Danfoss vlt FC 102 User Manual

3-41 Ramp 1 Ramp Up Time
Range: Function:
Application
dependent*
[Application dependant] Enter the ramp-up time, i.e. the acceleration time from 0 RPM to par. 1-25 Motor Nominal Speed .
Choose a ramp-up time such that the output current does not exceed the current limit in
par. 4-18 Current Limit during ramping. See ramp-down time in par. 3-42 Ramp 1 Ramp Down
Time .
par .3 − 41 =
tacc × nnorm par .1 − 25
ref rpm
s
3-42 Ramp 1 Ramp Down Time
Range: Function:
Application
dependent*
[Application dependant] Enter the ramp-down time, i.e. the deceleration time from par. 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 par. 4-18 Current Limit . See ramp-up time in par. 3-41 Ramp 1 Ramp Up Time .
par .3 − 42 =
tdec × nnorm par .1 − 25
ref rpm
s
4-14 Motor Speed High Limit [Hz]
Range: Function:
Application
dependent*
[Application dependant] Enter the maximum limit for motor speed. The Motor Speed High Limit can be set to correspond to
the manufacturer’s recommended maximum of the motor shaft. The Motor Speed High Limit must
exceed the in par. 4-12 Motor Speed Low Limit [Hz] . Only par. 4-11 Motor Speed Low Limit
[RPM] or par. 4-12 Motor Speed Low Limit [Hz] will be displayed depending on other parameters in
the Main Menu and depending on default settings dependant on global location.
NB!
Max. output frequency cannot exceed 10% of the inverter switching frequency (par. 14-01 Switching Frequency ).
4-12 Motor Speed Low Limit [Hz]
Range: Function:
Application
dependent*
[Application dependant] Enter the minimum limit for motor speed. 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 par. 4-14 Motor Speed High Limit [Hz] .
4-13 Motor Speed High Limit [RPM]
Range: Function:
Application
dependent*
[Application dependant] Enter the maximum limit for motor speed. 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
par. 4-11 Motor Speed Low Limit [RPM] . Only par. 4-11 Motor Speed Low Limit [RPM] or
par. 4-12 Motor Speed Low Limit [Hz] will be displayed depending on other parameters in the Main
Menu and depending on default settings dependant on global location.
NB!
Max. output frequency cannot exceed 10% of the inverter switching frequency (par. 14-01 Switching Frequency ).
NB!
Any changes in par. 4-13 Motor Speed High Limit [RPM] will reset the value in par. 4-53 Warning Speed High to the same value as set
in par. 4-13 Motor Speed High Limit [RPM] .
VLT HVAC Low Harmonic Drive Operating In-
structions 6 How to Programme the Low Harmonic Drive
MG.16.A1.02 - VLT
®
is a registered Danfoss trademark 89
6

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English