Allen-Bradley PowerFlex 70 Reference Manual page 75

causes a configuration alarm. See
configurations.
• Start
An open to closed transition while the drive is stopped will cause the drive to
run in the current direction, unless the "Stop – Clear Faults" input function is
open.
The terminal block bit must be set in the [Start Mask] and [Logic Mask]
parameters in order for the terminal block to start or change the direction of
the drive using these inputs.
If "Start" is configured, then "Stop - Clear Faults" must also be configured.
• Forward/Reverse
This function is one of the ways to provide direction control when the Start /
Stop / Run functions of the drive are configured as 3 – wire control.
An open input sets direction to forward. A closed input sets direction to
reverse. If state of input changes and drive is running or jogging, drive will
change direction.
The terminal block bit must be set in the [Direction Mask] and [Logic Mask]
parameters in order for the terminal block to select the direction of the drive
using this input function.
Important: Direction control is an "Exclusive Ownership" function (see
Owners). This means that only one control device (terminal
block, DPI device, HIM, etc.) at a time is allowed to control
direction at a time. The terminal block must become direction
"owner" before it can be used to control direction. If another
device is currently the direction owner (as indicated by
[Direction Owner]), it will not be possible to start the drive or
change direction by using the terminal block digital inputs
programmed for both Run and Direction control (i.e. Run/
Fwd).
Important: Because an open condition (or unwired condition) commands
Forward, the terminal block seeks direction ownership as soon as
this input function is configured, which may happen at power-up.
In order for the terminal block to actually gain ownership, the masks
must be set up correctly (see above) and no other device can
currently have direction ownership. Once the terminal block gains
direction ownership, it will retain it until shutdown, until the
[Direction Mask] or [Logic Mask] bits for the terminal block are
cleared, or until this input function is no longer configured
• Jog
Jog is essentially a non-latched "run/start" command. An open to closed
transition while drive is stopped causes drive to start (jog) in the current
direction. When the input opens while drive is running (jogging), the drive
will stop.
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
page 109 for typical 2 and 3-wire
Digital Inputs
75