MDIS OPC UA Companion Specification

Table 91 defines the valid states for the ChokeMoveEnum.

Name	Value	Description
Moving	1	The choke is currently moving (in progress)
Stopped	2	The move has stopped

Its representation in the AddressSpace is defined in Table 94.

Table 92 – ChokeMoveEnum Definition

Attribute	Value
BrowseName	ChokeMoveEnum
IsAbstract	False
References	NodeClass	BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable	0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits

8.1.2 ChokeCommandEnum

Table 93 defines the valid states for the ChokeCommandEnum.

Table 93 – ChokeCommandEnum Items

Name	Value	Description
Close	1	The command to the Choke is Close
Open	2	The command to the Choke is Open

Its representation in the AddressSpace is defined in Table 94.

Table 94 – ChokeCommandEnum Definition

Attribute	Value
BrowseName	ChokeCommandEnum
IsAbstract	False
References	NodeClass	BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable	0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Choke Base

8.1.3 SetCalculatedPositionEnum

Table 93 defines the valid states for the SetCalculatedPositionEnum.

Table 95 – SetCalculatedPositionEnum Items

Name	Value	Description
Initial	0	no command (initial state)
Inprogress	1	command in progress
Complete	2	command completed
Fault	4	command fault

Its representation in the AddressSpace is defined in Table 96.

Table 96 – SetCalculatedPositionEnum Definition

Attribute		Value
BrowseName		SetCalculatedPositionEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Choke Base

8.1.4 SignatureStatusEnum

Table 97 defines the valid states for the SignatureStatusEnum.

Table 97 – SignatureStatusEnum Items

Name	Value	Description
NotAvailable	1	The profile / signature is not available (in progress)
Completed	2	The profile / signature request has completed
Failed	4	The profile / signature request has failed

Retrieval of a signature is outside of the scope of this interface. A NotAvailable_1 indicates that the current profile / signature request is not available.

Its representation in the AddressSpace is defined in Table 98.

Table 98 – SignatureStatusEnum Definition

Attribute		Value
BrowseName		SignatureStatusEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Valve SignatureRequestStatus

8.1.5 CommandEnum

Table 99 defines the valid states for the CommandEnum. This might not be the actual state of the valve, it is just the last command sent to the valve.

Table 99 – CommandEnum Items

Name	Value	Description
Close	1	The last command to the valve was Close
Open	2	The last command to the valve was Open
None	4	No known command has been sent to the valve. The initial setting on start-up of a server.

Its representation in the AddressSpace is defined in Table 100.

Table 100 – CommandEnum Definition

Attribute		Value
BrowseName		CommandEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Valve Base

8.1.6 SEMEnum

Table 101 defines the valid states for the SEMEnum.

Table 101 – SEMEnum Items

Name	Value	Description
SEM_A	1	Valve move command selection SEM A
SEM_B	2	Valve move command selection SEM B
Auto	4	Subsea equipment vendor decides how to send the command. In some cases, this would be both SEMs, in others it would mean a subsea system’s choice of a SEM.

Its representation in the AddressSpace is defined in Table 102

Table 102 – SEMEnum Definition

Attribute		Value
BrowseName		SEMEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Valve Base

8.1.7 ValvePositionEnum

Table 103 defines the valid states for the ValvePositionEnum.

Table 103 – ValvePositionEnum

Name	Value	Description
Closed	1	The Valve is Closed
Open	2	The Valve is Open
Moving	4	The Valve is Moving
Unknown	8	The Valve is in an unknown state. This value can be used when a subsea vendor does not have any last command information and does not know the state of the valve.

Its representation in the AddressSpace is defined in Table 104

Table 104 – ValvePositionEnum Definition

Attribute		Value
BrowseName		ValvePositionEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Valve Base

8.1.8 CIMVOperationModeEnum

Table 105 defines the valid states for the CIMVOperationModeEnum.

Table 105 – CIMVOperationModeEnum Items

Name	Value	Description
Position	1	The CIMV is in closed-loop Position control mode. Sending fix position
Flow	2	The CIMV is in closed-loop Flow control mode (auto regulate)
Manual	4	The CIMV is in open-loop Manual mode (compare it to step mode – i.e., move some increment relative to current). Note: some CIMV instance may not support this mode.

Its representation in the AddressSpace is defined in Table 106.

Table 106 – CIMVOperationModeEnum Definition

Attribute		Value
BrowseName		CIMVOperationModeEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits

8.1.9 CIMVMoveEnum

Table 107 defines the valid states for the CIMVMoveEnum.

Table 107 – CIMVMoveEnum Items

Name	Value	Description
MoveClose	1	The CIMV is moving in the close direction
MoveOpen	2	The CIMV is moving in the open direction
Stop	4	The CIMV is not moving

Its representation in the AddressSpace is defined in Table 108.

Table 108 – CIMVMoveEnum Definition

Attribute		Value
BrowseName		CIMVMoveEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS CIMV Base

8.1.10 ArbitrationModeEnum

Table 107 defines the valid states for the ArbitrationModeEnum.

Table 109 – ArbitrationModeEnum Items

Name	Value	Description
Average	1	Build the average of both values (if both available)
DefaultA	2	Select SourceA (if available), else SourceB
DefaultB	4	Select SourceB (if available), else SourceA
ForceA	8	Always select SourceA
ForceB	16	Always select SourceB
High	32	Highest Value (for digital this is an OR operation)
Low	64	Lowest Value (for digital this is an AND operation)

Its representation in the AddressSpace is defined in Table 110

Table 110 – ArbitrationModeEnum Definition

Attribute		Value
BrowseName		ArbitrationModeEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Instrument Arbitration Base

8.1.11 MotorStateEnum

Table 107 defines the valid states for the MotorStateEnum.

Table 111 – MotorStateEnum Items

Name	Value	Description
Active	1	The Motor is in active state
NonActive	2	The Motor is not in active state

Its representation in the AddressSpace is defined in Table 112.

Table 112 – MotorStateEnum Definition

Attribute		Value
BrowseName		MotorStateEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Motor Base

8.1.12 MotorOperationEnum

Table 107 defines the valid states for the MotorOperationEnum.

Table 113 – MotorOperationEnum

Name	Value	Description
Off	1	The Motor cannot be started either automatically or manually
Auto	2	The Motor works automatically
Manual	4	The Motor is controlled manually

Its representation in the AddressSpace is defined in Table 114.

Table 114 – MotorOperationEnum Definition

Attribute		Value
BrowseName		MotorOperationEnum
IsAbstract		False
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of the Enumeration type defined in OPC 10000-5
0:HasProperty	Variable		0:EnumValues	0:EnumValueType[]	0:PropertyType
ConformanceUnits
MDIS Motor Base

8.2 Structures

8.2.1 MDISVersionDataType

The MDISVersionDataType provides a single structure that provides all of the version information for the Server. There is a corresponding variable structure that provides each of the elements.

This VariableType is defined in 7.2.

Table 115 – MDISVersionDataType Structure

Name	Type	Description
MDISVersionDataType	Structure	Information that describes MDIS Specification version.
MajorVersion	0:Byte	The Major Version number from the specification
MinorVersion	0:Byte	The minor version number from the specification
Build	0:Byte	The BuildNumber associated – typically always 0