6.2.2.3 Method ReadSafetyData

This Method is mandatory for the Facet SafetyProviderServerMapper. It is used to read SafetyData from the SafetyProvider. It is in the responsibility of the safety application that this Method is not concurrently called by multiple SafetyConsumers. Otherwise, the SafetyConsumer can receive invalid responses resulting in a safe reaction which can lead to either spurious trips or system unavailability, or both.

See Table 7 for Method ReadSafetyData’s arguments and Table 8 for its AdressSpace definition.

The Method argument OutSafetyData has an application-specific DataType derived from Structure. This DateType (including the DataTypeID) is expected to be the same in both the SafetyProvider and the SafetyConsumer. Otherwise, the SafetyConsumer will not accept the transferred data and switch to fail-safe substitute values instead (see state S16 in Table 34 as well as 7.2.3.2 and 7.2.3.5). The Method argument OutNonSafetyData has an application-specific DataType derived from Structure.

Signature

	ReadSafetyData (
		[in]	UInt32	InSafetyConsumerID,
		[in]	UInt32	InMonitoringNumber,
		[in]	InFlagsType	InFlags,
		[out]	Structure	OutSafetyData,
		[out]	OutFlagsType	OutFlags,
		[out]	UInt32	OutSPDU_ID_1,
		[out]	UInt32	OutSPDU_ID_2,
		[out]	UInt32	OutSPDU_ID_3,
		[out]	UInt32	OutSafetyConsumerID,
		[out]	UInt32	OutMonitoringNumber,
		[out]	UInt32	OutCRC,
		[out]	Structure	OutNonSafetyData)
	;