Pump Switchover - Siemens SINAMICS G120XA Operating Instructions Manual

Advanced commissioning
6.3 Pump control
6.3.1.3

Pump switchover

Function description
With pump switchover enabled (with p29539), the converter monitors the operation status of all
running pumps.
● If the continuous operating hours (p29547) of the pump in converter operation exceed the
threshold (p29531), the converter switches off the pump and then switches in an idle pump
to keep constant output power.
● If the continuous operating hours (p29547) of a pump in line operation exceed the threshold
(p29531), the converter first switches off the pump, switches out the converter-controlled
pump to line operation, and then switches in an idle pump to run in converter operation to
keep constant output power.
You can use parameter p29522 to define the selection mode for the next pump. The internal
counters (p29530[0...3] and p29547[0...3]) are used to calculate the operating hours of the
pumps.
● p29522 = 0: Selecting the next pump according to the fixed sequence.
The converter first switches out the pump with the most continuous operating hours
(p29547[0...3]) and then switches in a pump following the sequence of M1 → M2 → M3 → M4.
● p29522 = 1: Selecting the next pump according to the operating hours.
The converter switches out the pump with the most continuous operating hours
(p29547[0...3]) and then switches in the pump with the least absolute operating hours
(p29530[0...3]).
When a pump is switched off, the continous operating hours (p29547) of this pump reset to zero
automatically.
This function balances the operation time of each pump, extends the lifetime expectancy of the
system and reduces downtime.
210
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
SINAMICS G120XA converter