Web9 dec. 2016 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question.Provide details and share your research! But avoid …. Asking for help, clarification, or responding to other answers. Web16 okt. 2012 · LPSTR被定义成是一个指向以NULL(‘\0’)结尾的8位ANSI字符数组指针,而LPWSTR是一个指向以NULL结尾的16位双字节字符数组指针OPC接口说明IOPCServer*m_IOPCServer;IOPCServer接口及成员函数主要用于对组对象进行创建,删除,枚举和获取当前状态等操作.是OPC服务器对象的主要接口 ...
如何在 C#中实现 OPC 数据访问 - Siemens
Web服务器连接之后,可利用IOPCServer接口指针的AddGroup()方法来创建OPCGroup,因此需要使用上一步IUnknown接口指针ppUnknown的QueryInterface()方法来首先获取IOPCServer接口指针,代码为. ∥获取IOPCServer接口指针,成功hRet返回S- ... Web14 jun. 2012 · 原创: 这几天一直在研究OPCSERVER的开发.在网上找了好久,都没有C#成型的说明和源码.于是,自己拼凑,终于被我搞成功了. 一、32位操作系统,执行 OPCdist 库文件\opcdist\ 目录下的setupxp.bat 如果是64位的系统,请自己修改setupxp.bat批处理文件,我的操作系统是win7X64,是 ... crystal for sobriety
QT中的OpcDa 客户端 实现 - BBSMAX
WebAddGroup(String,Boolean,Int32,Int32) Add a new group. ( IOPCServer::AddGroup ) The OPC parameters DeadBand and LocaleId are set to zero. If any error occurs an … Web30 okt. 2024 · This indicates detection of the OPC DA IOPCServer AddGroup command. OPC (OLE for process control), currently known as "OPen Connectivity", is a standards … Web10 jan. 2024 · The pointers to other interfaces of the OPC server object can be obtained from the IOPCServer interface pointer via the QueryInterface function. 3. Creating a group object. With the obtaining of the pointer of IOPCServer, its AddGroup method can be called to create a group object with the pointer to its IUnknown interface. crystal for self love