452 Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018
return before Power Loss Timeout period expires, a Bus Power Loss Exception is
generated.
A Decel Regen action selection configures the drive to regeneratively charge the
DC bus by decelerating the motor using the bus regulator to regulate the bus
voltage at a predetermined level. When incoming power is restored the drive
returns to normal operation. If, however, the drive reaches zero speed or the Power
Loss Time period expires before the incoming power has restored, the drive power
structure is disabled and a Bus Power Loss exception is generated.
Power Loss Threshold
Usage Access T Data
Type
Default Min Max Semantics of Values
Optional - BD Set/SSV
REAL 0 0 10
3
%
Sets the Level for Power Loss as percent of nominal DC Bus Voltage. If this value
is 0, the hard-coded threshold is used.
Shutdown Action
Usage Access T Data
Type
Default Min Max Semantics of Values
Optional - BD Set/SSV UINT 0 (D)
1 (B)
- - Enumeration
0 = Disable (R)
1 = Drop DC Bus (R/B) (O/D))
2...127 = Reserved
128...255 = Vendor Specific
Shutdown Action selects the device's action when transitioning to the Shutdown
state as a result of a Shutdown Request, or in response to a Major Fault action
where the best available stopping action is Disable and Coast.
Disable, the default action, immediately disables the device's power structure
according to the Category 0 Stop Sequence.
If Drop DC Bus is selected, action can be taken to drop the DC Bus voltage as
well. This is generally done by opening an AC Contactor Enable output provided
by the drive that controls power to the converter.
In either case, the Shutdown Action executes the Category 0 Stop Sequence.
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