Danfoss VLT AQUA Drive FC 200 Programming Manual page 57

Parameter Description
3.5.4 3-5* Ramp 2
Choosing ramp parameters, see parameter group 3-4*.
3-51 Ramp 2 Ramp Up Time
Range:
3 3
Size [ 0.10 -
related 3600.00
*
s]
3-52 Ramp 2 Ramp Down Time
Range:
Size [ 0.10 -
related 3600.00
*
s]
3.5.5 3-8* Other Ramps
3-80 Jog Ramp Time
Range:
Size [1.00 -
related 3600.00
*
s]
56
®
VLT
Function:
Enter the ramp-up time, i.e. the acceleration
time from 0 RPM to 1-25 Motor Nominal
Speed. Choose 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 3-52 Ramp 2 Ramp
Down Time.
tacc × nnom par . 1 − 25
par . 3 − 51 =
ref rpm
Function:
Enter the ramp-down time, i.e. the
deceleration time from 1-25 Motor Nominal
Speed to 0 RPM. Choose a ramp-down time
such that no over-voltage 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
3-51 Ramp 2 Ramp Up Time.
tdec × nnom par . 1 − 25
par .3 − 52 =
ref rpm
Function:
Enter the jog ramp time, i.e. the
acceleration/deceleration time between 0
RPM and the rated motor speed (n
in 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 =
tjog × nnom par . 1 − 25
s
jog speed par . 3 − 19
MG20O602 - VLT
AQUA Drive Programming Guide
RPM
P 4-13 RPM
high limit
P 1-25
Motor speed
P 3-19
Jog speed
P 4-11 RPM
low limit
Illustration 3.17
s
3-84 Initial Ramp Time
Range:
0.00 s [0.00 -
*
60.00 s]
s
Speed
Motor Speed
High
Motor Speed
Low
) (set
M,N
Illustration 3.18 Initial and Final Ramp Time
3-85 Check Valve Ramp Time
Range:
0.00 [0.00 -
s 60.00 s]
*
®
is a registered Danfoss trademark
t jog t jog
P 3-80 P 3-80
Ramp up Ramp down
(acc) (dec)
Function:
Enter the initial ramp up time from zero speed
to Motor Speed Low Limit, 4-11 Motor Speed
Low Limit [RPM] or 4-12 Motor Speed Low Limit
[Hz]. 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
Illustration 3.18.
Normal
Ramps
Initial Final
Ramp
Ramp
Function:
In order to protect ball check valves in a stop
situation, the check valve ramp can be utilized
as a slow ramp rate from 4-11 Motor Speed Low
Limit [RPM] or 4-12 Motor Speed Low Limit [Hz],
to Check Valve Ramp End Speed, set by the
user in 3-86 Check Valve Ramp End Speed [RPM]
or 3-87 Check Valve Ramp End Speed [HZ]. When
3-85 Check Valve Ramp Time is different from 0
seconds, the Check Valve Ramp Time is
effectuated and will be used to ramp down the
speed from Motor Speed Low Limit to the
Check Valve End Speed in 3-86 Check Valve
Time
Time