Power loss/ride through – Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual User Manual
Page 95
Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013
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Detail Drive Configuration and Operation
Chapter 1
Table 6 - Filter Settings
P237 [Port0 Regis Ctrl] Configures control for Port 0 Registration:
Setting Bit 0 = 1 is the arm request to capture the position on the next trigger
event. Setting Bit 1 = 1 is the disarm request to capture on the next trigger event.
P238 [Port0 Regis Stat] Port 0 Registration Status:
Bit 0 [Armed] indicates the registration latch is armed and waiting for a trigger.
Bit 1 [Found] indicates the registration event has occurred and the value is stored
in P235 [Port0 Regis Ltch].
Power Loss/Ride Through
The precharge function provides a current limited charging of the drive's bus
capacitor(s) and, when charging is complete, bypasses the current limiting device.
This current limited charging primarily protects the drive's input fuses and front-
end rectifiers (or SCRs) from excessive inrush current. The bypass function is
needed for normal drive operation to avoid overloading the current limiting
device. In general, when precharge is active, the current limiting device is in
circuit and when precharge is done the bypass device is active (see exceptions
below).
The ride through function can provide a motor coast, precharge and auto-restart
sequence of operation in the event of an input power dropout (power loss and
return). First the drive stops PWM operation “coasting the motor” and saving any
remaining power stored in the drive's bus capacitor(s) for extended control logic
operating time. Next, the precharge function limits the drive's inrush current in
the event that the incoming power to the drive is restored. Last, after the power is
Bit
Input Filter Setting
11
10
9
8
0
0
0
0
Filter disabled
0
0
0
1
100 ns filter
0
0
1
0
200 ns filter
0
0
1
1
300 ns filter
0
0
1
1
300 ns filter
0
1
0
0
400 ns filter
0
1
0
1
500 ns filter
0
1
1
0
600 ns filter
0
1
1
1
700 ns filter
1
0
0
0
800 ns filter (default setting)
1
0
0
1
900 ns filter
1
0
1
0
1000 ns filter
1
0
1
1
1100 ns filter
1
1
0
0
1200 ns filter
1
1
0
1
1300 ns filter
1
1
1
0
1400 ns filter
1
1
1
1
1500 ns filter