Parameters
vacon • 129
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7.1.14.8
Group 3.13.8: Soft Fill
The process is brought to a certain level (P3.13.8.3) at slow frequency (P3.13.8.2) before the PID
controller starts to control. In addition, you can also set a timeout for the soft fill function. If the set
level is not reached within the timeout a fault is triggered. This function can be used e.g. to fill the
empty pipe line slowly in order to avoid "water hammers" that could otherwise break the pipes.
It is recommended to use the Soft Fill function always when using the Multi Pump functionality.
7.1.14.9
Group 3.13.9: Input Press.Superv.
The
Input pressure supervision
function is used to supervise that there is enough water in the inlet
of the pump, to prevent the pump from sucking air or causing suction cavitation. This function re-
quires a pressure sensor to be installed on the pump inlet, see Figure 37.
If the pump inlet pressure falls below the defined alarm limit, an alarm will be triggered and the
pump output pressure reduced by decreasing the PID controller setpoint value. If the inlet pressure
still keeps falling below the fault limit, the pump is stopped and a fault will be triggered.
Table 112. Soft fill settings
Code
Parameter
Min
Max
Unit
Default
ID
Description
P3.13.8.1
1
0
1094
0 = Disabled
1 = Enabled
P3.13.8.2
0.00
50.00
Hz
20.00
1055
The drive accelerates to this fre-
quency before starting to control.
P3.13.8.3
Varies
Varies
Varies
0.0000
1095
The drive runs at the PID start
frequency until the feedback
reaches this value. At this point
the controller starts to regulate
(depending on acting mode).
P3.13.8.4
0
30000
s
0
1096
If the desired value is not reached
within this time a fault or alarm is
created.
0 = No timeout (
NOTE!
No fault
triggered if value ‘0’ is set)
P3.13.8.5
Timeout Response
0
3
2
738
0 = No action
1 = Alarm
2 = Fault (Stop according to stop
mode)
3 = Fault (Stop by coasting)
