Danfoss VLT AQUA Drive FC 202 Programming Manual page 61

Parameter Description
RPM
P 4-13
High-limit
Reference
P 1-25
Motor
speed
P 4-11
Low limit
P 3-*1
Ramp (X)Up
Time (Acc)
t
acc
Illustration 3.17 Ramp 1
3-41 Ramp 1 Ramp Up Time
Range: Function:
Size [ 0.10 - Enter the ramp-up time, i.e. the
related 3600 s] acceleration time from 0 RPM to
*
parameter 1-25 Motor Nominal Speed.
Select a ramp-up time such that the
output current does not exceed the
current limit in 4-18 Current Limit during
ramping. See ramp-down time in
parameter 3-42 Ramp 1 Ramp Down Time.
t × n par .1 − 25
acc nom
par .3 − 41 = s
ref rpm
3-42 Ramp 1 Ramp Down Time
Range: Function:
Size [ 0.10 - Enter the ramp-down time, i.e. the
related 3600 s] deceleration time from
*
parameter 1-25 Motor Nominal Speed to 0
RPM. Select a ramp-down time such that no
overvoltage 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 4-18 Current
Limit. See ramp-up time in
parameter 3-41 Ramp 1 Ramp Up Time.
t × n par .1 − 25
dec nom
par .3 − 42 = s
ref rpm
3.5.4 3-5* Ramp 2
To select ramp parameters, see parameter group 3-4*
Ramp 1.
3-51 Ramp 2 Ramp Up Time
Range: Function:
Size [ 0.10 - Enter the ramp-up time, i.e. the
related 3600 s] acceleration time from 0 RPM to
*
parameter 1-25 Motor Nominal Speed. Select
a ramp-up time such that the output
MG20O702
Programming Guide
3-51 Ramp 2 Ramp Up Time
Range:
3-52 Ramp 2 Ramp Down Time
Time
P 3-*2
Range:
Ramp (X)
Down
Size
Time (Dec)
related
*
t
dec
3.5.5 3-8* Other Ramps
3-80 Jog Ramp Time
Range:
Size
related
*
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
Function:
current does not exceed the current limit
in 4-18 Current Limit during ramping. See
ramp-down time in parameter 3-52 Ramp 2
Ramp Down Time.
tacc × nnom par . 1 − 25
par . 3 − 51 =
ref rpm
Function:
[ 0.10 - Enter the ramp-down time, i.e. the
3600 s] deceleration time from
parameter 1-25 Motor Nominal Speed to 0
RPM. Choose a ramp-down time such that
no overvoltage 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 4-18 Current
Limit. See ramp-up time in
parameter 3-51 Ramp 2 Ramp Up Time.
tdec × nnom par . 1 − 25
par . 3 − 52 =
ref rpm
Function:
[0.1 - Enter the jog ramp time, i.e. the acceleration/
3600 s] deceleration time between 0 RPM and the
rated motor speed (n
M,N
parameter 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 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 =
t jog × nnom par . 1 − 25
s
jog speed par . 3 − 19
3
s
s
) (set in
59
3