VLT
®
FCM Series
Programming
While the frequency converter has stopped the
motor in sleep mode, a theoretical output frequency
is calculated on the basis of the reference signal.
When the theoretical output frequency rises above
the frequency in parameter 407
Wake up frequency
,
the frequency converter will restart the motor and the
output frequency will ramp up to the reference.
In systems with constant pressure regulation, it
is advantageous to provide extra pressure to the
system before the frequency converter stops the
motor. This extends the time during which the
frequency converter has stopped the motor and
helps to avoid frequent starting and stopping of the
motor, e.g. in the case of system leaks.
If 25% more pressure is required before the
frequency converter stops the motor, parameter
406
Boost setpoint
is set to 125%.
Parameter 406
Boost setpoint
is only active
in
Closed loop
.
NB!:
In highly dynamic pumping processes, it
is recommended to switch off the
Flying
Start
function (parameter 445).
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.03.H3.02 - VLT is a registered Danfoss trademark
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