Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 122)

122 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 2 Feedback and I/O
DI Start
An open to closed transition while the drive is stopped causes the drive to run in
the current direction, unless the “Stop” input function is open. If “Start” is
configured, then a “Stop” must also be configured.
DI Fwd Reverse
This digital input function is one of the ways to provide direction control when
the “Start” or “Run” functions (not combined with direction) are used. 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, the drive changes direction.
DI Run Forward, DI Run Reverse
These digital input functions cause the drive to run and with a specific direction,
as long as the configured input is held closed. Also, these “2-wire” settings prevent
any other connected device from starting the drive. An open to closed transition
on one input or both inputs while the drive is stopped causes the drive to run
unless the “Stop” input function is configured and open.
The table below describes the basic action taken by the drive in response to
particular states of these input functions.
It is not necessary to program both “Run Forward” and “Run Reverse.” These
two functions operate with or without each other.
DI Run
This digital input function is similar to “Run Forward” and “Run Reverse”
settings. The only difference being that direction is determined by another input
or another device’s command (HIM or communication adapter).
DI Jog 1 Forward, DI Jog 1 Reverse, DI Jog 2 Forward, DI Jog 2 Reverse
Jog is a non-latched command such as Run, but overrides the normal speed
reference and uses P556 [ Jog Speed 1] or P557 [ Jog Speed 2] respectively.
An open to closed transition on one input or both inputs while the drive is
stopped causes the drive to jog unless the “Stop” input function is configured and
Run Forward Run Reverse Action
Open Open Drive stops, terminal block relinquishes direction ownership.
Open Closed Drive runs in reverse direction, terminal block takes direction ownership.
Closed Open Drive runs in forward direction, terminal block takes direction ownership.
Closed Closed Drive continues to run in current direction, but terminal block maintains
direction ownership.
IMPORTANT Direction control is an “Exclusive Ownership” function (see Owners). This means that
only one control device (terminal block, DPI device, HIM, and so forth) 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 P922 [Dir Owner]), it is not possible to start the drive
or change direction by using the terminal block digital inputs programmed for both
Run and Direction control (for example Run/Fwd).