Rockwell Automation MV SMC Flex Motor Controller (for Series K or later) - Manual (Page 17)

Rockwell Automation Publication 1560E-UM051F-EN-P - June 2013 7
Product Overview Chapter 1
Linear deceleration does not need to be used, even if linear acceleration is used.
The stop time can be programmed for 0 to 120 seconds. Linear deceleration
cannot brake the motor/load and reduce the stop time.
Soft Stop
This feature can be used in applications that require an extended coast-to-rest
time. The voltage ramp-down time is user-adjustable from 0 to 120 seconds and
is adjusted independently from the starting time. The load will stop when the
output voltage drops to a point where the load torque is greater than the
developed motor torque.
Figure 8 - Soft Stop Option
IMPORTANT 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.
ATTENTION: Linear Deceleration is not intended to be used as an emergency
stop. Such usage may result in severe injury or death. Refer to the applicable
standards for emergency stop requirements.
Kickstart
100%
Initial
Torque
Percent
Voltage
Run
Time (seconds)
Start Soft Stop
Coast-to-rest
Soft Stop
TIP 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.
ATTENTION: Soft Stop is not intended to be used as an emergency stop. Such
usage may result in severe injury or death. Refer to the applicable standards for
emergency stop requirements.