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📄 vb,vc开发opc客户程序必读! - 倪森的胡言乱语 - csdnblog.htm

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  <LI class=listitem>yzhiguo:<A title="点击查看《回复:OPC Server开发的几大境界》" 
  href="http://blog.csdn.net/freeboy20sui/archive/2004/09/15/105671.aspx#542604">http://blog.csdn.net/freeboy20sui/archive/2004/09/15/105671.aspx#542604</A>
  <LI class=listitem>opc123:<A title=点击查看《回复:OPC工具和书籍》 
  href="http://blog.csdn.net/freeboy20sui/archive/2004/09/11/101187.aspx#517058">楼主,那三个文档我都下载不了,你能发一份给我吗?非常感激! 
  <BR>260616936@163.COM</A>
  <LI class=listitem>opc123:<A title=点击查看《回复:OPC工具和书籍》 
  href="http://blog.csdn.net/freeboy20sui/archive/2004/09/11/101187.aspx#517055">楼主,那三个文档我都下载不了,你能发一份给我吗?非常感激!</A>
  <LI class=listitem>摆渡人:<A title="点击查看《回复:开始翻译Jakarta Commons Cookbook。》" 
  href="http://blog.csdn.net/freeboy20sui/archive/2006/05/15/728899.aspx#504569">有没有翻译中文呢。没有的话偶就打算去买E文算了。</A>
  <LI class=listitem>袁:<A title="点击查看《回复:开始翻译Jakarta Commons Cookbook。》" 
  href="http://blog.csdn.net/freeboy20sui/archive/2006/05/15/728899.aspx#486998">什么时候才可以有中文版的书</A></LI></UL></SPAN></SPAN><BR><BR></DIV>
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<DIV class=postTitle><A 
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border=0>&nbsp;VB,VC开发OPC客户程序必读!</A> </DIV>
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      <DIV align=center><SPAN class=big><FONT 
      color=#000000><B>VB,VC开发OPC客户程序必读!</B></FONT></SPAN><FONT 
      color=#ffffff><BR><FONT color=#000000>作者: <A title=查看用户详细信息、留言、加为好友、用户专集 
      href="http://www.gongkong.com/tech/userdetail.asp?username=szTaoyanbin" 
      target=_blank><FONT color=#00007f>szTaoyanbin</FONT></A> ,2004-2-8 
      10:12:00 发表于:《<A href="http://www.gongkong.com/tech/forum/list38.asp" 
      target=_blank><FONT color=#00007f>OPC论坛</FONT></A>》 共有40人回复,7055次点击 
      </FONT></FONT></DIV></TD></TR>
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          <TD><SPAN class=text 
            style="LINE-HEIGHT: 25px">  开发OPC客户程序必读!!!!!!!!!<BR>  <BR>  Step.1<BR>  如果程序要调用COM 
            库的某一个函数必须先登录COM 
            函数CoInitialize()可<BR>  以完成此功能从函数CoGetMalloc()可以得到一个指向COM 
            内存管理接口的指<BR>  针<BR>  HRESULT 
            rl;<BR>  rl=CoInitialize(NULL);<BR>  rl=CoGetMalloc(MEMCTX_TASK,&amp;g_pIMalloc);<BR>  <BR>  Step.2<BR>  每个COM 
            服务器有一个ProgID 通过它可以得到一个全球唯一的CLSID 
            用<BR>  CLSIDFromProgID()函数可以实现这个变换ProgID 用变量szName 
            进行参数传<BR>  递在示例程序中它的值是L”OPC.SimaticNET”<BR>  m_Popc<BR>  rl=CLSIDFromProgID(szName,&amp;clsid);<BR>  <BR>  <BR>  Step.3<BR>  CoCreateInstance()函数创建一个类实例其CLSID 
            值设定如下:<BR>  r2=CocreateInstance(clsid,NULL,CLSCTX_LOCAL_SERVER,IID_IUnkown,<BR>  (void**)&amp;Punk);<BR>  这段程序的结果是一个指向服务器对象IUnknown 
            接口的指针变量pUNK<BR>  <BR>  Step.4<BR>  从IUnkown 
            接口通过QueryInterface()方法可以得到其它接口的指针<BR>  HRESULT 
            r3;<BR>  r3=pUNK-&gt;QueryInterface(IID_IOPCServer , (void 
            **)&amp;m_Popc);<BR>  这段程序的结果是得到一个指向服务器对象IOPCServer 
            接口的指针(变量m_Popc)<BR>  <BR>  Step.5<BR>  IOPCServer 
            接口的AddGroup()方法可以创建OPC 组<BR>  m_pItemMgt)<BR>  HRESULT 
