Main Menu - Digital In/Out - Group - Danfoss VLT FC 100 Series Programming Manual

3. Parameter Description
4-62 Bypass Speed To [RPM]
Array [4]
*
0 RPM [0 - par. 4-13 RPM]
4-63 Bypass Speed To [Hz]
3
Array [4]
*
0 Hz [0 - par. 4-14 Hz]
3.6.5. Semi-Automatic Bypass Speed Set-up
The Semi-Automatic Bypass Speed Setup can be used to facilitate the programming of the frequencies 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,
3. Press Hand On
ramp set.
4. When sweeping through a resonance band, press
the first element in the par. 4-62,
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
[RPM]
or par. 4-61,
6. When the motor has ramped down to stop, press
converter will stay in
If the frequencies for a certain resonance band are not registered in the right order (frequency values stored in
By Pass Speed From
in
and the following message is displayed:
4-64 Semi-Auto By-pass Feature
Option:
* Off
[0]
[1] Enabled

3.7. Main Menu - Digital In/Out - Group 5

3.7.1. 5-** Digital In/Out
Parameter group for configuring the digital input and output.
3.7.2. 5-0* Digital I/O Mode
Parameters for configuring the input and output using NPN and PNP.
64
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.
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.
Semi-Auto by-pass Feature
on the Local Control Panel to start the search for frequency bands causing resonances. The motor will ramp up according to the
OK
By Pass Speed To [RPM]
By Pass From [Hz]
.
OK
Hand On Off Auto On
mode until or
) or if they do not have the same numbers of registrations for the
Collected speed areas overlapping or not completely determined. Press [Cancel] to abort
Function:
No function
Starts the Semi-Automatic Bypass set-up and continue with the procedure described above.
MG.11.C5.02 - VLT
.
on the Local Control Panel when leaving the band. The actual frequency will be stored as
By Pass Speed To [Hz]
or par. 4-63,
Semi-Auto By-pass Feature
. The par. 4-64,
are pressed on the Local Control Panel.
By Pass From
® is a registered Danfoss trademark
®
VLT HVAC Drive Programming Guide
(array). Repeat this for each resonance band
OK
will be stored in par. 4-60,
will automatically reset to Off. The frequency
By Pass Speed To are higher than those
By Pass To
and , all registrations will be cancelled
.
By Pass From