Rockwell Automation FlexPak 3000 DC Drive Version 4.3 - Manual (Page 42)

2-28 FlexPak 3000 DC Drive Hardware Reference Version 4.3
2.5.5 Wire the Stop Input
The FlexPak 3000 drive can be stopped by the assertion of a stop input (which can be
configured as a ramp stop, a current limit stop, or a coast/DB stop), opening a
permissive input (coast/DB interlock or customer interlock), deassertion of the
JOG
input, or in the event of a fault. Depending on the type of stop, one of two different stop
sequences
are executed to provide an orderly method of deactivating the armature.
Previous to software version 4.0, once a stop sequence began, it ran to completion,
ignoring any
RUN or JOG requests received during the stop sequence.
To the sequencing algorithm, the drive is always in one of three states: armature not
active (main contactor open), in run mode, or in jog mode. The drive is considered to
be in “run mode” if it was started by the
RUN input. The drive will remain in run mode
until the completion of a stop sequence. Note that the drive can also enter the run
mode from the jog mode if the
RUN input is asserted while in jog mode. The drive is
considered to be in “jog mode” if it was started via the JOG input. The drive will remain
in jog mode until the completion of a stop sequence or the RUN input is asserted
causing the drive to switch from jog mode to run mode. Note that the OIM “RUNNING”
status indicates that the armature is active, either in run mode or jog mode.
Important: Only drives using software version 4.0 (and later) have the ability to
terminate a ramp/current limit stop sequence. Drives using earlier
versions of the software do not have this feature, and will ramp to stop
before a
RUN or jog request will be executed. Refer to “Stop Sequencing”
in chapter 3 of the FlexPak 3000 Software reference manual for more
information.
The FlexPak 3000 drive can be configured to provide a coast-to-rest operational stop
without physical separation of the power source from the motor. A coast-to-rest stop
turns off the thyristor power device drivers.
In addition to the operational stop, the user must provide an external, 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.
!
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.