IEC 61158-3-14:2014 defines the services provided to the Type 14 fieldbus application layer at the boundary between the application and data-link layers of the fieldbus reference model and systems management at the boundary between the data-link layer and systems management of the fieldbus reference model. This third edition cancels and replaces the second edition published in 2010. It constitutes a technical revision. The main changes are: - update the Communication model; - update the primitives and parameters of the DL-management service for FRT applications in 5.4.2; - correct the edit error; - update of the requirements for all conformance classes; - update of the requirements for all conformance services.