zh-cnGoodspeed Rss2Sat, 11 Oct 2008 06:04:46 GMTThu, 13 Mar 2008 15:21:04 GMThttp://blog.cechinamag.com/ihui198/70601/message.aspx<p class="g_w_100 g_t_wrap g_t_center g_t_bold g_t_24 g_c_pdin c07" id="blogtitle" __fks_0bXX_K-vQQw7K-6MH2fGdMkljuNfssxY>Profibus-DP通讯</p> <div class="g" _blog_list> <p style="TEXT-INDENT: 2em"><a href="http://img.blog.163.com/photo/XsIq-ajdXV4htOVSdgDgKg==/4516547476299482635.jpg" target=_blank></a>&nbsp;profibus概貌</p> <p style="TEXT-INDENT: 2em">(1) <a href="http://www.fieldbuses.com/topicnews.aspx?tid=7"><font color="#506e55">Profibus</font></a>是一种国际化、开放式、不依赖于设备生产商的现场总线标准。广泛适用于制造业自动化、流程工业自动化和楼宇、交通、电力等其他领域自动化。</p> <p style="TEXT-INDENT: 2em">(2) <a href="http://www.fieldbuses.com/topicnews.aspx?tid=7"><font color="#506e55">Profibus</font></a>由三个兼容部分组成，即PROFIBUS-DP（Decentralized Periphery）、PROFIBUS-PA(Process Automation)、PROFIBUS-FMS(Fieldbus Message Specification)。</p> <p style="TEXT-INDENT: 2em">(3) <a href="http://www.fieldbuses.com/topicnews.aspx?tid=7"><font color="#506e55">Profibus</font></a>-DP：是一种高速低成本通信，用于设备级控制系统与分散式I/O的通信。使用PROFIBUS-DP可取代办24VDC或4-20mA信号传输。</p> <p style="TEXT-INDENT: 2em">(4) <a href="http://www.fieldbuses.com/topicnews.aspx?tid=7"><font color="#506e55">Profibus</font></a>-PA：专为过程自动化设计，可使传感器和执行机构联在一根总线上，并有本征安全规范。</p> <p style="TEXT-INDENT: 2em">(5) <a href="http://www.fieldbuses.com/topicnews.aspx?tid=7"><font color="#506e55">Profibus</font></a>-FMS：用于车间级监控网络，是一个令牌结构、实时多主网络。</p> <p style="TEXT-INDENT: 2em">(7) <a href="http://www.fieldbuses.com/topicnews.aspx?tid=7"><font color="#506e55">Profibus</font></a>是一种用于工厂自动化车间级监控和现场设备层数据通信与控制的现场总线技术。可实现现场设备层到车间级监控的分散式数字控制和现场通信网络，从而为实现工厂综合自动化和现场设备智能化提供了可行的解决方案。 </p> <p style="TEXT-INDENT: 2em">种Profibus（DP、FMS、PA）均使用一致的总线存取协议。该协议是通过OSI参考模型第二层（数据链路层）来实现的。它包括了保证数据可靠性技术及传输协议和报文处理。介质存取控制（Medium Access Control—MAC）具体控制数据传输的程序，MAC必须确保在任何一个时刻只有一个站点发送数据。 </p> <p style="TEXT-INDENT: 2em">&nbsp;Profibus协议的设计要满足介质存取控制的两个基本要求： </p> <p style="TEXT-INDENT: 2em">&#8226; 在复杂的自动化系统（主站）间的通信，必须保证在确切限定的时间间隔中，任何一个站点要有足够的时间来完成通信任务。 </p> <p style="TEXT-INDENT: 2em">&#8226; 在复杂的程序控制器和简单的I/O设备（从站）间通信，应尽可能快速又简单地完成数据的实时传输。 </p> <p style="TEXT-INDENT: 2em">因此，Profibus总线存取协议，主站之间采用令牌传送方式，主站与从站之间采用主从方式。 </p> <p style="TEXT-INDENT: 2em">&nbsp;令牌传递程序保证每个主站在一个确切规定的时间内得到总线存取权（令牌）。在Profibus中，令牌传递仅在各主站之间进行，主站得到总线存取令牌时可与从站通信。每个主站均可向从站发送或读取信息。 </p> <p style="TEXT-INDENT: 2em">因此，可能有以下三种系统配置： </p> <p style="TEXT-INDENT: 2em">&#8226; 纯主—从系统 </p> <p style="TEXT-INDENT: 2em">&#8226; 纯主—主系统 </p> <p style="TEXT-INDENT: 2em">&#8226; 混合系统 </p> <p style="TEXT-INDENT: 2em">&nbsp;在总线系统初建时，主站介质存取控制MAC的任务是制定总线上的站点分配并建立逻辑环。在总线运行期间，断电或损坏的主站必须从环中排除，新上电的主站必须加入逻辑环。 </p> <p style="TEXT-INDENT: 2em">第2层的另一重要工作任务是保证数据的高度完整性。PROFIBUS在第2层按照非连接的模式操作，除提供点对点逻辑数据传输外，还提供多点通信，包括广播和选择广播功能。 </p> <p style="TEXT-INDENT: 2em"><strong><font size="4">Profibus-DP介绍</font></strong></p> <p style="TEXT-INDENT: 2em">&nbsp;Profibus-DP使用物理层，数据链接层和用户接口，用于现场层的高速数据传送。 </p> <p style="TEXT-INDENT: 2em">主站周期地读取从站地输入信息并周期地向从站发送输出信息。总线循环时间必须要比主站程序循环时间短。 </p> <p style="TEXT-INDENT: 2em">PROFIBUS-DP还提供智能化现场设备所需的非周期性通信以进行组态、诊断和报警处理及复杂设备在运行中参数的确定。 </p> <p style="TEXT-INDENT: 2em">DP和FMS可混合工作。 </p> <p style="TEXT-INDENT: 2em">&nbsp;特征： </p> <p style="TEXT-INDENT: 2em">(1) 传输技术: RS-485双绞线、双线电缆或光缆。波特率从 9.6Kbit/s~12Mbit/s ；12Mbps时最大传输距离为100m，1.5Mbps时为200m，另外还可以用中继器延长 。 </p> <p style="TEXT-INDENT: 2em">(2) 总线存取:&nbsp; 各主站间令牌传递，主站与从站间为主—从传送。支持单主或多主系统。总线上最多站点（主—从设备）数为126。 </p> <p style="TEXT-INDENT: 2em">(3) 通信:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 点对点（用户数据传送）或广播（控制指令）。循环主—从用户数据传送和非循环主—主数据传送。 </p> <p style="TEXT-INDENT: 2em">(4) 运行模式:&nbsp; 运行、清除、停止。 </p> <p style="TEXT-INDENT: 2em">(5) 同步： 控制指令允许输入和输出同步。同步模式：输出同步；锁定模式：输入同步。 </p> <p style="TEXT-INDENT: 2em">&nbsp;</p> <p style="TEXT-INDENT: 2em">(6)诊断功能： 经过扩展的Profibus-DP诊断能能对故障进行快速定位。诊断信息在总线上传输并由主站采集。诊断信息分三级：&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</p> <p style="TEXT-INDENT: 2em">&nbsp; &#8226; 本站诊断操作：本站设备的一般操作状态，&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</p> <p style="TEXT-INDENT: 2em">&nbsp; &#8226; 模块诊断操作：一个站点的某具体I/O模块故障。&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </p> <p style="TEXT-INDENT: 2em">&nbsp; &#8226; 通道诊断操作：一个单独输入/输出位的故障。 </p> <p style="TEXT-INDENT: 2em">(7) 可靠性和保护机制：&nbsp;&nbsp; 所有信息的传输按海明距离HD=4进行。DP从站带看门狗定时器（Watchdog Timer）。对DP从站的输入/输出进行存取保护。DP主站上带可变定时器的用户数据传送监视。 </p> <p style="TEXT-INDENT: 2em">&nbsp;</p> <p style="TEXT-INDENT: 2em"><strong>&Oslash;&nbsp;CPU集成DP接口连接远程ET200M&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&Oslash;&nbsp;通过Profibus-DP连接智能从站 </strong></p> <p style="TEXT-INDENT: 2em"></strong><a href="http://img.blog.163.com/photo/rCzEmFY_pV9XB-9kpA6BpQ==/2867104112775290696.jpg" target=_blank><img height="152" src="http://img.blog.163.com/photo/rCzEmFY_pV9XB-9kpA6BpQ==/2867104112775290696.jpg" width="224"></a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <a href="http://img.blog.163.com/photo/EbNn3fXejcwF-kkyZh22Eg==/341429146750325288.jpg" target=_blank><img style="WIDTH: 241px; HEIGHT: 150px" height="99" src="http://img.blog.163.com/photo/EbNn3fXejcwF-kkyZh22Eg==/341429146750325288.jpg" width="299"></a> </p> <p style="TEXT-INDENT: 2em">&nbsp;</p> <p style="TEXT-INDENT: 2em"><strong>&Oslash; CP342-5作为主站的应用&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&Oslash;CP342-5作为从站的应用 </strong></p> <p style="TEXT-INDENT: 2em"><strong>&nbsp; </strong><a href="http://img.blog.163.com/photo/bGu1MCDS6k38ANtdowcS9g==/867505878222636055.jpg" target=_blank><strong><img style="WIDTH: 235px; HEIGHT: 145px" height="180" src="http://img.blog.163.com/photo/bGu1MCDS6k38ANtdowcS9g==/867505878222636055.jpg" width="235"></strong></a><strong>&nbsp;&nbsp;&nbsp;&nbsp; </strong><a href="http://img.blog.163.com/photo/uVMFAIX7HZTwCb9Q1ei5Qw==/597571375556998746.jpg" target=_blank><strong><img style="WIDTH: 230px; HEIGHT: 145px" height="145" src="http://img.blog.163.com/photo/uVMFAIX7HZTwCb9Q1ei5Qw==/597571375556998746.jpg" width="351"></strong></a> </p> <p style="TEXT-INDENT: 2em"><strong></strong>&nbsp;</p> <p style="TEXT-INDENT: 