Endress+Hauser Proline Promag 55 Operating Manual page 69

Device functions Proline Promag 55 FOUNDATION Fieldbus
Endress+Hauser
1 Operation via FOUNDATION Fieldbus
1.1 Block model
In the FOUNDATION Fieldbus all the device parameters are categorized according to their
functional properties and task and are generally assigned to three different blocks. A block may be
regarded as a container in which parameters and the associated functionalities are contained. A
FOUNDATION Fieldbus device has the following block types:
• A Resource Block
The Resource Block contains all the device-specific characteristics of the device.
• One or more Transducer Blocks (transmission blocks)
The Transducer Block contains all the measuring technology and device-specific parameters of the
device. The measurement principles (e.g. flow, temperature) are depicted in the Transducer
Blocks in accordance with the FOUNDATION Fieldbus specification.
• One or more function blocks
Function blocks contain the automation functions of the device. We distinguish between different
function blocks, e.g. Analog Input function block, Analog Output function block, PID function
block (PID controller), etc. Each of these function blocks is used to process different application
functions.
Different automation tasks can be realized depending on the arrangement and connection of the
individual blocks. In addition to these blocks, a field device may have any number of other blocks,
e.g. several Analog Input function blocks if more than one process variable is available from the field
device.
Blocks used by the Promag 55 FOUNDATION Fieldbus:
• One Resource Block
• Four Transducer Blocks
• Eleven function blocks comprising:
– Five Analog Input function blocks for the process variables Volume Flow, Calculated Mass Flow
and Totalizer 1 to 3.
– One Discrete Output function block
– One PID function block (PID controller)
– One Arithmetic function block
– One Input Selector function block
– One Signal Characterizer function block
– One Integrator function block
1 Operation via FOUNDATION Fieldbus
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