The power cycle option is intended for devices where a manual power cycle is required. During the installation the state WaitingForPowerCycle informs the user that it is time to turn the power off and on again. The PowerCycleStateMachineType is defined in 8.4.10.
This power cycle state machine is used in combination with the installation. For Cached-Loading it may be used in the Installing state of the InstallationStateMachineType. For Direct-Loading it may be used during the transfer of the new software with the TemporaryFileTransferType (OPC 10000-5) of the DirectLoadingType.