2em"><strong>&Oslash;支持PROFIBUS-DP协议的第三方设备通信 </strong></p> <p style="TEXT-INDENT: 2em"><a href="http://img.blog.163.com/photo/XsIq-ajdXV4htOVSdgDgKg==/4516547476299482635.jpg"><strong><img height="145" src="http://img.blog.163.com/photo/XsIq-ajdXV4htOVSdgDgKg==/4516547476299482635.jpg" width="296" border="0"></strong></a> </p> <p style="TEXT-INDENT: 2em"><strong></strong>&nbsp;</p> <p style="TEXT-INDENT: 2em"><strong>&Oslash;直接数据交换通信方式 </strong></p> <p style="TEXT-INDENT: 2em">&nbsp;（1）单主站系统中DP 从站发送数据到智能从站（I 从站） </p> <p style="TEXT-INDENT: 2em"><a href="http://img.blog.163.com/photo/BrMskAHZbQbreHKv7KVcYw==/597571375556998960.jpg" target=_blank></a>&nbsp;</p> <p style="TEXT-INDENT: 2em"></p> <p style="TEXT-INDENT: 2em"></p> <p style="TEXT-INDENT: 2em"></p> <p>&nbsp;</p> <p style="TEXT-INDENT: 2em"></p> <p style="TEXT-INDENT: 2em"><a href="http://img.blog.163.com/photo/BrMskAHZbQbreHKv7KVcYw==/597571375556998960.jpg" target=_blank><img style="WIDTH: 289px; HEIGHT: 204px" height="174" src="http://img.blog.163.com/photo/BrMskAHZbQbreHKv7KVcYw==/597571375556998960.jpg" width="271"></a></p> <p style="TEXT-INDENT: 2em">&nbsp;（2）多主站系统中从站发送数据到其他主站 </p> <p style="TEXT-INDENT: 2em">&nbsp;<a href="http://img.blog.163.com/photo/QNw_-5UNmVibPLbe0FsR2Q==/297519050383568250.jpg" target=_blank><img height="204" src="http://img.blog.163.com/photo/QNw_-5UNmVibPLbe0FsR2Q==/297519050383568250.jpg" width="341"></a></p> <p style="TEXT-INDENT: 2em">&nbsp;（3）多主站系统中从站发送数据到智能从站 </p> <p style="TEXT-INDENT: 2em"><a href="http://img.blog.163.com/photo/D8rgeJPhOz-eS7eD-7oENg==/4018899717475078833.jpg" target=_blank><img style="WIDTH: 345px; HEIGHT: 214px" height="228" src="http://img.blog.163.com/photo/D8rgeJPhOz-eS7eD-7oENg==/4018899717475078833.jpg" width="358"></a></p> <p style="TEXT-INDENT: 2em"><strong>&Oslash;&nbsp;&nbsp;WINCC连接PROFIBUS-DP从站</strong></p> <p style="TEXT-INDENT: 2em"><a href="http://img.blog.163.com/photo/NJfb1QUQgzCxW0UI4X-ymA==/1434677956294684599.jpg" target=_blank><img height="134" src="http://img.blog.163.com/photo/NJfb1QUQgzCxW0UI4X-ymA==/1434677956294684599.jpg" width="264"></a>&nbsp; <a href="http://img.blog.163.com/photo/QHhkc8km_5Y1MIgm0Kbb9Q==/3953597522878211724.jpg" target=_blank><img style="WIDTH: 369px; HEIGHT: 139px" height="135" src="http://img.blog.163.com/photo/QHhkc8km_5Y1MIgm0Kbb9Q==/3953597522878211724.jpg" width="358"></a></p> <p style="TEXT-INDENT: 2em"><strong><font size="4">&nbsp;其他</font></strong></p> <p style="TEXT-INDENT: 2em"><strong>&nbsp;</strong>FDL (Fieldbus Data Link)通信方式 </p> <p style="TEXT-INDENT: 2em">&nbsp;FMS通信方式 </p> <p style="TEXT-INDENT: 2em">PA通信方式</p> <p style="TEXT-INDENT: 2em">S7通信方式</p> <p style="TEXT-INDENT: 2em">基于OPC的通信</p></div>http://blog.cechinamag.com/ihui198/70601/message.aspx PLC/PACThu, 24 Jan 2008 14:38:50 GMThttp://blog.cechinamag.com/ihui198/65570/message.aspx<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1; tab-stops: list 18.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore"><a href="http://blog.cechinamag.com/Upload/2008/1/24/d5285398-b582-47e3-b2f9-705b2ea7581d.JPG" target=_blank></a><strong>1.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></strong></span></span><strong><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">概述</span></strong></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（</span><span lang="EN-US">MultiPoint Interface</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）通信是当通信速率要求不高、通信数据量不大时，可以采用的一种简单经济的通信方式。</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通信可使用</span><span lang="EN-US">PLC S7-200/300/400</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、操作面板</span><span lang="EN-US">TP/OP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">及上位机</span><span lang="EN-US">MPI/PFOFIBUS</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通信卡，如</span><span lang="EN-US">CP5512/CP5611/CP5613</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等进行数据交换。</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络的通信速率为</span><span lang="EN-US">19.2kbit/s~12Mbit/s</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，通常默认设置为</span><span lang="EN-US">187.5kbit/s</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，只有能够设置为</span><span lang="EN-US">PROFIBUS</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">接口的</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络才支持</span><span lang="EN-US">12Mbit/s</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的通信速率。</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络最多可以连接</span><span lang="EN-US">32</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个节点，最大通信距离为</span><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="50" UnitName="米"><span lang="EN-US">50</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">米</span></st1:chmetcnv><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，但是可以通过中继器来扩展长度。通过</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">实现</span><span lang="EN-US">PLC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间通信有三种方式：全局数据包通信方式、无组态连接通信方式和组态连接通信方式。</span><span lang="EN-US">PLC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间的网络配置如图所示。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><img src="http://blog.cechinamag.com/Upload/2008/1/24/32fa6830-72b2-456a-98b1-56498734c07f.jpg"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1; tab-stops: list 18.0pt"><strong><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">2.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">硬件和软件需求</span></strong></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">硬件：</span><span lang="EN-US">CPU412-2 DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US">CPU<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">电缆</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">软件：</span><span lang="EN-US">STEP7 V5.2 SP1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以上</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"><?