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7.1 Stopping the Drive
Depending upon the requirements of the application, the GV3000/SE 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 P.055 parameter 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.
7.1.1 Compliance with Machinery Safety Standard EN 60204-1:1992
This section applies to users who must comply with machinery safety standard EN
60204-1:1992, part 9.2.5.4, Emergency Stop.
The GV3000/SE drive coast-to-rest stop is a category 0 operational stop. The
ramp-to-rest stop is a category 1 operational stop. In addition, it is possible to
implement a category 2 stop, with power maintained to the motor at zero speed.
The required external hardwired emergency stop must be either a category 0 or 1
stop, depending on the user's risk assessment of the associated machinery. In order
to fully comply with machinery safety standard EN60204-1:1992, part 9.2.5.4, at least
one of the two stop methods must be a category 0 stop. Refer to Appendix B for more
information.
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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 Electric 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.
GV3000/SE AC Drive Hardware Reference, Version 6.06
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