            r1;<BR>  r1=m_Popc-&gt;AddGroup(szName,TRUE,500,1,&amp;TimeBias,<BR>  &amp;PercDeadband,dwLCID,&amp;m_GrpServerHandle,<BR>  &amp;RevUpRate,IID_IOPCItemMgt,<BR>  (LPUNKNOWN*)&amp;m_pItemMgt);<BR>  这段程序的执行结果是创建一个有指定名称和属性的组在返回的参数中有一<BR>  个指向所需要的进程组对象接口的指针在这里是IOPCItemMgt(变量<BR>  <BR>  Step.6<BR>  IOPCItemMgt 
            接口有AddItem()方法可以创建OPC 项<BR>  HRESULT 
            r1;<BR>  r1=m_pItemMgt-&gt;AddItems(NumItems,pItems, 
            &amp;m_pItResult,&amp;pErrors);<BR>  这段程序的结果是创建有特殊属性的指定数量的项除此之外事件结构变量<BR>  m_pItResult 
            服务器句柄目标系统上的项数据类型等也被赋值<BR>  <BR>  用于执行所需操作的指针需要通过现有的指向IOPCItemMgt 
            接口的指针得到如<BR>  如果用户要进行异步通信就需要指向IOPCAsyncIO 接口的指针<BR>  HRESULT 
            rl;<BR>  r1=m_pItemMgt-&gt;Queryface(IID_IOPCAsyncIO, (void * *) 
            &amp; pAsyncIO);<BR>  <BR>  通过该接口的Read() 
            和Write()两个方法可以读写项的数值<BR>  r2=pAsyncIO-&gt;Read(m_dwConnection,OPC_DS_CACHE,dwNumItems,phServer, 
            &amp;m_TransactionID,&amp;pErrors);<BR>  这段程序的执行结果是OPC 
            项的数据被送到客户程序的IAdviseSink 
            接口<BR>  <BR>  Step.7<BR>  在程序停止运行之前必须删除已创建的OPC 
            对象并释放内存到目前为止用到<BR>  的各种接口都有相应的函数<BR>  5.4 
            r1=m_pItemMgt-&gt;RemoveItems(dwNumItems,phServer,&amp;pErrors);<BR>  r1=m_Popc-&gt;RemoveGroup(m_GrpServerHandle,TRUE);<BR>  m_pItemMgt-&gt;Release();<BR>  m_pOPC-&gt;Release();</SPAN></TD></TR></TBODY></TABLE></TD></TR>
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      <DIV align=center><FONT color=#ff0000><B 
      class=text>以下是对《VB,VC开发OPC客户程序必读!》的回复: </B></FONT></DIV></TD></TR>
  <TR>
    <TD class=text width=378 bgColor=#e7e7e7 height=19><IMG height=13 
      src="VB,VC开发OPC客户程序必读! - 倪森的胡言乱语 - CSDNBlog.files/edit.gif" width=18 
      border=0> <A title=查看用户详细信息、留言、加为好友、用户专集 
      href="http://www.gongkong.com/tech/userdetail.asp?username=szTaoyanbin" 
      target=_blank><FONT color=#00007f>SZTAOYANBIN</FONT></A>: </TD>
    <TD class=text width=372 bgColor=#e7e7e7 height=19>
      <DIV align=right>  2003-12-30 13:47:00</DIV></TD></TR>
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          <TD class=text style="LINE-HEIGHT: 25px">   可叹!!!!!!!<BR>   VB 
            DEMO!!!!!<BR>  <BR>  STEP_1:Init Server!!<BR>   Set 
            Svr=CreateObject(ProgID$)<BR>  <BR>  STEP_2:AddGroup!!<BR>   Set 
            Group=Svr.AddGroup "szTaoYanBinGRP" false 
            RateRequested,GroupClientHdl, PercentDeadband, 
            dwLangId_ENGLISH,GroupServerHdl, RateRevised<BR>   Set PtrItemMgt 
            =Group<BR>  <BR>  STEP_3:AddItems!!!<BR>   ItemsActive(0)= True: 
            ItemsActive(1)= True <BR>   PtrItemMgt.AddItems NbrItems, 
            ItemsIDs,ItemsActivity, ItemsClientHdls,ItemsSvrHdls, ItemsErrors, 
            ItemsObjects, accessPath<BR>  <BR>  STEP_4:Read&amp;Write 
            Items!!!!<BR>   Set ptrSyncIO = group <BR>   WHILE (true) <BR>   
            PtrSyncIO.OPCRead OPC_DS_DEVICE, NbrItems, ItemsSvrHdls,pValues, 
            pQualities, pTimeStamps, ItemsErrors<BR>   WEND<BR>  <BR>  STEP_5: 
            Free Group&amp;Items!!!!!!<BR>   Svr.RemoveGroup GroupServerHdl, 
            False <BR>   Set Group = Nothing <BR>   Set Svr = NothingS<BR>   