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:shapetype id=_x0000_t75 stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:connecttype="rect" gradientshapeok="t" o:extrusionok="f"></v:path><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:lock aspectratio="t" v:ext="edit"></o:lock></v:shapetype></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1; tab-stops: list 18.0pt"><strong><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">3.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">设置</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">参数</span></strong></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可分为两部分：</span><span lang="EN-US">PLC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">侧和</span><span lang="EN-US">PC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">侧的参数设置。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; mso-list: l5 level1 lfo2; tab-stops: list 21.0pt"><font face="Verdana, Arial, Helvetica, sans-serif"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">(1)<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span lang="EN-US">PLC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">侧参数设置</span></font></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在硬件组态时可通过点击图中“</span><span lang="EN-US">Properties</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”按钮来设置</span><span lang="EN-US">CPU</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">属性，包括地址及通信速率，具体操作如图所示。注意：整个</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络中通信速率必须保持一致，且</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址不能冲突。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><a href="http://blog.cechinamag.com/Upload/2008/1/24/cdef797c-82f3-44e6-bef6-c64cacd5a97b.JPG" target=_blank><img height="282" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/cdef797c-82f3-44e6-bef6-c64cacd5a97b.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; mso-list: l5 level1 lfo2; tab-stops: list 21.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">(2)<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span lang="EN-US">PC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">侧参数设置</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在</span><span lang="EN-US">PC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">侧痛要也要设置</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">参数，在“控制面板”→“</span><span lang="EN-US">Set PG/PC Interface</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”中选择所用的编程卡，这里为</span><span lang="EN-US">CP5611</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，访问点选择“</span><span lang="EN-US">S7ONLIEN</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”，</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1; tab-stops: list 18.0pt"><strong><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">4.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">全局数据包通信方式</span></strong></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">对于</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间的数据交换，我们只关心数据的发送区和接收区，全局数据包的通讯方式是在配置</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">硬件的过程中，组态所要通讯的</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站之间的发送区和接收区，不需要任何程序处理，这种通讯方式只适合</span><span lang="EN-US">S7-300/400 PLC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间相互通讯。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">实验步骤如下：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l0 level2 lfo3; tab-stops: list 27.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">①<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">建立</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">首先打开编程软件</span><span lang="EN-US">STEP7</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，建立一个新项，在此项目下插入两个</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站分别为</span><span lang="EN-US">SIMATIC 400/CPU412-2DP </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</span> <span lang="EN-US">SIMATIC 300/CPU<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，并分别插入</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">完成硬件组态，配置</span><span lang="EN-US">MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的站号和通讯速率，在本例中</span><span lang="EN-US">MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的站号分别设置为</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站和</span><span lang="EN-US">4 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站，通讯速率为</span><span lang="EN-US">187.5Kbit/S </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l0 level2 lfo3; tab-stops: list 27.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">②<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">组态数据的发送和接收区</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选中</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络，再点击菜单“</span><span lang="EN-US">Options</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">→“</span><span lang="EN-US">Define Global Date</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”进入组态画面如图所示。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l0 level2 lfo3; tab-stops: list 27.0pt" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><a href="http://blog.cechinamag.com/Upload/2008/1/24/b0c8d5a2-5750-45ae-89fc-1ee9b5187dfc.JPG" target=_blank><img height="185" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/b0c8d5a2-5750-45ae-89fc-1ee9b5187dfc.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l0 level2 lfo3; tab-stops: list 27.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">③<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">插入所有需要通讯的</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站</span><span lang="EN-US">CPU<span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">双击</span><span lang="EN-US">GD ID </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">右边的</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">栏选择需要通讯</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站的</span><span lang="EN-US">CPU</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">栏总共有</span><span lang="EN-US">15 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">列，这就意味者最多有</span><span lang="EN-US">15 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">能够参与通讯。