Wiesemann & Theis GmbH

Networking, sensors and interface technology for industry, office and IT

Application for the Web-IO Digital:

Detect and control switching signals with OPC DA

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Classical OPC has over the years developed into a standard in the industrial field for combining process data from components made by various manufacturers.

Capture switching signals with OPC DA

But many controllers, components and machines are unable to provide the possibility of an OPC connection.

In most cases, operating states are simply indicated using potential-free contacts. With our Web-IO Digital products you can monitor such contacts and use the free W&T OPC server to detect and further process them as OPC items on the control level.

Preparations

Configuring Web-IO for access via OPC DA

For access via OPC DA to take place, the Web-IO must already have an IP address.

  • To change the configuration of the Web-IO you first need to obtain the necessary access rights by entering the administrator password.

    Acquire switching signals via OPC DA

  • First check whether all the IP parameters are correctly configured. Especially when the Web-IO is not located in the same subnet as the control computer it is important that a gateway is entered. To do this, to to the menu tree Basic settings >> Network and there Basic network settings.

    Acquire switching signals via OPC DA

  • All the configuration changes must be confirmed using the Apply button.

  • To configure the OPC DA access, go to the menu tree Communication paths >> OPC DA.

    Acquire switching signals via OPC DA

  • If the outputs can be operated using OPC DA, they must be enabled accordingly.

  • The W&T OPC-Server must be installed on the control computer. The installation file can be downloaded here at no cost.

  • After successful installation, go to the W&T OPC configuration under Device to add the Web-IO as a new I/O device.

    Acquire switching signals via OPC DA

  • The OPC Server should automatically identify the Web-IO model ...

    Acquire switching signals via OPC DA

  • ... and add it to the inventory list.

    Acquire switching signals via OPC DA

  • Finally you must save the current configuration.

    Acquire switching signals via OPC DA

  • The Web-IO should now be visible under OPC-Server >>Demo-Client with all the items.

    Acquire switching signals via OPC DA

  • If Parameter Quality Good shows for all items, other OPC DA clients should also have access to the IOs of the Web-IO.

You don’t have a Web-IO yet but would like to try the example out sometime?

No problem: We will be glad to send you a unit at no charge for 30 days. Simply fill out the sample order form and we will ship the Web-IO on open invoice for testing. If you return the device within 30 days, we will cancel the invoice.

To the Web-IOs

Are you still uncertain which Web-IO is best for your needs?

Our qualified team of engineers will be glad to assist you.
You can reach us by telephone at +49 202/2680-110 or by email at info@wut.de.


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