NOTICE
Smaller frequency converters have a ramp time of 3
seconds which can make it difficult to set the bypass
speeds. Adjust the ramp times in
and
2.
Select
[1] Enabled
in
3.
Press [Hand On] to start the search for frequency
bands causing resonances. The motor ramps up
according to the ramp set.
NOTICE
Terminal 27 Digital Input
5-12 Terminal 27 Digital Input
has coast inverse as default setting. This means that
[Hand On] does not start the motor if there is no 24 V to
terminal 27, so connect terminal 12 to terminal 27.
4.
When sweeping through a resonance band, press
[OK] on the LCP when leaving the band. The
actual frequency is stored as the first element in
(array). Repeat this for
each resonance band identified at the ramp-up
(maximum three 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] are stored in
6.
When the motor has ramped down to stop, press
[OK]. The
automat-
ically resets to Off. The frequency converter stays
in
Hand On
mode until [Off] or [Auto On] is
pressed.
If the frequencies for a certain resonance band are not
registered in the right order (frequency values stored in
are higher than those in
) or if they do not have the
same numbers of registrations for the
and
, all registrations
are canceled and the following message is displayed:
Collected speed areas overlapping or not completely
determined. Press [Cancel] to abort
.
4-64 Semi-Auto Bypass Set-up
Option:
Function:
[0]
*
Off
[1]
Enable
Parameters
VLT
®
HVAC Basic Drive FC 101 Programming Guide
MG18B302 - Rev. 2013-09-02
37
3
3