在每个</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">栏底下填上数据的发送区和接收区，</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">例如：</span><span lang="EN-US"> CPU412-2DP </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的发送区为</span><span lang="EN-US">DB1.DBB0~DB1.DBB21</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，可以填写为</span><span lang="EN-US">DB1.DBB0</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</span><span lang="EN-US">22 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（其中“</span><span lang="EN-US">DB1.DBB0</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”表示起始地址，“</span><span lang="EN-US">22</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”表示数据长度）然后在菜单“</span><span lang="EN-US">edit</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”项下选择“</span><span lang="EN-US">Sender</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”作为发送区。而</span><span lang="EN-US">CPU313C-2DP </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的接收区为</span><span lang="EN-US">DB1.DBB0~21</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，可以填写为</span><span lang="EN-US">DB1.DBB0</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</span><span lang="EN-US">22</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。如图所示。编译存盘后，把组态数据分别下载到</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中，这样数据就可以相互交换了。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><a href="http://blog.cechinamag.com/Upload/2008/1/24/8d0bb73c-1953-49f9-aa20-90a142d629a4.JPG" target=_blank><img height="176" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/8d0bb73c-1953-49f9-aa20-90a142d629a4.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">注意：发送区和接收区的长度必须一致，地址区可以为</span><span lang="EN-US">DB</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US">M</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US">I</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US">Q</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">区，</span><span lang="EN-US">S7-300</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址区长度最大为</span><span lang="EN-US">22</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">字节，</span><span lang="EN-US">S7-400</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址区长度最大为</span><span lang="EN-US">54</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">字节。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l0 level2 lfo3; tab-stops: list 27.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">④<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通信的诊断</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在多个</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通讯时，有时通讯会中断，可用通过下述方法进行监测：在菜单“</span><span lang="EN-US">View</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”中点击“</span><span lang="EN-US">Scan Rates</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”和“</span><span lang="EN-US">GD Status</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”可以扫描系数和状态字，如图所示。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span lang="EN-US"><a href="http://blog.cechinamag.com/Upload/2008/1/24/0e40ba35-8dc3-4733-ab7a-99712e92c65a.JPG" target=_blank><img height="260" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/0e40ba35-8dc3-4733-ab7a-99712e92c65a.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">SR</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：扫描频率系数。如上图</span><span lang="EN-US">SR1.1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">225</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，表示发送更新时间为</span><span lang="EN-US">225</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">×</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">循环时间。范围为</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">～</span><span lang="EN-US">255</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。通讯中断的问题往往设置扫描时间过快，可改大一些。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">GSD</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：每包数据的状态字（双字）。可根据状态字编写相应的错误处理程序，结构如下：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第一位：发送区域长度错误。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第二位：发送区数据块不存在。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第四位：全局数据包丢失。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第五位：全局数据包语法错误。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第六位：全局数据包数据对象丢失。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第七位：发送区与接收区数据对象长度不一致。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第八位：接收区长度错误。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第九位：接收区数据块不存在。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第十二位：发送方从新启动。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第三十二位：接收区接收到新数据。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">GST</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：所有</span><span lang="EN-US">GDS </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">相“</span><span lang="EN-US">OR</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”的结果</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l0 level2 lfo3; tab-stops: list 27.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">⑤<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">事件触发的数据传送</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如果我们需要控制数据的发送与接收，如在某一事件或某一时刻，接收和发送所需要的数据，这时将用到事件触发的数据传送方式。这种通讯方式是通过调用</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的系统功能</span><span lang="EN-US">SFC60 (GD_SND)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</span><span lang="EN-US">SFC61(GD_RCV)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来完成的，而且只支持</span><span lang="EN-US">S7-400CPU</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，并且相应设置</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</span><span lang="EN-US">SR</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（扫描频率）为</span><span lang="EN-US">0</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，可参考下图全局数据的组态画面：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><a href="http://blog.cechinamag.com/Upload/2008/1/24/d686f870-41d9-4d70-94ce-8908c4c17a85.JPG" target=_blank><img height="202" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/d686f870-41d9-4d70-94ce-8908c4c17a85.