Siemens SINAMICS V20 Inverter, Operating Manual

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SINAMICS V20 multi-pump control
Operating Manual, 05/2018, A5E43416874-002
21
Pump switchover
4
With pump switchover enabled, the inverter monitors the operation status of all running
pumps.
● If the continuous operating hours of the pump in inverter operation exceed the threshold
(P4024), the inverter switches off the pump and then switches in an idle pump to keep
constant output power.
● If the continuous operating hours of a pump in line system operation exceed the threshold
(P4024), the inverter first switches off the pump, switches out the directly controlled pump
from inverter operation to line system operation, and switches in an idle pump to keep
constant output power.
You can use parameter P4012 to define the selection mode for the next pump. The internal
counters (r4026 to r4029 and r4031 to r4034) are used to calculate the operating hours of
the pumps.
● P4012 = 0: Selecting the next pump according to the fixed sequence. The inverter first
switches out the pump with most continuous operating hours (r4031 to r4034) and then
switches in the pump following the sequence M1, M2, M3, to M4.
● P4012 = 1: Selecting the next pump according to the operating hours. The inverter first
switches out the pump with the most continuous operating hours (r4031 to r4034) and
then switches in the pump with the least absolute operating hours (r4026 to r4029).