6.4
Pump control
6.4.1
Multi-pump control
Overview
Multi-pump control is suitable for applications that require simultaneous operation of up to six
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 303)
● Stop mode (Page 308)
● Pump switchover (Page 311)
● Service mode (Page 313)
Multi-pump control provides a flexible and cost-effective solution for the following:
● 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 G120X converter variants of power rating
30 kW or above.
Note
When using the multi-pump function, I/O Extension Module is required to support more than
two pumps. For information about how to wiring the I/O Extension Module, see Section
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 six relays (KP1 to KP6), which are connected to digital outputs DO 0 to DO
5, to switch pumps in and out according to the technology controller deviation (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
6.4 Pump control
SINAMICS G120X converter
300
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Содержание SINAMICS G120X
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