This specification describes how to communicate HART via PROFIBUS DP. The specification defines a HART application layer which guarantees an interoperable access between different applications and different HART Master Devices. The applications can run either on a PC connected directly to PROFIBUS or on a PC communicating via the system or on the controller itself.
The specification defines:
communication mechanism on PROFIBUS
PDUs on PROFIBUS
state machines
feature functionalities
This application layer specification does not specify individual implementations or products, nor does it constrain the implementations of application entities and interfaces within the industrial automation system.
This specification does not contain test procedures to ensure compliance with such requirements.
This specification standardizes the communication between client applications in HART compatible devices via PROFIBUS DP. Furthermore, it standardizes the nomenclature used with HART-capable PROFIBUS DP Slaves, their configuration, and their operation. This specification includes:
Definition of Data Type Application Service Elements,
Definition of HART Application Service Elements,
Definition of HART Profile Protocol Data Units,
Coding of HART Profile Protocol Data Units,
Definition of HART Master Device State Machines and
Definition of Device Data Base Key Words.
A mapping of HART variables into the cyclic PROFIBUS DP data will not be included in this revision. It is planned for coming revisions.
Any device claiming conformances must implement all the mandatory features.
