5 Modelling Approach of ISA-95

The modelling approach for generating a UA model from the ANSI/ISA-95 Part 3 specification follows the following general concepts.

  • An OPC UA server may support the activity of receiving unsolicited Job Orders for processing.
  • An OPC UA server may support the activity of receiving unsolicited requests for Job Responses.
  • An OPC UA server may support the activity of receiving unsolicited Job Responses.
  • Data types from the ISA-95 model are mapped to OPC UA DataTypes (i.e. strings if localized are mapped to LocalizedText).