The InstallationStateMachineType may be used if the device supports explicit installation (Cached-Loading or File System based Loading). This supports the installation option of 8.3.4.6. It is illustrated in Figure 49 and Figure 50 and formally defined in Table 77. The transitions are formally defined in Table 79.

Figure 49 – Installation state machine

Figure 50 – InstallationStateMachine

Table 77 – InstallationStateMachineType definition

Attribute	Value
BrowseName	InstallationStateMachineType
IsAbstract	False
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the FiniteStateMachineType defined in OPC 10000-5.
HasComponent	Variable	PercentComplete	Byte	BaseDataVariableType	Optional
HasComponent	Variable	InstallationDelay	Duration	BaseDataVariableType	Optional
HasComponent	Method	InstallSoftwarePackage			Optional
HasComponent	Method	InstallFiles			Optional
HasComponent	Method	Resume			Mandatory
HasComponent	Object	Idle		InitialStateType
HasComponent	Object	Installing		StateType
HasComponent	Object	Error		StateType
HasComponent	Object	IdleToInstalling		TransitionType
HasComponent	Object	InstallingToIdle		TransitionType
HasComponent	Object	InstallingToError		TransitionType
HasComponent	Object	ErrorToIdle		TransitionType
Conformance Units
DI SU Software Update

The component Variables of the InstallationStateMachineType have additional Attributes defined in Table 78.

Table 78 – InstallationStateMachineType Attribute values for child Nodes

BrowsePath	Value Attribute
Idle 0:StateNumber	1
Installing 0:StateNumber	2
Error 0:StateNumber	3
IdleToInstalling 0:TransitionNumber	12
InstallingToIdle 0:TransitionNumber	21
InstallingToError 0:TransitionNumber	23
ErrorToIdle 0:TransitionNumber	31

Table 79 – InstallationStateMachineType Additional References

SourceBrowsePath	Reference Type	Is Forward	TargetBrowsePath
Transitions
IdleToInstalling	FromState	True	Idle
	ToState	True	Installing
	HasEffect	True	TransitionEventType
InstallingToIdle	FromState	True	Installing
	ToState	True	Idle
	HasEffect	True	TransitionEventType
InstallingToError	FromState	True	Installing
	ToState	True	Error
	HasEffect	True	TransitionEventType
ErrorToIdle	FromState	True	Error
	ToState	True	Idle
	HasEffect	True	TransitionEventType

This percentage is a number between 0 and 100 that informs the user about the progress of an installation. It should be used whenever an update activity takes longer and the user should be informed about the completion. If the state machine is in Idle State it shall have the value 0. In case of an error the last value should be kept until the Resume is called.

Note: This information is for the user only. It shall not be used to detect completion of the installation.

The optional InstallationDelay can be set by a Client to delay the actual installation after the call to InstallSoftwarePackage or InstallFiles is returned by the Server. This can be used when the installation is started on several devices in parallel and there is a risk that a reboot of one device could harm the connection to other devices. With a delay the install methods can be called on all devices before the devices actually start the installation. The InstallationDelay does not delay the transition from Idle to Installing.

This value could be preconfigured. If a Client wants to set this value it has to be done before the install method is called.

The Server is expected to stay operational at least during the delay.

With this Method the Client requests the installation of a Software Package. The package can be either the previously transferred Pending Version or the alternative Fallback Version. To identify the version and to prevent conflicts with a second Client that transfers a different version, the InstallSoftwarePackage Method needs the ManufacturerUri, the SoftwareRevision and PatchIdentifiers Properties of the SoftwareVersionType.

Optionally an additional hash value may be passed to the Method. This hash could be calculated by the Client or taken from a trusted source. Before installation the Server may compare the hash against the calculated hash of the Software Package. This mechanism can be used if there is a risk that the Software Package is altered during the transfer to the device and if the Server has no other mechanism to ensure that the Software Package is from a trustworthy source.

If the installation succeeds but the software cannot run properly this should not be treated as an error of the installation. Instead this should be indicated using the IDeviceHealthType Interface of the device / component.

This Method shall not return before the state has changed to the Installing state.

Signature

InstallSoftwarePackage(

[in] String ManufacturerUri,

[in] String SoftwareRevision,

[in] String[]PatchIdentifiers,

[in] ByteString Hash);

Argument	Description
ManufacturerUri	ManufacturerUri Property of either the Pending or Fallback SoftwareVersionType that should be installed.
SoftwareRevision	SoftwareRevision Property of either the Pending or Fallback SoftwareVersionType that should be installed.
PatchIdentifiers	PatchIdentifiers Property of either the Pending or Fallback SoftwareVersionType that should be installed. (or empty array if not supported on the SoftwareVersionType instance).
Hash	Hash of the Software Package that should be installed (or empty if not used).

Method Result Codes (defined in Call Service)

Result Code	Description
Bad_InvalidState	If the InstallationStateMachineType is not in Idle state or if the PrepareForUpdate Object is available and the PrepareForUpdate state machine is not in the state PreparedForUpdate.
Bad_NotFound	If the specified Software Package does not exist.
Bad_InvalidArgument	If the Hash does not match the calculated hash of the Software Package.

This Method may be called to request the installation of one or more files. The files are identified by the NodeId of their FileType instance in the FileSystem.

If the installation succeeds but the software cannot run properly this should not be treated as an error of the installation. Instead this should be indicated using the IDeviceHealthType Interface of the device / component.

Signature

InstallFiles(

[in] NodeId[] NodeIds);

Argument	Description
NodeIds	NodeIds of the files to install.

Method Result Codes (defined in Call Service)

Result Code	Description
Bad_InvalidState	If the InstallationStateMachineType is not in Idle state or if the PrepareForUpdate Object is available and the PrepareForUpdate state machine is not in the state PreparedForUpdate.
Bad_NotFound	If one or more NodeIds are not found.

This Method may be called to resume from the Error state. The Error state can be reached if there are issues during the installation. The state machine remains in this state until the Client calls the Resume Method to get back to the Idle state immediately.

Signature

Resume();

Method Result Codes (defined in Call Service)

Result Code	Description
Bad_InvalidState	If the InstallationStateMachineType is not in Error state.