KROHNE UFC 400 FOUNDATION FIELDBUS EN - Manual (Page 9)

OPERATION
4
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UFC 400
www.krohne.com 05/2013 - 4002813701 - AD FF UFC 400 R01 en
4.2 Description of the FF block system
The Foundation Fieldbus is a Local Area Network (LAN) for connecting field devices like sensors
and actuators. One of the main benefits of Foundation Fieldbus is line saving in comparison to
the traditional 4...20 mA technology.
The different device functions are implemented in a block-based scheme within a user
application. In this block scheme, a distinction is made between the Resource Block, Transducer
Block and Function Block.
4.3 Used abbreviations
1 Resource Block (RB)
2 Transducer Block (TB)
3 Function Block (FB)
4 Device FF communication
5 Foundation Fieldbus
AI Analogue Input Block BLK Block mode
IT Integrator Block MAN Manual mode
PID Proportional Integral Derivate Block Mix Mix mode (R, W and R/W)
RB Resource Block Auto Automatic mode
TB Transducer Block OOS Out Of Service mode
R Read OD Object Directory
W Write SP Set Point
R/W Read and Write IV Initial Value
PV Process Value (factory settings)