You have the option of installing additional interfaces after installation of the TIA Portal.
Procedure
To install an interface at a later time and add it to the TIA Portal, follow these steps:
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Install or update the drivers in the operating system once you have installed the interface hardware.
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Close the TIA Portal if it is still open.
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Open the Windows control panel.
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Open the entry "Setting the PG/PC Interface" in the Control Panel.
The "Setting the PG/PC Interface" dialog opens.
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Make any necessary changes to the interface configuration and confirm them with "OK". You have to click "OK", even if you have not made any changes.
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Restart the TIA Portal.
Result
The newly installed interface is now displayed in the project tree under the "Online access" folder.