OPC Client  development for PLC tag monitor

Posted on 2009-12-29
Last Modified: 2013-12-26
I am trying to create a VB .net application that monitors an OPC tag that is selectable by the user. The user chooses the Machine, ProgID, and ItemID. THe software will monitor this tag

I know there are a number of OPC client development packages out there that should help me with this. I have purchased the Software Toolbox Top Server Extender to try and go that route, but i am open to something else if it works.

My biggest issue i have encountered is the lack of sample code and guides to help me do this.

Any advice?
Question by:michael_krell
    LVL 10

    Expert Comment

    You have tried these samples?

    Can you be a bit more specific with your problem.
    LVL 1

    Accepted Solution

    Code samples specific to the Software Toolbox Extender may be found at:

    The link that 3_S posted also contains a sample that I think can help you - specifically the one titled
    "OPC DA Client using .NET Extenders" on the page

    Lastly, please also feel free to contact Software Toolbox support on  - if you can be specific about any problems that you our having the Software Toolbox team can assist you further as needed.  

    Featured Post

    Highfive + Dolby Voice = No More Audio Complaints!

    Poor audio quality is one of the top reasons people don’t use video conferencing. Get the crispest, clearest audio powered by Dolby Voice in every meeting. Highfive and Dolby Voice deliver the best video conferencing and audio experience for every meeting and every room.

    Join & Write a Comment

    Background What I'm presenting in this article is the result of 2 conditions in my work area: We have a SQL Server production environment but no development or test environment; andWe have an MS Access front end using tables in SQL Server but we a…
    This article will show, step by step, how to integrate R code into a R Sweave document
    Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
    In this seventh video of the Xpdf series, we discuss and demonstrate the PDFfonts utility, which lists all the fonts used in a PDF file. It does this via a command line interface, making it suitable for use in programs, scripts, batch files — any pl…

    746 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    13 Experts available now in Live!

    Get 1:1 Help Now