15 • Control Keypad
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Potentiometer
Range
Description
Initial Voltage
10-80%
Determines the initial voltage to the motor (torque is directly proportional
to the square of the voltage).
Range: 10-80% of nominal voltage.
This adjustment also determines the inrush current and mechanical
shock.
Too high of a setting may cause high initial mechanical shock and high
inrush current (even if Current Limit is set low, as the Initial Voltage
setting over-rides the Current Limit setting).
Too low of a setting may result in prolonged time until motor starts
revolving. The motor should start revolving immediately after Start signal
Current Limit
100-400%
Determines motor's highest current during starting.
Range is 100-400% of FLC (as set on motor's FLC adjustment).
Too high of a setting will allow higher currents to be drawn from mains,
resulting in faster acceleration.
Too low of a setting may prevent the motor from completing the
acceleration process and reaching full speed.
Generally, this setting should be set to the highest acceptable value in
order to prevent stalling.
Caution
Starting Current and time should not exceed the allowable conditions as
shown on section
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on page
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.
Ramp Up
0.5-10 sec.
Determines motor's voltage ramp-up time from initial to full voltage.
It is recommended to set Ramp-Up Time to the minimum acceptable
value (approx. 5 Sec).
Notes:
1. Setting Current Limit low will extend Ramp-Up Time.
2. When motor reaches full speed before voltage reaches nominal,
Ramp-Up Time adjustment is overridden, causing voltage to quickly
ramp up to nominal.
U%
10%
80%
100%
2
30
Sec.
I%
600%
100%
400%
Sec.
U%
100%
0.5
10
Sec.
