Toshiba Q9+ Installation & Operation Manual page 136

End Frequency
Program Special Frequency Control
This parameter sets the lowest frequency that the ASD will recog-
nize during deceleration before the ASD goes to 0.0 Hz.
0 Hz Dead Band Signal
Program Special Special Parameters
This parameter sets an output frequency threshold that, until the
commanded frequency surpasses this setting, the ASD will out-
put 0.0 Hz to the motor.
This setting will override the Start Frequency setting (F240) if this
setting has a higher value.
DC Injection Braking Start Frequency
Program Protection DC Braking
During deceleration, this is the frequency at which DC Injection
Braking will start.
DC Injection Braking
DC Injection Braking is a braking system used with 3-phase
motors. Unlike conventional brakes, there is no physical contact
between the rotating shaft and a stationary brake pad or drum.
When braking is required, the ASD outputs a DC current that is
applied to the windings of the motor to quickly brake the motor.
The braking current stops when the time entered in
out.
The intensity of the DC current used while braking determines
how fast the motor will come to a stop and may be set at F251.
The intensity setting is entered as a percentage of the full load
current of the ASD.
DC Injection Braking is also used to preheat the motor or to keep
the rotor from spinning freely when the motor is off by providing a
pulsating DC current into the motor at the Carrier Frequency. This
feature may be enabled at F254.
DC Injection Braking Current
Program Protection DC Braking
This parameter sets the percentage of the rated current of the
ASD that will be used for DC Injection Braking. A larger load will
require a higher setting.
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F243
Direct Access Parameter Information
Q9 Plus ASD Install/Op Manual
F252
Direct Access Number —
Parameter Type — Numerical
Factory Default — 0.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — (ASD-Dependent)
Units — Hz
Direct Access Number —
Parameter Type — Numerical
Factory Default — 0.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — (ASD-Dependent)
Units — Hz
Direct Access Number —
Parameter Type — Numerical
Factory Default — 0.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — (ASD-Dependent)
Units — Hz
F252 times
Direct Access Number —
Parameter Type — Numerical
Factory Default — 50
Changeable During Run — Yes
Minimum — 0
Maximum — 100
Units — %
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F243
F244
F250
F251