Rockwell Automation 1302 575v AC Drive - Canada Only - Manual (Page 63)

8–5 Programming
Publication 1302-5.0 — January, 1998
FĆ01 Acceleration Time
This parameter specifies the
amount of time it takes the motor
to ramp from stop to the
maximum speed setting in FĆ04.
Parameter Range:
Default Setting:
Step Size:
0.5 to 90 seconds
5.0 seconds
0.10 seconds
If the setpoint frequency requested from the keypad (using the ąą andąą keys) is less than the
maximum speed setting, the time to ramp to that frequency will be proportionally less than the actual
rate setting. For example, if FĆ04 = 60ĂHz and FĆ01 = 4 seconds, it will take 2 seconds to ramp to a
frequency reference of 30 Hz.
Note that if the acceleration rate is set too fast, an overcurrent fault may occur (OC will be displayed).
FĆ02 Deceleration Time
This parameter specifies the
amount of time it takes the motor
to ramp from the maximum
speed setting in FĆ04 to a stop.
Parameter Range:
Default Setting:
Step Size:
0.5 to 90 seconds
5.0 seconds
0.10 seconds
If the frequency requested from the keypad (using the ąą andąą keys) is less than the maximum
speed setting, the time to ramp to that frequency will be proportionally less than the actual rate setting.
For example, if FĆ04 = 60ĂHz and FĆ02 = 4 seconds, it will take 2 seconds to ramp to a frequency
reference of 0ĂHz from 30 Hz.
Note that if the deceleration rate is set too fast, a high bus fault may occur (HU will be displayed).
FĆ03 Minimum Speed
This parameter limits the speed
reference to the Drive.
Regardless of what speed
reference is supplied, the
regulator will not command a
speed less than the value in
FĆ03.
Parameter Range:
Default Setting:
Step Size:
0.5 to 30 Hz
5.0 Hz
0.10 Hz if FĆ04 < 100 Hz
0.25 Hz if FĆ04 ≥ 100 Hz
!
ATTENTION: The 1302 Drive is intended to operate the motor at a predetermined
minimum speed unless disconnected from the power source. The user is responsible for
assuring safe conditions for operating personnel by providing suitable guards, audible or
visual alarms, or other devices to indicate that the drive is operating at minimum speed,
(possibly zero speed), or the user must verify that the motor output shaft will rotate at all
combinations of load and output speed required by the application.