HX7+ ASD Installation and Operation Manual 77
V/f Pattern
Program Fundamentals Frequency Settings
This function establishes the relationship between the output frequency and the
output voltage.
Settings:
0 — Constant Torque
1 — Variable Torque
2 — Automatic Torque Boost
3 — Sensorless Vector Control (speed)
4 — Auto Torque Boost with Automatic Energy Savings
5 — Sensorless Vector Control (speed) with Automatic Energy Savings
6 — V/f 5-Point Setting (opens 5-point setting screen)
7 — Sensorless Vector Control (speed/torque switching)
8 — PG Feedback Vector Control (speed/torque switching)
9 — PG Feedback Vector Control (speed/position switching)
Note: For proper operation, the carrier frequency must be 2.2 kHz or
above except while operating in the Constant Torque, Variable
Torque, or the 5-Point Setting modes.
The Automatic Torque Boost and the Sensorless Vector Control selections
use the motor tuning parameters of the drive to properly configure the ASD for
the motor being used. If Load Reactors or Long Lead Filters are used, or if
the capacity of the ASD is greater than the motor, manual tuning of the motor
parameters may be required for optimum performance.
Direct Access Number — F015
Parameter Type — Selection List
Factory Default — Constant Torque
Changeable During Run — No
Motor #1 Torque Boost
Program Fundamentals Motor Set #1
The Motor #1 Torque Boost function is used to increase the low frequency
torque for high-inertia loads by increasing the output voltage at frequencies
below ½ of the #1 Base Frequency (
F014) setting.
The value programmed as a boost percentage establishes an output voltage vs.
output frequency relationship to be used to start the motor or to provide
smoother operation.
Note: Setting an excessive Torque Boost level may cause nuisance
tripping and mechanical stress to loads.
Direct Access Number — F016
Parameter Type — Numerical
Factory Default — (ASD dependent)
Changeable During Run — Ye s
Minimum — 0.0
Maximum — 30.0
Units — %
F015 F016
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