prEN ISO 16484-3

This Part 3 of the standard specifies in clause 5 the functions for control, building automation and technical building management which contribute to the energy performance of buildings as listed in EN ISO 52120-1, table 5.
This part of the standard further provides in clause 6 means for functional specification of requirements for the overall functionality and engineering services to achieve building automation and control systems. It defines terms, which shall be used for specifications and it gives guidelines for the functional documentation of project/application specific systems. It provides a sample template for documentation of plant/application specific functions, called BACS points list in informative annex A.
The informative function block examples explain a method to display the referenced functions in system documentation; they do not standardize the method for programming functions and applications.