Danfoss VLT AQUA Drive FC 202 Programming Manual page 71

Parameter Description
3-19 Jog Speed [RPM]
Range: Function:
Size [ 0 - Enter a value for the jog speed n
related par. 4-13 is a fixed output speed. The frequency
*
RPM] converter runs at this speed when the jog
function is activated. The maximum limit is
defined in parameter 4-13 Motor Speed High
Limit [RPM].
See also parameter 3-11 Jog Speed [Hz] and
parameter 3-80 Jog Ramp Time.
3.5.3 3-4* Ramp 1
Configure the ramp times for each of the 2 ramps
(parameter group 3-4* Ramp 1 and parameter group 3-5*
Ramp 2).
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 3.21 Ramp 1
3-41 Ramp 1 Ramp Up Time
Range: Function:
Size [ 0.10 Enter the ramp-up time, that is the
related - 3600 acceleration time from 0 RPM–
*
s] parameter 1-25 Motor Nominal Speed. Select a
ramp-up time such that the output current
does not exceed the current limit in
parameter 4-18 Current Limit during ramping.
See ramp-down time in parameter 3-42 Ramp
1 Ramp Down Time.
tacc × nnom par . 1 − 25
par . 3 − 41 =
3-42 Ramp 1 Ramp Down Time
Range: Function:
Size [ 0.10 - Enter the ramp-down time, that is the
related 3600 s] deceleration time from
*
parameter 1-25 Motor Nominal Speed–0 RPM.
Select a ramp-down time preventing
overvoltage from arising in the inverter due
to regenerative operation of the motor. The
ramp-down time should also be long
enough to prevent that the generated
current exceeds the current limit set in
MG20OB02
Programming Guide
, which
JOG
Time
P 3-*2
Ramp (X)
Down
Time (Dec)
t
dec
s
ref RPM
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3-42 Ramp 1 Ramp Down Time
Range: Function:
parameter 4-18 Current Limit. See ramp-up
time in parameter 3-41 Ramp 1 Ramp Up
Time.
par . 3 − 42 =
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, that is the
related 3600 s] acceleration time from 0 RPM–
*
parameter 1-25 Motor Nominal Speed. Select
a ramp-up time such that the output
current does not exceed the current limit in
parameter 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 =
3-52 Ramp 2 Ramp Down Time
Range: Function:
Size [ 0.10 - Enter the ramp-down time, that is the
related 3600 s] deceleration time from
*
parameter 1-25 Motor Nominal Speed–0 RPM.
Select a ramp-down time such that no
overvoltage occurs in the inverter due to
regenerative operation of the motor, and
such that the generated current does not
exceed the current limit set in
parameter 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 =
tdec × nnom par . 1 − 25
s
ref RPM
s
ref rpm
s
ref rpm
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