ST9000 | Pump Control

To use the frequency inverter as a pump control, for example at a pressure sensor for the “actual pressure”, these parameters are required:

Parameter Value Description

F0.03

2

Frequency control via analog input, potentiometer to AI1 (GND, AI1, +10 V)

F0.04

8

Switch auxiliary controlling of frequency to PID

F0.07

34

Signal for main frequency/auxiliary frequency are added

F0.11

1

Allow control through terminals / clamps

E2.02

6

Insert the input for feedback signal on AI2 (transducter pressure on AI2)

E2.00

1

Setpoint input via potentiometer to AI1

FC.02

10

Pressure deviation in [%] from setpoint, at which the pump will start

F7.46

20.0

Hz Start fequency, at which the inverter will restart

F7.47

5.0

Time delay at the start of the pump when pressure deviates

F7.48

15.0

Hz Stop frequency at which the inverter switches to standby
F7.49 5.0 Time delay to turn on the standby
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