Danfoss VLT Automation Drive FC 360 Programming Manual page 46

Parameter Descriptions
4.4.6 3-7* Ramp 4
This parameter group configures ramp 4 parameters.
3-70 Ramp 4 Type
Option:
4 4
[0] Linear
*
[2] Sine 2
Ramp
3-71 Ramp 4 Ramp up Time
Range:
Size [0.05 -
related 3600 s]
*
3-72 Ramp 4 Ramp Down Time
Range:
Size [0.05 -
related 3600 s]
*
4.4.7 3-8* Other Ramps
3-80 Jog Ramp Time
Range:
Size [0.05
related - 3600
*
s]
44
VLT
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.
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.
Function:
Enter the ramp-up time, which is the
acceleration time from 0 RPM to the rated
motor speed n . Select a ramp-up time such
s
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.
t s x n RPM
acc s
Par . 3 − 71 =
ref RPM
Function:
Enter the ramp-down time, which is the
deceleration time from the rated motor
speed n to 0 RPM. Select a ramp-down time
s
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.
t s x n RPM
dec s
Par . 3 − 72 =
ref RPM
Function:
Enter the jog ramp time, which is the
acceleration/deceleration time between 0 RPM
and the rated motor frequency n
the resulting output current required for the
given jog ramp time does not exceed the
current limit in parameter 4-18 Current Limit.
Danfoss A/S © 7/2015 All rights reserved.
®
AutomationDrive FC 360
3-80 Jog Ramp Time
Range:
Hz
P 4-14 Hz
high limit
P 1-25
Motor speed
P 3-19
Jog speed
P 4-12 Hz
low limit
Illustration 4.8 Jog Ramp Time
Par . 3 − 80 =
Δ jog speed par . 3 − 19 RPM
3-81 Quick Stop Ramp Time
Range:
Size
related
*
. Ensure that
s
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.
t jog
P 3-80 P 3-80
Ramp up Ramp down
(acc)
(dec)
t s x n RPM
jog s
Function:
[0.05 - Enter the quick–stop ramp-down time,
3600 s] 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.
t jog Time
MG06C602