4.5.3 Interface IFdtCommunication

Available since FDT 1.2.0.0

Mandatory for:
Never implemented by:

This interface is the communication entry point of a channel with communication functionality. The connection of this interface with a following component builds the chain for nested communication. The communication pointer to the following communication component can be requested at the DTM which owns the communication channel. A channel is able to support a number of different fieldbus protocols. Protocol specific XML documents are exchanged between communication channel and connected client via the IFdtCommunication and IFdtCommunicationEvents interfaces. The type of protocol to be used must be specified with a connect request. Dividing a communication function call to a request and a response function causes a non-blocking behavior. The DTM sends one or several requests to the next communication component. For the next communication component it is not allowed to send the response to the corresponding response method within the request method.