Function:
You can choose between a linear, a sine-shaped and
a sine
2
-shaped ramp process.
Description of choice:
Select the required ramp type depending on require-
mentsfor the acceleration/deceleration process.
207
Ramp-up time 1
(Ramp-up time 1)
Value:
0.02 - 3600.00 sec
3.00 sec (VLT 2803-2875)
10.00 sec (VLT 2880-2882)
Function:
The ramp-up time is the acceleration time from 0 Hz to
the rated motor frequency f
M,N
(parameter 104
Motor
frequency, f
M,N
). It is assumed that the output current
will not reach the current limit (set in parameter 221
Current limit I
LIM
).
Description of choice:
Set the required ramp-up time.
208
Ramp-down time 1
(ramp down time 1)
Value:
0.02 - 3600.00 sec
3.00 sec (VLT 2803-2875)
10.00 sec (VLT 2880-2882)
Function:
The ramp-down time is the deceleration time from the
rated motor frequency f
M,N
(parameter 104
Motor fre-
quency, f
M,N
) to 0 Hz, provided no overvoltage arises
in the inverter because of generating operation of the
motor.
Description of choice:
Set the required ramp-down time.
209
2 Ramp-up time
(2 Ramp-up time)
Value:
0.02 - 3600.00 sec.
3.00 sec (VLT 2803-2875)
10.00 sec (VLT 2880-2882)
Function:
See description of parameter 207
Ramp-up time 1
.
Description of choice:
Set the required ramp-up time. Shift from ramp 1 to
ramp 2 by activating
Ramp 2
via a digital input.
210
2 Ramp-down time
(ramp down time 2)
Value:
0.02 - 3600.00 sec.
3.00 sec (VLT 2803-2875)
10.00 sec (VLT 2880-2882)
Function:
See description of parameter 208
Ramp-down time 1
.
Description of choice:
Set the required ramp-down time. Shift from ramp 1 to
ramp 2 by activating
Ramp 2
via a digital input.
211
Jog ramp time
(Jog ramp time)
Value:
0.02 - 3600.00 sec.
3.00 sec (VLT 2803-2875)
VLT
®
2800 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
54
MG.27.A2.22 - VLT
®
is a registered Danfoss trademark