《VB开发OPC客户端》.pdf

Using Visual Basic As An OPC Client Your OPC Server John Weber President Founder Software Toolbox, Inc. jweber@ Presentation Updated 3/2001 website: Copyright Software Toolbox, 1999,2000,2001 All Rights Reserved Worldwide. Software Toolbox is a registered trademark of Software Toolbox, Inc. VB OPC Agenda • OPC - Review of the Basics • OPC - Terminology • OPC VB 101 - Automation Wrapper Object Model • Building Your VB Client - Read data - 7 easy steps with code from start to finish • Housekeeping • Handles Handles Everywhere - how the server and client correlate the data each is managing in your program • Writing Data • Future ideas to consider • New developments since original presentation in 10/99 • Resources for future learning Copyright Software Toolbox, 1999,2000,2001 All Rights Reserved Worldwide. Software Toolbox is a registered trademark of Software Toolbox, Inc. VB OPC OPC - Review of the Basics • OPC is based on the Microsoft Component Object Model (COM) • OPC stands for OLE for Process Control • OPC is managed by the independent OPC Foundation () • There are over 200 member companies supporting the OPC specification • OPC defines a standard method for connecting automation application software Copyright Software Toolbox, 1999,2000,2001 All Rights Reserved Worldwide. Software Toolbox is a registered trademark