Toshiba H7 Operation Manuals page 87

F181
Electronic Thermal Protection #4
Program Motor Parameters
⇒
The Motor #4 Electronic Thermal Protection parameter specifies the motor
overload current level for motor set #4. This value is entered as either a
percentage of the full load rating of the ASD or as the FLA of the motor.
The unit of measurement for this parameter may be set to Amps (V/A) or it
may be set as a percentage of the ASD rating. The name-plated FLA of the
motor may be entered directly when Amps is selected as the unit of
measurement (see F701 to change the display unit).
Electronic Thermal Protection settings (#1 – #4) will be displayed in Amps if
the EOI display units are set to V/A rather than %.
V/f Adjustment Coefficient
Program Special Control Parameters
⇒
Adjustment Coefficient
This parameter may be used in the Constant Torque or the Variable Torque
modes only and should be adjusted gradually to improve the application-
specific torque requirements. The Torque Boost setting (F016) may be adjusted
to improve the low-frequency torque performance.
Note: The Torque Boost setting should be adjusted gradually before
attempting performance corrections using this parameter.
Custom V/f Five-Point Setting #1 Frequency
Program ⇒ Special Control Parameters
The Custom V/f Five-Point Setting #1 Frequency setting establishes the
frequency that is to be associated with the voltage setting of
Five-Point Setting #1 Voltage).
The V/f five-point settings (total 10) define a custom volts per hertz relationship
for the startup output of the ASD.
To enable this function, set the V/f Pattern (F015) selection to Custom V/f
Curve.
Custom V/f Curves may be useful in starting high inertia loads such as rotary
drum vacuum filters.
80
Motor Set #4
⇒
Special Parameters
⇒
⇒ V/f Five-Point Setting
F191
Direct Access Number — F181
Parameter Type — Numerical
Factory Default — 100.0
Changeable During Run — Yes
Minimum — 10.0
Maximum — 100.0
Units — %
Direct Access Number — F183
V/f
⇒
Parameter Type — Numerical
Factory Default — 32
Changeable During Run — Yes
Minimum — 0
Maximum — 255
Direct Access Number — F190
Parameter Type — Numerical
Factory Default — 0.0
(Custom V/f
Changeable During Run — No
Minimum — 0.0
Maximum — 400
Units — Hz
F190
H7 ASD Operation Manual