Table 10 defines the structure of an MDISDiscreteOutObjectType. Any vendor specified properties that have been implemented within a project should be documented within a similar format and supplied to the DCS vendor. The addition of vendor specific properties will result in a subtype of the MDISDiscreteOutObjectType.

Table 10 – MDISDiscreteOutObjectType Definition

Attribute	Value
BrowseName	MDISDiscreteOutObjectType
IsAbstract	False
References	Node Class	BrowseName	DataType	TypeDefinition	Other
Subtype of the MDISDiscreteInstrumentObjectType (see section 6.1.2)
0:HasComponent	Method	WriteValue	See 6.3.5		M
ConformanceUnits
MDIS Discrete Out Base

WriteValue – This Method allows a Client to change the value of State on an instance of MDISDiscreteOutObjectType. The Method will return any errors that occurred on setting the value. The Client shall verify that the State actually changed to confirm the update. If the instrument is disabled, an error Bad_InvalidState shall be returned.