Block types
● Resource block
The resource block contains device-specific information from the manufacturer.
Examples are:
– Manufacturer
– Device type
– Device number
– Serial number
– Hardware version
– Firmware version
● Function block
Function blocks provide information about the functions available in an FF device as well
as their tasks. The schedules of the clocked data transmission defined in the Schedule are
based on these function blocks. Accesses to the functions and their inputs and outputs are
defined via the function blocks. Each FF device has at least one function block.
Standard function blocks are defined in the FF specifications. The basis functions can be
described using these standard function blocks.
Examples are:
– AI: Analog input
– AO: Analog output
– B Offset (bias)
– CS Control selector
– DI: Digital input
– DO: Digital output
– ML: Manual loader
– PD: PD controller (proportional/derivative)
– PID: PID controller (proportional/integral/derivative)
– RA: Ratio controller
● Transducer block
You use transducer blocks to manipulate the input and/or output variables of a function
block.
Examples are:
– Calibration and conversion of measured and control data
– Linearization of characteristic curves
– Conversion of physical quantities using other process data
Objects of the block model
In PCS 7, applications in the PC stations assume the functions of FF-specific objects:
Engineering station
Basics of the FOUNDATION Fieldbus
2.4 Block model of device parameters
FOUNDATION Fieldbus
14 Commissioning Manual, 03/2013, A5E03880935-02
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