The PrepareForUpdateStateMachineType may be used if the device requires to be prepared before the update. Another option is to delay the resuming of normal operation until all update actions are executed. This supports to prepare for update option of 8.3.4.2.

If a Server implements this state machine, a Client shall use it except if the UpdateBehavior indicates that this is not necessary for the transferred software. If preparation is required, the installation is only allowed if the PrepareForUpdateStateMachine is in the PreparedForUpdate state.

The state machine is illustrated in Figure 47, Figure 48 and formally defined in Table 74. The transitions are formally defined in Table 76.

image050.png

Figure 47 – PrepareForUpdate state machine

image051.png

Figure 48 – PrepareForUpdateStateMachineType

Table 74 – PrepareForUpdateStateMachineType definition

Attribute

Value

BrowseName

PrepareForUpdateStateMachineType

IsAbstract

False

References

NodeClass

BrowseName

DataType

TypeDefinition

ModellingRule

Subtype of the FiniteStateMachineType defined in OPC 10000-5.

HasComponent

Variable

PercentComplete

Byte

BaseDataVariableType

Optional

HasComponent

Method

Prepare

Mandatory

HasComponent

Method

Abort

Mandatory

HasComponent

Method

Resume

Optional

HasComponent

Object

Idle

InitialStateType

HasComponent

Object

Preparing

StateType

HasComponent

Object

PreparedForUpdate

StateType

HasComponent

Object

Resuming

StateType

HasComponent

Object

IdleToPreparing

TransitionType

HasComponent

Object

PreparingToIdle

TransitionType

HasComponent

Object

PreparingToPreparedForUpdate

TransitionType

HasComponent

Object

PreparedForUpdateToResuming

TransitionType

HasComponent

Object

ResumingToIdle

TransitionType

Conformance Units

DI SU PrepareForUpdate

The component Variables of the PrepareForUpdateStateMachineType have additional Attributes defined in Table 75.

Table 75 – PrepareForUpdateStateMachineType Attribute values for child Nodes

BrowsePath

Value Attribute

Idle

0:StateNumber

1

Preparing

0:StateNumber

2

PreparedForUpdate

0:StateNumber

3

Resuming

0:StateNumber

4

IdleToPreparing

0:TransitionNumber

12

PreparingToIdle

0:TransitionNumber

21

PreparingToPreparedForUpdate

0:TransitionNumber

23

PreparedForUpdateToResuming

0:TransitionNumber

34

ResumingToIdle

0:TransitionNumber

41

Table 76 – PrepareForUpdateStateMachineType Additional References

SourceBrowsePath

Reference Type

Is Forward

TargetBrowsePath

Transitions

IdleToPreparing

FromState

True

Idle

ToState

True

Preparing

HasEffect

True

TransitionEventType

PreparingToIdle

FromState

True

Preparing

ToState

True

Idle

HasEffect

True

TransitionEventType

PreparingToPreparedForUpdate

FromState

True

Preparing

ToState

True

PreparedForUpdate

HasEffect

True

TransitionEventType

PreparedForUpdateToResuming

FromState

True

PreparedForUpdate

ToState

True

Resuming

HasEffect

True

TransitionEventType

ResumingToIdle

FromState

True

Resuming

ToState

True

Idle

HasEffect

True

TransitionEventType