Cerabar M, Deltabar M, Deltapilot M Operation
Endress+Hauser 59
6.4.6 Block model
With FOUNDATION Fieldbus, all the device parameters are categorized according to their
functional properties and task and are generally assigned to three different blocks.
A FOUNDATION Fieldbus device has the following block types:
• A Resource Block (device block):
This block contains all the device-specific features of the device.
• One or more Transducer Blocks
A Transducer Block contains all the measuring and device-specific parameters of the
device. The measuring principles, such as pressure or totalizers, are mapped in the
Transducer Blocks.
• One or more function blocks:
Function blocks contain the automation functions of the device. A distinction is made
between different function blocks such as the Analog Input Block or PID Block. Each of
these function blocks is used to execute different application functions.
The function blocks can be connected by means of an FF configuration program, depending
on the automation task. The device thus takes on simple control functions, thereby relieving
the workload on the higher-order process control system.
The device has the following blocks:
• Resource Block (device block)
• 3 Transducer Blocks for all devices
– Pressure Transducer Block
This Block returns the output variables Primary Value/PRIMARY_VALUE and
Secondary Value/SECONDARY_VALUE. It contains all the parameters to configure the
measuring device for the measuring task such as measuring mode selection,
linearization function and unit selection.
– Display Transducer Block
This Block does not return any output variables. It contains all the parameters for
configuring the onsite display, such as Language/DISPLAY_LANGUAGE.
– Diagnostic Transducer Block
This Block does not return any output variables. It contains the simulation function for
the Pressure Transducer Block, parameters to configure the alarm response.
• In addition, 1 Transducer Block for Deltabar M
–DP_FLOW Block
This Block supplies the output variable Totalizer 1/TOTALIZER_1 and Totalizer 2/
TOTALIZER_2. It contains all the parameters required for configuring these totalizers.
• Function blocks in all devices
– 2 Analog Input Blocks (AI) (permanent block - cannot be deleted)
– Discrete Output Block (DO) (permanent block - cannot be deleted)
– Discrete Input Block (DI) (permanent block - cannot be deleted)
– Input Selector Block (ISB) (permanent block - cannot be deleted)
– PID Block (PID) (non-permanent block - can be deleted)
– Arithmetic Block (ARB) (non-permanent block - can be deleted)
– Signal Characterizer Block (SCB) (non-permanent block - can be deleted)
– Integrator Block (IT) (non-permanent block - can be deleted)
In addition to the pre-instantiated blocks already mentioned, the following blocks can also
be instantiated:
With Deltabar M:
• 3 Analog Input Blocks (AI)
• 4 Discrete Input Blocks (DI)
• 1 Discrete Output Block (DO)
• 2 Input Selector Block (ISB)
•2 PID Blocks (PID)
• 2 Arithmetic Blocks (ARTH)
• 2 Signal Characterizer Blocks (SCB)
• 2 Integrator Blocks (IT)
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