Unsupported Data Types for OPC UA Applications

Specific data types are not supported for the subscription of OPC UA tags.

The data type is determined automatically during browsing for tags on the Subscription Items tab. However, the available data types might be restricted for technical reasons and in addition be limited by the types available in the .Net Framework. OPC UA applications in particular work partly with data types that are not supported.

• Data type Integer that comprises the types SByte, Int16, Int32, and Int64

• Data type UInteger that comprises the data types Byte , UInt16, UInt32, and UInt64

• Data type Number that comprises the types Integer, Double, Float, UInteger

In this case the tags are not offered for selection when you are browsing. They are displayed, but cannot be adopted into the list. If possible, you should configure your OPC UA server for interaction with SAP Plant Connectivity so that it only uses supported data types.

You can add unsupported data types manually and then select the data type manually. However, there is a risk of data loss if the value of such a variable at runtime does not match the type. (See also: Adding Tags.)