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">编译存盘后下载到相应的</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中，然后在</span><span lang="EN-US">S7-400 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中调用</span><span lang="EN-US">SFC60/61 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">控制接收与发送。具体程序代码为：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1" align="center"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore"><img src="http://blog.cechinamag.com/Upload/2008/1/24/e56005fa-1bc8-4fe0-bc2d-d03cde30e90a.jpg"></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1"><strong><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">5.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">无组态连接通信方式</span></strong></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">无组态的</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通信需要调用系统功能块</span><span lang="EN-US">SFC65~SFC69</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来实现，这种通信方式适合于</span><span lang="EN-US">S7-300</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</span><span lang="EN-US">S7-400</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</span><span lang="EN-US">S7-200</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间的通信。通过调用</span><span lang="EN-US">SFC</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来实现</span><span lang="EN-US">MPI</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通信又可分为两种方式：双边通信方式和单边通信方式。调用系统功能通信方式不能和全局数据通信方式混合使用。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; mso-list: l2 level1 lfo4; tab-stops: list 21.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">(1)<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">双边编程通信方式</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在通讯的双方都需要调用通讯块，一方调用发送块，另一方就要调用接收块来接收数据。这种通讯方式适用</span><span lang="EN-US">S7-300/400 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间通讯，发送块是</span><span lang="EN-US">SFC65(X_SEND)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，接收块是</span><span lang="EN-US">SFC66(X_RCV)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。实验步骤如下：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l2 level2 lfo4; tab-stops: list 39.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">①<span style="FONT: 7pt 'Times New Roman'"> </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在</span><span lang="EN-US">STEP7 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中创建两个站</span><span lang="EN-US">STATION1, CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">S7- 412-2DP, MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站地址为</span><span lang="EN-US">5; STATION2, CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">S7<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="True" HasSpace="False" SourceValue="313" UnitName="C">-313C</st1:chmetcnv>-2DP , MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站号为</span><span lang="EN-US">4</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站发送</span><span lang="EN-US">2 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">包数据给</span><span lang="EN-US">4 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站，</span><span lang="EN-US">4 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站判断后放在相应的数据区中。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l2 level2 lfo4; tab-stops: list 39.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">②<span style="FONT: 7pt 'Times New Roman'"> </span></span></span><v:shape id=_x0000_s1026 style="MARGIN-TOP: 23.4pt; Z-INDEX: 1; LEFT: 0px; MARGIN-LEFT: 9pt; WIDTH: 182.7pt; POSITION: absolute; HEIGHT: 296.85pt; TEXT-ALIGN: left" type="#_x0000_t75" wrapcoords="0 109 0 21436 21511 21436 21511 109 0 109"><v:imagedata o:title="" src="file:///C:\DOCUME~1\WELCOM~1\LOCALS~1\Temp\msohtml1\01\clip_image015.wmz"></v:imagedata><?xml:namespace prefix = w ns = "urn:schemas-microsoft-com:office:word" /><w:wrap type="tight"></w:wrap></v:shape><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">编程</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在</span><span lang="EN-US">2 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站</span><span lang="EN-US">OB35 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中须调用</span><span lang="EN-US">SFC65</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，具体程序代码为：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p>&nbsp;<img src="http://blog.cechinamag.com/Upload/2008/1/24/f5c9c07a-556d-4361-9177-c157bb3ec5fc.JPG"></o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">参数说明：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">REQ </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为发送请求</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">该参数为</span><span lang="EN-US">1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时发送。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">CONT </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示发送数据是连续的一个整体。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">DEST_ID </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示对方的</span><span lang="EN-US">MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">REQ_ID </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示一包数据的标识符</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，标识符自己定义。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span>SD </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示发送区，以指针的格式表示，例子中第一包数据为</span><span lang="EN-US">DB1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中从</span><span lang="EN-US">DBX0.0</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">(DBB0) </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以后的</span><span lang="EN-US">10</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节数据</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">发送区最大为</span><span lang="EN-US">76 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">RET_VAL </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示发送的状态</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">BUSY </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时表示发送中止。