6.4.1.1 Pump switch-in/switch-out
Pump switch-in
If the pump controlled by the converter runs at the maximum speed (p1082) and the technology
controller deviation (r2273) exceeds the switch-in threshold (p29523) but is lower than the
overcontrol threshold (p29526) for a specified time (p29524), the converter first switches the
pump from converter operation to line operation, and then switches on an idle pump. This pump
is softly started with a ramp-up speed and runs in converter operation mode.
Note
If the technology controller deviation rises above the overcontrol threshold (p29526), the
converter skips the delay time (p29524) and performs the switch-in operation immediately.
Parameter p29522 is used to define the selection mode for switching in motors.
● p29522 = 0: Selecting the next pump according to the fixed sequence. The converter
switches in the pump by following the sequence M1 → M2 → M3 → M4 → M5 → M6.
● p29522 = 1: Selecting the next pump according to the operating hours. The converter
switches in the pump with the least absolute operating hours (p29530[0...5]).
Advanced commissioning
6.4 Pump control
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC 303
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