14
4.9 Volumetric flow monitoring / frequency output
120
120
130
130
[%]
[%]
100
0
0
100
FrEP
FEP
Output curve frequency output
1: Frequency output
2: Volumetric flow quantity Q
3: The unit is in the error state (FOU = OFF) or the process value transmitted in an ana-
logue way is below the display range�
4: The unit is in the error state (FOU = ON)�
FrEP = configured frequency at FEP (→ 10.3.4 Setting the frequency value for volumetric
4.10 Start-up delay
The start-up delay dST influences the switching outputs of the volumetric
flow monitoring�
If the start-up delay is active (dST > 0), note: As soon as the volumetric flow
quantity exceeds the LFC (LFC = low flow cut-off → 4.11), the following processes
are carried out:
> The start-up delay is activated�
> The outputs switch as programmed:
ON for NO function, OFF for NC function�
After the start of the start-up delay there are 3 options:
1� The volumetric flow quantity increases quickly and reaches the set point / good
range within dST�
> Outputs remain active