1 PROFIBUS-PA communication
The PROFIBUS-PA is a fieldbus version for process automation based on the widely used
PROFIBUS-DP. The transmission technique conforms with the IEC 61158-2 standard and
therefore fulfills the requirements for the type of protection, intrinsic safety.
PROFIBUS-DP defines two types of masters:
4
Class 1 master exchanges the data with the configured slaves.
4
Class 2 master is used for acyclic data exchange for commissioning and diagnostics pur-
poses.
2 Profile
Basic device functions have been described in profiles by PNO (PROFIBUS user organiza-
tion) to supplement the EN 50170 standard.
The scope of functions of the Type 3730-4 Positioner is consistent with Profile 3.01 for final
control elements. However, it still fulfills all obligatory functions of Profile 3.02, e.g. the auto-
matic implementation on replacing old device models and versions or concerning the con-
densed state according to the NAMUR Recommendation NE 107.
6 KH 8384-4 EN
PROFIBUS-PA communication
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