Transducer Block Function Groups - Siemens SITRANS L Operating Instructions Manual

Analog Input Function Blocks AIFB1 and AIFB2
The two AIFBs are completely independent of each other. They utilize the measurement value
output from the Transducer Block [Primary Value (PV), Secondary Value 1 (SV1), or Secondary
Value 2 (SV2)] and apply any required quality checks, scaling, and Fail-safe operation
selections. The Analog Input Function Block output supplies the measured value and
associated status information to the PROFIBUS PA network via cyclic data transfer.
D.3

Transducer Block function groups

The figure below shows the signal flow of measured values from the sensor through the
Transducer Block into the output value:
• Primary Value (PV): Level or Volume
• Secondary Value 1 (SV1): Level
• Secondary Value 2 (SV2): Distance
The Transducer Block implements all of the basic parameters (see diagram below), including
level to volume calculation, if that option has been selected.
Transducer Block
SITRANS LR200 with PROFIBUS PA
Operating Instructions, 07/2021, A5E32337680-AF
PROFIBUS PA profile structure
D.3 Transducer Block function groups
195