Danfoss vlt aqua Programming Guide

4-62 Bypass Speed To [RPM]
Array [4]
0 RPM *
[0 - par. 4-13 RPM] Some systems call for avoiding certain output speeds due to
resonance problems in the system. Enter the upper limits of the
speeds to be avoided.
4-63 Bypass Speed To [Hz]
Array [4]
0 Hz *
[0 - par. 4-14 Hz] Some systems call for avoiding certain output speeds due to
resonance problems in the system. Enter the upper limits of the
speeds to be avoided.
2.6.5. Semi-Automatic Bypass Speed Set-up
The Semi-Automatic Bypass Speed Setup can be used to facilitate the programming of the fre-
quencies to be skipped due to resonances in the system.
The following process is to be carried out:
1. Stop the motor.
2. Select Enabled in par. 4-64,
Semi-Auto by-pass Feature .
3. Press
Hand On on the Local Control Panel to start the search for frequency bands causing
resonances. The motor will ramp up according to the ramp set.
4. When sweeping through a resonance band, press
OK on the Local Control Panel when
leaving the band. The actual frequency will be stored as the first element in the par. 4-62,
By Pass Speed To [RPM] or par. 4-63, By Pass Speed To [Hz] (array). Repeat this for
each resonance band identified at the ramp up (maximum four can be adjusted).
5. When maximum speed has been reached, the motor will automatically begin to ramp
down. Repeat the above procedure when speed is leaving the resonance bands during
the deceleration. The actual frequencies registered when pressing
OK will be stored in
par. 4-60,
By Pass From [RPM] or par. 4-61, By Pass From [Hz] .
6. When the motor has ramped down to stop, press
OK . The par. 4-64, Semi-Auto By-pass
Feature
will automatically reset to Off. The frequency converter will stay in Hand On
mode until Off or Auto On are pressed on the Local Control Panel.
If the frequencies for a certain resonance band are not registered in the right order (frequency
values stored in
By Pass Speed To are higher than those in By Pass Speed From ) or if they do not
have the same numbers of registrations for the
By Pass From and By Pass To , all registrations will
be cancelled and the following message is displayed:
Collected speed areas overlapping or not
completely determined. Press [Cancel] to abort
.
VLT
®
AQUA Drive Programming Guide 2. Parameter Description
MG.20.O2.02 - VLT
®
is a registered Danfoss trademark 75
2

Danfoss vlt aqua Specifications

General

Supply Voltage	200-240V, 380-500V, 525-600V
Enclosure	IP20
Features	Energy optimization
Approvals	CE, UL, cUL
Input Voltage Range	200-240V, 380-500V, 525-600V
Output Voltage Range	0 to supply voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Ground fault
Communication Interfaces	PROFIBUS
Cooling Method	Air-cooled