Rockwell Automation FlexPak 3000 Digital DC Drive Version 4.3 - Manual (Page 14)

2-2 FlexPak 3000 DC Drive Software Reference
2.1 Run and Jog Sequencing
When powered, the drive is in one of three operating states:
• armature not active (main contactor open)
• run mode
• jog mode
The drive is in run mode if it was started by the RUN input. It remains in run mode until
the completion of a stop sequence.
Important: The drive is in jog mode if it was started by the JOG input. It remains in jog
mode until the completion of a stop sequence or until the RUN input is
asserted. If the RUN input is asserted, the drive switches from jog mode to
run mode. You cannot switch from run mode to jog mode by asserting the
JOG input. You must stop the drive before switching to jog mode.
If you switch from jog mode to run mode, the drive accelerates or decelerates to the
selected run reference as configured by
ACCELERATION TIME (P.001) or DECELERATION
TIME (P.002).
2.2 Stop Sequencing
The FlexPak 3000 drive can be stopped by:
• Asserting an active stop input
• Opening a permissive input (coast/DB interlock or customer interlock)
• Deasserting the jog input if the drive is in jog mode. Deasserting the jog input will
not initiate the stop sequence until the speed feedback is less than or equal to
STOP
SPEED THRESHOLD (P.113) or until the JOG OFF DELAY TIME (P.121) is exceeded,
whichever occurs last.
• Detecting a fault condition
There are three types of stop sequences: Coast/DB, ramp, and current limit. The type
of stop sequence used depends on the source of the stop and your parameter
configuration, as described below.
If a run or jog command is received while the drive is in a ramp or current limit stop
sequence, the stop sequence will be aborted and the drive will continue running or
jogging. Coast/DB stop sequences cannot be aborted.
!
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
can result if this procedure is not followed. Failure to observe this
precaution could result in bodily injury.