OPERATION
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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)
