Danfoss VLT AutomationDrive FC 302 Programming Manual page 76

Parameter Descriptions
RPM
P 4-13 RPM
high limit
P 1-25
3 3
Motor speed
P 3-19
Jog speed
P 4-11 RPM
low limit
Illustration 3.27 Jog Ramp Time
Par . 3 − 80 =
jog speed par . 3 − 19 RPM
Δ
3-81 Quick Stop Ramp Time
Range:
Size [0.01 -
related 3600 s]
*
Illustration 3.28 Quick Stop Ramp Time
74
t jog t jog
P 3-80 P 3-80
Ramp up Ramp down
(acc) (dec)
tjog s x ns RPM
Function:
Enter the quick–stop ramp-down time, i.e.
the deceleration time from the
synchronous motor speed to 0 RPM. Ensure
that no resultant over-voltage arises 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 by means of a signal on a
selected digital input, or via the serial
communication port.
RPM
P 4-13 RPM
high limit
Reference
P 1-25
Motor speed
P 4-11 RPM
low limit
P 3-81
Qramp
Qstop
Danfoss A/S © Rev. 10/2014 All rights reserved.
®
VLT AutomationDrive FC 301/302
3-82 Quick Stop Ramp Type
Option:
[0] Linear
*
Time
[1] S-ramp Const
Jerk
[2] S-ramp Const
Time
3-83 Quick Stop S-ramp Ratio at Decel. Start
Range:
50 %
*
%]
3-84 Quick Stop S-ramp Ratio at Decel. End
Range:
50 %
*
%]
3.5.8 3-9* Digital Pot.Meter
The digital potentiometer enables increase or decrease of
the actual reference by adjusting the set-up of the digital
inputs using the functions Increase, Decrease or Clear. To
activate the function, at least one digital input must be set
up to Increase or Decrease.
Speed
Time
Inc
Illustration 3.29 Increase Actual Reference
Function:
Select the ramp type, depending on
requirements for acceleration and
deceleration. A linear ramp gives constant
acceleration during ramping. An S-ramp
gives non-linear acceleration, compen-
sating for jerk in the application.
Function:
[ 1 - 99 Enter the proportion of the total ramp-down
time (parameter 3-42 Ramp 1 Ramp Down Time)
where the deceleration torque increases. The
larger the percentage value, the greater the
jerk compensation achieved, and thus the
lower the torque jerks in the application.
Function:
[ 1 - 99 Enter the proportion of the total ramp-down
time (3-42 Ramp 1 Ramp Down Time) where
the deceleration torque decreases. The larger
the percentage value, the greater the jerk
compensation achieved, and thus the lower
the torque jerks in the application.
P 3-95
Time (s)
MG33MJ02