MDIS - Subsea to Topside

Scope / Goals

An Oil and Gas standard for interfacing the Subsea Production Control System (SPCS) via a Master Control Station (MCS) or a Subsea Gateway to the topside Distributed Control System (DCS).

The focus of MDIS is on the interface between the MCS and the DCS, in order to simplify this communication channel the MDIS network will define standard objects through which data relating to physical subsea components will pass through the interface, standardize the implementation of these objects and define a procedure for testing and certifying products to ensure compliance to the MDIS standard.

Technical Content

This standard is an oil and gas standard for interfacing the Subsea Production Control System (SPCS) with a Master Control Station (MCS) or a Subsea Gateway to the Distributed Control System (DCS).This specification includes:

• A description of common terminology
• Supported architectures
• Information models representing the data that is shared between the systems
• Methods used in the flow of Information
• Profile & Conformance Units describing the grouping of functionality
• Recommended Practices for the use of MDIS.

MDIS was created to define a standard object model that is transported on a common high performance efficient interface between topside and subsea systems in oil and gas installations. The selected protocol (OPC UA) includes independent third party certification.