Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 78

How to Programme
3-41 Ramp 1 Ramp Up Time
Range:
Size [ 1.00 -
related 3600 s]
*
t
×
acc
par .3 − 41 =
3-42 Ramp 1 Ramp Down Time
Range:
6 6
Size [ 1.00 -
related 3600 s]
*
t
×
dec
par .3 − 42 =
4-11 Motor Speed Low Limit [RPM]
Range:
Size [ 0 - par.
related 4-13
*
RPM]
4-12 Motor Speed Low Limit [Hz]
Range:
Size [ 0 -
related par. 4-14
*
Hz]
76
Function:
Enter the ramp-up time, that is, the
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.
n par .1 − 25
nom
s
ref RPM
Function:
Enter the ramp-down time, that is, the
deceleration time from
parameter 1-25 Motor Nominal Speed to 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
4-18 Current Limit. See ramp-up time in
parameter 3-41 Ramp 1 Ramp Up Time.
n par .1 − 25
nom
s
ref RPM
Function:
Enter the minimum limit for motor speed
in RPM. The motor speed low limit can be
set to correspond to the manufacturer's
recommended minimum motor speed.
The motor speed low limit must not
exceed the setting in
parameter 4-13 Motor Speed High Limit
[RPM].
Function:
Enter the minimum limit for motor speed
in Hz. The motor speed low limit can be
set to correspond to the minimum output
frequency of the motor shaft. The speed
low limit must not exceed the setting in
parameter 4-14 Motor Speed High Limit [Hz].
Danfoss A/S © 08/2014 All rights reserved.
Operating Instructions
4-13 Motor Speed High Limit [RPM]
Range:
Size
related
*
4-14 Motor Speed High Limit [Hz]
Range:
Size
related
*
Function:
NOTICE
[ par.
4-11 -
Any changes in parameter 4-13 Motor
60000
Speed High Limit [RPM] reset the value
RPM]
in parameter 4-53 Warning Speed High
to the value set in
parameter 4-13 Motor Speed High Limit
[RPM].
NOTICE
Max. output frequency cannot exceed
10% of the inverter switching
frequency (parameter 14-01 Switching
Frequency).
Enter the maximum limit for motor speed in
RPM. The motor speed high limit can be set
to correspond to the manufacturer's
maximum rated motor. The motor speed
high limit must exceed the setting in
parameter 4-11 Motor Speed Low Limit [RPM].
The parameter name appears as either
parameter 4-11 Motor Speed Low Limit [RPM]
or parameter 4-12 Motor Speed Low Limit [Hz],
depending on:
•
The settings of other parameters in
the Main Menu.
•
Default settings based on
geographical location.
Function:
[ par. Enter the maximum limit for motor speed
4-12 - in Hz. Parameter 4-14 Motor Speed High
par. Limit [Hz] can match the manufacturer's
4-19 Hz] recommended maximum motor speed. The
motor speed high limit must exceed the
value in parameter 4-12 Motor Speed Low
Limit [Hz]. The output frequency must not
exceed 10% of the switching frequency
(parameter 14-01 Switching Frequency).
MG11F502