Rockwell Automation DC3E Non-Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 49)

41 Operation
Alternate Starting and Stopping Methods
ATTENTION: The DC3 Drive is intended to operate
at a predetermined minimum speed. If the application
requires zero speed operation, the user is responsible for
assuring safe conditions for operating personnel by
providing suitable guards, audio or visual alarms, or
other devices. Failure to observe these precautions
could result in bodily injury.
ATTENTION: For frequent starts and stops, use
coasting to a stop with a STOP pushbutton, decelerating
to minimum speed (shorting S2 and S1 to each other),
or dynamic braking. Do not use any of these methods
for emergency stopping. They may not stop a drive that
is malfunctioning. Removing AC line power (both L1
and L2) is the only acceptable method for emergency
stopping.
ATTENTION: Frequent starts and stops, coasting to a
stop, decelerating to minimum speed, and dynamic
braking produce high current. This may cause damage
to motors, especially gearmotors, that are not properly
sized for the application.
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