The user of an OPC UA Client can uniquely identify all connected IO-Link Masters by their serial number information and devices by vendor and device ID to recognize the status of the devices and facilitate the exchange. For each IO-Link Device and the IO-Link Master, the following data are provided for reading only:

• IO-Link DeviceType Version (mandatory)
• IO-Link Protocol Version (mandatory)
• Vendor Name (mandatory)
• Product Name (mandatory)
• Product ID (mandatory)
• Serial Number (mandatory)
• Hardware Revision (optional)
• Software Revision (optional)
• Vendor Text (optional)
• Product Text (optional)
• Application Specific Tag (mandatory – see UC.005)
• Function Tag (optional)
• Location Tag (optional)
• Implicit topology information (address of IO-Link Master and port number, where the IO-Link Device is connected to)