3
MI.50.J1.02 - VLT is a registered Danfoss trademark
VLT
®
Series 5000 Wobble function
701
Center frequency (CENTER FREQ)
Value:
0.0 - 120.0 Hz
✭
25.0Hz
Function:
The center frequency of the wobble sequence is
specified in this parameter.
Description of choice:
The center frequency is specified in Hertz. The output
frequency can not exceed the setting of parameter
200.
704
Jump time (JUMP TIME)
Value:
0 - 50 ms
✭
0 ms
Function:
This parameter determines the slope of the jump
ramp at the maximum and minimum wobble
frequency.
This parameter can only be changed in stop-mode.
Description of choice:
The time is specified in milliseconds.
702
Delta frequency (DELTA FREQ)
Value:
0.0 - 20.0 Hz
✭
5.0Hz
Function:
The delta frequency is determining the magnitude of
the wobble frequency. The delta frequency is
superimposed on the center frequency. Parameter
702 is selecting both the positive and negative delta
frequency. The setting of parameter 702 must thus
not be higher than the setting of parameter 701.
The initial ramp up time from standstill until the
wobble sequence is running is determined by
parameter 207.
Description of choice:
The frequency is specified in Hertz.
703
Jump frequency (JUMP FREQ)
Value:
0.0 - 25.0 Hz
✭
0.0Hz
Function:
The jump frequency is used to compensate for the
inertia in the traverse system.
If a jump in the output frequency is required in the top
and in the bottom of the wobble sequence, the
frequency jump is set in this parameter.
If the traverse system has a very high inertia a high
jump frequency may create a torque limit warning or
trip (warning/alarm 12) or an over voltage warning or
trip (warning/alarm 7).
This parameter can only be changed in stop-mode.
Description of choice:
The frequency is specified in Hertz.
705
Wobble time (WOBBLE TIME)
Value:
0.0 - 1000.0 s
✭
10.0 s
Function:
This parameter determines the wobble sequence
period.
This parameter can only be changed in stop-mode.
Wobble time = t
up
+ t
down
Description of choice:
The time is entered in seconds.
706
Wobble ratio (WOBB RATIO)
Value:
0.1 - 10
✭
1
Function:
The ratio between the up time versus the down time
of the wobble sequence is specified in this parameter.
Wobble ratio = t
up
/t
down,
This parameter can only be changed in stop-mode.
Description of choice:
If the ratio
0.1
is selected:
t
down
is 10 times greater than t
up
.
If the ratio
10
is selected:
t
up
is 10 times greater than t
down
.
