6.3
Pump control
6.3.1
Multi-pump control
Overview
Multi-pump control is suitable for applications that require simultaneous operation of up to four
pumps, for example, equalizing significantly fluctuating water pressures or flow rates. After the
function is enabled, you can configure the following four sub-functions based on your particular
requirements:
● Pump switch-in/switch-out (Page 202)
● Stop mode (Page 207)
● Pump switchover (Page 210)
● Service mode (Page 212)
Multi-pump control provides a flexible and cost-effective solution for the following:
● Control up to four pumps without additional I/O module
● Smoothly start and stop every pump to ensure the best performance of the water supply
system
● Simplify the control system
Note
The multi-pump control function is not supported on G120XA converter variants of power rating
30 kW or above.
Precondition
Before using the multi-pump control function, make sure that you have connected pumps of the
same power rating.
Function description
The converter uses four relays (KP1 to KP4), which are connected to digital outputs DO 0 to DO
3, to switch pumps in and out according to the PID error (r2273). In addition, two groups of
contactors, KDs and KMs, are designed to switch the pumps between converter operation and
line operation. Soft pump switching can be realized as all motors start/stop with ramp speeds,
so as to minimize the shock to the pipes.
Parameter p29520 is used to enable the multi-pump control.
Advanced commissioning
6.3 Pump control
SINAMICS G120XA converter
200
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
Содержание SINAMICS G120XA
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