The MDISElectricChokeObjectType is a basic component of any subsea control system. Subsea and surface trees have a choke valve and it is used for regulating the flow volume and with it the back pressure of liquids or gas. This document will address the electric choke valve found in subsea production and water injection trees. Implementation shall ensure adherence to Mandatory [M] aspects in order to comply with the MDIS interface standardisation. Optional [O] may or may not be implemented within a project. Figure 14 provides an overview of the Choke Object as defined by MDIS. It includes all items that are defined by the MDISBaseObjectType. It illustrates that an interlock might have one or more Interlock variables associated with it, or that they might not have an actual interlock associated.

Figure 15 – MDISElectricChokeObjectType