Commissioning
5.6 Function commissioning
SINAMICS V20 Inverter
98 Operating Instructions, 07/2012, A5E03728167
Parameter Function Setting
P2947 Wobble signal decrement step This parameter sets the value for decrement step at the end
of the positive signal period.
Range: 0.000 ... 1.000 (factory default: 0.000)
P2948 Wobble signal increment step This parameter sets the value for the increment step at the
end of the negative signal period.
Range: 0.000 ... 1.000 (factory default: 0.000)
P2949 Wobble signal pulse width [%] This parameter sets the relative widths of the rising and falling
pulses.
Range: 0 ... 100 (factory default: 50)
5.6.3.13 Running the inverter in motor staging mode
Functionality
Motor staging allows the control of up to 2 additional staged pumps or fans, based on a PID
control system. The complete system consists of one pump controlled by the inverter and up
to 2 further pumps / fans controlled from contactors or motor starters. The contactors or
motor starter are controlled by digital outputs from the inverter.
The diagram below shows a typical pumping system.
0DLQV
,QYHUWHU
0RWRUVWDUWHUV
3UHVVXUHVHQVRU
7RLQYHUWHU3,'LQSXW
09 0 0
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