OPC UA, through the MDIS Companion Specification, has been specified as a controls interface between the MCS and DCS. This normative guideline provides details on other potential applications of the MDIS standard and additions to standard MDIS implementations that are outside the original scope of MDIS. Concepts covered include:

  1. Application of OPC UA and standard objects and concepts defined within the MDIS Companion Specification as “read only” interfaces for historian applications.
  2. Additions to OPC UA MDIS implementations that can facilitate data transfer that are not specifically control related.