4.4.6 3-7* Ramp 4
This parameter group configures ramp 4 parameters.
3-70 Ramp 4 Type
Option:
Function:
Select the ramp type, depending on
requirements for acceleration/deceleration. A
linear ramp gives constant acceleration during
ramping. An S-ramp gives non-linear
acceleration.
[0]
*
Linear
[2]
Sine 2
Ramp
S-ramp based on the values set in
parameter 3-71 Ramp 4 Ramp up Time
and
parameter 3-72 Ramp 4 Ramp Down Time
.
3-71 Ramp 4 Ramp up Time
Range:
Function:
Size
related
*
[0.05 -
3600 s]
Enter the ramp-up time, which is the
acceleration time from 0 RPM to the rated
motor speed n
s
. Select a ramp-up time such
that the output current does not exceed the
current limit in
parameter 4-18 Current Limit
during ramping. The value 0.00 corresponds
to 0.01 s in speed mode. See ramp-down
time in
parameter 3-72 Ramp 4 Ramp Down
Time
.
Par . 3 − 71 =
t
acc
s x n
s
RPM
ref RPM
3-72 Ramp 4 Ramp Down Time
Range:
Function:
Size
related
*
[0.05 -
3600 s]
Enter the ramp-down time, which is the
deceleration time from the rated motor
speed n
s
to 0 RPM. Select a ramp-down time
such that no overvoltage arises in the
inverter due to regenerative operation of the
motor, and such that the generated current
does not exceed the current limit set in
parameter 4-18 Current Limit
. The value 0.00
corresponds to 0.01 s in speed mode. See
ramp-up time in
parameter 3-71 Ramp 4
Ramp up Time
.
Par . 3 − 72 =
t
dec
s x n
s
RPM
ref RPM
4.4.7 3-8* Other Ramps
3-80 Jog Ramp Time
Range:
Function:
Size
related
*
[0.05
- 3600
s]
Enter the jog ramp time, which is the
acceleration/deceleration time between 0 RPM
and the rated motor frequency n
s
. Ensure that
the resulting output current required for the
given jog ramp time does not exceed the
current limit in
.
3-80 Jog Ramp Time
Range:
Function:
The jog ramp time starts when activating a
jog signal via the LCP, a selected digital
output, or the serial communication port.
When jog state is disabled, the normal
ramping times are valid.
130BD375.10
Time
P 3-80
Hz
P 4-14 Hz
high limit
P 1-25
Motor speed
Jog speed
P 3-19
P 3-80
Ramp up
(acc)
Ramp down
(dec)
t jog
t jog
P 4-12 Hz
low limit
Illustration 4.8 Jog Ramp Time
Par . 3 − 80 =
t
jog
s x n
s
RPM
Δ jog speed par . 3 − 19 RPM
3-81 Quick Stop Ramp Time
Range:
Function:
Size
related
*
[0.05 -
3600 s]
Enter the quick–stop ramp-down time,
which is the deceleration time from the
synchronous motor speed to 0 RPM. Ensure
that no resulting overvoltage occurs in the
inverter due to regenerative operation of
the motor required to achieve the given
ramp-down time. Ensure also that the
generated current required to achieve the
given ramp-down time does not exceed
the current limit (set in
parameter 4-18 Current Limit
). Quick-stop is
activated with a signal on a selected digital
input, or via the serial communication port.
Parameter Descriptions
VLT
®
AutomationDrive FC 360
44
Danfoss A/S © 7/2015 All rights reserved.
MG06C602
4
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