Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 125)

Rockwell Automation Publication 750-RM002B-EN-P - September 2013 125
Feedback and I/O Chapter 2
DI BusReg Mode B
This digital input function selects how the drive regulates excess voltage on the
DC bus. If the input is open, then P372 [Bus Reg Mode A] selects which bus
regulation mode to use. If the input is closed, then P373 [Bus Reg Mode B]
selects which bus regulation mode to use. If this input function is not configured,
then P372 [Bus Reg Mode A] always selects which bus regulation mode to use.
See also
Bus Regulation on page 41 for more details.
DI PwrLoss ModeB
This digital input function selects between two different drive power loss modes.
If the input is open, P450 [Pwr Loss Mode A] dictates the drive’s action during
the Power Loss mode. If the input is closed, P371 [Stop Mode B] dictates the
drive’s action during the power loss. If this input function is not configured, P450
[Power Loss Mode A] always dictates the drive’s action during the power loss. See
also
Power Loss on page 72 for more details.
DI Pwr Loss
The drive contains a sophisticated algorithm to manage initial application of
power as well as recovery from a partial power loss event. This digital input
function is used to force the drive into a power loss condition. If this input is
open, the drive’s internal algorithm dictates the power loss condition. If the input
is closed, the algorithm is overridden and the drive is externally forced into a
power lost condition. P449 [Power Loss Actn] configures the drive’s response to a
power loss time out condition and P452 [Pwr Loss A Time] or P455 [Pwr Loss B
Time] set the time that the drive remains in Power Loss mode before a fault
occurs. See also
Power Loss on page 72 for more details.
DI Precharge
This digital input function is used to manage disconnection from a common DC
bus. If the input is closed, this indicates that the drive is connected to common
DC bus and normal precharge handling can occur, and that the drive can run
(start permissive). If the physical input is open, this indicates that the drive is
disconnected from the common DC bus, and the drive enters the precharge state
and initiates a coast stop immediately to prepare for reconnection to the bus. If
this input function is not configured, then the drive assumes that it is always
connected to the DC bus, and no special precharge handling is done.
DI Prchrg Seal
This digital input function is used to force a unique fault when an external
precharge circuit opens. P323 [Prchrg Err Cfg] dictates the action taken when an
external precharge circuit has opened.
DI PID Enable
If this digital input function is closed, the operation of the Process PID loop is
enabled. If this input function is open, the operation of the Process PID loop is
disabled.