Danfoss VLT 2020 User Manual

MG.20.B6.02 – VLT is a registered Danfoss trademark
69
VLT
®
2000 Series
Section 1 Section 2 Section 3
✭ = Factory setting. Text in ( ) = Display text. The figures in [ ] are used in bus communication.
Description of parameters
215 Ramp-up time 1 (RAMP UP TIME)
Value:
0.1 - 800 seconds ✭ 5 s
Function:
Using this parameter you can record the required
acceleration time from 0.1 Hz to the rated output
frequency (parameter 105).
Description:
To ensure the fastest possible start, choose a value
for the ramp-up time so that the current limit is not
activated. The ramp-up time is always defined as
the acceleration time from 0 Hz to the rated motor
frequency.
216 Ramp-down time 1 (RAMP DOWN TIME)
Value:
0.1 - 800 seconds ✭ 5 s
Function:
Using this parameter you can record the required de-
celeration time from rated output frequency to 0 Hz.
Description:
The ramp-down time can be selected in the range
0.1-800 seconds. If the ramp-down time is too
short the VLT’s voltage limit becomes active, which
will extend the ramp-down time. Short ramp-down
times will require a VLT unit with a brake function
and installation of a brake resistor. The ramp-down
time is always defined as the deceleration time
from the rated motor frequency to 0 Hz.
210 Warning: frequency low (LOW FREQ WARN)
Value:
0 - 500 H
Z ✭ 0 Hz
Function:
Using this parameter you can set a value for when
alarm must be given for f
LOW
within the normal
operational range of the VLT frequency converter.
Description:
If the output frequency falls below the warning limit
f
LOW
, the display shows: LOW FREQ ALARM.
You can also choose to program the signal outputs in
parameters 408 and 409 to give a signal.
211 Warning: frequency high (HI FREQ WARN)
Value:
0 - 500 Hz ✭ 120 Hz
Function:
Using this parameter you can set a value for when
alarm must be given for f
HIGH
within the normal
operational range of the VLT frequency converter.
Description:
If the output frequency exceeds the warning limit f
HIGH,
the display shows: HI FREQ ALARM.
You can also choose to program the signal outputs in
parameters 408 and 409) to give a signal.
213 Warning: current high (HI CURR WARN)
Value:
0.0 - I
VLT,MAX
✭ I
VLT,MAX
Function:
Using this parameter you can set a value for when
alarm must be given for I
HIGH
within the normal
operational range of the VLT frequency converter.
Description:
If the output current exceeds the warning limit I
HIGH
the display shows: HI CURR ALARM.
You can also choose to program the signal outputs in
parameters 408 and 409 to give a signal.
218 Quick stop ramp (ALT: DOWN RAMP)
Value:
0.1 - 800 seconds ✭ 1 s
Function:
Using this parameter you can choose an alternative
deceleration ramp - a programmable quick stop ramp.
Description:
The ramp-down time can be selected in the range
0.1-800 seconds, calculated from the rated frequency
to 0 Hz. If the ramp-down time is too short the VLT’s
voltage limit becomes active, which will extend the
ramp-down time. Short ramp-down times will require
a VLT unit with a brake function and installation of a
brake resistor.
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Danfoss VLT 2020 Specifications

General

Brand	Danfoss
Model	VLT 2020
Category	Inverter
Language	English