Danfoss vlt FC 102 Programming Guide

3-41 Ramp 1 Ramp Up Time
Range: Function:
Size
related*
[ 1.00 - 3600
s]
Enter the ramp-up time, that is the
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 3-42 Ramp 1 Ramp Down
Time.
par . 3 − 41 =
tacc × nnom par . 1 − 25
ref  RPM
s
3-42 Ramp 1 Ramp Down Time
Range: Function:
Size
related*
[ 1.00 - 3600
s]
Enter the ramp-down time, that is
the 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
parameter 4-18 Current Limit. See
ramp-up time in
parameter 3-41 Ramp 1 Ramp Up
Time.
par . 3 − 42 =
tdec × nnom par . 1 − 25
ref  RPM
s
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
related*
[ 1.00 - 3600
s]
Enter the ramp-up time, that is the
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.
par . 3 − 51 =
tacc × nnom par . 1 − 25
ref  rpm
 s
3-52 Ramp 2 Ramp Down Time
Range: Function:
Size
related*
[ 1.00 - 3600
s]
Enter the ramp-down time, that is
the 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.
par . 3 − 52 =
tdec × nnom par . 1 − 25
ref  rpm
 s
3.5.5 3-8* Other Ramps
3-80 Jog Ramp Time
Range: Function:
Size
related*
[1 - 3600 s] Enter the jog ramp time, that is the
acceleration/deceleration time
between 0 RPM and the nominal
motor speed (n
M,N
) (set in
parameter 1-25 Motor Nominal
Speed). Ensure that the resulting
output current required for the
given jog ramp time does not
exceed the current limit in
parameter 4-18 Current Limit. The
jog ramp time starts after activating
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
 jogspeed par . 3 − 19
 s
130BA070.10
Time
P 3-80
RPM
P 4-13 RPM
high limit
P 1-25
Motor speed
Jog speed
P 3-19
P 3-80
Ramp up
(acc)
Ramp down
(dec)
t jog t jog
P 4-11 RPM
low limit
Illustration 3.22 Jog Ramp Time
Parameter Descriptions Programming Guide
M0010001 Danfoss A/S © 10/2019 All rights reserved. 79
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Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English