Rockwell Automation 1336VT AC DRIVE 5-300AMP (2-160KW) PROGRAMMING MANUAL - Manual (Page 43)

Local and Serial Port Parameters
Firmware Version 1.01-3.01
Chapter 3
3-29
Parameter 40 Ċ Power Fault
Freq P R
P R Enter On/Off
0
1
0
Read and Write
Units
Minimum Value
Maximum Value
Factory Setting
This parameter allows the sensing of a line power interrupt condition.
If set to 1, only the following sequence can occur.
On interruption of input power to the drive, the drive will continue to
operate from the stored energy of the DC bus until bus voltage drops below
85% of its nominal value. At this point, drive output is shut off and the DC
bus will discharge slower. Operating logic status will be retained as long
as bus voltage is above 388V DC.
If input power is restored and bus voltage rises above 85% of its nominal
value, the drive will restore output power to the motor and continue to run.
Should DC bus voltage fall below 388V DC however, a Bus Undervoltage
Fault (F04) will be displayed.
If set to 0, and additional Fault, Input Power Loss F03 may be displayed.
In addition to the above sequence, when the DC bus drops below 85% of
its nominal value but remains above 388V DC, a 500 msec timer is started.
If bus voltage does not rise above 85% of its nominal value before 500
msec, the drive will trip, shut down and display Fault F03. If input power is
restored and bus voltage rises above 85% of its nominal level before 500
msec, the drive will resume operation and the timer will be reset.