5 Operation Promag 53 PROFIBUS-DP/-PA
72 Endress+Hauser
Note:
For additional project planning information about the PROFIBUS-DP fieldbus, see
the Operating Instructions BA 198F/00/en “Field communications - PROFIBUS-DP/-PA:
Guides for project planning and commissioning”.
Function blocks
The PROFIBUS uses predefined function blocks to describe the function blocks of a
device and to specify uniform data access.
The function blocks implemented in the fieldbus devices provide information on the
tasks which a device can perform as part of the whole automation strategy. The follow-
ing blocks can be implemented in field devices in accordance with Profile 3.0:
• Physical Block:
The Physical Block contains all the device-specific characteristics.
• Transducer Block (transmission block):
One or more transducer blocks contain all the device measurement and device-spe-
cific parameters. In the transducer blocks, the measurement principles (e.g. flow rate
and temperature) are mapped in accordance with the PROFIBUS Profile 3.0.
• Function Block:
One or more function blocks contain the device's automation functions. We distin-
guish between different function blocks, e.g. Analog Input Block, Analog Output
Block, Totalizer Block, etc. Each of these function blocks is used to process different
applications.
5.3.3 PROFIBUS-PA system architecture
Fig. 47: PROFIBUS-PA system architecture
1 = Automation control system, 2 = Commuwin II operating program, 3 = Segment coupler,
4 = PROFIBUS-DP RS 485 line (max. 12 MBit/s), 5 = PROFIBUS-PA IEC 61158-2 (max. 31.25 kbit/s)
General information
The Promag 53 can be equipped with a PROFIBUS-PA interface in accordance with the
fieldbus standard PROFIBUS-DP (EN 50170 Volume 2).
As a consequence, the Promag 53 can exchange data with automation control systems,
which satisfy this standard. The integration in a automation control system must be in
accordance with the PROFIBUS-PA Profile 3.0 specifications.
The selection of the international IEC 61158-2 (International Electrotechnical Commis-
sion) transmission standard ensures a future-proof field installation with PROFIBUS-PA.
PROFIBUS PA
3
1
2
4
5
5
F06-xxxPBxxx-02-xx-xx-xx-000
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