Application macros 99
Pump alternation using contactors
In this example, two pumps both have a contactor configuration that enables them to
be connected either to the drive output or the supply. At any given time, one pump is
connected to the drive, the other is connected to the supply.
Below is a listing of typical parameter values that would be used in this configuration.
Parameter
Trad. pump control
macro default
No. Name
14.42 RO1 src Trad pump1
14.45 RO2 src Trad pump2
16.20 Macro selected Trad ctrl
26.02 Const speed sel1 C.FALSE
75.01 Operation mode Trad ctrl
75.02 Nbr of pumps 2
75.25 Drive start dly 1 s
78.01 Autochg style All stop
78.02 Autochg trad All
78.03 Interlock mode On
78.06 Interlock pump 1 DI2
78.07 Interlock pump 2 DI4
78.07 Interlock pump 3 Not used
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