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US"><o:p>&nbsp;</o:p></span><span lang="EN-US"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在这个例子中</span><span lang="EN-US">, M1.1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">M1.3 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时，</span><span lang="EN-US">CPU412-2DP </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">将发送标识符为“</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”和“</span><span lang="EN-US">2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”的两包数据给</span><span lang="EN-US">4 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站的</span><span lang="EN-US">CPU<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一个</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">究竟可以和能几个</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通讯和</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的通讯资源有关系，这也决定</span><span lang="EN-US">SFC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的调用的次数。以上例作说明，</span><span lang="EN-US">M1.1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">M1.3 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时，与</span><span lang="EN-US">4 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站的连接就建立起来了，反之</span><span lang="EN-US">4 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站发送，</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站接收同样要建立一个连接，也就是说两个站通讯时，若都需要发送和接收数据</span><span lang="EN-US">,</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">则须占用两个动态连接。通信状态可参考下图。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span lang="EN-US"><a href="http://blog.cechinamag.com/Upload/2008/1/24/a4759b88-ffc8-4034-9e03-2d7c7048e100.JPG" target=_blank><img height="315" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/a4759b88-ffc8-4034-9e03-2d7c7048e100.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">M1.1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">M1.3 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">0 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时，此时建立的连接并没有释放，必须调用</span><span lang="EN-US">SFC69 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来释放连接，在上例中</span><span lang="EN-US">M1.5 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时，与</span><span lang="EN-US">4 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站建立的连接断开，如下图：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><a href="http://blog.cechinamag.com/Upload/2008/1/24/9397bceb-94c6-4aba-b9de-6984965f1ba9.JPG" target=_blank><img height="123" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/9397bceb-94c6-4aba-b9de-6984965f1ba9.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在</span><span lang="EN-US">S7 <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</span><span lang="EN-US">OB1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中调用接收块</span><span lang="EN-US">SFC66</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，具体程序代码为：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><img src="http://blog.cechinamag.com/Upload/2008/1/24/5bee714c-1927-48ec-a587-972fe32889af.JPG"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">参数</span><span lang="EN-US">EN_DT </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示接收使能，</span><span lang="EN-US">RET_VAL </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示接收状态字，</span><span lang="EN-US">REQ_ID </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为接收数据包的标识符，</span><span lang="EN-US">NDA </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时表示有新的数据包，为</span><span lang="EN-US">0 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时则表示没有新的数据包，</span><span lang="EN-US">RD </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">表示接收区，接收区放在</span><span lang="EN-US">DB1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中从</span><span lang="EN-US">DBB0 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以后</span><span lang="EN-US">10 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节中。程序中，接收块只识别数据的标识符，而不管是哪一个</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">发送的，接收从</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">号站</span><span lang="EN-US">CPU412-2DP </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">发送的两包数据，当标识符为“</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">且</span><span lang="EN-US">M1.3 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时，复制接收区的数据到</span><span lang="EN-US">DB2 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的前</span><span lang="EN-US">10 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节中（调用</span><span lang="EN-US">SFC20</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">），当标识符为“</span><span lang="EN-US">2</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时，</span><span lang="EN-US">M1.4 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，复制接收区的数据到</span><span lang="EN-US">DB3 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的前</span><span lang="EN-US">10</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节中。数据传送状态如图所示。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; mso-list: l2 level1 lfo4; tab-stops: list 21.0pt" align="center"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore"><a href="http://blog.cechinamag.com/Upload/2008/1/24/d3868722-d55a-4a8f-a68f-5c6f7641f844.JPG" target=_blank><img height="348" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/d3868722-d55a-4a8f-a68f-5c6f7641f844.JPG" width="400"></a></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 21pt; TEXT-INDENT: -21pt; mso-list: l2 level1 lfo4; tab-stops: list 21.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">(2)<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">单边编程通信方式</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">与双向通讯时两方都需要编写发送和接收块不同，单向通讯只在一方编写通讯程序，这也是客户机与服务器的关系，编写程序一方的</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作为客户机，没有编写程序一方的</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作为服务器，客户机调用</span><span lang="EN-US">SFC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通讯块对服务器的数据进行读写操作，这种通讯方式适合</span><span lang="EN-US">S7-300/400/200 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间通讯，</span><span lang="EN-US">S7-300/400 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可以同时作为客户机和服务器，</span><span lang="EN-US">S7-200 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">只能作服务器。