4.3.18 Interface IDtmSingleDeviceDataAccess

Available since FDT 1.2.1.0

Mandatory for:
Typically implemented by:
Optionally implemented by:
Never implemented by:

This interface allows a Frame Application the online access to specific parameters of a device. This interface is implemented in an asynchronous way. The data in the device can be accessed by multiple threads of the Frame Application. For example: the Frame Application can perfom a IDtmOnlineParameter::DownloadRequest() in parallel to a WriteRequest() via this interface. The DTM must be prepared for multiple asynchronous requests in parallel. The requests must be processed in the order received. IDtmSingleDeviceDataAccess methods must not modify the instance data set , but must taken the attribute ‘modifiedInDevice’ (see FDTDataTypesSchema) into account.