Siemens FST020 Function Manual page 69

Bidirectional flow with symmetrical scaling
①
②
③
④
⑤
⑥
⑦
Current output setting
● Process value = Mass flow
● Direction = Bidirectional (Symmetric)
● Loop current scale = 4-20 mA NAMUR
● Upper range value = 400 kg/h
● Lower range value = 100 kg/h
● Fail-safe behaviour = Upper fault current
● Low flow cut-off = 25 kg/h
Pulse output
The pulse output function supplies pulses equivalent to a configured amount of accumulated
volume or mass. The pulse width is configured and the pulse repetition is proportional to the
selected flow rate.
Pulse repetition
Pulse repetition is calculated as follows:
FST020 Function manual
Function Manual, 09/2017, A5E42949526-AA
Upper range value
Lower range value
Low flow cut-off
Upper fault current
Upper saturation limit
Lower saturation limit
Span
Setup
3.4 Inputs and outputs
67