Rockwell Automation 7763 Medium Voltage OneGear SMC Flex Motor Controller (10-15 kV) - Manual (Page 24)

24 Rockwell Automation Publication 7760-UM001D-EN-P - October 2014
Chapter 1 Product Overview
Dual Ramp Start
This starting mode is useful for applications that have varying loads (and
therefore varying starting torque requirements). Dual Ramp Start allows the user
to select between two separate Soft Start profiles with separately adjustable ramp
times and initial torque settings.
Table 2 - Dual Ramp Start
Dual Ramp Start is available only with the standard controller.
Full Voltage Start
This starting mode is used for applications requiring across-the-line starting. The
output voltage to the motor will reach full voltage within 1/4 second.
Table 3 - Full Voltage Start
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.
–
Basic Set Up/Start Mode
(2)
This selects the start mode for option #1.
–
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…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…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…30 s (3)
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…90% locked rotor torque
(1) The Dual Ramp feature is available on the standard controller.
(2) Kickstart can be programmed for both start modes.
(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.
Parameter Option
Starting Mode
This must be programmed for Full Voltage.
Full Voltage