</span><span lang="EN-US">SFC67 (X_GET) </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用来<span style="mso-bidi-font-weight: bold">读回</span>服务器指定数据区中的数据并存放到本地的数据区中，</span><span lang="EN-US">SFC68 (X_PUT)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用来写本地数据区中的数据到服务器中指定的数据区中。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">具体实验步骤如下：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l3 level1 lfo5; tab-stops: list 45.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">①<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">新建项目</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">建立两个</span><span lang="EN-US">S7 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站，</span><span lang="EN-US">STATION1, CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">S7 <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP ,MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址为</span><span lang="EN-US">4</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作为客户机</span><span lang="EN-US">; STATION2 ,CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">S7 412-2DP, MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">地址为</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作为服务器。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l3 level1 lfo5; tab-stops: list 45.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">②<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">编程</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span>CPU421-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</span><span lang="EN-US">OB1</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中调用</span><span lang="EN-US">SFC68</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，把本地数据区的数据</span><span lang="EN-US">DB2.DBB0</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">开始的连续</span><span lang="EN-US">10</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节发送到</span><span lang="EN-US">CPU<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</span><span lang="EN-US">DB1.DBB20</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">开始的</span><span lang="EN-US">10</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节中；调用</span><span lang="EN-US">SFC67</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">CPU412-1DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">读出</span><span lang="EN-US">CPU<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的数据</span><span lang="EN-US">DB1.DBB0</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">开始的</span><span lang="EN-US">10</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节放到本地</span><span lang="EN-US">DB2.DBB20</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">开始的</span><span lang="EN-US">10</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节中。程序代码如下图所示。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><img src="http://blog.cechinamag.com/Upload/2008/1/24/0d482d4f-acde-4fdb-bfc4-76e2f5116dc5.JPG"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">同样</span><span lang="EN-US">S7-300CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">也可以作为客户机，</span><span lang="EN-US">S7-400CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">也可以作为服务器。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">数据传送状态如图所示。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1" align="center"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore"><a href="http://blog.cechinamag.com/Upload/2008/1/24/eab232d7-7103-4949-a604-3a270da3a1d4.JPG" target=_blank><img height="354" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/eab232d7-7103-4949-a604-3a270da3a1d4.JPG" width="400"></a></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l1 level1 lfo1"><strong><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">6.<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">组态连接通信方式</span></strong></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span lang="EN-US">MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络，调用系统功能块进行</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站之间的通讯只适合于</span><span lang="EN-US">S7-300/400</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">S7-400/400 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">之间的通讯，</span><span lang="EN-US">S7-300/400 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通讯时，由于</span><span lang="EN-US">S7-300CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中不能调用</span><span lang="EN-US">SFB12(BSEND)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">SFB13 (BRCV)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">SFB14(GET)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">SFB15(PUT)</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，不能主动发送和接收数据，只能进行单向通讯，所以</span><span lang="EN-US">S7-300PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">只能作为一个数据的服务器，</span><span lang="EN-US">S7-400PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可以作为客户机对</span><span lang="EN-US">S7-300PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的数据进行读写操作。</span><span lang="EN-US">S7-400/400 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通讯时，</span><span lang="EN-US">S7-400PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可以调用</span><span lang="EN-US">SFB14</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">SFB15</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，既可以作为数据的服务器同时也可以作为客户机进行单向通讯，还可以调用</span><span lang="EN-US">SFB12</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">SFB13</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，发送和接收数据进行双向通讯，在</span><span lang="EN-US">MPI </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">网络上调用系统功能块通讯，最大一包数据不能超过</span><span lang="EN-US">160 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">具体实验步骤如下：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l4 level1 lfo6; tab-stops: list 24.