Vacon 100X series, Applications Manual

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Parameters vacon • 106
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6
6.1.14.9 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 requires a pressure sensor to be installed on the pump inlet, see Figure 25.
If the pump inlet pressure falls below the defined alarm limit, an alarm will be trigged 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 trigged.
Figure 25. Location of pressure sensor
Figure 26. Input pressure supervision.
PT
Mains
Inlet
Outlet
( )
Input Pressure
Supervision Fault Level
Input Pressure Alarm
Digital output signal
Supervision Alarm Level
Input Pressure Monitor
PID Setpoint
PID Setpoint
Supervision
Fault Delay
Supervision
Fault Delay
Motor Running
Yes
No
PID Setpoint
Reduction
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