PROline Prosonic Flow 93 PROFIBUS-DP/-PA 5 Operation
Endress+Hauser 65
Project planning
For additional project planning information on the PROFIBUS-DP fieldbus, see
the Operating Instructions BA 198F/00/en “Field Communication - PROFIBUS-DP/-PA:
Guidelines 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 following blocks can be implemented in field devices in accordance with Profile 3.0:
Physical Block:
The Physical Block contains all device-specific characteristics.
Transducer Block (transmission block):
One or more Transducer Blocks contain all the device's measurement-related and
device-specific parameters. The measurement principles (e.g. flow rate and
temperature) are mapped in the Transducer Blocks in accordance with the PROFIBUS
specification.
Function block:
One or more function blocks contain the device's automation functions.
We distinguish 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.
More information is provided in the “Description of Device Functions” manual.
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