1-73 Flying Start
This function makes it possible to catch a motor that is spinning
freely due to a mains drop-out. Flying start searches in clockwise
direction only. If not successful, a DC brake is activated. If PM-
enabled options are selected, parking is carried out if the speed
is below 2.5–5% of nominal speed, in the time set in
parameter 2-07 Parking Time.
If the speed estimate comes out below 2.5–5% of nominal speed,
the parking function is engaged (see parameter 2-06 Parking
Current and parameter 2-07 Parking Time). Otherwise, the
frequency converter catches the motor at that speed and
resumes normal operation.
The
ying
start function used for PM motors is based on an
initial speed estimation. The speed is always estimated as the
rst
thing after an active start signal is given.
Current limitations of the ying start principle used for PM
motors:
•
The speed range is up to 100% nominal speed or the
eld weakening speed (which ever is lowest).
•
For high inertia applications (that is, where the load
inertia is more than 30 times larger than the motor
inertia).
Option: Function:
[0] Disabled
[1] Enabled
[2] Enabled Always
[3] Enabled Ref. Dir.
[4] Enab. Always Ref. Dir.
3.2.10 1-8* Stop Adjustments
Parameters for conguring special motor stop features.
1-80 Function at Stop
Option: Function:
Select this function after a stop command or
after the speed is ramped down to the
settings in parameter 1-82 Min Speed for
Function at Stop [Hz].
[0]
*
Coast Leaves the motor in free mode.
[1] DC hold /
Motor
Preheat
Energizes the motor with a DC hold current
(see parameter 2-00 DC Hold/Motor Preheat
Current).
1-82 Min Speed for Function at Stop [Hz]
Range: Function:
0 Hz
*
[0 - 20 Hz] Set the output frequency at which to
activate parameter 1-80 Function at Stop.
1-88 AC Brake Gain
Range: Function:
1.4
*
[1.0 -
2.0 ]
This parameter is used to set AC brake power
capability (set ramp-down time when inertia is
constant). In the condition that the DC-link
1-88 AC Brake Gain
Range: Function:
voltage is not higher than DC-link voltage
warning value, the generator torque can be
adjusted with this parameter.
3.2.11 1-9* Motor Temperature
Parameters for conguring the temperature protection
features for the motor.
1-90 Motor Thermal Protection
Option: Function:
Using , the motor temperature is calculated
based on frequency, current, and time. Trane
recommends using the function, if a
thermistor is not present. The functionality is
the same for asynchronous motors and PM
motors.
[0] No
protection
Disables temperature monitoring.
[1] Thermistor
warning
A thermistor gives a warning if the upper
limit of motor temperature range is
exceeded.
[2] Thermistor
trip
If the upper limit of motor temperature
range is exceeded, a thermistor gives an
alarm and makes the frequency converter
trip.
[3] ETR warning
1
If the calculated upper limit of the motor
temperature range is exceeded, a warning
occurs.
[4]
*
ETR trip 1 Start motor thermal calculation based on
actual load and time as well as motor
frequency only when the motor current is
above 110% of the nominal motor current.
[22] ETR Trip -
Extended
Detection
Start motor thermal calculation based on
actual load and time as well as motor
frequency when the motor current is above
110% of the nominal motor current. Another
situation is, start motor thermal calculation
when the motor current is less than 110% of
the nominal motor current and trigger
current limit.
1-93 Thermistor Source
Option: Function:
NOTICE
This parameter cannot be adjusted while
the motor is running.
Select the input at which the thermistor (PTC
sensor) should be connected. When using an
analog input, the same analog cannot be used
Parameters Programming Guide
BAS-SVP16B-EN 02/2017 All rights reserved. 37
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