Rockwell Automation MV SMC Flex Motor Controller (for Series K or later) - Manual (Page 90)

80 Rockwell Automation Publication 1560E-UM051F-EN-P - June 2013
Chapter 4 Programming
Dual Ramp Start The SMC Flex controller provides the user with the ability to select between two
Start settings. The parameters below are available in the Setup programming
mode. To obtain Dual Ramp control, Ramp #1 is located in the Basic Setup and
Ramp #2 is located in the Option 2 Input (Dual Ramp).
Parameter Option
Set Up
The user must select the Set-up programming mode to
obtain access to the Dual Ramp parameters.
–
Basic Set-up/Starting Mode
Set-up as stated in previous pages.
–
Option Input 2 (Dual Ramp)
(1)
This allows the user the option to choose between two
Soft Start profiles defined by:
1. Start Mode/Ramp Time/Initial Torque, and
2. Start Mode 2/Ramp Time 2/Initial Torque 2.
When this feature is turned on, the ramp time/initial
torque combination is determined by a hard contact input
to terminal 15. When this input signal is low, ramp time/
initial torque are selected. When input signal is high,
ramp time 2/initial torque 2 are selected. Once the Option
2 input has been set to Dual Ramp, you must ESC back to
the Parameter (File) menu. Re-enter into the Set Up
menu to show both Basic Set Up and Dual Ramp.
(1) The Dual Ramp feature is available on the standard controller.
–
Basic Set Up/Start Mode (2)
This selects the start mode for option #1.
(2) Kickstart can be programmed for both start modes.
–
Basic Set-up/Ramp Time
This programs the time period during which the controller
will ramp the output voltage up to full voltage for the first
Start set-up. 0 to 30 s
Basic Set-up/Initial Torque
This parameter establishes and adjusts the initial reduced
output voltage level for the first Soft Start set-up. 0 to 90% locked rotor torque
Dual Ramp/Start Mode 2
(2)
This selects the start motor for option #2.
–
Dual Ramp/Ramp Time 2
This programs the time period during which the controller
will ramp the output voltage up to full voltage for the
second Start set-up. 0 to 30 s
(3)
(3) For ramp times greater than 30 s, set “Ramp Time 2” to zero and program “Start Time 2E” (parameter 130) for the new time. Do not
exceed the thermal capacity of the controller.
Dual Ramp/Initial Torque 2
The initial reduced output voltage level for the second
Start set-up is established and adjusted with this
parameter. 0 to 90% locked rotor torque