3.5.5 3-8* Other Ramps
3-80 Jog Ramp Time
Range:
Function:
Size
related
*
[0.1 -
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
3-84 Initial Ramp Time
Range:
Function:
0 s
*
[0 -
60 s]
Enter the initial ramp-up time from zero speed to
motor speed low limit,
or
parameter 4-12 Motor Speed Low
. Submersible deep-well pumps can be
damaged by running below minimum speed. A fast
ramp time below minimum pump speed is
recommended. This parameter may be applied as a
fast ramp rate from zero speed to motor speed low
limit. See
.
130BA962.10
Motor Speed
Motor Speed
High
Low
Normal
Ramps
Initial
Ramp
Final
Ramp
Time
Speed
Illustration 3.23 Initial and Final Ramp Time
3-85 Check Valve Ramp Time
Range:
Function:
0 s
*
[0 -
650 s]
To protect ball check valves in a stop situation, the
check valve ramp can be utilized as a slow ramp
rate from
parameter 4-11 Motor Speed Low Limit
or
parameter 4-12 Motor Speed Low Limit [Hz]
to check valve ramp end speed, set in
parameter 3-86 Check Valve Ramp End Speed [RPM]
or
parameter 3-87 Check Valve Ramp End Speed [HZ]
.
When
parameter 3-85 Check Valve Ramp Time
is
different from 0 s, the check valve ramp time is
effectuated and is used to ramp down the speed
from motor speed low limit to the check valve end
speed in
parameter 3-86 Check Valve Ramp End
Speed [RPM]
or
parameter 3-87 Check Valve Ramp
End Speed [HZ]
. See
130BA961.10
Speed
Motor Speed
Normal
Check valve
Motor Speed
High
Low
Time
Ramp
End Speed
Illustration 3.24 Check Valve Ramp
3-86 Check Valve Ramp End Speed [RPM]
Range:
Function:
Size related
*
[ 0 - par.
4-11 RPM]
Set the speed in [RPM] below motor
speed low limit where the check
valve is expected to be closed. Check
that the valve is no longer active. See
.
3-87 Check Valve Ramp End Speed [HZ]
Range:
Function:
Size related
*
[ 0 - par.
4-12 Hz]
Set the speed in [Hz] below motor
speed low limit where the check
Parameter Description
VLT
®
AQUA Drive FC 202
70
Danfoss A/S © 05/2018 All rights reserved.
MG20OB02
3
3
Содержание VLT AQUA Drive FC 202
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