16
Example: dST for window function
Condition
Reaction
1 Volumetric flow quantity Q reaches LFC
dST starts, output becomes active�
2 dST elapsed, Q reached good range
output remains active
3 Q above SP (leaves good range)
output is reset
4 Q again below SP
output becomes active again
5 Q below rP (leaves good range)
output is reset again
6 Q reaches again LFC
dST starts, output becomes active
7 dST elapsed, Q has not reached good
range
output is reset
8 Q reaches good range
output becomes active
4.11 Low flow cut-off (LFC)
With this function small volumetric flow quantities can be ignored (→ 10.6.13).
Flows below the LFC value are evaluated by the sensor as standstill (Q = 0)�
4.12 Simulation
With this function small volumetric flow quantities can be suppressed (→ 10.7.3).
The simulation does not have any effect on the totaliser or the current flow� The
outputs operate as previously set�
When the simulation starts, the value of the totaliser is saved and then the
simulated totaliser is set to 0� The simulated flow value then has an effect on the
simulated totaliser� When the simulation is finished, the original totaliser value is
restored�
