Rockwell Automation MV SMC Flex Motor Controller (for Series K or later) - Manual (Page 89)

Rockwell Automation Publication 1560E-UM051F-EN-P - June 2013 79
Programming Chapter 4
Soft Start The following parameters are specifically used to adjust the voltage ramp
supplied to the motor.
Current Limit Start To apply a fixed, reduced-output voltage to the motor, the following parameters
are provided for user adjustment:
Parameter Option
Starting Mode
This must be programmed for Soft Start. Soft Start
Ramp Time
(1)
Programs the time period that the controller will ramp the
output voltage up to full voltage from the initial Torque
level programmed.
(1) If the controller senses that the motor has reached full speed before completing the Soft Start, it will automatically switch to
providing full voltage to the motor.
0 to 30 s
(2)
(2) For ramp times greater than 30 s, set “Ramp Time” to zero and program “Ramp Time E” (parameter 129) to the new time. Do not
exceed the thermal capacity of the controller.
Initial Torque
The initial reduced output voltage level for the voltage
ramp to the motor is established and adjusted with this
parameter. 0 to 90% locked rotor torque
Kickstart Time
A boost of current is provided to the motor for the
programmed time period. 0.0 to 2.0 s
Kickstart Level
Adjusts the amount of current applied to the motor
during the kickstart time. 0 to 90% locked rotor torque
Parameter Option
Starting Mode
This must be programmed for Current Limit. Current Limit
Ramp Time
(1)
Programs the time period that the controller will hold the
fixed, reduced output voltage before switching to full
voltage.
(1) If the controller senses that the motor has reached full speed before completing the Soft Start, it will automatically switch to
providing full voltage to the motor.
0 to 30 s
(2)
(2) For ramp times greater than 30 s, set “Ramp Time” to zero and program “Ramp Time E” (parameter 129) to the new time. Do not
exceed the thermal capacity of the controller.
Current Limit Level
This parameter provides adjustability for the reduced
output voltage level provided to the motor. 50 to 600% full load current
Kickstart Time
A boost of current is provided to the motor for the
programmed time period. 0.0 to 2.0 s
Kickstart Level
Adjusts the amount of current applied to the motor
during the kickstart time. 0 to 90% locked rotor torque