Danfoss VLT AQUA Drive FC 200 Operating Instructions Manual page 81

How to Programme the Low Ha...
P3-03
P3-02
6 6
0
Preset 76543210
10101010
11001100
11110000
3-41 Ramp 1 Ramp Up Time
Range:
Size
related 3600.00 s]
*
tacc × nnorm par .1 − 25
par .3 − 41 =
3-42 Ramp 1 Ramp Down Time
Range:
Size [
related 3600.00 s]
*
80
50
12 (+24V)
29 [P 5-13=Preset ref. bit 0]
32 [P 5-14=Preset ref. bit 1]
33
[P 5-15=Preset ref. bit 2]
Function:
[ 1.00 - 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
3-42 Ramp 1 Ramp Down Time.
s
ref rpm
Function:
1.00 - 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
MG20T202 - VLT
VLT AQUA Low Harmonic Drive Operating Instructions
3-42 Ramp 1 Ramp Down Time
Range:
par .3 − 42 =
3-84 Initial Ramp Time
Range:
0.00 s
*
P3-10
100%
3-85 Check Valve Ramp Time
Range:
0.00
s
*
3-86 Check Valve Ramp End Speed [RPM]
Range:
Size related
®
is a registered Danfoss trademark
Function:
4-18 Current Limit. See ramp-up time in
3-41 Ramp 1 Ramp Up Time.
tdec × nnorm par .1 − 25
s
ref rpm
Function:
[0.00 - Enter the initial ramp up time from zero
60.00 s] 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.
Function:
[0.00 - In order to protect ball check valves in a stop
60.00 s] 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
Ramp End Speed [RPM] or 3-87 Check Valve
Ramp End Speed [HZ].
Speed
Motor Speed
High
Motor Speed
Low
Check valve
End Speed
Function:
[ 0 - par. Set the speed in [RPM] below
*
4-11 RPM] Motor Speed Low Limit where the
Check Valve is expected to be
closed and the Check Valve no
longer shall be active.
Normal
Ramp
Time