3-42 Ramp 1 Ramp Down Time
Range:
Function:
3 s
*
[1 - 3600 s]
Enter the ramp-down time, i.e. the deceleration time from the
rated motor speed n
M,N
(par. 1-25) to 0 RPM. Choose a ramp-
down time such that no over-voltage arises in the inverter due
to regenerative operation of the motor, and such that the gen-
erated current does not exceed the current limit set in par. 4-18.
See ramp-up time in par. 3-41.
par
.3
−
42 =
t
dec
×
n
norm
par
.1
−
25
Δ
ref rpm
s
2.5.4. 3-5* Ramp 2
Choosing ramp parameters, see 3-4*.
3-51 Ramp 2 Ramp up Time
Range:
Function:
3 s
*
[1 - 3600 s]
Enter the ramp-up time, i.e. the acceleration time from 0 RPM
to the rated motor speed (n
M,N
) (par. 1-25). Choose a ramp-up
time such that the output current does not exceed the current
limit in par. 4-18 during ramping. See ramp-down time in par.
3-52.
par. 3
−
51 = tacc × nnorm par. 1
−
25
Δ
ref rpm
s
3-52 Ramp 2 Ramp down Time
Range:
Function:
3 s
*
[1 - 3600 s.]
Enter the ramp-down time, i.e. the deceleration time from the
rated motor speed (n
M,N
) (par. 1-25) to 0 RPM. Choose a ramp-
down time such that no over-voltage arises in the inverter due
to regenerative operation of the motor, and such that the gen-
erated current does not exceed the current limit set in par. 4-18.
See ramp-up time in par. 3-51.
par.3
−
52 = tdec × nnorm par. 1
−
25
Δ
ref rpm
s
2.5.5. 3-8* Other Ramps
Configure parameters for special ramps e.g. Jog or Quick Stop.
3-80 Jog Ramp Time
Range:
Function:
20 s
*
[1 - 3600 s]
Enter the jog ramp time, i.e. the acceleration/deceleration time
between 0 RPM and the rated motor speed (n
M,N
) (set in par.
1-25
Motor Nominal Speed
). Ensure that the resultant output
current required for the given jog ramp time does not exceed
the current limit in par. 4-18. The jog ramp time starts upon
2. Parameter Description
VLT
®
AQUA Drive Programming Guide
66
MG.20.O2.02 - VLT
®
is a registered Danfoss trademark
2
