Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 68)

68 Rockwell Automation Publication 7760-UM001D-EN-P - October 2014
Chapter 3 Programming
Soft Start The following parameters are specifically used to adjust the voltage ramp
supplied to the motor.
Table 12 - Soft Start Parameters and Options
Current Limit Start To apply a fixed, reduced-output voltage to the motor, the following parameters
are provided for user adjustment.
Table 13 - Current Limit Start Parameters and Options
Parameter Description 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. 0...30 s
(2)
Initial Torque The initial reduced output voltage level for the voltage ramp to the motor is established and adjusted with
this parameter. 0...90% locked rotor torque
Kickstart Time A boost of current is provided to the motor for the programmed time period. 0.0...2.0 s
Kickstart Level Adjusts the amount of current applied to the motor during the kickstart time. 0...90% locked rotor torque
(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.
(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.
Parameter Description Option
Starting Mode This must be programmed for Soft Start. Current Limit
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. 0...30 s (2)
Current Limit Level This parameter provides adjustability for the reduced output voltage level provided to the motor. 50...60% load current
Kickstart Time A boost of current is provided to the motor for the programmed time period. 0.0...2.0 s
Kickstart Level Adjusts the amount of current applied to the motor during the kickstart time. 0...90% locked rotor torque
(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.
(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.