Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 121)

Rockwell Automation Publication 750-RM002B-EN-P - September 2013 121
Feedback and I/O Chapter 2
Functional Descriptions
DI Enable
Closing this input lets the drive run when a Start command is issued. If the drive
is already running when this input is opened, the drive will coast stop and
indicate “not enabled” on the HIM (if present). This is not considered a fault
condition, and no fault is generated. If this function is not configured, the drive is
considered enabled.
A combination of the hardware enable and a software enable can be utilized;
however, the drive will not run if any of the inputs are open.
DI Clear Fault
The “Clear Fault” digital input function lets an external device reset drive faults
through the terminal block. An open to closed transition on this input causes an
active fault (if any) to be reset.
DI Aux Fault
This input function is normally closed and lets external equipment fault the
drive. When this input opens, the drive faults on a F2 “Auxiliary Input” fault
code. If this input function is not configured, the fault will not occur.
DI Stop
An open input causes the drive to stop and become “Not Ready.” A closed input
lets the drive run when given a Start or Run command. If “Start” is configured,
then “Stop” must also be configured, otherwise, a digital input configuration
alarm occurs.
P370 [Stop Mode A] and P371 [Stop Mode B] dictate the drive’s stop action.
Refer to
Stop Modes on page 96 for more details.
DI Cur Lmt Stop
With this digital input function, an open input causes the drive to current limit
stop. The drive acknowledges the stop command by setting the motor speed
reference to zero, causing the drive to bring the motor down to zero speed as fast
as the power limits, torque limits, and current limits allow. When the drive
output reaches zero, the output transistors are shut off.
DI Coast Stop
With this digital input function, an open input causes the drive to Coast-to-Stop.
The drive acknowledges the stop command by shutting off the output transistors
and releasing control of the motor. The load/motor will coast or free spin until
the mechanical energy is dissipated.
IMPORTANT If the ENABLE (J1) jumper is removed, the Di 0 becomes a hardware enable.
For the PowerFlex 753, Di 0 is found on TB3 and for the PowerFlex 755, Di 0 is
found on TB1.