130BA069.10
Time
RPM
P 4-13 RPM
high limit
Reference
P 1-25
Motor speed
low limit
P 4-11 RPM
P 3-81
Qramp
Qstop
Illustration 3.28
Par
. 3 − 81 =
t
Qstop
s
x
n
s
RPM
Δ
jog
ref
(
par
. 3 − 19
)
RPM
3-82 Quick Stop Ramp Type
Option: Function:
Select the ramp type, depending on
requirements for acceleration and
deceleration. A linear ramp will give
constant acceleration during ramping. An
S-ramp will give non-linear acceleration,
compensating for jerk in the application.
[0] * Linear
[1] S-ramp Const
Jerk
[2] S-ramp Const
Time
3-83 Quick Stop S-ramp Ratio at Decel. Start
Range: Function:
50 %* [ 1 - 99.
%]
Enter the proportion of the total ramp-down
time (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.
3-84 Quick Stop S-ramp Ratio at Decel. End
Range: Function:
50 %* [ 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.
3.5.8 3-9* Digital Pot.Meter
The digital potentiometer function allows the user to
increase or decrease 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 (s)
Inc
130BA158.11
P 3-95
Illustration 3.29
Speed
Time (s)
Dec
Inc
130BA159.11
P 3-95
Illustration 3.30
3-90 Step Size
Range: Function:
0.10 %* [0.01 -
200.00 %]
Enter the increment size required for
INCREASE/DECREASE, as a percentage of
the synchronous motor speed, n
s
. If
INCREASE/DECREASE is activated the
resulting reference will be increased/
decreased by the amount set in this
parameter.
3-91 Ramp Time
Range: Function:
1.00
s*
[0.00 -
3600.00 s]
Enter the ramp time, i.e. the time for
adjustment of the reference from 0% to
100% of the specified digital potentiometer
function (Increase, Decrease or Clear).
If Increase/ Decrease is activated for longer
than the ramp delay period specified in
3-95 Ramp Delay the actual reference will be
ramped up / down according to this ramp
time. The ramp time is defined as the time
used to adjust the reference by the step size
specified in 3-90 Step Size.
Parameter Descriptions
VLT
®
AutomationDrive Programmming Guide
64 MG33ME02 - VLT
®
is a registered Danfoss trademark
3
3
To Next Page
Loading...