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">①<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">新建项目</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">建立两个</span><span lang="EN-US">S7 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站</span><span lang="EN-US">,STATION1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">其</span><span lang="EN-US">CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">S7 412-2DP </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，站地址为</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</span><span lang="EN-US">STATION2, CPU </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为</span><span lang="EN-US">S7 <st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，站地址为</span><span lang="EN-US">4</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，假设</span><span lang="EN-US">S7-400PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">把本地数据</span><span lang="EN-US">DB1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中字节</span><span lang="EN-US">0 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以后的</span><span lang="EN-US">5 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节写到</span><span lang="EN-US">S7-300PLC DB1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中字节</span><span lang="EN-US">0 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以后的</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节中去，然后再读出</span><span lang="EN-US">S7-300PLC DB1 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中字节</span><span lang="EN-US">0 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以后的</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节中的数据并将其放到</span><span lang="EN-US">S7-400PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">本地数据块</span><span lang="EN-US"> DB2 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中字节</span><span lang="EN-US">0 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">以后的</span><span lang="EN-US">5</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个字节中去。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l4 level1 lfo6; tab-stops: list 24.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">②<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">组态连接及参数设置</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在</span><span lang="EN-US">STEP7 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中点击“</span><span lang="EN-US">Options</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”</span> <span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">“</span><span lang="EN-US">Configure Network</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”进入网络组态画面，如图所示：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><a href="http://blog.cechinamag.com/Upload/2008/1/24/6bf2a7f0-30ae-4e19-b18a-c23db6a5b998.JPG" target=_blank><img height="216" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/6bf2a7f0-30ae-4e19-b18a-c23db6a5b998.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">右键点击</span><span lang="EN-US">CPU412-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，选择“</span><span lang="EN-US">Insert New Connections</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”新建连接。在弹出的对话框中选择“</span><span lang="EN-US">S7 connection</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”连接类型，并选择所需连接的</span><span lang="EN-US">CPU</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，这里选择</span><span lang="EN-US">CPU<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="313" UnitName="C">313C</st1:chmetcnv>-2DP</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。如图所示。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><img src="http://blog.cechinamag.com/Upload/2008/1/24/fc5eae81-6196-44f1-a0f8-faa0df988654.JPG"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">点击“</span><span lang="EN-US">Apply</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">”按钮建立连接，并查看连接表的详细属性，如下图：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><a href="http://blog.cechinamag.com/Upload/2008/1/24/8eca4ea5-5a17-4f35-b536-156258185be3.JPG" target=_blank><img height="300" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/8eca4ea5-5a17-4f35-b536-156258185be3.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">组态完成后编译存盘，并将连接组态分别下载到各自的</span><span lang="EN-US">CPU</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 27pt; mso-list: l4 level1 lfo6; tab-stops: list 24.0pt"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore">③<span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">编程</span><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在</span><span lang="EN-US">PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中调用通讯所需的系统功能块，由于是单向通讯</span><span lang="EN-US">S7-300PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">是数据的服务器，所以只能在</span><span lang="EN-US">S7-400PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">侧编程，调用</span><span lang="EN-US">SFB15 </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">写数据到</span><span lang="EN-US">S7-300PLC </span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中如下图：</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0" align="center"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><a href="http://blog.cechinamag.com/Upload/2008/1/24/c5ed6457-7d5b-40ba-8c71-b4cb86bfbff7.JPG" target=_blank><img height="310" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/c5ed6457-7d5b-40ba-8c71-b4cb86bfbff7.JPG" width="400"></a></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">程序编制好后下载到各自的</span><span lang="EN-US">CPU</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">站，并建立变量表测试程序的运行。如图所示。</span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore"><a href="http://blog.cechinamag.com/Upload/2008/1/24/d5285398-b582-47e3-b2f9-705b2ea7581d.JPG" target=_blank><img height="609" alt="点击看大图" src="http://blog.cechinamag.com/Upload/2008/1/24/d5285398-b582-47e3-b2f9-705b2ea7581d.JPG" width="400"></a></span></span></span></p> <p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center" align="center"><span lang="EN-US"></span>&nbsp;</p>http://blog.cechinamag.com/ihui198/65570/message.aspx PLC/PAC