            OK!!!!!!<BR>   如果你认为本贴有价值,请推荐为精华!!!!!!<BR>   
            THANKS!!!!!!!!!!!!!!!!!!!! </TD></TR></TBODY></TABLE></TD></TR>
  <TR>
    <TD class=text width=378 bgColor=#e7e7e7 height=19><IMG height=13 
      src="VB,VC开发OPC客户程序必读! - 倪森的胡言乱语 - CSDNBlog.files/edit.gif" width=18 
      border=0> <A title=查看用户详细信息、留言、加为好友、用户专集 
      href="http://www.gongkong.com/tech/userdetail.asp?username=szTaoyanbin" 
      target=_blank><FONT color=#00007f>SZTAOYANBIN</FONT></A>: </TD>
    <TD class=text width=372 bgColor=#e7e7e7 height=19>
      <DIV align=right>  2003-12-30 15:02:00</DIV></TD></TR>
  <TR>
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          <TD class=text style="LINE-HEIGHT: 25px">   OPC HTML DEMO<BR>   
            szTaoyanbin注,把OPC 
            SEVER作为JAVA小程序的插件,加入HEML中,OBJECT的标记名称定义为GRP1则可!!!!!<BR>  <BR>  &lt;Script 
            Language="VBScript"&gt;&lt;!--<BR>  <BR>  Dim Item1<BR>  Dim 
            Server<BR>  Dim fValue<BR>  <BR>  Dim ItemValue<BR>  <BR>  Sub 
            Window_OnLoad()<BR>   Server = "szTaoYanBin_Group"<BR>   GRP1.Init 
            Server, ""<BR>   GRP1.AddItem "", Item1<BR>   GRP1.Read<BR>   fValue 
            = GRP1.GetValue(Item1)<BR>   GRP1.Start 500<BR>  End 
            Sub<BR>  <BR>  Sub Window_OnUnload()<BR>   GRP1.Stop<BR>  End 
            Sub<BR>  <BR>  Sub GRP1_OnGroupChange()<BR>   fValue = 
            GRP1.GetValue(Item1)<BR>  End 
            Sub<BR>  <BR>  --&gt;&lt;/Script&gt;<BR>  如果有一天,你用网页作为组态软件,而是由本人启迪的话,别望了说声THANKS!!!<BR>   
            szTaoyanbin@163.com</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE><BR><BR>
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<H3></H3>
<DIV class=post>
<DIV class=postTitle><A title="permalink: 回复:VB,VC开发OPC客户程序必读!" 
href="http://blog.csdn.net/freeboy20sui/articles/104073.aspx#283010">#</A>&nbsp;<A 
name=283010>&nbsp;</A>逃&nbsp;发表于2004-09-16 12:35:00&nbsp;&nbsp;IP: 
218.61.49.*</DIV>
<DIV class=postText>归纳得不错,但有点过于简单了!对OPC入门较好!</DIV></DIV><BR>
<DIV class=post>
<DIV class=postTitle><A title="permalink: 回复:VB,VC开发OPC客户程序必读!" 
href="http://blog.csdn.net/freeboy20sui/articles/104073.aspx#283042">#</A>&nbsp;<A 
name=283042>&nbsp;</A><A href="http://blog.csdn.net/freeboy20sui" target=_blank 
rel=nofollow>freeboy</A>&nbsp;发表于2004-09-16 12:41:00&nbsp;&nbsp;IP: 
218.11.8.*</DIV>
<DIV class=postText>从工控OPC论坛转过来的,不是原创特此声明^_^</DIV></DIV><BR>
<DIV class=post>
<DIV class=postTitle><A title="permalink: 回复:VB,VC开发OPC客户程序必读!" 
href="http://blog.csdn.net/freeboy20sui/articles/104073.aspx#284253">#</A>&nbsp;<A 
name=284253>&nbsp;</A>深山野人&nbsp;发表于2004-09-18 09:47:00&nbsp;&nbsp;IP: 
202.119.24.*</DIV>
<DIV class=postText>IOPCAsyncIO接口还是OPCDA 
1.0规范的接口,2.0规范用的是IOPCAsyncIO2接口,3.0规范中IOPCAsyncIO接口已经不用了,增加了IOPCAsyncIO3接口。</DIV></DIV><BR>
<DIV class=post>
<DIV class=postTitle><A title="permalink: 回复:VB,VC开发OPC客户程序必读!" 
href="http://blog.csdn.net/freeboy20sui/articles/104073.aspx#322652">#</A>&nbsp;<A 
name=322652>&nbsp;</A>扬风飞雪&nbsp;发表于2004-12-11 15:17:00&nbsp;&nbsp;IP: 
219.232.57.*</DIV>
<DIV class=postText>看了感觉很有收获。谢谢楼主了 
<BR>我现在也是在学习OPC,一头雾水,不知从何做起</DIV></DIV><BR></DIV></SPAN></SPAN>
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