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3-41 Ramp 1 Ramp Up Time
Range:
Function:
10.00 s*
[1.00 - 3600.00 s]
Enter the ramp-up time, i.e. the acceleration time from 0 RPM to par.1-25
.
Choose a ramp-up time such that the output current does not exceed the current limit in
par. 4-18
Current Limit
during ramping. See ramp-down time in par.3-42
par
.3
−
41 =
tacc
×
nnorm
par
.1
−
25
ref
rpm
s
3-42 Ramp 1 Ramp Down Time
Range:
Function:
20.00 s*
[1.00 - 3600.00 s]
Enter the ramp-down time, i.e. the deceleration time from 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 generated current does not exceed the current limit set
in par. 4-18
Current Limit
. See ramp-up time in par.3-41
par
.3
−
42 =
tdec
×
nnorm
par
.1
−
25
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:
10.00 s*
[1.00 - 3600.00 s]
Enter the ramp-up time, i.e. the acceleration time from 0 RPM to par.1-25
.
Choose a ramp-up time such that the output current does not exceed the current limit in
par. 4-18
Current Limit
during ramping. See ramp-down time in par.3-52
par
. 3
−
51 =
tacc
×
nnorm
par
. 1
−
25
ref
rpm
s
3-52 Ramp 2 Ramp Down Time
Range:
Function:
20.00 s*
[1.00 - 3600.00 s]
Enter the ramp-down time, i.e. the deceleration time from 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 generated current does not exceed the current limit set
in par. 4-18
Current Limit
. See ramp-up time in par.3-51
par
.3
−
52 =
tdec
×
nnorm
par
. 1
−
25
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:
20.00 s*
[1.00 - 3600.00 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
). Ensure that the resultant output current re-
quired for the given jog ramp time does not exceed the current limit in par. 4-18
Current Limit
. The
jog ramp time starts upon activation of a jog signal via the control panel, a selected digital input,
or the serial communication port.
par
. 3
−
80 =
tjog
×
nnorm
par
. 1
−
25
jog
speed
par
. 3
−
19
s
2 Parameter Description
VLT
®
AQUA Drive Programming Guide
54
MG.20.O4.02 - VLT
®
is a registered Danfoss trademark
2