理论联系实际，详细叙述了 PLC的应用技术，并通过大量工程案例介绍 PLC的设计方法。本书作为新形态教材，每章关键知识点处配有二维码扫描视频，且每章都有相关技能训练，以突出对实践技能和应用能力的培养。
本书配有授课电子课件、二维码微课视频、习题答案，可扫描本书封底“ IT”字样的二维码，输入本书书号的 5位数字（ 65586）获取下载链接。有样书、资源等问题可加微信号 jsj15910938545，或联系编辑索取（ QQ：1239258369，电话： 010-88379739）。
本书适合作为电气自动化、楼宇智能化、机电一体化、机械设计与制造及相关专业 “PLC基础与应用”课程的教学用书，也可作为电气技术人员的参考书和培训教材。
本书由黄河水利职业技术学院吴丽和何瑞担任主编，其中吴丽编写第 9章，何瑞编写第 2章、第 5章和第 10章。郑州电力职业技术学院刘华杰编写第 1章，邱全富编写第 3章，穆淑红编写第 4章，李叶编写第 6章，魏欢欢编写第 7章，许东艳编写第 8章。全书由胡健老师主审。
由于编者水平有限，书中难免存在错误和不妥之处，恳请广大读者批评指正。编者邮箱为 625657092@qq.com。
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