Rockwell Automation Liqui-Flo AC Power Modules - Manual (Page 63)

Wiring the Regulator Board and RMI Board Terminal Strips 7-7
7.1 Stopping the Drive
Depending upon the requirements of the application, the LiquiFlo drive can be
programmed to provide either a coast-to-rest or a ramp-to-rest operational stop
without physical separation of the power source from the motor.
A coast-to-rest stop turns off the transistor power device drivers.
A ramp-to-rest stop fires the transistor power device drivers until the motor comes to a
stop, and then turns off the power devices.
The user can also program zero speed with power maintained to the motor, but in this
condition, the drive is not actually stopped. See the description of terminals 23 and 24
or Stop Type (P.025) for more information on how to program the operational stop.
In addition to the operational stop, the user must provide a hardwired emergency stop
external to the drive. The emergency stop circuit must contain only hardwired
electromechanical components. Operation of the emergency stop must not depend on
electronic logic (hardware or software) or on the communication of commands over an
electronic network or link.
Parameter P.055 (STOP/RESET Key Disable) can be used to change the operation of
the STOP/RESET key. See the parameter P.055 description in the software manual for
more information.
Note that the user-installed hardwired emergency stop may be used at any time to
stop the drive.
!
ATTENTION: When P.055 is set to ON, the STOP/RESET key is
functional only from the selected control source. As a safety precaution,
Reliance recommends that an emergency stop push button be located
near the drive in an easily accessible location. As a further safety
precaution, the user should post a warning on the drive to alert personnel
that the STOP/RESET key is not functional. Failure to observe this
precaution could result in severe bodily injury or loss of life.
ATTENTION: The user must provide an external, hardwired emergency
stop circuit outside of the drive circuitry. This circuit must disable the
system in case of improper operation. Uncontrolled machine operation
may result if this procedure is not followed. Failure to observe this
precaution could result in bodily injury.