IEC 61158-5-18:2007 defines the services provided to the FAL user at the boundary between the user and the Application Layer of the Fieldbus Reference Model, and SystemsManagement at the boundary between the Application Layer and Systems Management of the Fieldbus Reference Model. This standard specifies the structure and services of the Type 18 IEC fieldbus Application Layer, in conformance with the OSI Basic Reference Model (ISO/IEC 7498) and the OSI Application Layer Structure (ISO/IEC 9545). This first edition and its companion parts of the IEC 61158-5 subseries cancel and replace IEC 61158-5:2003. This edition of this part constitutes an editorial revision. This edition of IEC 61158-5 includes the following significant changes from the previous edition:
- deletion of the former Type 6 fieldbus for lack of market relevance;
- addition of new types of fieldbuses;
- partition of part 5 of the third edition into multiple parts numbered 5-2, 5-3,... This bilingual version (2014-12) corresponds to the monolingual English version, published in 2007-12.