H-08 Reverse Lock
Option:
Function:
NOTICE
has impact on the flying start in
Selects the motor speed direction required.
Use this parameter to prevent unwanted
reversing.
[0]
Clockwise
Only operation in clockwise direction is
allowed.
[2]
*
Both
directions
Operation in both clockwise and counter-
clockwise direction is allowed.
H-09 Start Mode
Option:
Function:
This function enables catching a motor which is
spinning freely due to a mains drop-out.
When
is enabled,
has no function.
Search direction for flying start is linked to the
setting in
.
[0] Clockwise
: Flying start searches in clockwise
direction. If not successful, a DC brake is activated.
[2] Both Directions
: The flying start first makes a
search in the direction determined by the last
reference (direction). If the speed is not found, it
makes a search in the other direction. If not
successful, a DC brake is activated in the time set
in
parameter B-02 DC Braking Time
. Start then takes
place from 0 Hz.
[0]
*
Disabled Select
[0] Disable
if this function is not required.
[1]
Enabled
Select
[1] Enable
to enable the frequency converter
to catch and control a spinning motor.
The parameter is always set to
[1] Enable
parameter P-20 Motor Construction
=[1] PM non-
salient.
Important related parameters:
•
Parameter H-58 Flying Start Test Pulses
•
Parameter H-59 Flying Start Test Pulses
•
•
Parameter B-06 Parking Current
•
•
Parameter B-03 DC Brake Cut In Speed
•
Parameter B-04 DC Brake Cut In Speed [Hz]
•
Parameter B-06 Parking Current
H-09 Start Mode
Option:
Function:
•
The flying-start function used for PM motors is based on
an initial speed estimation. The speed is always estimated
as the first thing after an active start signal is given. Based
on the setting of
following happens:
[0] Rotor Detection
:
If the speed estimate appears as greater than 0 Hz, the
frequency converter catches the motor at that speed and
resumes normal operation. Otherwise, the frequency
converter estimates the rotor position and start normal
operation from there.
[1] Parking
:
A speed estimate lower than the setting in
parameter H-59 Flying Start Test Pulses Frequency
engages
the parking function (see
parameter B-06 Parking Current
and
). Otherwise, the frequency
converter catches the motor at that speed and resumes
normal operation. Refer to the description of
for recommended settings.
Current limitations of the flying-start principle used for PM
motors:
•
The speed range is up to 100% nominal speed or
the field weakening speed (whichever is lowest).
•
PMSM with high back EMF (>300 VLL(rms)) and
high winding inductance (>10 mH) needs more
time for reducing short-circuit current to 0 and
may be susceptible to error in estimation.
•
Current testing limited to a speed range up to
300 Hz. For certain units, the limit is 250 Hz; all
200–240 V units up to and including 2.2 kW
(3 hp) and all 380–480 V units up to and
including 4 kW (5.36 hp).
Parameter Description
AF-600 FP
™
Programming Guide
DET-620D
03/2016 All rights reserved.
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