Danfoss VLT HVAC Drive FC 100 Operating Instructions Manual page 73

®
VLT HVAC DRIVE High Power
Operating Instruction
1-25 Motor Nominal Speed
Range:
Size re-
lated
This parameter cannot be adjusted while the motor is running.
3-41 Ramp 1 Ramp up Time
Range:
*
3 s
3-42 Ramp 1 Ramp Down Time
Range:
*
3 s
Function:
[100 - 60,000 RPM] Enter the nominal motor speed value from the motor nameplate
* data. This data is used for calculating automatic motor com-
pensations.
Function:
[1 - 3600 s] Enter the ramp-up time, i.e. the acceleration time from 0 RPM
to the rated motor speed n
time such that the output current does not exceed the current
limit in par. 4-18 during ramping. See ramp-down time in par.
3-42.
par
Function:
[1 - 3600 s] Enter the ramp-down time, i.e. the deceleration time from the
rated motor speed n
down time such that no over-voltage arises in the inverter due
to regenerative operation of the motor, and such that the gen-
erated current does not exceed the current limit set in par. 4-18.
See ramp-up time in par. 3-41.
par
MG.11.F1.02 - VLT ® is a registered Danfoss trademark
(par. 1-25). Choose a ramp-up
M,N
t × n par
acc norm
.3 − 41 =
ref rpm
Δ
(par. 1-25) to 0 RPM. Choose a ramp-
M,N
t n par
×
dec norm
.3 − 42 =
ref rpm
Δ
4. How to Programme
.1 − 25
s
.1 − 25
s
4
73