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
Semi-Auto Bypass Set-up.
3.
Press
Hand On
on the keypad 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 keypad when leaving the band. The actual
frequency will be stored as the first element in par.4-62
Bypass Speed To [RPM] or par.4-63 Bypass Speed
To [Hz] (array). Repeat this for each resonance band identified at the ramp-up (maximum four can be ad-
justed).
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 frequen-
cies registered when pressing
OK
will be stored in par.4-60 Bypass Speed From [RPM] or par.4-61 Bypass
Speed From [Hz].
6.
When the motor has ramped down to stop, press
OK
. The par.4-64 Semi-Auto Bypass Set-up will automat-
ically reset to Off. The frequency converter will stay in
Hand
mode until
Off
or
Auto On
are pressed on the
keypad.
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
.
4-64 Semi-Auto Bypass Set-up
Option: Function:
[0] * Off No function
[1] Enabled Starts the Semi-Automatic Bypass set-up and continue with the proce-
dure described above.
Parameter Description
TR200 Programming Guide 87
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