The user wants to identify which values of localization information are static or change while runtime, to reduce communication overhead.

This leads to the requirement:

  • Values should provide information if the value of a frame is static or changing while runtime

OPC UA Core Spec Part 3 v1.05.1 provides a Constant bit within the Attribute AccessLevelEx of a Variable. See an explanation for use in 7.1 RelativeValueType.