Full voltage start, Linear speed, Stop control – Rockwell Automation MV SMC Flex Motor Controller (for Series K or later) User Manual
Page 91: Full voltage start linear speed stop control
Rockwell Automation Publication 1560E-UM051F-EN-P - June 2013
81
Programming
Chapter 4
Full Voltage Start
The SMC Flex controller may be programmed to provide a full voltage start
(output voltage to the motor reaches full voltage within 1/4 second) with the
following programming:
Linear Speed
The SMC Flex provides the user the ability to control the motor speed during
starting and stopping maneuvers. A tach input is required as specified in
Speed Acceleration and Deceleration on page 6 of Chapter 1
Stop Control
The SMC Flex can be programmed to extend the motor stop time beyond the
normal coast-to-rest time. There are two standard stop modes: Soft Stop and
Linear Speed Deceleration.
Parameter
Option
Starting Mode
This must be programmed for Full Voltage.
Full Voltage
Parameter
Option
Starting Mode
This must be programmed for Linear Speed.
Linear Speed
Ramp Time
(1)
Programs the time period that the controller will ramp
from 0 speed to full voltage.
(1) 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.
0 to 30 s
Kickstart Time
A boost of current is provided to the motor for the
programmed time period.
0.0 to 2.2 s
Kickstart Level
Adjusts the amount of current applied to the motor
during the kickstart time.
0 to 90% locked rotor torque
Parameter
Option
Stopping Mode
This may be set to one of two
standard choices.
(1)
(1) Refer to
for optional stop control modes.
Soft Stop
Linear Speed
(2)
(2) A motor tachometer is required (refer to
Linear Speed Acceleration and Deceleration on page 6
Stop Time
Allows the user to set the time period
for the stopping function.
0 to 120 s
(3)
(3) Consult factory if settings over 30 seconds are required. The base rating of the MV SMC Flex is two starts (or one start/stop
combination) per hour, thirty seconds maximum for each operation. A stopping operation counts as a start for purposes of thermal
capacity calculations.
TIP
Options that control the stopping of the motor (Soft Stop, Pump Stop, Linear
Speed, Braking) require the self-powered gate drivers to be pre-charged by the
current loop power supply. If this supply is not present, an alarm symbol will
appear at the upper right corner of the control module display, and the options
will be inhibited. When the motor is stopped, it will coast. If the supply is
restored, the alarm symbol will be cleared and the module will perform the
programmed sequence.